COMPOSITION FOR STEAM EXTRACTION OF BITUMEN
First Claim
1. A method to recover bitumen comprising the step of contacting oil sands with a composition comprising an alkanolamine and a glycol ether wherein the alkanolamine/glycol ether composition comprises:
- (i) an alkanolamine described by the following structure;
R1R2N—
R3OHwhere R1 is H, or a linear, branched, or cyclic alkyl group of 1 to 4 carbons, R2 is H, —
CH2CH2OH, or a linear, branched, or cyclic alkyl group of 1 to 4 carbons,andR3 is a linear or branched alkyl group of 2 to 5 carbonsand(ii) one or more glycol ether selected from;
(a) an ethylene oxide capped glycol ether described by the following structure;
RO—
(CH2CH(CH3)O)m(C2H4O)nHwherein R is a linear, branched, cyclic alkyl, phenyl, or alkyl phenyl group of equal to or greater than 4 carbons,m is 0 to 3,andn is 1 to 3,and(b) a propylene oxide capped glycol ether described by the following structure;
RO—
(C2H4O)o(CH2CH(CH3)O)pHwherein R is a linear, branched, cyclic alkyl, phenyl, or alkyl phenyl group of equal to or greater than 4 carbons,o is 0 to 3,andp is 1 to 3,wherein the treatment is to oil sands recovered by surface mining or in situ production.
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Abstract
The present invention relates to a bitumen recovery process from oil sands. The oil sands may be surface mined and transported to a treatment area or may be treated directly by means of an in situ process of oil sand deposits that are located too deep for strip mining. Specifically, the present invention involves the step of treating oil sands with a composition comprising an alkanolamine and an ethylene oxide capped glycol ether and/or propylene oxide capped glycol ether.
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Citations
9 Claims
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1. A method to recover bitumen comprising the step of contacting oil sands with a composition comprising an alkanolamine and a glycol ether wherein the alkanolamine/glycol ether composition comprises:
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(i) an alkanolamine described by the following structure;
R1R2N—
R3OHwhere R1 is H, or a linear, branched, or cyclic alkyl group of 1 to 4 carbons, R2 is H, —
CH2CH2OH, or a linear, branched, or cyclic alkyl group of 1 to 4 carbons,and R3 is a linear or branched alkyl group of 2 to 5 carbons and (ii) one or more glycol ether selected from; (a) an ethylene oxide capped glycol ether described by the following structure;
RO—
(CH2CH(CH3)O)m(C2H4O)nHwherein R is a linear, branched, cyclic alkyl, phenyl, or alkyl phenyl group of equal to or greater than 4 carbons, m is 0 to 3, and n is 1 to 3, and (b) a propylene oxide capped glycol ether described by the following structure;
RO—
(C2H4O)o(CH2CH(CH3)O)pHwherein R is a linear, branched, cyclic alkyl, phenyl, or alkyl phenyl group of equal to or greater than 4 carbons, o is 0 to 3, and p is 1 to 3, wherein the treatment is to oil sands recovered by surface mining or in situ production. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification