http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4723036-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_33dafb5bbc2ec47ebcb7becbbe60f704 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-584 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-16 |
| filingDate | 1982-09-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1988-02-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_55aec1b79eb6e17959bfb8e2ef935842 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_00bffa30a0a5c5a7ffc0058ef7840410 |
| publicationDate | 1988-02-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-4723036-A |
| titleOfInvention | Process for producing propylene glycol monoacetate |
| abstract | There is provided a process for producing propylene glycol monoacetate which comprises the steps of (I) hydroformylating vinyl acetate with a gaseous mixture of hydrogen and carbon monoxide in an organic solvent in the presence of a substantially water-insoluble rhodium complex and a tri-substituted phosphine to form alpha -acetoxypropionaldehyde, (II) subjecting at least part of the reaction mixture obtained in step (I) to extraction with an aqueous medium to obtain an aqueous layer containing alpha -acetoxypropionaldehyde and an extraction residue containing the catalyst components, and recycling the extraction residue to the hydroformylation step (I), (III) contacting the aqueous layer containing alpha -acetoxypropionaldehyde obtained in step (II) with a carboxylic acid ester of general formula (A) ClH2l+1COOCmH2m+1(A) wherein l is an integer of 0 to 4; m is an integer of 1 to 5; and the sum of l and m is 3 to 5, or a dicarboxylic acid ester of general formula (B) ROOC(CH2)nCOOR'(B) wherein R and R' each is an alkyl group of 2 to 3 carbon atoms; and n is an integer of 0 to 2 to thereby separate alpha -acetoxypropionaldehyde extractively from the aqueous layer, and (IV) hydrogenating the alpha -acetoxypropionaldehyde contained in the extract layer as obtained in step (III) in liquid phase in the presence of a Raney nickel or modified Raney nickel catalyst under conditions such that the concentration of alpha -acetoxypropionaldehyde in the reaction mixture does not exceed 0.1 mole per liter. Further provided is an improved process for hydrogenating alpha -acetoxypropionaldehyde which is advantageously employable in the above step (IV). |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2011075905-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5344993-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5256827-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105585433-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105585433-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105435786-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105435786-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6037506-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1776328-B1 |
| priorityDate | 1981-10-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 109.