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| Number | Title | Issue Date |
| 7241885 | Process for the isolation of crystalline imipenem The present invention relates to a cost effective and industrially advantageous process for the preparation of imipenem of high purity comprising the steps of treating an aqueous solution containing imipenem with an organic solvent, wherein the imipenem is not lyoph... | 07/10/2007 |
| 7078534 | Process for the preparation of crystalline N-formimidoyl thienamycin monohydrate (imipenem monohydrate) The present invention relates to a cost effective and commercially viable process for the preparation of crystalline N-formimidoyl thienamycin monohydrate (Imipenem monohydrate) of Formula I. ... | 07/18/2006 |
| 6018067 | Process of purifying dihydrocarbylchlorothiophosphates Crude dihydrocarbylchlorothiophosphate product contaminated with dihydrocarbylpolysulfide and/or dihydrocarbylchlorophosphate is upgraded by treating the crude product with an aqueous hypochlorite solution, and separating an aqueous phase from the organic... | 01/25/2000 |
| 5955626 | Process of purifying dihydrocarbylchlorothiophosphates Crude dihydrocarbylchlorothiophosphate product contaminated with dihydrocarbylpolysulfide and/or dihydrocarbylchlorophosphate is upgraded by treating the crude product with chlorine followed by an aqueous solution of reducing agent, separating an aqueous ... | 09/21/1999 |
| 5550275 | Method of preparing diarylchlorophosphate A method of preparing diarylchlorophosphate comprising the step of reacting alkyldiarylphosphate represented by formula (1) and thionyl chloride in the presence of a catalyst: R1 O--P(O)(OAr)2 (1) (where R | 08/27/1996 |
| 5278331 | Waste treatment in dialkyl phosphorochloridothioate production An improvement in the process for making a dialkyl phosphorochloridothioate from P2 S5, alkyl alcohol and chlorine in which the desired product is separated from the reaction mixture by distillation, leaving an unstable, acidic resid... | 01/11/1994 |
| 5245069 | Process for the preparation of bis(aryl)-phosphorohalidates This invention relates to a novel process for preparing bis(aryl)phosphorohalidates which are useful in the synthesis of various enol phosphates. The process of this invention provides a means of producing a high-yield, high-purity product without the nee... | 09/14/1993 |
| 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 |
| 4415506 | Treating the residue from the production of phosphorochloridothionates The invention is a novel method of treating the distillation residue from the production of phosphorochloridothionates which comprises contacting the residue with a sufficient amount of a separating solution having a specific gravity of about 1.5, prefera... | 11/15/1983 |
| 4401605 | Process for scavenging sulfur monochloride from the reaction mixture from the chlorination of dialkyldithiophosphoric acid to dialkylthiophosphoric acid chloride There is contemplated in the production of an O,O-dialkyl-phosphorothioic acid chloride of the formula ##STR1## in which R is alkyl, wherein a chlorinating agent is reacted with a bis(thiophosphono) sulfide of the formula ##STR2## in which ... | 08/30/1983 |
| 4356130 | Treating the residue from the production of phosphorochloridothionates The invention is a novel method of treating the distillation residue from the production of phosphorochloridothionates which comprises contacting the residue with a sufficient amount of a separating solution having a specific gravity of about 1.5, prefera... | 10/26/1982 |
| 4354983 | Process for the purification of O,O-dialkylthionophosphoric acid chlorides Production of O,O-dialkylthionophosphoric acid chlorides of the general formula: ##STR1## in which R is an alkyl radical having from 1 to 6 carbon atoms, by reacting a dialkyldithiophosphoric with chlorine. A reactor is supplied with O,O-dialkyl... | 10/19/1982 |
| 4292139 | Method for inhibiting deposit formation in distillation units associated with separation and purification of alkyl phosphorochloridothioates Deposit formation in distillation units, particularly column reboiler units, associated with the separation and purification of dialkyl phosphorochloridothioates from a crude material containing oxygenated compound impurities, is inhibited by incorporatin... | 09/29/1981 |
| 4247490 | Process for the purification of dialkylphosphorochloridothioates A process for purification of dialkyl phosphorochloridothioate by contacting a crude material containing oxygenated phosphorus compound impurities with an alcohol and separating the product dialkyl phosphorochloridothioate from the reaction product, for e... | 01/27/1981 |
| 4159289 | Process for preparing dialkyl phosphorochloridothioates An improved process for the preparation of O,O-dialkyl phosphorochloridothioates in which distillation to recover substantially pure product is carried out in presence of a solubilizing or suspending agent, for example, liquid hydrocarbons, particularly a... | 06/26/1979 |
