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FR2405899A1 - NEW CRYSTALLINE ALUMINA MONOHYDRATE USEFUL AS A CATALYST SUPPORT AND ITS PREPARATION PROCESS - Google Patents

NEW CRYSTALLINE ALUMINA MONOHYDRATE USEFUL AS A CATALYST SUPPORT AND ITS PREPARATION PROCESS

Info

Publication number
FR2405899A1
FR2405899A1 FR7808965A FR7808965A FR2405899A1 FR 2405899 A1 FR2405899 A1 FR 2405899A1 FR 7808965 A FR7808965 A FR 7808965A FR 7808965 A FR7808965 A FR 7808965A FR 2405899 A1 FR2405899 A1 FR 2405899A1
Authority
FR
France
Prior art keywords
alumina
suspension
degrees
temperature
useful
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.)
Granted
Application number
FR7808965A
Other languages
French (fr)
Other versions
FR2405899B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GCP Products UK Ltd
WR Grace and Co Conn
Original Assignee
WR Grace Ltd
WR Grace and Co Conn
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
Priority claimed from US05/781,393 external-priority patent/US4154812A/en
Priority claimed from US05/781,379 external-priority patent/US4179408A/en
Application filed by WR Grace Ltd, WR Grace and Co Conn filed Critical WR Grace Ltd
Publication of FR2405899A1 publication Critical patent/FR2405899A1/en
Application granted granted Critical
Publication of FR2405899B1 publication Critical patent/FR2405899B1/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/34—Preparation of aluminium hydroxide by precipitation from solutions containing aluminium salts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
    • B01J21/04—Alumina
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J35/61—Surface area
    • B01J35/615—100-500 m2/g
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J35/63—Pore volume
    • B01J35/635—0.5-1.0 ml/g
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J35/63—Pore volume
    • B01J35/638—Pore volume more than 1.0 ml/g
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J35/64—Pore diameter
    • B01J35/647—2-50 nm
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/021—After-treatment of oxides or hydroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2235/00—Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties
    • B01J2235/15—X-ray diffraction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/31—Density
    • B01J35/32—Bulk density
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/34—Mechanical properties
    • B01J35/36—Mechanical strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/34—Mechanical properties
    • B01J35/37—Crush or impact strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/34—Mechanical properties
    • B01J35/38—Abrasion or attrition resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/70—Catalysts, in general, characterised by their form or physical properties characterised by their crystalline properties, e.g. semi-crystalline
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/60—Compounds characterised by their crystallite size
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/30—Particle morphology extending in three dimensions
    • C01P2004/32—Spheres
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/10—Solid density
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/11—Powder tap density
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/14—Pore volume
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/16—Pore diameter
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/16—Pore diameter
    • C01P2006/17—Pore diameter distribution
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/21—Attrition-index or crushing strength of granulates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/22—Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Catalysts (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

L'invention concerne une alumine alpha monohydratée cristalline utile notamment comme support pour catalyseur et son procédé de préparation. Le procédé de préparation de l'alumine selon l'invention comprend les étapes suivantes : a. on ajoute une solution aqueuse d'un sel d'alumine ayant une concentration en Al2 O3 d'environ 5 à 9 % en poids et une température d'environ 54 à 71 degrés C à de l'eau à une température d'environ 60 à 77 degrés C, ladite solution étant ajoutée en quantité suffisante pour ajuster le pH du mélange à environ 2-5 ; b. on ajoute au mélange une nouvelle quantité de sel d'aluminium en ajoutant simultanément, mais séparément, une solution aqueuse d'un aluminate de métal alcalin ayant une concentration en Al2 O3 d'environ 18 à 22 % en poids et une température d'environ 54 à 71 degrés C pour précipiter l'alumine et former une bouillie d'alumine, en élevant le pH du mélange à une valeur comprise dans la gamme d'environ 7 à environ 8; c. on maintient le pH de la suspension entre environ 7 et environ 8, la température de la suspension entre environ 60 et 82 degrés C et une vitesse d'addition de la solution de sel d'aluminium et de la solution d'aluminate de métal alcalin pour précipiter un intermédiaire boehmite-pseudobochmite; d. on ajuste le pH de la suspension entre environ 9,5 et environ 10,5; et e. on filtre la suspension et on lave le gâteau de filtration.The invention relates to a crystalline alpha alumina monohydrate useful in particular as a support for a catalyst and its method of preparation. The process for preparing the alumina according to the invention comprises the following steps: a. an aqueous solution of an alumina salt having an Al2 O3 concentration of about 5 to 9% by weight and a temperature of about 54 to 71 degrees C is added to water at a temperature of about 60 at 77 degrees C, said solution being added in an amount sufficient to adjust the pH of the mixture to about 2-5; b. a further quantity of aluminum salt is added to the mixture by simultaneously adding, but separately, an aqueous solution of an alkali metal aluminate having an Al2 O3 concentration of about 18 to 22% by weight and a temperature of about 54 to 71 degrees C to precipitate the alumina and form an alumina slurry, raising the pH of the mixture to a value in the range of about 7 to about 8; vs. maintaining the pH of the suspension between about 7 and about 8, the temperature of the suspension between about 60 and 82 degrees C and an addition rate of the aluminum salt solution and the alkali metal aluminate solution to precipitate a boehmite-pseudobochmite intermediate; d. adjusting the pH of the suspension to between about 9.5 and about 10.5; summer. the suspension is filtered and the filter cake washed.

FR7808965A 1977-03-25 1978-03-28 NOVEL CRYSTALLINE ALUMINA MONOHYDRATE USEFUL AS A CATALYST SUPPORT AND PREPARATION METHOD THEREOF Expired FR2405899B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/781,393 US4154812A (en) 1977-03-25 1977-03-25 Process for preparing alumina
US05/781,379 US4179408A (en) 1977-03-25 1977-03-25 Process for preparing spheroidal alumina particles

Publications (2)

Publication Number Publication Date
FR2405899A1 true FR2405899A1 (en) 1979-05-11
FR2405899B1 FR2405899B1 (en) 1985-10-04

Family

ID=27119846

Family Applications (2)

Application Number Title Priority Date Filing Date
FR7808965A Expired FR2405899B1 (en) 1977-03-25 1978-03-28 NOVEL CRYSTALLINE ALUMINA MONOHYDRATE USEFUL AS A CATALYST SUPPORT AND PREPARATION METHOD THEREOF
FR7826852A Expired FR2405900B1 (en) 1977-03-25 1978-09-19 PROCESS FOR THE PREPARATION OF SPHEROIDAL ALUMINA PARTICLES AND THE USE OF SAID PARTICLES AS CATALYST SUPPORTS

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR7826852A Expired FR2405900B1 (en) 1977-03-25 1978-09-19 PROCESS FOR THE PREPARATION OF SPHEROIDAL ALUMINA PARTICLES AND THE USE OF SAID PARTICLES AS CATALYST SUPPORTS

Country Status (4)

Country Link
JP (1) JPS53119800A (en)
DE (2) DE2858783C2 (en)
FR (2) FR2405899B1 (en)
GB (4) GB1603464A (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4392987A (en) * 1981-12-30 1983-07-12 W. R. Grace & Co. Alumina spheroids with controlled small particle size and a process for producing them
FR2518986B1 (en) * 1981-12-30 1985-09-06 Criceram PROCESS FOR THE PREPARATION OF HIGH-PURITY ALUMINS FROM IMPURE SOLUTIONS OF ALUMINUM CHLORIDE
DE3212249C2 (en) * 1982-04-02 1986-08-21 Condea Chemie GmbH, 2212 Brunsbüttel Process for the production of spherical clay
JPS58190823A (en) * 1982-04-26 1983-11-07 Chiyoda Chem Eng & Constr Co Ltd Method for manufacturing alumina carrier
US4513101A (en) * 1983-07-27 1985-04-23 W. R. Grace & Co. Small bead auto exhaust catalyst
JPS6340724A (en) * 1986-08-04 1988-02-22 Kumamoto Pref Gov Production of low-soda alumina powder
US6713428B1 (en) * 1998-07-06 2004-03-30 Instuit Francais Du Petrole Dispersible aluminium hydrate, method for preparing same and use for preparing catalysts
JP4639443B2 (en) * 1999-08-30 2011-02-23 住友化学株式会社 Boehmite and underlayer of magnetic recording medium formed using the same
JP3715482B2 (en) * 1999-11-04 2005-11-09 エヌ・イーケムキャット株式会社 Carbon monoxide selective oxidation catalyst in hydrogen-containing gas, carbon monoxide removal method using the catalyst, and solid polymer electrolyte fuel cell system
DE10221668B4 (en) * 2002-05-16 2005-04-28 Daimler Chrysler Ag Spherical catalytic converter for internal combustion engines and method for catalyzing exhaust gases or pollutant mixtures
TWI432381B (en) * 2005-12-12 2014-04-01 Grace W R & Co Alumina particles
MX353298B (en) * 2010-11-16 2018-01-08 Rhodia Operations ALUMINUM CATALYST SUPPORT.
FR2984180B1 (en) * 2011-12-20 2025-10-17 Ifp Energies Now PROCESS FOR PRODUCING SPHEROIDAL ALUMINA PARTICLES
TWI579043B (en) 2012-02-17 2017-04-21 先進精鍊科技有限公司 Spherical catalyst support and preparation method thereof
TWI611836B (en) 2012-02-17 2018-01-21 Advanced Refining Technologies Llc. Catalyst support and preparation method thereof
FR2997948B1 (en) * 2012-11-15 2014-11-28 IFP Energies Nouvelles PROCESS FOR ISOMERIZING AN AROMATIC C8 CUT IN THE PRESENCE OF A CATALYST BASED ON A EUO ZEOLITE AND A PARTICULAR SODIUM CONTENT
US10443100B2 (en) 2014-05-22 2019-10-15 The Scripps Research Institute Gene expression profiles associated with sub-clinical kidney transplant rejection
FR3022235B1 (en) * 2014-06-13 2021-05-07 Ifp Energies Now HIGH DISPERSIBILITY GEL AND ITS PREPARATION PROCESS
DK3177566T3 (en) * 2014-08-08 2020-03-23 Sasol Performance Chemicals Gmbh Precipitated alumina and process for manufacture
CN112429755A (en) * 2020-11-18 2021-03-02 山东物华新材料科技有限公司 Preparation method of water treatment active alumina ball
WO2022196025A1 (en) 2021-03-19 2022-09-22 日揮触媒化成株式会社 Silica-alumina powder, method for producing silica-alumina powder, fluid catalytic cracking catalyst and method for producing same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1958710A (en) * 1933-03-23 1934-05-15 Paul S Moyer Colloidal aluminum hydroxide and method of making the same
FR1267749A (en) * 1960-09-21 1961-07-21 Nalco Chemical Co Process for the preparation of an alumina catalyst support and resulting products
FR1414641A (en) * 1963-12-06 1965-10-15 Grace W R & Co Improved process for the preparation of alumina gels by atomization and alumina gels obtained by this process
US3520654A (en) * 1963-12-06 1970-07-14 Grace W R & Co Process for the preparation of low density alumina gel
DE2302724A1 (en) * 1972-01-19 1973-08-09 Grace W R & Co Continuous porous alumina prodn - by slurrying solns of sodium aluminate and aluminium sulphate
US3864451A (en) * 1973-08-16 1975-02-04 Environics Inc Method for Removing Nitric Oxide from Combustion Gases

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2492167A (en) * 1943-06-01 1949-12-27 Socony Vacuum Oil Co Inc Process of forming alumina-containing gel beads
DE1592108A1 (en) * 1964-06-26 1970-12-03 Grace W R & Co Process for the production of clay gels
DE1592098C3 (en) * 1965-12-13 1978-05-11 Engelhard Minerals & Chemicals Corp., Murray Hill, N.J. (V.St.A.) Process for the preparation of spherical alumina particles
JPS4933321B1 (en) * 1970-12-07 1974-09-06
US3864461A (en) * 1972-08-29 1975-02-04 Laporte Industries Ltd Process for the production of alumina
JPS5072897A (en) * 1973-10-31 1975-06-16
US3979334A (en) * 1975-04-16 1976-09-07 Universal Oil Products Company Manufacture of spheroidal alumina particles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1958710A (en) * 1933-03-23 1934-05-15 Paul S Moyer Colloidal aluminum hydroxide and method of making the same
FR1267749A (en) * 1960-09-21 1961-07-21 Nalco Chemical Co Process for the preparation of an alumina catalyst support and resulting products
FR1414641A (en) * 1963-12-06 1965-10-15 Grace W R & Co Improved process for the preparation of alumina gels by atomization and alumina gels obtained by this process
US3520654A (en) * 1963-12-06 1970-07-14 Grace W R & Co Process for the preparation of low density alumina gel
DE2302724A1 (en) * 1972-01-19 1973-08-09 Grace W R & Co Continuous porous alumina prodn - by slurrying solns of sodium aluminate and aluminium sulphate
US3864451A (en) * 1973-08-16 1975-02-04 Environics Inc Method for Removing Nitric Oxide from Combustion Gases

Also Published As

Publication number Publication date
JPH0152328B2 (en) 1989-11-08
JPS53119800A (en) 1978-10-19
DE2812875A1 (en) 1978-10-05
FR2405900B1 (en) 1986-04-11
FR2405899B1 (en) 1985-10-04
DE2858783C2 (en) 1992-02-06
GB1603463A (en) 1981-11-25
GB1603464A (en) 1981-11-25
GB1603462A (en) 1981-11-25
GB1603461A (en) 1981-11-25
FR2405900A1 (en) 1979-05-11
DE2812875C2 (en) 1989-08-31

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