| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_630b360599ea5cf4b5bcbc0c6c0a3e2d |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S8-937 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B67-0096
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B69-02 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B67-54
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B69-02 |
| filingDate |
1986-09-15^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1989-02-28^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ca4ec98a8c011e06171f468908b313d8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_737861e1b4561a6457076b3cd8b40fa7
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2de5502e9a21a7cfdbddfd4578fb8bc0 |
| publicationDate |
1989-02-28^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4808192-A |
| titleOfInvention |
Process for preparation of water soluble dyes containing lithium sulfonate group or ammonium sulfonate group by cation exchange, neutralization and reverse osmosis |
| abstract |
In accordance with this invention an aqueous solution of a water-soluble dye containing lithium sulfonate group or ammonium sulfonate group can be obtained by a very simple and economical process in such a way that an aqueous solution of a water-soluble dye containing sodium sulfonate group is fed to a packed column packed with acid type cation exchange resin (H-form) to form an aqueous solution of a dye containing a free sulfonic acid group, and after neutralizing the resulting solution with LiOH or NH4OH, the aqueous solution of the dye thus obtained is concentrated according to a process for separation through reverse osmotic membrane. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6120561-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6031083-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5559217-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5487761-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5096458-A |
| priorityDate |
1985-09-17^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |