http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1238317-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5c24684033fba97d1ad845ce453a57e3 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B11-193 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B11-193 |
| filingDate | 1985-05-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1988-06-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5e9620d0561602e89f29ed43ffcee468 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1f098dabfa132d4351a7f2499ebdb6d8 |
| publicationDate | 1988-06-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1238317-A |
| titleOfInvention | Preparation of water-soluble mixed cellulose ethers |
| abstract | Abstract The process for preparing water-soluble mixed cellulose ethers proceeds in the following steps: a) alkalization of the cellulose, b) etherification of the alkali cellulose in the presence of a base, using at least one etherifying agent which requires, for the reaction with cellulose, a catalytic and sub-stoichiometric quantity of a base, and c) after increasing the quantity of base, further etherifi-cation of the cellulose ether so prepared, using at least one etherifying agent which requires, for the reaction with cellulose, an at least stoichiometric quantity of a base or a catalytic and sub-stoichiometric quantity of a base, increased over the quantity used in (a), with at least one inert organic solvent being used as a dis-persing auxiliary in at least one of the steps and water being present in all steps. The organic solvent used is dimethyl ether, which either is used alone or in a mixture with dimeth-oxyethane, an alkanol, an alkanediol and/or an alkoxyalkanol. The process serves, in particular, for the preparation of methyl-hydroxyethyl cellulose or methyl-hydroxypropyl cellulose. |
| priorityDate | 1984-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 57.