Patent ID: 9006216
Filing Date: 2015-04-14
Classification: A01N

Abstract:
1. A biocidal formulation for aqueous addition to fracturing water during secondary oil and gas recovery from a well, comprising orthophthalaldehyde within a range of from 0.25-7% by weight, plus tributyl tetradecyl phosphonium chloride (TTPC) within a range of from 0.24-6% by weight, approximately equal amounts of said orthophthalaldehyde and TTPC, and excipient constituents including triethanol amine, glycol ether, sulfonic acid and water, all mixed in an isopropyl alcohol solution having a pH within a range of from 3 to 9, wherein said biocidal formulation is diluted to within a range of from 50 ppm to 1000 ppm prior to aqueous addition to said fracturing water.