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| Number | Title | Issue Date |
| 8039658 | Removal of trace arsenic impurities from triethylphosphate (TEPO) A method of removing trace levels of arsenic-containing impurities from raw triethylphosphate (TEPO) is disclosed. The method uses adsorption, or adsorption followed by a flash distillation. The method comprises contacting raw triethylphosphate (TEPO) with an adsorb... | 10/18/2011 |
| 7071347 | Benzofuranone stabilization of phosphate esters A method for decolorizing and stabilizing alkylphenyl esters of phosphoric acid which comprises contacting the esters with an effective amount of a benzofuranone (e.g., is 5,7-di-t-butyl-3-(3,4 di-methylphenyl)3H-benzofuran-2-one) for a sufficient length of time to ... | 07/04/2006 |
| 6362358 | Process for the preparation of aromatic phosphonites and aromatic phosphinites and the products made by the process thereof A novel process is described for preparing phosphonites or phosphinites by reacting a product of a Friedel-Crafts reaction with alcohols or phenols and separating off the byproducts formed. The novelty is the aftertreatment with a protic compound, or with... | 03/26/2002 |
| 6358895 | Fluid treatment process Non-aqueous functional fluids are treated to avoid degradation or to recondition degraded fluids by a process which comprises contacting the fluid with an anionic ion-exchange resin and subsequently removing water by vacuum dehydration. The fluids can be ... | 03/19/2002 |
| 5661117 | Regeneration of phosphate ester lubricating fluids A method of removing contaminated phosphate ester materials is provided. The method involves the use of an anionic resin and a polymeric sorbent. The contaminated phosphate ester material is passed into contact with the anionic resin and optionally the so... | 08/26/1997 |
| 5608099 | Process for the recovery of tributyl phosphate from spent hydraulic oils A process for the recovery by distillation of tributyl phosphate (TBPO) from spent hydraulic oils, which are employed particularly in aircraft used for civilian air traffic.... | 03/04/1997 |
| 5306840 | Process for preparing pure L--glycerylphosphoryl-D-myoinositol and its salts A process for preparing pure L-alpha-Glycerylphosphoryl-D-Myoinositol and its salts consists of a) preparing the crude Na+ or K+ salt of L--Glycerylphosphoryl-D-Myoinositol, passing an aqueous solution of the salt through an acid resin in H form wh... | 04/26/1994 |
| 5258539 | Process for recovering a trialkyl phosphate ester from a trialkyl and aryl phosphate ester-based functional fluid A process for recovering a trialkyl phosphate ester from a phosphate ester-based functional fluid by treating the fluid with an alkoxide salt, and thereafter, distilling the fluid to recover the trialkyl phosphate ester essentially free of aryl-containing... | 11/02/1993 |
| 5214171 | Process for fractionating phosphatide mixtures Process for fractionating phosphatide mixtures into two or more fractions which are enriched in one or more of phosphatidyl choline (PC), phosphatidyl ethanolamine (PE), phosphatidyl inositol (PI) and phosphatidic acid (PA) by carrying out extraction step... | 05/25/1993 |
| 5208362 | Process for stabilizing organophosphorus compounds Organophosphorus compounds are stabilized against decomposition during and after recovery from their synthesis reaction mixtures by the addition to the synthesis reaction mixture of at least 0.5% by weight of an acid scavenger, based on the weight of the ... | 05/04/1993 |
| 5176904 | Alkali metal zinc monoalkylphosphate, particles thereof, process for preparing the same, and cosmetic containing the same An alkali metal monoalkylphosphate having a saturated or unsaturated straight-chain or branched hydrocarbon group having from 8 to 32 carbon atoms is described; also described is a process for preparing particles of said alkali metal zinc monoalkylphospha... | 01/05/1993 |
| 5082602 | Process and apparatus for regenerating spent reprocessing extraction solvent Cations and anions contained as impurities in a spent organic solvent can be removed by an alkaline aqueous solution passing through inside of hydrophobic porous membrane such as hollow fibers for capturing anions and by an acidic aqueous solution passing... | 01/21/1992 |
| 4897502 | Process for making solid polyhalotriaryl phosphate esters A process is provided for making halogen-substituted triaryl phosphate esters which are normally solid under ambient conditions. The process comprises reacting a halogenated phenol with phosphorus oxychloride in the presence of a magnesium chloride cataly... | 01/30/1990 |
| 4874883 | Process for the production and isolation of monoalkyl phosphoric acid esters In the production of monoalkylphosphoric acid esters, at least one fatty alcohol or mixtures of fatty alcohols containing from 8 to 18 carbon atoms and preferably from 12 to 14 carbon atoms in a straight chain is/are reacted with a 0.2 to 2 molar excess o... | 10/17/1989 |
| 4866193 | Purification of phosphorous acid esters Process for the purification of phosphoric acid partial ester mixtures in which, after the addition of a basic, non-volatile inorganic or organic compound, the unreacted fatty alcohol is directly removed from the partial ester mixture by distillation.... | 09/12/1989 |
| 4835299 | Process for purifying tertiary organophosphites A process for purifying tertiary organophosphites by removing secondary organophosphites therefrom.... | 05/30/1989 |
| 4808742 | Method for removing acids from organophosphate functional fluids A method for reducing the acidity and moisture content of used organophosphate functional fluids. The used functional fluid is contacted with a solid composite adsorbent and then separated from the adsorbent. The composite adsorbent is preferably a powder... | 02/28/1989 |
| 4741857 | Method of purifying neutral organophosphorus extractants A method for removing acidic contaminants from neutral mono and bifunctional organophosphorous extractants by contacting the extractant with a macroporous cation exchange resin in the H+ state followed by contact with a macroporous anion excha... | 05/03/1988 |
| 4739092 | Process for producing phosphoric ester salt of high purity A phosphoric ester salt of high purity is produced by converting a phosphoric ester in a mixture containing the phosphoric ester and one or more nonionic compounds into a phosphoric ester salt by using a basic compound, and extracting nonionic compounds f... | 04/19/1988 |
| 4375437 | Method of removing dioxane from phosphate ester surfactants Dioxane contaminant is removed from a phosphate ester surfactant having a chain of repeating ethyleneoxy units and containing residual phosphoric acid by means of a process which involves mixing the phosphate ester surfactant with a sufficient quantity of... | 03/01/1983 |
| 4276235 | Method for purifying bidentate organophosphorous compounds Bidentate organophosphorous compounds are purified of undesirable impurities by contacting a solution of the compounds with a mercuric nitrate solution to form an insoluble mercuric bidentate compound which precipitates while the impurities remain in solu... | 06/30/1981 |
| 4264534 | Process for removing soluble metallic salts from a phosphate ester functional fluid and reclamation of said fluid A process is provided for removing soluble metallic salts, such as calcium, copper, zinc, magnesium, tin, iron, or mixtures thereof, from a phosphate ester functional fluid. The process comprises contacting the functional fluid with an effective amount of... | 04/28/1981 |
| 4227972 | Process for recovering phosphate ester type hydraulic fluids from industrial waste liquids Disclosed herein is a process for recovering a phosphate ester type hydraulic fluid from a waste liquid containing water, organic solvents and other impurities, such as polychlorinated biphenyls (PCB). After filtering to remove particulate matter, a heavy... | 10/14/1980 |
| 4209471 | Process for the purification of O,O-di(lower)alkyldithiophosphoric acids A liquid-liquid extraction method for recovering O,O-di(lower)alkyldithiophosphoric acid of increased purity from a crude mixture in which it is contained comprises intimately contacting said mixture with an acidic aqueous solution to form two liquid phas... | 06/24/1980 |
| 4205023 | Process for removing soluble metallic salts from a phosphate ester functional fluid A process is provided for removing soluble metallic salts, such as calcium, copper, zinc, magnesium, tin, iron, or mixtures thereof, from a phosphate ester functional fluid. The process comprises contacting the functional fluid with an effective amount of... | 05/27/1980 |
| 4203933 | Method of purifying triaryl phosphate A method of purifying triaryl phosphate to be used as electrical insulating oil, comprising a first step of washing the phosphate with the aqueous solution of alkali, a second step of diluting the phosphate with aromatic insulating oil, a third step of tr... | 05/20/1980 |
| 4096209 | Phosphorylated secondary butylated phenol/phenol ester mixtures Phosphorylated alkylated phenol/phenol ester mixtures in which the weight ratio of the alkyl moiety to the phenol moiety ranges from 0.05 to about 0.65, and the number of carbon atoms per alkyl moiety ranges from 3 to 16, preferably from 3 to 12, which mi... | 06/20/1978 |
| 4093680 | Phosphorylated tertiary butylated phenol/phenol ester reaction mixtures Phosphorylated alkylated phenol/phenol ester mixtures in which the weight ratio of the alkyl moiety to the phenol moiety ranges from 0.05 to about 0.63, and the number of carbon atoms per alkyl moiety ranges from 3 to 16, preferably from 3 to 12, which mi... | 06/06/1978 |
| 4092378 | Method of refining phosphate-ester fluids A process of refining phosphate-ester fluids includes the steps of contacting the fluid with a source of saturated, straight-chain hydrocarbon material and subsequently splitting the mixture by the introduction of water. Organic contaminants originally pr... | 05/30/1978 |
| 4051202 | Method for separating mono- and di-octylphenyl phosphoric acid esters A method for separating mono-octylphenyl phosphoric acid ester and di-octylphenyl phosphoric acid ester from a mixture thereof comprises reacting the ester mixture with a source of lithium or sodium ions to form a mixture of the phosphate salts; contactin... | 09/27/1977 |
| 4051203 | Method for purifying bidentate organophosphorus compounds Bidentate organophosphorus compounds useful for extracting actinide elements from acidic nuclear waste solutions are purified of undesirable acidic impurities by contacting the compounds with ethylene glycol which preferentially extracts the impurities fo... | 09/27/1977 |
| 3996341 | Process for purifying trioctyl phosphate and use therefor Process for purifying trioctyl phosphate containing emulsifier impurities comprising alkali metal salts of dioctyl phosphoric acid and monooctyl phosphoric acid by contacting the trioctyl phosphate with a mineral acid to neutralize the emulsifier impuriti... | 12/07/1976 |
| 3945891 | Distillation process for purification of triaryl phosphate esters Crude phosphate ester products resulting from the phosphorylation of phenol, lower alkyl phenols and mixtures of same are purified to prepare triaryl phosphates substantially free of unreacted phenols by the sequential steps of flash distillation and frac... | 03/23/1976 |
| 3931361 | Color improvement of phosphate esters A method for decolorizing and stabilizing alkylphenyl esters of phosphoric acid which comprises contacting the esters with an effective amount of a sodium salt selected from the group consisting of sodium dithionite and sodium formaldehyde sulfoxylate for... | 01/06/1976 |
| 3931365 | Color improvement of phosphate esters A method for decolorizing and stabilizing alkylphenyl esters of phosphoric acid which comprises contacting the esters with an effective amount of a water soluble salt of a reduced form of sulfur for a sufficient length of time to decolorize and stabilize ... | 01/06/1976 |
| 3931367 | Color improvement of phosphate esters A method for decolorizing and stabilizing alkylphenyl esters of phosphoric acid which comprises contacting the esters with an effective amount of a stannous fatty acid salt for a sufficient length of time to decolorize and stabilize the esters against sub... | 01/06/1976 |
| 3931363 | Color improvement of phosphate esters A method for decolorizing and stabilizing alkylphenyl esters of phosphoric acid which comprises contacting the esters with an effective amount of a triorganoaluminum or organoaluminum hydride for a sufficient length of time to decolorize and stabilize the... | 01/06/1976 |
| 3931360 | Color improvement of phosphate esters A method for decolorizing and stabilizing alkylphenyl esters of phosphoric acid which comprises contacting the esters with an effective amount of a soluble nitrilotriacetate salt for a sufficient length of time to decolorize and stabilize the esters again... | 01/06/1976 |
