申请人:Shell Internationale Research Maatschappij B.V.
公开号:EP2738234A1
公开(公告)日:2014-06-04
The invention relates to a composition for demulsifying an emulsion which comprises oil and water (oil/water emulsion), the composition comprising a salt of formula (I) [R1R2R3R4A+]m[Xn-], wherein [R1R2R3R4A+] represents a cation; A is nitrogen or phosphorus; R1 is a hydrocarbyl group containing 6 to 26 carbon atoms; R2, R3 and R4 may be the same or different and each of R2, R3 and R4 is hydrogen or a hydrocarbyl group containing 1 to 4 carbon atoms, or A, R2 and R3 form a ring containing 4 to 8 carbon atoms and R4 is hydrogen or a hydrocarbyl group containing 1 to 4 carbon atoms, or A, R2, R3 and R4 form a ring containing 4 to 8 carbon atoms and a double bond is present between A and an adjacent carbon atom in the ring; [X-] represents an anion; and m = n = 1, 2 or 3. Further, the invention relates to a process for demulsifying an oil/water emulsion comprising contacting the emulsion with said salt of formula (I). Still further, the invention relates to a method of recovering crude oil from a crude oil containing formation wherein said salt of formula (I) is also used as a demulsifier for the oil/water emulsion recovered from said formation.
本发明涉及一种用于破乳的组合物,该组合物包括式(I)[R1R2R3R4A+]m[Xn-]的盐,其中[R1R2R3R4A+]代表阳离子;A是氮或磷;R1是含6至26个碳原子的烃基;R2、R3和R4可以相同或不同,且R2、R3和R4各自为氢或含有1至4个碳原子的烃基,或A、R2和R3形成一个含有4至8个碳原子的环,且R4为氢或含有1至4个碳原子的烃基,或A、R2、R3和R4形成一个含有4至8个碳原子的环,且A与环中相邻碳原子之间存在双键;[X-]代表阴离子;m=n=1、2或3。此外,本发明还涉及一种破乳化油/水乳液的工艺,包括将乳液与所述式(I)盐接触。此外,本发明还涉及一种从含原油地层中回收原油的方法,其中所述式(I)盐还用作从所述地层中回收的油/水乳状液的破乳剂。