http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102030847-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5cab5aa23bd3adc532b549fa25e60057 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e7bf0a4848ba16ca68967b57e5def4ed http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_53b4d53983adbf56dd0e7d0bf96f8ce5 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F16-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F18-08 |
| filingDate | 2009-09-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2014-08-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_437af61cd99901d3c5d8fb5a0be5491d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4e0ce20b268d0e39e3850ec28b3a31cd http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_aa8f1d8846ff4ef66076eb53b2729def http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4e49e50428e4e3ccc034a3f6a22a6308 |
| publicationDate | 2014-08-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102030847-B |
| titleOfInvention | Method for preparing low ash polyvinyl alcohol |
| abstract | The invention relates to a method for preparing low ash polyvinyl alcohol which is obtained by catalyzing polyvinyl acetate with alkali for alcoholysis reaction. The method is characterized in that a utilized catalyst is tetramethylammonium hydroxide or tetraethylammonium hydroxide and inorganic alkali. In the invention, the polyvinyl acetate is catalyzed by utilizing organic alkali instead of inorganic strong alkali adopted in the prior art for the alcoholysis reaction, and the low ash polyvinyl alcohol can be prepared on the basis of not changing the original process; polyvinyl acetate reaction solutions with different polymerization degrees can be utilized to prepare a series polymerization degrees of polyvinyl alcohol with the ash not more than 0.1%, therefore, different requirements can be satisfied. The method has quick reaction speed and simple process and is easy to realize industrialization at the same time. |
| priorityDate | 2009-09-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.