http://rdf.ncbi.nlm.nih.gov/pubchem/patent/RU-2123494-C1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d4f4080104195381c76f619ae486b62f http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c92991db91bae6d2d5d715e241037fc3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b584ec0a9b6aa83dad4c361eda81db2d http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_66a880064a5db0057f0846c34a3b1e65 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_da037aee338c05226aa992826abe495a http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_99d86252c21aaa369da2a2e0d4762cbd |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-22 |
| filingDate | 1996-08-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1998-12-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f6f8d387ace62dd00e0b52faa9739186 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8d0bad385d3fd92915c8104637cfafc3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1bcca8f2e40a8153f3c9aba2f76bbb19 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9fa7214fd91b2c62c7afa30c4d6ee042 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_82f32fdc0c3cf25616ca4871421a2a1a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_97a4b8936970641fdb879bb288eb2243 |
| publicationDate | 1998-12-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | RU-2123494-C1 |
| titleOfInvention | Method of synthesis of disulfomaleic anhydride |
| abstract | FIELD: organic chemistry and technology. SUBSTANCE: at the first stage maleic anhydride and liquid sulfur trioxide taken at molar ratio 1:1.1 are mixed at cooling and then heated to 35 C. Sulfonation reaction is exothermic and results to instantaneous increase of reaction product temperature that should be maintain at the range 35-50 C by cooling and stirring for 12-15 min. After exothermic process termination reaction mass temperature is decreased and therefore reaction mass is heated to 60 C and kept for 5.5 h. Obtained sulfomaleic anhydride is subjected for repeated sulfonation with sulfur trioxide at molar ratio 1:1.1 at cooling followed by heating to 35 C that results to exothermic reaction that is maintained at the temperature range 35-45 C by cooling and stirring for 6-10 min and final cooling and the following heating to 65-75 C and reaction mass keeping for 4-5 h. Synthesized disulfomaleic anhydride can be used as raw for synthesis of surface-active substances and the end product can be used also in machine building, electronic and electrochemical industries. EFFECT: high quality of the end product, high and stable yield. 3 cl, 2 tbl |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0170638-A1 |
| priorityDate | 1996-08-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.