http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0099981-B1
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C59-153 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-333 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-34 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-475 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C59-305 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-333 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-708 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-67 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C59-153 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-09 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C27-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C27-00 |
| filingDate | 1983-06-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1986-01-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1986-01-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0099981-B1 |
| titleOfInvention | Process for the preparation of glyoxylic acid and glyoxylic acid derivatives |
| abstract | 1. Process for the preparation of alkyl glyoxylate semi-acetals of the general formula see diagramm : EP0099981,P7,F1 in which R denotes an alkyl radical with 1 to 10 C atoms and R1 an alkyl radical with 1 to 4 C atoms, by ozonolysis of a maleic acid derivative followed by catalytic hydrogenation of the ozonolysis products, characterised in that a) a dialkyl maleate with 1 to 10 C atoms in the alkyl radical is dissolved in an aliphatic alcohol of the formula R1 OH, wherein R1 has the abovementioned meaning, and is reacted at temperatures of - 80 to + 20 degrees C with an equivalent amount of ozone, after which b) the resulting peroxide-containing solution is fed continuously into a suspension of the hydrogenation catalyst in the alcohol of the formula R1 OH, used in the ozonolysis in stage a), R1 having the abovementioned meaning, at a rate of addition such that over the entire course of the hydrogenation a peroxide content of at most 0.1 mole/l is set up, and maintained, in the hydrogenation reactor, the hydrogenation being carried out at pH 2 to pH 7 at temperatures of 15 degrees C to 45 degrees C under a pressure of 1 to 20 bar. |
| priorityDate | 1982-07-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 72.