http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1067513-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ac5186c395d7d1d225f7ce26c36b6587 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-487 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-487 |
| filingDate | 1976-09-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1979-12-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9a2c0279e053c779bfc2bb21db58193d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_de76a8be3a93da3a78d5af4151450f50 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2573635622e68d206f5888cea3129f0e |
| publicationDate | 1979-12-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1067513-A |
| titleOfInvention | Selectively separating oxalic, tartaric glyoxylic and erythronic acids from aqueous solutions containing the same |
| abstract | ABSTRACT OF THE DISCLOSURE Mixtures of oxalic, meso tartaric, glyoxylic and erythronic acids derived particularly from the oxidation of cellulose deriv-atives are separated from aqueous solutions in which they are contained and from each other by stepwise precipitation with cal-cium ion at controlled pH. The oxalic acid is precipitated as calcium oxalate at a pH of 0.9 to 2.0; the tartaric acid as cal-cium meso tartrate at a pH of 2.8 to 4.4; and the glyoxylic acid, as calcium glyoxylate at a pH of 4.5 to 5.4. After each preci-pitation the water insoluble precipitate is separated from the aqueous mixture in which it is contained. The relatively sol-uble erythronic acid remains in solution as a free acid, or in the form of its calcium salt. |
| priorityDate | 1975-11-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 58.