| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_90a13a78cc4dea6641d5cc7ffef73053 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y02P20-10 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-145
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-42
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-675
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C59-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-09
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-08 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-09
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-145
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C59-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-675
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-54 |
| filingDate |
2017-09-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6f4bb757f262b514dc1fc63cb2a7f831
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a03ff3bc2ac8951e22394156a657a87f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8b04d2430fc7eab3c4fe47debbaf880e |
| publicationDate |
2018-08-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
GB-2559641-A |
| titleOfInvention |
Process |
| abstract |
A process for the production of glycolic acid or a derivative thereof comprises: (a) reacting formaldehyde with carbon monoxide and water in a carbonylation reactor 5 in the presence of a sulfur catalyst, such that glycolic acid is formed; (b) recovering a first product stream comprising glycolic acid, impurities and a sulfur species in the carbonylation reactor 5; (c) passing the first product stream to an esterification reactor 12 where it is subjected to esterification to form an alkylglycolate and wherein the esterification is catalysed by the sulfur species recovered in the first product stream; (d) recovering a second product stream comprising the alkylglycolate, sulfur species and impurities from the esterification reactor 12; (e) separating the sulfur species from the second product stream and recycling it to the carbonylation reactor 5 in step (a) to form a sulphur depleted second product stream; (f) separating the alkylglycolate from the sulphur depleted second product stream in a distillation zone 19; (g) recovering the alkylglycolate and converting the alkylglycolate to glycolic acid in a hydrolysis reactor 23. |
| priorityDate |
2016-09-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |