| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1c7d818864ce69f0dc8548437f22a997 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F1-005 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F1-00 |
| filingDate |
1971-06-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1972-09-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a9505d4ff63b8b6e21d9fa4ddc79b159
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5db45866081b3c0f9145d88a71e3ab0b |
| publicationDate |
1972-09-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-3689544-A |
| titleOfInvention |
Process for preparing chelating agents |
| abstract |
A chelating agent having the formula WHEREIN; R is an alkyl group having about one to 20 carbon atoms, hydrogen, -CH2CH2OH, or -CH2COOM; and M is an alkali metal cation, is prepared by; (a) adjusting the pH of a first aqueous system consisting essentially of water and an amino acid having the formula OR AN ALKALI METAL SALT OF THE ACID TO ABOUT 6-10.5 TO FORM A SECOND AQUEOUS SYSTEM CONSISTING ESSENTIALLY OF THE ALKALI METAL SALT OF THE AMINO ACID DISSOLVED IN WATER, AND ADJUSTING THE TEMPERATURE OF THE SECOND AQUEOUS SYSTEM AT ABOUT 65*-105* C.; and (b) admixing epichlorohydrin with the second aqueous system while; (i) maintaining the pH of the resulting mixture at about 6-10.5; and (ii) maintaining the temperature of the resulting mixture at about 65*-105* C. for about 30-180 minutes to form a third aqueous system consisting essentially of an aqueous solution of the chelating agent. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3873296-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4304943-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4312815-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5447575-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10041182-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9501955-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5714457-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5208369-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5756784-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2012186572-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4152345-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5389594-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3988367-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2016186346-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9783905-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5258141-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5885955-A |
| priorityDate |
1971-06-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |