http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-201121930-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6c6d89fd8dd121a4c17ccf5a802e637e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C29-88 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C29-88 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C29-74 |
| filingDate | 2010-12-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c4a44686d33910c84a162c82a0e4a64d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a51abbadb1490b1f16ea88658935d5af http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f4bbaaee0ae9dc9ce77deb396efe6075 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b23e06edcba4479bf01c5131b258ea2e |
| publicationDate | 2011-07-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | TW-201121930-A |
| titleOfInvention | Trimethylolpropane color improvement |
| abstract | The present invention provides a process for improving the color of trimethylolpropane which comprises the steps of (a) supplying a crude, aqueous base solution of trimethylolpropane, containing color causing impurities, and having a pH of less than about 9; (b) contacting said base solution with an alkaline material for a period of time sufficient to increase the pH of said base solution to greater than 11 and at a sufficient temperature to allow the color causing impurities to react with said alkaline material; (c) cooling the resulting solution from step (b) for a sufficient period of time; (d) contacting said base solution of step (c) with an organic acid for a sufficient period of time to lower the pH thereof to less than about 9.5; (e) extracting the trimethylol-propane from said base solution of step (d) with an organic solvent; (f) separating the trimethylolpropane form said organic solvent; and (g) purifying said trimethylolpropane from step (f) to from a trimethylol-propane having a phthalic color of less than 0.20 and an acid wash color of less than 8. |
| priorityDate | 2009-12-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 69.