Separatory and emulsion breaking processes
View Patent ↗The invention pertains to the use of a class of acetylenic surfactants to resolve or break water and oil emulsions. The surfactants are of particular advantage in resolving crude oil emulsions of the type encountered in desalter and similar apparatus designed to extract brines from the crude as they partition to the aqueous phase in the desalter. Also, the surfactants may be used to separate oil from oil sands and similar oil/solids matrices.
1. A method of improving separation of oil from an oil sands matrix comprising contacting said oil sands matrix with a treatment comprising an acetylenic surfactant compound or compounds selected from the Groups Ia, Ib, and III and mixtures thereof, wherein Group I(a) has the formula
and wherein said Group Ib has the formula
wherein R is CH 2 —CH 2 ; R 5 is CH 2 (CH 3 )CH or CH 2 —CH 2 —CH 2 ; R 1 and R 4 are a straight or a branched chain alkyl having from about 3 to 10 C atoms or an aryl group; R 2 and R 3 are H, an alkyl chain having 1 to 5 C atoms or aryl group, and in, n, p, and q are numbers that range from about 0 to about 30, and wherein
said Group III has the formula
wherein R and m are as previously defined and each R 6 is independently chosen from H, C 1 -C 10 alkyl or an aryl group, said method further comprising contacting said oil sands matrix with water alkyl or an aryl group, said method further comprising contacting said oil sands matrix with water or steam, said treatment being added in an amount of about 1-1,000 ppm based on one million parts of said water or steam, said method further comprising contacting said oil sands matrix with an additional surfactant (II), said additional surfactant being a polyol having the formula
wherein the moieties x, y and z are each at least 1 and are such as to provide the compound with a molecular weight of about 500 or higher.
2. A method as recited in claim 1 wherein said oil sands is washed with said water in order to form a froth or slurry and wherein about 1-1,000 ppm of said treatment is added to said water and wherein said treatment comprises a member or members selected from
a) 2,4,7,9-tetramethyl-5-decyne-4,7-diol (TMDD-5) and
b) 2,5,8,11-tetramethyl-6-dodecyne-5,8-diol (TMDD-6) and
c) 3,5-dimethyl-1-hexyn-3-ol (DMHO) and ethoxylate and propylene oxide derivatives of a); b); and c).
3. A method as recited in claim 1 wherein said oil sands is subjected to steam assist gravity discharge processes in order to improve separation of said crude oil and in which steam is injected into a downhole location, said treatment being added to said steam in an amount of 1-1,000 ppm and wherein said treatment comprises a member or members selected from
a) 2,4,7,9-tetramethyl-5-decyne-4,7-diol (TMDD-5) and
b) 2,5,8,11-tetramethyl-6-dodecyne-5,8-diol (TMDD-6) and
c) 3,5-dimethyl-1-hexyn-3-ol (DMHO) and ethoxylate and propylene oxide derivatives of a); b); and c).
4. Method as recited in claim 1 wherein said additional surfactant (II) has a molecular weight of from about 500 to about 30,000.
5. Method as recited in claim 4 wherein said x and z moieties of said additional surfactant (II) comprise about 20%-80% by weight of said additional surfactant.
6. Method as recited in claim 5 wherein said x and z moieties comprise about 40% by weight of said additional surfactant and said additional surfactant has a molecular weight of about 4,000.
7. In a method of producing crude oil from a subterranean formation wherein steam or hydrocarbon vapor is injected into said formation to aid in recovery of said crude, the improvement comprising adding a volatile surfactant to said steam or vapor hi an amount of about 1-10,000 ppm surfactant based on one million parts of said steam; said method comprising a steam assisted gravity drainage operation for separating crude from tar sand and wherein said volatile surfactant comprises a steam volatile surfactant; said volatile surfactant comprising a steam volatile acetylenic surfactant compound or compounds selected from the Groups Ia, Ib, and III and mixtures thereof, wherein Group I(a) has the formula
and wherein said Group Ib has the formula
wherein R is CH 2 —CH 2 ; R 5 is CH 2 (CH 3 )CH or CH 2 —CH 2 —CH 2 ; R 1 and R 4 are a straight or a branched chain alkyl having from about 3 to 10 C atoms or an aryl group; R 2 and R 3 are H, an alkyl chain having 1 to 5 C atoms or aryl group, and m, n, p, and q are numbers that range from about 0 to about 30,
and wherein said Group III has the formula
wherein R and m are as previously defined and each R 6 is independently chosen from H, C 1 -C 10 alkyl or an aryl group, said method further comprising contacting said solids containing matrix with water or steam.
8. A method as recited in claim 7 wherein said acetylenic surfactant compound or compounds are selected from
a) 2,4,7,9-tetramethyl-5-decyne-4,7-diol (TMDD-5) and
b) 2,5,8,11-tetramethyl-6-dodecyne-5,8-diol (TMDD-6) and
c) 3,5-dimethyl-1-hexyn-3-ol (DMHO) and ethoxylate and propylene oxide derivatives of a); b); and c).
9. In a method of producing crude oil from a subterranean formation wherein steam or hydrocarbon vapor is injected into said formation to aid in recovery of said crude, the improvement comprising adding volatile surfactant to said steam or vapor in an amount of about 1-10,000 ppm surfactant based on one million parts of said steam; said method comprising a steam assisted gravity drainage operation for separating crude from tar sand and wherein said volatile surfactant comprises a steam volatile surfactant; said volatile surfactant comprising a steam volatile acetylenic surfactant compound or compounds selected from the Groups Ia, Ib, and III and mixtures thereof, wherein Group I(a) has the formula
and wherein said Group Ib has the formula
wherein R is CH 2 —CH 2 ; R 5 is CH 2 (CH 3 )CH or CH 2 —CH 2 —CH 2 ; R 1 and R 4 are a straight or a branched chain alkyl having from about 3 to 10 C atoms or an aryl group; R 2 and R 3 are H, an alkyl chain having 1 to 5 C atoms or aryl group, and m, n, p, and q are numbers that range from about 0 to about 30,
and wherein said Group III has the formula
wherein R and m are as previously defined and each R 6 is independently chosen from H, C 1 -C 10 alkyl or an aryl group, said method further comprising contacting said solids containing matrix with water or steam;
wherein said method further comprises adding an additional surfactant II to said steam or hydrocarbon vapor, said additional surfactant II being a polyol having the formula
wherein the moieties x, y, and z are each at least 1 and are such as to provide the compound with a molecular weight of about 500 or higher.
10. Method as recited in claim 9 wherein said additional surfactant (II) has a molecular weight of from about 500 to about 30,000.
11. Method as recited in claim 10 wherein said x and z moieties of said additional surfactant (II) comprise about 20%-80% by weight of said additional surfactant.
12. Method as recited in claim 11 wherein said x and z moieties comprise about 40% by weight of said additional surfactant and said additional surfactant has a molecular weight of about 4,000.