FR2695044A1 - Treatment of ester phosphate in hydraulic circuits - Google Patents
Treatment of ester phosphate in hydraulic circuits Download PDFInfo
- Publication number
- FR2695044A1 FR2695044A1 FR9210520A FR9210520A FR2695044A1 FR 2695044 A1 FR2695044 A1 FR 2695044A1 FR 9210520 A FR9210520 A FR 9210520A FR 9210520 A FR9210520 A FR 9210520A FR 2695044 A1 FR2695044 A1 FR 2695044A1
- Authority
- FR
- France
- Prior art keywords
- filter
- treatment
- fluid
- silica gel
- ester phosphate
- 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
Links
- 229910019142 PO4 Inorganic materials 0.000 title claims abstract description 6
- -1 ester phosphate Chemical class 0.000 title claims abstract description 6
- 239000010452 phosphate Substances 0.000 title claims abstract description 5
- 239000012530 fluid Substances 0.000 claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002253 acid Substances 0.000 claims abstract description 11
- 239000000741 silica gel Substances 0.000 claims abstract description 8
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 8
- 150000001875 compounds Chemical class 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000000499 gel Substances 0.000 claims 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 12
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 6
- 150000007513 acids Chemical class 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 150000005840 aryl radicals Chemical class 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/0075—Working-up used lubricants to recover useful products ; Cleaning synthetic oil based
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
- C10M175/0058—Working-up used lubricants to recover useful products ; Cleaning by filtration and centrifugation processes; apparatus therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
Procédé de traitement de fluide à base d'ester-phosshate d'un circuit hydraulique.Fluid treatment process based on ester-phosshate of a hydraulic circuit.
La présente invention concerne un procédé de traitement des fluides difficilement inflammables à base d'ester-phosphate. The present invention relates to a process for treating hardly flammable fluids based on phosphate ester.
Les fluides sont utilisés dans les circuits hydrauliques de régulation ou de graissage. The fluids are used in hydraulic regulation or lubrication circuits.
Ces fluides sous l'action de la chaleur et de l'eau venant de l'humidité de l'air se décomposent en acide phosphorique ou en composés d'ester-phosphate à caractère acide. Ces acides et composés sont nocifs car ils attaquent les parties sensibles des circuits de régulation et réduisent notablement la durée de vie du fluide en service. These fluids under the action of heat and water coming from the humidity of the air decompose in phosphoric acid or in ester-phosphate compounds with acid character. These acids and compounds are harmful because they attack sensitive parts of the regulation circuits and significantly reduce the service life of the fluid in service.
Pour régénérer ces fluides on utilise des filtres munis d'un produit qui piège l'acide phosphorique et ses composés. To regenerate these fluids, filters are used provided with a product which traps phosphoric acid and its compounds.
On utilise notamment de la terre à foulon ou de l'alumine. In particular, fuller's earth or alumina are used.
Toutefois la terre à foulon comporte des impuretés sous forme de carbonates de calcium et de magnésium difficiles à enlever et qui forment avec l'acide phosphorique et ses composés des phosphates de Mg et de Ca qui ensuite se déposent. However, fuller's earth contains impurities in the form of calcium carbonates and magnesium which are difficult to remove and which form, with phosphoric acid and its compounds, phosphates of Mg and Ca which then deposit.
Ces dépôts sont très nocifs pour les circuits hydrauliques, car ils peuvent accasionner le blocage des servo-mécanismes. These deposits are very harmful to the hydraulic circuits, as they can cause blockage of the servo-mechanisms.
L'alumine du commerce pour sa part présente l'inconvénient de contenir du sodium qui forme avec l'acide phosphorique du phosphate de sodium conduisant également à la formation de dépôts insolubles. Commercial alumina, on the other hand, has the drawback of containing sodium which, with phosphoric acid, forms sodium phosphate, also leading to the formation of insoluble deposits.
Le procédé selon l'invention est caractérisé en ce qu'on utilise du gel de silice. The method according to the invention is characterized in that silica gel is used.
La présente invention va maintenant être décrite plus en détail en se référant à un mode de réalisation particulier cité à titre d'exemple non limitatif et représenté sur la figure du dessin annexé. The present invention will now be described in more detail with reference to a particular embodiment cited by way of nonlimiting example and shown in the figure of the accompanying drawing.
La figure 1 représente une installation de traitement d'un fluide difficilement inflammable à base d'esterphosphate. FIG. 1 represents an installation for treating a hardly inflammable fluid based on esterphosphate.
Le fluide contenu dans la cuve 1 est envoyé dans un dispositif 2 de déshydratation. The fluid contained in the tank 1 is sent to a device 2 for dehydration.
Ce dispositif 2 comporte une matière absorbante retenant l'eau. This device 2 comprises an absorbent material retaining water.
La sortie du dispositif 2 est reliée à l'entrée d'un dispositif de régénération 3 muni de gel de silice. The output of the device 2 is connected to the input of a regeneration device 3 provided with silica gel.
Le dispositif 3 est suivi d'un filtre mécanique 4 servant a empêcher un éventuel largage du gel de silice. The device 3 is followed by a mechanical filter 4 used to prevent any release of the silica gel.
La sortie 5 du filtre 4 est renvoyée vers la cuve. The outlet 5 of the filter 4 is returned to the tank.
Une pompe hydraulique 6 sert à mettre en mouvement le fluide. A hydraulic pump 6 is used to set the fluid in motion.
lie filtre mécanique 4 est muni d'un indicateur d'encrassement à contact 7 permettant de surveiller la perte de charge. The mechanical filter 4 is provided with a contact fouling indicator 7 making it possible to monitor the pressure drop.
Des manomètres 8 sont disposés en avant de chaque dispositif de filtrage 2, 3, 4. Pressure gauges 8 are arranged in front of each filter device 2, 3, 4.
L'ensemble du système de traitement est équipé d'une soupage de protection 9 disposée en parallèle sur les dispositifs de filtrage et ceux-ci sont munis de robinets de vidange 10 et de purgeurs d'air 11. The entire treatment system is fitted with a protective valve 9 arranged in parallel on the filtering devices and these are fitted with drain valves 10 and air vents 11.
Le produit de traitement utilisé est une silice amorphe sous forme de poudre, de caractéristiques générales:
pureté en silice (Si02) > 99%
caractère chimique neutre (pH pour une suspension
dans l'eau à 10% : 7 + 0,5)
Granulométrie entre 50 et 500 ym
o
porosité 60 A
Les fluides difficilement inflammables à base d'esterphosphate ont pour formule chimique générale
purity of silica (Si02)> 99%
neutral chemical character (pH for a suspension
in water at 10%: 7 + 0.5)
Grain size between 50 and 500 ym
o
porosity 60 A
Hard-flammable esterphosphate fluids have the general chemical formula
Ar, Ar', Ar" étant des radicaux d'aryle. Ar, Ar ', Ar "being aryl radicals.
En fonctionnement, en présence d'eau et de chaleur les radicaux d'aryle par dégradation hydrolytique ou thermique sont remplacés par des ions d'hydrogène (H) en générant des esters-phosphates à caractère d'acide ou de l'acide phosphorique. Les réactions de dégradation hydrolytique et thermique sont auto-catalytiques; les composés acides formés contribuent à l'accélération du processus de réaction. In operation, in the presence of water and heat, the aryl radicals by hydrolytic or thermal degradation are replaced by hydrogen ions (H) by generating phosphate esters of acid or phosphoric acid character. The hydrolytic and thermal degradation reactions are auto-catalytic; the acid compounds formed contribute to the acceleration of the reaction process.
En faisant circuler le fluide à travers le filtre (genre filtre à chaussette) contenant le gel de silice, l'acide phosphorique et ses composés se trouvent bloqués par adsorption. Cette action d'adsorption due à la large surface spécifique de la silice permet une rétention physique des composés acides tout en assurant une décoloration partielle du fluide en service. By circulating the fluid through the filter (such as a sock filter) containing the silica gel, the phosphoric acid and its compounds are blocked by adsorption. This adsorption action due to the large specific surface area of the silica allows physical retention of the acid compounds while ensuring partial discoloration of the fluid in service.
L'élimination de l'eau et des composés acides permet de maintenir un indice d'acide faible du fluide en service sans que les composés solides nocifs soient générés. Removal of water and acidic compounds helps maintain a low acid number of the fluid in service without harmful solid compounds being generated.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9210520A FR2695044B1 (en) | 1992-09-03 | 1992-09-03 | Process for treating phosphate ester-based fluid in a hydraulic circuit. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9210520A FR2695044B1 (en) | 1992-09-03 | 1992-09-03 | Process for treating phosphate ester-based fluid in a hydraulic circuit. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2695044A1 true FR2695044A1 (en) | 1994-03-04 |
| FR2695044B1 FR2695044B1 (en) | 1994-11-04 |
Family
ID=9433176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9210520A Expired - Fee Related FR2695044B1 (en) | 1992-09-03 | 1992-09-03 | Process for treating phosphate ester-based fluid in a hydraulic circuit. |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2695044B1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE717999C (en) * | 1936-07-18 | 1942-02-27 | Ig Farbenindustrie Ag | Process for purifying tricresyl phosphate |
| FR974617A (en) * | 1942-01-07 | 1951-02-23 | Nantaise D Electricite Soc | Activated carbon regeneration process for insulating oils and turbine oils |
| US3996341A (en) * | 1975-04-30 | 1976-12-07 | Fmc Corporation | Process for purifying trioctyl phosphate and use therefor |
| EP0077102A2 (en) * | 1981-10-08 | 1983-04-20 | Stauffer Chemical Company | Reclamation of organophosphate fluids |
| EP0224632A1 (en) * | 1985-12-06 | 1987-06-10 | Leybold Aktiengesellschaft | Process and apparatus for the purification of hydrogen-free fluorized lubricants |
-
1992
- 1992-09-03 FR FR9210520A patent/FR2695044B1/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE717999C (en) * | 1936-07-18 | 1942-02-27 | Ig Farbenindustrie Ag | Process for purifying tricresyl phosphate |
| FR974617A (en) * | 1942-01-07 | 1951-02-23 | Nantaise D Electricite Soc | Activated carbon regeneration process for insulating oils and turbine oils |
| US3996341A (en) * | 1975-04-30 | 1976-12-07 | Fmc Corporation | Process for purifying trioctyl phosphate and use therefor |
| EP0077102A2 (en) * | 1981-10-08 | 1983-04-20 | Stauffer Chemical Company | Reclamation of organophosphate fluids |
| EP0224632A1 (en) * | 1985-12-06 | 1987-06-10 | Leybold Aktiengesellschaft | Process and apparatus for the purification of hydrogen-free fluorized lubricants |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2695044B1 (en) | 1994-11-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |