The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 1987
Filed:
Apr. 22, 1985
Marc Baviere, Noisy Le Roi, FR;
Bruno Durif Varambon, Vienne, FR;
Institut Francais du Petrole, Rueil-Malmaison, FR;
Abstract
In the preparation of miceller systems for enhanced hydrocarbon recovery, surfactants are used which consist of N-acyl N-alkyl-.alpha.-amino-carboxylic compounds. The considered products comply with the general formulas: ##STR1## wherein at least one of R.sup.1, R.sup.2 and R.sup.3 is a saturated or unsaturated C.sub.1 -C.sub.22 aliphatic hydrocarbon radical (one of them having optionally a carboxylic group) the other or others being a hydrogen atom, R.sup.1, R.sup.2 and R.sup.3 having together from 4 to 22 carbon atoms, R.sup.4 is an alkyl radical of 1-5 carbon atoms, R.sup.5 an alkyl radical of 1-12 carbon atoms and M is an alkali or alkaline-earth metal, ammonium or a quaternary ammonium group. As used in the formation of micellar systems (aqueous solutions, emulsions or mirco-emulsions) for enhanced oil recovery, these surfactants have improved performances, particularly, in field waters of high polyvalent ion (Ca.sup.++ and Mg.sup.++) content, within relatively wide temperature and pH ranges.