| Patents for C01B 25 - Phosphorus; Compounds thereof (12,526) |
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| 09/22/1981 | US4291005 Settling out suspended solids in phosphoric acid product solutions |
| 09/22/1981 | CA1109233A1 Removal of phosphine contaminant from carbon monoxide gas mixtures |
| 09/16/1981 | EP0035798A2 Inorganic pigment and process for its production |
| 09/15/1981 | US4289739 Method of producing crystalline sodium aluminum phosphate |
| 09/15/1981 | US4289609 Process for removing solid organic materials and other impurities from wet-process phosphoric acid |
| 09/09/1981 | EP0035201A1 Process for producing phosphorous pentachloride |
| 09/09/1981 | EP0035100A1 Rotary drum for the transformation of sodium orthophosphates into tripolyphosphates |
| 09/08/1981 | US4288372 Production of maleic anhydride |
| 09/01/1981 | US4287165 By reducing lead(ii) phosphate in hydrogen |
| 08/25/1981 | US4285924 Separation of acids |
| 08/25/1981 | US4285921 6107845x |
| 08/25/1981 | US4285920 Solvent extraction process for preparing purified phosphoric acid and sodium phosphate salts |
| 08/18/1981 | US4284614 Process for production of high purity phosphoric acid from high alumina phosphate pebble rock |
| 08/18/1981 | US4284613 Reacting with ammonia under pressure |
| 08/18/1981 | US4284606 Extraction |
| 08/18/1981 | US4284601 Surfactant foams and their use |
| 08/18/1981 | US4284469 Method and apparatus for concentrating a liquid |
| 08/11/1981 | US4283307 Catalyst structure for the partial oxidation of n-butane to produce maleic anhydride |
| 08/11/1981 | CA1106616A1 Process for the recovery of uranium from wet-process phosphoric acid |
| 08/05/1981 | EP0033166A2 Apparatus for reacting or dissolving a particulate solid and a liquid; apparatus and process for the production of phosphoric acid |
| 08/04/1981 | US4282192 Process for producing a calcium sulfate product containing low amounts of radium |
| 08/04/1981 | CA1106137A1 Process and apparatus for manufacturing posphoric acid |
| 07/28/1981 | US4280928 Catalyst compositions and their use for the preparation of methacrolein |
| 07/28/1981 | US4280904 High capacity folded moving bed ion exchange apparatus and method for treating phosphoric acid |
| 07/28/1981 | CA1105672A1 Process for preparing phosphate products |
| 07/22/1981 | EP0032454A2 Method and apparatus for concentrating a liquid |
| 07/22/1981 | EP0032407A2 A process for the production of phosphoric acid |
| 07/21/1981 | US4279878 Process for freeing phosphoric acid from organic contaminants |
| 07/21/1981 | US4279877 Oxidative control of post precipitation in phosphoric acid |
| 07/21/1981 | US4279876 Conversion of extraction residues originating from phosphoric acid decontamination to solid deposition products |
| 07/21/1981 | CA1105387A1 Single layer denture-cleansing tablet for self acting cleansing of dentures |
| 07/14/1981 | US4278648 Method of improving siliceous filter aid dispersion in wet process orthophosphoric acid production systems |
| 07/14/1981 | US4278647 Production of phosphorous acid |
| 07/14/1981 | CA1104832A1 Process for extracting phosphoric acid and metal values from phosphate rock |
| 07/14/1981 | CA1104831A1 Extraction of valuable constituents from minerals with liquid reagents |
| 07/14/1981 | CA1104793A1 Removal of phosphine from phosphine-contaminated carbon monoxide gas streams |
| 07/14/1981 | CA1104790A1 Solid ammonium polyphosphate compositions and method for the manufacture thereof |
| 07/08/1981 | EP0031803A2 Method of producing crystalline sodium aluminum phosphate |
| 07/08/1981 | EP0031793A2 Process for producing phosphoric acid during which uranium in a recoverable state is obtained |
| 07/08/1981 | EP0031696A1 Process for the preparation of vanadium phosphorus catalysts, catalysts so prepared, use of these catalysts for the production of maleic anhydride and maleic anhydride so produced |
| 07/08/1981 | EP0031460A2 Process for recovering uranium or its compounds from phosphoric acid |
| 07/08/1981 | EP0031428A1 Process for manufacturing finely divided, hardly soluble salts of oxyacids of phosphorus |
| 07/07/1981 | US4277455 Process for purifying phosphoric acid |
| 07/07/1981 | US4277454 Methods for the control of excessive corrosion in phosphoric acid circuits |
| 07/07/1981 | US4277448 Phosphoric acid process with high circulation rates |
| 07/01/1981 | EP0031223A1 Crystalline calcium sodium or lithium phosphate having an asbestos-like form, a process for its preparation and composites of organic polymeric material containing it |
| 07/01/1981 | EP0031222A1 Acicular, crystalline calcium metaphosphate, a method for its production, and composites of organic polymeric material containing it |
| 06/30/1981 | US4276273 Production of sodium polyphosphates |
| 06/30/1981 | US4276270 Start-up procedure in producing phosphoric acid by the hemihydrate process |
| 06/30/1981 | US4276116 Vacuum evaporation using heat from formation of sulfuric acid; cycles |
| 06/30/1981 | CA1104114A1 Method for preparing a catalyst and intermediate formed thereby |
| 06/30/1981 | CA1103887A1 Preparation of purified or condensed phosphoric acid |
| 06/23/1981 | US4275038 Process for treating loaded extractant from purification of phosphoric acid by extraction and recovering nutrients |
| 06/23/1981 | US4274879 Synthetic bone ash |
| 06/23/1981 | CA1103461A1 Process for recovering uranium from wet-process phosphoric acid |
| 06/23/1981 | CA1103423A1 Production of phosphoric acid |
| 06/17/1981 | EP0030487A1 Process for the purification of a wet-process phophoric acid |
| 06/16/1981 | US4273752 Thermal conversion of yellow phosphorus, ball milling, annealing, wet grinding |
| 06/16/1981 | CA1103227A1 Liquid membrane process for uranium recovery |
| 06/09/1981 | US4272496 Processing elemental phosphorus (P4) containing gas streams |
| 06/09/1981 | CA1102523A1 Continuous production of phosphine |
| 06/09/1981 | CA1102522A1 Production of phosphorus pentasulfide of predetermined reactivity |
| 06/02/1981 | US4271128 Apparatus for recovering alcoholic phosphoric acid solutions from acid phosphates |
| 06/02/1981 | CA1102119A1 Phosphorus furnace improvements |
| 05/27/1981 | EP0029132A1 Process for purifying wet-process phosphoric acid |
| 05/26/1981 | US4269814 Process for preparing crystalline ammonium dihydrogen phosphate |
| 05/20/1981 | EP0028744A1 Stabilized red phosphorus and process for producing it |
| 05/19/1981 | CA1101188A1 Treatment of phosphoric acid |
| 05/13/1981 | EP0028315A1 Process for the manufacture of magnesium phosphide |
| 05/12/1981 | US4267131 Method for intimate contacting of plural phases and phase contactor apparatus therefor |
| 05/05/1981 | US4265867 Preparation of dicalcium phosphate |
| 05/05/1981 | US4265866 Noncatalytic reaction of phosphine and hydrogen peroxide |
| 05/05/1981 | US4265865 By chlorination of phosphorus trichloride in the presence of a melt of the pentachloride |
| 05/05/1981 | US4265854 Process inhibiting the coalescence of flowable phosphorus pentachloride in closed containers |
| 05/05/1981 | US4265661 And phosphides, hollow container of encapsulant for reactants |
| 04/29/1981 | EP0027607A1 Process for producing a purified oxidation-stable inorganic acid |
| 04/29/1981 | EP0027484A1 Device for the production of phosphoric acid by the wet process |
| 04/28/1981 | US4264563 Added to a suspension of lime, heated to boiling to form a calcium fluosilicate compound |
| 04/28/1981 | CA1099899A1 Absorption process for fluoride compounds in gas mixes |
| 04/28/1981 | CA1099893A1 Sodium zirconium carbonate compound and the method of its preparation |
| 04/22/1981 | EP0027351A1 Oxidation catalysts and process for the preparation of methacrolein by vapour phase oxidation |
| 04/21/1981 | US4263265 Continuous precipitation of barium sulfate |
| 04/21/1981 | US4263262 Pyrolysis of organic matter in phosphate rock |
| 04/21/1981 | US4263234 Method of intimate contacting/separating of plural phases and phase contactor/separator apparatus therefor |
| 04/21/1981 | US4263148 Process for removing humic matter from phosphoric acid solutions |
| 04/21/1981 | CA1099694A1 Production of maleic anhydride from four-carbon hydrocarbons using catalysts |
| 04/21/1981 | CA1099486A1 Stabilized red phosphorus |
| 04/08/1981 | EP0026259A1 Process for the defluorination of phosphoric acid and phosphoric acid made thereby |
| 04/07/1981 | US4260668 Copper oxyphosphates |
| 04/07/1981 | US4260592 Manufacture of water-insoluble ammonium polyphosphate |
| 04/07/1981 | US4260591 Reaction of alkali metal ion, aluminum ion and phosphoric acid |
| 04/07/1981 | US4260584 Apparatus useful for wet process phosphoric acid production |
| 04/07/1981 | US4260414 Process for recovering and utilizing useful substances from molten metal produced during reduction treatment of steel slag |
| 04/01/1981 | EP0026090A2 Process for preparing hydroxyapatite, and filter cake, ceramic material and implant material comprising hydroxyapatite |
| 03/24/1981 | US4258022 Reacting phosphorus with alcohol, metal hydroxide in presence of surfactant |
| 03/24/1981 | US4258008 System for phosphoric acid production with decreased foaming |
| 03/24/1981 | US4258007 Ventilated, for reacting phosphate rock and sulfuric acid |
| 03/17/1981 | US4256718 Sodium zirconium carbonate compound and the method of its preparation |
| 03/17/1981 | US4256716 Process for treating loaded extractant from purification of phosphoric acid by extraction |
| 03/17/1981 | US4256570 Purification of phosphoric acid |