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WO2025087909A1 - Réfractaire à haute température - Google Patents

Réfractaire à haute température Download PDF

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Publication number
WO2025087909A1
WO2025087909A1 PCT/EP2024/079837 EP2024079837W WO2025087909A1 WO 2025087909 A1 WO2025087909 A1 WO 2025087909A1 EP 2024079837 W EP2024079837 W EP 2024079837W WO 2025087909 A1 WO2025087909 A1 WO 2025087909A1
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WO
WIPO (PCT)
Prior art keywords
refractory lining
reaction zone
zirconium
reactor
zone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2024/079837
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English (en)
Inventor
Arndt-Peter Schinkel
Rudolf Scharffenberg-Kahlke
David DETERS
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Orion Engineered Carbons GmbH
Original Assignee
Orion Engineered Carbons GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Orion Engineered Carbons GmbH filed Critical Orion Engineered Carbons GmbH
Publication of WO2025087909A1 publication Critical patent/WO2025087909A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/44—Carbon
    • C09C1/48—Carbon black
    • C09C1/50—Furnace black ; Preparation thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3241—Chromium oxides, chromates, or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/72—Products characterised by the absence or the low content of specific components, e.g. alkali metal free alumina ceramics
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/79—Non-stoichiometric products, e.g. perovskites (ABO3) with an A/B-ratio other than 1
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/12—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on chromium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/48—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on zirconium or hafnium oxides, zirconates, zircon or hafnates
    • C04B35/482—Refractories from grain sized mixtures

Definitions

  • the present invention relates to an entrained flow reactor, such as a furnace reactor, for the production of carbon black that comprises a high temperature refractory that is stable under a reducing atmosphere.
  • Carbon blacks have numerous uses such as a reinforcing agent or filler for the rubber and tire industries. Moreover, carbon black has seen increased use in other areas such as coloring agents and reprographic toners for copying machines. The various applications of carbon black necessitate a diverse range of carbon black characteristics such as particle size, structure, yield, surface area, and stain.
  • the production of carbon black entails the cracking or thermal decomposition of a carbon-containing feedstock in a reaction chamber at temperatures well above 800°C (e.g. in the temperature range of 1900 °C and 2400 °C). These high temperatures are obtained by the combustion of a mixture comprising oxygen-containing gas and a combustion fuel (i.e. fuel).
  • the carbon black (CB) entrained in the gases (hot gas flow) exiting the reaction chamber are then cooled in a quenching operation and then collected by any suitable means conventionally used in the art.
  • carbon black is produced in an entrained flow reactor such as a furnace reactor.
  • the refractory lining or inner refractory lining of the reactor is formed from a material that withstand the high temperatures during the manufacturing of carbon black.
  • an alumina (aluminium oxide) containing refractory is utilized that comprises at least 80 wt.-% of alumina, based on the total weight of the refractory.
  • alumina refractories have the drawback of a low melting point such as about 1900 °C or up to 2072 °C.
  • an entrained flow reactor such as a furnace reactor, for the production of carbon black comprising from upstream to downstream a combustion zone, a reaction zone and a quenching zone, wherein the reaction zone comprises carbon black feedstock injection means, characterized in that (A) the refractory lining in the combustion zone comprises zirconium, and has a melting point between 2500 and 3000 °C, and (B) the refractory lining in the reaction zone comprises chromium, and has a melting point between 2100 and 2800 °C.
  • a method for the production of carbon black in a reactor comprising: (a) combusting a fuel mixture in a combustion zone to obtain a hot gas flow, wherein the temperature in the combustion zone and/or the temperature of the hot gas flow is between 2100 to 2700 °C, (b) injecting a carbon black feedstock to the hot gas flow in a reaction zone to obtain a hot reaction mixture, wherein the temperature in the reaction zone is between 1200 to 2400 °C, and (c) quenching the hot reaction mixture downstream the reaction zone of the reactor.
  • Figure 1 A furnace reactor is shown in which the reaction zone begins in the combustion chamber since the feedstock is inserted into the combustion chamber.
  • Figure 2 A furnace reactor is shown in which the reaction zone begins in the choke since the feedstock is inserted into the choke.
  • any numerical range recited herein is intended to include all sub-ranges subsumed therein.
  • a range of “1 to 10” is intended to include all sub-ranges between (and including) the recited minimum value of 1 and the recited maximum value of 10, that is, having a minimum value equal to or greater than 1 and a maximum value of equal to or less than 10.
  • the transitional term “comprising” (and other comparable terms, e.g., “containing” and “including”) is “open-ended” and open to the inclusion of unspecified matter. Although described in terms of “comprising”, the terms “consisting essentially of’ and “consisting of’ are also within the scope of the disclosure. As used herein, the term “including” and like terms means “including but not limited to”.
  • Carbon black as referred to herein means a material composed substantially, e.g. to more than 80 wt.%, or more than 90 wt.% or more than 95 wt.%, based on its total weight of carbon that is produced by pyrolysis or radical driven abstraction of not carbon atoms of a carbon-containing feedstock.
  • Different industrial processes are known for the production of carbon blacks such as the furnace process, gas black process, acetylene black process, thermal black process or lamp black process.
  • the production of carbon blacks is per se well known in the art and for example outlined in J.-B. Donnet et al., “Carbon Black:Science and Technology”, 2 nd edition, therefore being not described herein in more detail.
  • a reducing atmosphere refers to an atmosphere or a hot gas flow that comprises an actively reducing gas such as hydrogen.
  • An entrained flow reactor for the production of carbon black comprising from upstream to downstream a combustion zone, a reaction zone and a quenching zone, wherein the reaction zone comprises carbon black feedstock injection means, characterized in that (A) the refractory lining in the combustion zone comprises zirconium, and has a melting point between 2500 and 3000 °C, and (B) the refractory lining in the reaction zone comprises chromium, and has a melting point between 2100 and 2800 °C.
  • the refractory lining in the combustion zone is a zirconium refractory lining followed by the refractory lining in the reaction zone that is a chromium refractory lining.
  • the expressions refractory lining comprises zirconium and zirconium refractory lining can be used interchangeably. Similarly, the expressions refractory lining comprises chromium and chromium refractory lining can be used interchangeably. Similarly, the expressions refractory lining comprises aluminum and aluminum refractory lining can be used interchangeably.
  • refractory lining (A) is directly attached to the refractory lining (B).
  • the refractory lining (A) and (B) (as well as (C)) generally refers to the inner refractory lining, i.e. the refractory lining that represents the inner surface of the reactor.
  • no refractory lining comprising alumina i.e alumina refractory lining
  • aluminum can melt and form a eutectic mixture with zirconium that has a very low melting point. This may damage the reactor.
  • all carbon black feedstock injection means i.e. feedstock injection means
  • feedstock injection means are within the reaction zone.
  • a chromium refractory lining is installed at the first (upstream to downstream) carbon black feedstock injection means and up to the quenching zone. Chromium refractory lining should be present on the entire inner surface of the reactor starting from the first (upstream to downstream) carbon black feedstock injection means and up to the quenching zone.
  • none carbon black feedstock injection means are within the combustion zone and/or on refractory lining in the combustion zone comprising zirconium, and having a melting point between 2500 and 3000 °C.
  • the first zone comprises in essentially the combustion chamber of the reactor.
  • a hot process gas (or hot combustion gas) is generated by a fuel, with an excess of preheated combustion air or other oxygencontaining gases is burned.
  • the fuel used today is mainly natural gas, but also liquid hydrocarbons such as light and heavy fuel oil can be used.
  • the fuel is burned usually under excess of oxygen.
  • the oxygen is usually provided by a stream of oxygencontaining gas, such as air or oxygen. The excess oxygen promotes the complete combustion of the fuel and serves to control the carbon black quality.
  • the fuel will usually be introduced by means of one or more burner lances in the combustion chamber.
  • the temperature can reach very high temperatures such as 2100 to 2700 °C.
  • a standard alumina refractory lining is not able to withstand such high temperatures.
  • the present invention utilizes zirconium refractory lining having a melting point between 2500 and 3000 °C.
  • the so-called reaction zone the so-called reaction zone (or pyrolysis zone finds), the carbon black formation takes place.
  • the carbon black feedstock e.g. liquid carbon-containing feedstocks, particulate carbon-containing feedstock
  • the hot process gas or hot combustion gas
  • the temperature can reach temperatures such as 1200 to 2400 °C.
  • a zirconium refractory can withstand such high temperatures but a zirconium refractory lining is undesirable in a reducing atmosphere.
  • the reducing component can react with the zirconium refractory lining.
  • the present invention utilizes chromium refractory lining having a melting point between 2100 and 2800 °C.
  • the so-called quenching zone the carbon black formation is stopped caused by rapid cooling of the carbon black-containing process gas (or hot combustion gas). This avoids undesirable post-reactions. Such afterreactions would lead to porous carbon black.
  • the reaction is usually stopped by spraying of water using suitable spray nozzles.
  • the residual heat of the process gas (or hot combustion gas) is used to preheat the combustion air and the carbon black feedstock oil.
  • the melting point of the refractory lining in the combustion chamber has a higher melting point than the refractory lining in the reaction chamber.
  • an alumina refractory lining is present in the quenching zone.
  • the temperature is much lower in the quenching zone.
  • an alumina refractory lining should not be in contact with a zirconium refractory lining.
  • the refractory lining (A) is not in contact with an alumina refractory lining, such as an alumina refractory lining in the quenching zone.
  • An alumina refractory lining can be Kaocrete ® 32-cm which is 70% alumina (Ah O3) and has a melting point of 1871 °C. Additionally, a brick refractory can be relied upon such as RUBY SR (sold by Harrison-Walker Refractories, Pittsburgh, Pa.) brick refractory which is 84.5% alumina along with 9.8% chromic oxide (Cr 2 O3) and has a melting point of 2049 °C.
  • the shell of the carbon black reactor is preferably formed of carbon steel except for any piping in contact with hot process air. In those areas, the piping is formed of "316 Stainless Steel".
  • the refractory lining in the combustion zone can have a melting point of 2550 to 2800 °C, more preferably 2600 to 2750 °C, most preferably 2650 to 2720 °C.
  • the refractory lining in the combustion zone can comprise zirconium, preferably zirconium oxide, most preferably Zr2O.
  • the refractory lining in the combustion zone can comprise 10 to 100 wt.-% zirconium, preferably 30 to 99 wt.-% zirconium, more preferably 40 to 98 wt.-% zirconium, even more preferably 60 to 98 wt.-% zirconium, and most preferably 80 to 97 wt.-% zirconium, based on the total weight of the metal content of the refractory lining in the combustion zone.
  • the refractory lining in the combustion zone can comprise 10 to 100 wt.-% zirconium oxide, preferably 30 to 99 wt.-% zirconium oxide, more preferably 40 to 98 wt.-% zirconium oxide, even more preferably 60 to 98 wt.-% zirconium oxide, and most preferably 80 to 97 wt.-% zirconium oxide, based on the total weight of the refractory lining in the combustion zone.
  • the refractory lining in the combustion zone can comprise 0.1 to 10 wt.-% copper, preferably 1 to 8 wt.-% copper, more preferably 2 to 7 wt.-% copper, even more preferably 3 to 7 wt.-% copper, and most preferably 4 to 6 wt.-% copper, based on the total weight of the metal content of the refractory lining in the combustion zone.
  • the refractory lining in the combustion zone can comprise 0.1 to 10 wt.-% iridium, preferably 1 to 8 wt.-% iridium, more preferably 2 to 7 wt.-% iridium, even more preferably 3 to 7 wt.-% iridium, and most preferably 4 to 6 wt.-% iridium, based on the total weight of the metal content of the refractory lining in the combustion zone.
  • the refractory lining in the reaction zone can comprise chromium oxide, preferably comprising CrO, &2O3, CrC>2, CrC>3, CrOs, and/or CrsChi, most preferably the refractory lining in the reaction zone comprises C ⁇ Ch.
  • the refractory lining in the reaction zone can comprise 10 to 100 wt.-% chromium, preferably 30 to 99 wt.-% chromium, more preferably 40 to 98 wt.-% chromium, even more preferably 60 to 98 wt.-% chromium, and most preferably 95 to 100 wt.-% chromium, based on the total weight of the metal content of the refractory lining in the reaction zone.
  • the refractory lining in the reaction zone can comprise 10 to 100 wt.-% chromium oxide, preferably 30 to 99 wt.-% chromium oxide, more preferably 40 to 98 wt.-% chromium oxide, even more preferably 60 to 98 wt.-% chromium oxide, and most preferably 95 to 100 wt.-% chromium oxide, based on the total weight of the refractory lining in the reaction zone.
  • the chromium refractory lining can be present 1 to 20 cm, preferably 5 to 15 cm, more preferably 5 to 10 cm, upstream the first feedstock injection means. It is particularly desired that the chromium refractory lining that is present upstream the first feedstock injection means is cooled, particularly as described below.
  • the melting point of the refractory lining in the reaction zone can be between 2100 and 2500 °C, preferably 2100 to 2450 °C, more preferably 2200 to 2450 °C, and most preferably 2300 to 2440 °C.
  • the reaction zone is generally considered as the zone in which the feedstock is injected.
  • the reaction zone generally can comprise carbon black feedstock injection means.
  • the refractory lining material of the refractory lining in the reaction zone can comprise magnesium, such as magnesium oxide.
  • the refractory lining in the reaction zone preferably comprises less than 5 wt.-% aluminum, preferably less than 1 wt.-% aluminum, more preferably less than 0.5 wt.-% aluminum, based on the total weight of the metal content of the refractory lining in the reaction zone, and most preferably the refractory lining in the reaction zone is free of aluminum.
  • the refractory lining in the reaction zone preferably comprises less than 5 wt.-% alumina, preferably less than 1 wt.-% alumina, more preferably less than 0.5 wt.-% alumina, based on the total weight of the refractory lining in the reaction zone, and most preferably the refractory lining in the reaction zone is free of alumina.
  • the refractory lining in the reaction zone preferably comprises less than 5 wt.-% zirconium, preferably less than 1 wt.-% zirconium, more preferably less than 0.5 wt.-% zirconium, based on the total weight of the metal content of the refractory lining and/or based on the total weight of the refractory lining, and most preferably the refractory lining in the reaction zone is free of zirconium.
  • the refractory lining in the reaction zone preferably comprises less than 5 wt.-% zirconium oxide, preferably less than 1 wt.-% zirconium oxide, more preferably less than 0.5 wt.-% zirconium oxide, based on the total weight of the refractory lining and/or based on the total weight of the refractory lining, and most preferably the refractory lining in the reaction zone is free of zirconium oxide.
  • the reactor can comprise from upstream to downstream a combustion zone, a reaction zone, a choke, and a quenching zone.
  • the choke can have the same refractory lining as the reaction zone.
  • the quenching zone can have the same refractory lining as the reaction zone.
  • the reactor comprises from upstream to downstream a combustion zone, a choke, a reaction zone, and a quenching zone.
  • the choke can have the same refractory lining as the combustion zone.
  • the quenching zone can have the same refractory lining as the combustion zone.
  • the choke can comprise carbon black feedstock injection means and the choke has a refractory lining as defined for the refractory lining in the reaction zone (i.e. chromium refractory lining).
  • the refractory lining of the choke can comprise aluminum, preferably aluminum oxide, most preferably AI2O3. However, it is desired that the choke (or choke zone) is located between the reaction zone and the quenching zone. Thus, an aluminum refractory lining is not adjacent to the zirconium refractory lining.
  • reaction zone is in the choke.
  • means for supplying the carbon black feedstock is located in the choke.
  • the refractory lining in the choke can comprise aluminum and chromium, preferably aluminum oxide and chromium oxide, most preferably 99 to 80 wt.-% of aluminum and up to 20 wt.-% of chromium, based on the total weight of the metal content of the refractory lining in the choke.
  • the refractory lining in the choke can have a melting point between 1800 and 2500 °C, preferably 1850 to 2200 °C, more preferably 1900 to 2100 °C, most preferably 1950 to 2080 °C.
  • the refractory lining is generally provided as a brick. Accordingly, the reactor is lined with the specific refractory lining bricks so that the inner surface of the reactor is fully covered with said bricks.
  • the refractory linings according to the present invention can also be provided in unshaped form such as castable materials.
  • the reactor can comprise cooling means for cooling the refractory lining of the choke.
  • the reactor can comprise cooling means for cooling the refractory lining in the reaction zone. Cooling means can reduce the temperature of the respective refractory lining.
  • the chromium refractory lining is not able to withstand the same high temperature compared to the zirconium refractory lining so that cooling the chromium refractory lining will help to ensure the integrity of the refractory lining.
  • the cooling means can be a water pipe in the respective refractory lining. Thus, water can be supply through the cooling means in order to cool the respective refractory lining.
  • a method for the production of carbon black in a reactor comprising: (a) combusting a fuel mixture in a combustion zone to obtain a hot gas flow, wherein the temperature in the combustion zone and/or the temperature of the hot gas flow (or in the combustion zone) is between 2100 to 2700 °C, (b) injecting a carbon black feedstock to the hot gas flow in a reaction zone to obtain a hot reaction mixture, wherein the temperature in the reaction zone is between 1200 to 2400 °C, and (c) quenching the hot reaction mixture downstream the reaction zone of the reactor.
  • the temperature of the hot gas flow (or in the combustion zone) can be between 2300 to 2700 °C, preferably between 2400 to 2700 °C, more preferably between 2500 to 2700 °C.
  • the temperature in the reaction zone is between 1300 to 2400 °C, preferably between 1600 to 2400 °C, more preferably between 1900 to 2400 °C, even more preferably between 2000 to 2400 °C, and most preferably between 2100 to 2400 °C.
  • the temperature in the reaction zone is lower than the temperature of the hot gas flow.
  • the hot gas flow or hot reaction mixture is guided through a choke of the reactor.
  • the temperature in the reaction zone is preferably lower than the melting point in the refractory lining in the reaction zone.
  • the temperature in the combustion zone is preferably lower than the melting point of the refractory lining in the combustion zone.
  • step (b) The injection according to step (b) is preferably done upstream the choke of the reactor, downstream the choke of the reactor, and/or in the choke of the reactor.
  • a second carbon black feedstock can be injected in the hot gas flow downstream the injection according to step (b). It is preferred that the entire carbon black feedstock is injected in the reaction zone.
  • a furnace reactor comprising a combustion zone (201), a reaction zone (301), a choke (304) and a quenching zone (503).
  • the combustion zone (201) comprises means to inject a fuel (103) and oxygen-containing gas (102).
  • the oxygen-containing gas is injected into the combustion zone (201) tangential or radial via oxygen containing gas means (102) and the fuel is injected into the combustion zone (201) axial via fuel injection means (103).
  • the oxygen-containing gas is preheated. It is possible to adjust the temperature of the hot gas flow with the preheating of the oxygen-containing gas. Alternatively, the fuel can be preheated.
  • the fuel is combusted in the presence of the oxygen-containing gas.
  • first feedstock injection means (302, 303, 305) refer to the feedstock injection means (302, 303, 305) that is first present in the reactor from upstream to downstream.
  • the reaction zone (301) normally extends up to the quenching zone (501) or up to the first quenching means (502).
  • the refractory lining (200) in the combustion zone (201) comprises zirconium, and has a melting point between 2500 and 3000 °C.
  • the refractory lining (300) in the reaction zone (301) comprises chromium, and has a melting point between 2100 and 2800 °C.
  • the reaction zone (301) starts in the combustion chamber of the reactor. It is desired that the chromium refractory lining (300) begins at the position of the first feedstock injection means (302, 303, 305) (i.e. begins at the reaction zone) since after the pyrolysis of the feedstock, a reducing atmosphere is present that would negatively affect a zirconium refractory lining. It is also possible that the chromium refractory lining is present a short distance before (upstream) the first feedstock injection means (302, 303, 305). For instance, chromium refractory lining is present 1 to 10 cm upstream the first feedstock injection means (302, 303, 305).
  • reaction zone (301) is cooled by cooling means that are not shown in the figure.
  • the chromium refractory lining (300) extends up to the position in which the temperature of the gas flow is low enough so that a different refractory lining can be utilized such as an alumina refractory lining. Generally, the temperature is significantly lower in the quenching zone (501).
  • the chromium refractory lining (300) can begin at the position of the first feedstock injection means (302, 303) (i.e. begins at the reaction zone) and up to the quenching zone (501).
  • the refractory lining of the quenching zone (500) can be any known refractory lining for a carbon black reactor known in the art such as an alumina refractory lining or a chromium refractory lining.
  • an alumina refractory lining in the quenching zone is preferred.
  • the furnace reactor comprises multiple positions for the quench (502).
  • the quench medium that is usually water reduces the temperature of the hot gas flow so that the reaction for forming the carbon black is terminated. Accordingly, the position of the quench (502) has an influence of the residence time of the feedstock as well as the components derived from the feedstock.
  • Figure 2 reveals a further furnace reactor for the production of carbon black in which the feedstock injection means (302, 303, 305) (i.e. first feedstock injection means (302, 303, 305)) is located in the choke (304) so that the reaction zone (301) is further downstream compared to the reactor in Figure 1.
  • the reaction zone can be considered as the zone at which the first feedstock injection means (302, 303, 305) (from upstream to downstream) are present and preferably the reaction zone extends at least to the quenching zone.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

La présente invention concerne un réacteur à écoulement entraîné, tel qu'un réacteur à four, pour la production de noir de carbone qui comprend un réfractaire à haute température qui est stable sous une atmosphère réductrice.
PCT/EP2024/079837 2023-10-23 2024-10-22 Réfractaire à haute température Pending WO2025087909A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP23205162.3 2023-10-23
EP23205162 2023-10-23

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WO2025087909A1 true WO2025087909A1 (fr) 2025-05-01

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PCT/EP2024/079837 Pending WO2025087909A1 (fr) 2023-10-23 2024-10-22 Réfractaire à haute température

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0982378A1 (fr) * 1997-08-28 2000-03-01 Mitsubishi Chemical Corporation Noir de carbone et procede de production
JP2000345070A (ja) * 1999-04-01 2000-12-12 Mitsubishi Chemicals Corp カーボンブラック製造装置及びカーボンブラックの製造方法
JP2003301123A (ja) * 2002-04-09 2003-10-21 Asahi Carbon Kk イットリア質耐火物を内張りしたカーボンブラック製造炉
US20110120853A1 (en) * 2009-11-20 2011-05-26 Chun Changmin Porous Pyrolysis Reactor Materials And Methods

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0982378A1 (fr) * 1997-08-28 2000-03-01 Mitsubishi Chemical Corporation Noir de carbone et procede de production
JP2000345070A (ja) * 1999-04-01 2000-12-12 Mitsubishi Chemicals Corp カーボンブラック製造装置及びカーボンブラックの製造方法
JP2003301123A (ja) * 2002-04-09 2003-10-21 Asahi Carbon Kk イットリア質耐火物を内張りしたカーボンブラック製造炉
US20110120853A1 (en) * 2009-11-20 2011-05-26 Chun Changmin Porous Pyrolysis Reactor Materials And Methods

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