http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-4038388-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b502fde933db1d6126d10bbcbddb83ea |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C01B33-38 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-32 |
| filingDate | 1990-12-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_228b3d663fde6407172dca32f33af4a2 |
| publicationDate | 1991-06-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-4038388-A1 |
| titleOfInvention | METHOD FOR THE HYDROTHERMAL PRODUCTION OF CRYSTALLINE SODIUM DISILICATE |
| abstract | Hydrothermal prodn. of crystalline sodium disilicate (Na20: SiO2 mol ration = 1:2) is carried out at elevated temp. and antagenous pressure in a pressure vessel by (a) heating quartz sand and caustic soda and/or an aq. soln. of amorphous sodium disilicate to at least 235 deg.C; and either (b) subjecting the reaction mixt. of 50-75 wt.% total solids concn. to opt. concn. and, during or immediately after cooling to 90-130 deg.C, re-addn. of (part of) the removed water amount, and then removing the crystalline sodium disilicate ppte. from the suspension; or (b') subjecting the reaction mixt. of over 75wt.% total solids concn. to opt. concn. to up to 100 wt.% total solids concn. and then cooling to obtain pptd. crystalline sodium disilicate as a solid. ADVANTAGE - The process allows single stage direct prodn. of fully crystalline, high purity sodium disilicate in the beta (low-temp) form, the purity being over 90% when step (b) is used and over 95% when step (b') is used. |
| priorityDate | 1989-12-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 31.