C - Chemistry – Metallurgy – 12 – N
Patent
C - Chemistry, Metallurgy
12
N
195/140
C12N 1/00 (2006.01) C09K 8/90 (2006.01) C12P 19/06 (2006.01)
Patent
CA 1134300
P.C. 6096A PROCESS FOR TREATING XANTHOMONAS FERMENTATION BROTH FOR USE IN DISPLACEMENT OF OIL FROM PARTIALLY DEPLETED RESERVOIRS Abstract A process for preparing an oil recovery mobility control solution having activity enhancement of greater than 15% and a filter ratio of less than 3 through a Millipore*filter with a pore size of 1.2 microns which process comprises heating an aqueous solution of Xanthomonas biopolymer at an equivalent xanthan concen- tration of 0.05 to 2.0% and a salt content of less than 0.2% for a period of from about 2 to 60 minutes at a temperature of about 60-98°C, and when the equivalent xanthan concentration exceeds 3000 ppm diluting the solution to an equivalent xanthan concentration of from about 100 to 3000 ppm. Also disclosed is such a process which comprises the steps of: (a) diluting a whole Xanthomonas fermentation broth to an equivalent xanthan concentration of 0.14- 1.5% with water having a salt content of less than 0.2%; (b) heating said broth for a period of from about 2 to 60 minutes at a temperature of about 77-98°C; and (c) filtering said broth to yield a filtrate with activity enhancement of greater than 15% and a filter ratio of less than 3 through a Millipore*filter with a pore size of 1.2 microns. *Trade Mark
339181
Ho Lewis
Miller Robert L.
Limited Pfizer
Smart & Biggar
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