http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-3134530-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dcb88e6c103e4974b104452c51fbb4a5 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-584 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-584 |
| filingDate | 1981-09-01^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c5f8e24cf22ca33125f4a417ada65048 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6f51017c8b32786f04ac11ac6e13fde9 |
| publicationDate | 1982-05-13^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-3134530-A1 |
| titleOfInvention | METHOD FOR OBTAINING OIL FROM AN UNDERGROUND DEPOSIT |
| abstract | In a process for recovering largely emulsion-free oil from an underground deposit of medium or high salinity by injecting 1 to 20% solution or dispersion in formation water of carboxymethylated oxethylates of the formula R-(OCH2CH2)n-OCH2-COOM, in which R is a linear or branched aliphatic radical having 4 to 20 carbon atoms or an alkyl- or dialkyl-aromatic radical having 1 to 14 carbon atoms in the alkyl group, n is 3 to 30 and M is an alkali metal ion, alkaline earth metal ion or ammonium and the degree of carboxymethylation is between 10 and 90%, into an injection well, the surfactant is selected such that the phase inversion temperature of the crude oil/formation water/surfactant/optional additives system is 0 to 10 DEG C above the temperature of the deposit. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111019623-A |
| priorityDate | 1980-09-10^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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