http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-508383-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1e70c0aeade92d7571d955d3b90ea06e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-12 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-12 |
| filingDate | 1937-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1939-06-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-508383-A |
| titleOfInvention | Improvements in or relating to the manufacture of glycollic acid |
| abstract | 508,383. Glycollic acid. DU PONT DE NEMOURS & CO., E. I. Dec. 29, 1937, No. 36031. Convention date, Dec. 31, 1936. [Class 2 (iii)] Glycollic acid is produced by reacting formaldehyde or a polymer thereof 'with carbon monoxide in the presence of water, preferably in the presence of an acid catalyst such as sulphuric, hydrochloric, phosphoric, formic- or glycollic acid or their acid salts or acid esters, or boron fluoride. The process may be effected at 5-1500 atmospheres and 50-350‹ C. The glycollic acid may be separated by distillation, preferably under reduced pressure, or by crystallization after separation of the catalyst and removal of excess water under reduced pressure. The process may be effected in an autoclave or continuously in counter-current, and the apparatus may be of glass or silica or lined with glass, porcelain, silver, chromium or stainless steel. In the examples sulphuric, hydrochloric, phosphoric, formic, and glycollic acids and boron fluoride are used as the catalysts, with various proportions of water and various temperatures and pressures. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8703999-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10329230-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2370715-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7498469-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8709376-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8765999-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8779214-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8466328-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9040748-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8829234-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111646895-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4128575-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8785686-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8829248-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8927766-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9227896-B2 |
| priorityDate | 1936-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 46.