http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-0184734-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1b1881bd8bc9460e27f5a93d2ee73374 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B67-0075 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B67-0083 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B37-00 |
| filingDate | 1996-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1999-04-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f7d3f80f323562435010ebc55ca24e20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5e9715b20a25eca9963612059bec09d5 |
| publicationDate | 1999-04-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-0184734-B1 |
| titleOfInvention | Highly concentrated storage of yellow azo and azoxystilbene dyestuffs - Method for producing aqueous solutions of stability |
| abstract | 1. Fields of invention described in the claimsn n n The present invention relates to a process for the preparation of azo and azoxystilbene dyes.n n n 2. Technical Challenges to be Solved by the Inventionn n n Since the organic solvent does not remain in the dye after the production, the present invention can prevent contamination of the wastewater due to the dyeing, and it is possible to prevent the deterioration of the productivity in the desalting method by the conventional membrane separation, High concentration storage stability of azo-and azo-stilbene dyes having excellent stability due to no precipitation or gel formation even when stored for a long period of time can be obtained by solving the problems of lowering the yield and obtaining a high concentration of liquid dye. And a method for producing the same.n n n 3. The point of the solution of the inventionn n n In the present invention, the phase separation of the solid water-insoluble alkylamine salt obtained by subjecting 4-nitrotoluene-2-sulfonic acid to self-condensation reaction using water as a reaction solvent, Characterized in that an alkanolamine or an alkylene glycol is added as an organic catalyst after completion of the self-condensation reaction of 4-nitrotoluene-2-sulfonic acid or after acid salting, in order to accelerate the storage of the azo and azoxystilbene dyes. -Stability aqueous solution of the present invention.n n n 4. Important Uses of the Inventionn n n The highly concentrated storage-stable aqueous solution of the azo and azoxystilbene dyes of the present invention has utility as a yellow dye. |
| priorityDate | 1996-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 53.