| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_90e7136bc810b844502b21de846a8a71 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S507-936 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08H6-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-584 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-584 |
| filingDate |
1987-12-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1988-11-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8f9598d04df04eeb1fb0eb948f7a5c29
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6f456442ac50079cd9cef209e10c851d |
| publicationDate |
1988-11-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-4781251-A |
| titleOfInvention |
Recovering hydrocarbons with water soluble alkylphenol lignin surfactants |
| abstract |
The invention is a method of recovering hydrocarbons with a surfactant flooding system, wherein the surfactant slug comprises about 0.1% to about 10% by weight of an alkylphenol lignin surfactant. The alkylphenol lignin surfactant is produced by reacting an alkylphenol having about 6 to about 15 carbon atoms in the alkyl chain with formaldehyde in basic solution at a temperature of about 50 DEG to about 120 DEG C. for about 15 minutes to about 3 hours to form a first reaction product. The first reaction product is then reacted with a kraft lignin in solution at a temperature of about 100 DEG to about 160 DEG C. for about 30 minutes to about 5 hours to form an alkylphenol lignin reaction product. Finally, the alkylphenol lignin reaction product is made more water soluble by subjecting the alkylphenol lignin reaction product to a reaction selected from the group consisting of sulfonation, sulfation, alkoxysulfonation, alkoxysulfation, and alkoxylation to produce the alkylphenol lignin surfactant. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9790248-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5686512-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110905460-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5035288-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009218061-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5094295-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8795472-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009218062-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2018037794-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5911276-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8987428-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8894818-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10501677-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5095985-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112500844-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5095986-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5043432-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5230814-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5405498-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5049661-A |
| priorityDate |
1987-12-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |