| 摘要 |
The present invention relates to highly concentrated, anhydrous amine salts of hydrocarbon polyalkoxy sulfates, wherein the salts are selected from the group of substituted amines, preferably alkanolamines. The products obtained are of low viscosity and pumpable at room temperature. Due to the absence of water, the salts are highly resistant to hydrolysis, even at high temperatures. The invention further relates to the use of the compositions according to the invention in an aqueous dilution for use in oil reservoirs with the aim of achieving enhanced oil production, or for the recovery of hydrocarbons from tar sands or other surfaces or materials provided with hydrocarbon. |
| 主权项 |
1. A highly concentrated composition of amine salts of hydrocarbon polyalkoxy sulfates that is flowable at 25° C., comprising:
(A) greater than 80% by weight amine salts of hydrocarbon polyalkoxy sulfates of the formula
R4—O-[EO, PO, AO]n—SO3—HNR1R2R3+ wherein
one, two or three of substituents R1, R2 and R3 are each independently selected from the group:
alkyl having 1 to 14 carbon atoms,alkenyl having 3 to 18 carbon atoms,hydroxyalkyl having 3 or 4 carbon atoms,two or three substituents are hydroxyalkyl having 2 carbon atoms,and mixtures thereofwherein the hydroxyalkyl is optionally alkoxylated andwherein the remaining substituent(s) are each hydrogen; and
R4 is/are one or more different C10 to C36 hydrocarbon(s), optionally in a mixture with less than 20% by weight of said above amine salts of hydrocarbon polyalkoxy sulfates in which said alkoxy groups are exclusively EO; (B) at least 0.1 up to less than 5% by weight, in particular 0.2 to 3% by weight, of the non-sulfated polyalkoxylated hydrocarbon R4—O-[EO, PO, AO]n—H or of the mixture; (C) up to less than 5% by weight of said non-sulfated hydroxy hydrocarbons R4—OH or of the mixture;
wherein (B) and (C) together represent 0.1 to 10% by weight of the composition;wherein the composition
comprises less than 2% by weight of water andthe number n of said alkoxy groups EO, PO, AO combined is 1 to 16,
and the alkoxy groups are selected from: 1 to 16, propoxy groups (PO) and optionally from one or more of the groups 0 to 15 ethoxy groups (EO), and 0 to 10 C4 to C12 alkyleneoxy groups (AO),
and the alkoxy groups are distributed randomly or are present in blocks, or both. |
