http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-853982-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_03dc6935e7d9298370daeb8a430b664e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F7-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-141 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-46 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-141 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F7-28 |
| filingDate | 1957-03-18^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1960-11-16^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-853982-A |
| titleOfInvention | Production of alkyl, aryl and aralkyl esters of acids of trivalent phosphorus |
| abstract | Esters of acids of trivalent phosphorus having the formula P(OR)3, R1P(OR)2, R12P(OR), (HO)P(OR)2 or HOR1P(OR), wherein R is an aryl, aralkyl or alkyl group having at least 2 carbon atoms and R1 an aryl, aralkyl or alkyl group are prepared by the separate simultaneous addition of a phosphorus halide, R 3-he-n PX n, where X is chlorine, bromine or iodine and n is 2 or 3, and the calculated proportion of ammonia gas to at least the calculated proportion of an alcohol or phenol ROH, the addition being so regulated that the ammonia addition is completed in substantially the same time as the addition of the phosphorous halide, the reaction temperature being maintained at from-25 DEG C. to about 65 DEG C., with the limitation that for the preparation of neutral phosphites the temperture is maintained above 25 DEG C., and the pH at 7-8,5 for the preparation of neutral esters and 5,5-6,9 for acid esters. In a modification of this process for the production of acid esters, (HO)P (OR)2 and (HO)R1P(OR), the ammonia addition is completed in two-thirds or one-half, respectively of the time taken to add the phosphorous halide, the pH being maintained at 7-8,5 during the addition of the ammonia. An inert hydrocarbon solvent may be used. The required pH may be maintained by the use of proportioning pumps to add the reactants or by means of an electronic or chemical indicator, e.g. just basic to Methyl Red for pH7-8,5. The process may be operated in a continuous manner. The required amount of ammonia and the minimum required amount of hydroxy compound may be obtained from the following equations. <FORM:0853982/IV(b)/1> <FORM:0853982/IV(b)/2> <FORM:0853982/IV(b)/3> <FORM:0853982/IV(b)/4> <FORM:0853982/IV(b)/5> Examples describe the preparation of triethyl, triisopropyl, tributyl, triisooctyl, trioctyl, trinonyl and tridecyl phosphites, dimethyl, diethyl, dipropyl and diisopropyl hydrogen phosphites, diethyl methylphosphonite, dioctyl ethylphosphonite, dihexyl phenylphosphonite, diethyl octylphosphonite and butyl diethylphosphonite. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0787738-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0789027-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5698729-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4247448-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5734072-A |
| priorityDate | 1956-04-16^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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