摘要:
New surface-active compounds of the sulfobetaines group are manufactured. They comply with the general formula: ##STR1## wherein each of R.sub.1, R.sub.2 and R.sub.3 is substantially a hydrocarbon radical, each of R.sub.4 and R.sub.5 is a hydrogen atom or substantially a hydrocarbon radical and R.sub.6 is a hydrogen atom or a hydrocarbon radical, R.sub.1 to R.sub.6 radicals containing together from 12 to 30 carbon atoms, n is an integer equal to 2 to 3, Z may be a CH.sub.3 radical or a hydroxy group, p may be 0 or 1 with, when Z is a hydroxy group and p is equal to 1, a value of 1 for m and for q; when Z is a methyl radical, with a value of 1 for p, a value of 2 for m and a value of 0 or 1 for q and, when p=0, a value of 2, 3 or 4 for the sum (m+q).These new surfactants are useful in enhanced oil recovery as micellar systems consisting of aqueous solutions and microemulsions.
摘要:
Enhanced recovery of oil from oil fields is effected by making use of an inexpensive surface-active agent formed by oxidizing a portion of crude oil with an aqueous solution of sodium hypochlorite at a temperature of 20.degree.-180.degree. C. The oxidized crude can be injected in the field in admixture with non-oxidized crude or with water as a micro-emulsion.
摘要:
A process for manufacturing an alkenyl dicarboxylic acid, anhydride comprises reacting at least one halogenated polyolefin with at least one unsaturated dicarboxylic acid anhydride in substantially stoichiometrical proportion, in the presence of a minor proportion of at least one organic compound containing at least one double bond bearing at least one electron attracting substituent.
摘要:
A dicarboxylic compound complying with one of the general formulae: ##SPC1##In which R is a divalent radical selected from the aliphatic, alicyclic and aromatic radicals, the aliphatic containing 1-20 carbon atoms and the other containing from 5 to 20 carbon atoms, R.sup.1 is selected from the hydrogen atom and the alkyl and cycloalkyl groups containing from 1 to 10 carbon atoms and R.sup.2 is selected from the alkyl and cycloalkyl groups containing from 1 to 10 carbon atoms, the polyester resins derived therefrom being usable as enamelling composition, particularly for coating metal wires.