申请人:Phillips Petroleum Company
公开号:US04636572A1
公开(公告)日:1987-01-13
A process for preparing clear green chromium(III) propionate solutions which comprises admixing such as propionic acid with water, a chromium(VI) source such as dichromate, adding thereto a nitrite, such as sodium nitrite, to reduce the chromium(VI) to chromium(III), in the presence of excess acid, preferably propionic acid, optionally combined with additional acid such as muriatic acid, to produce a stable solution useful with polymers, such as partially hydrolyzed acrylamide-based polymers, in permeability contrast correction procedures for high permeability streaks in oil field treatments.
一种制备清晰的绿色铬(III)丙酸盐溶液的方法,包括将丙酸与水混合,加入铬(VI)源,例如重铬酸盐,然后加入亚硝酸盐,例如亚硝酸钠,以还原铬(VI)为铬(III),在过量酸的存在下进行,最好是丙酸,可选择性地与其他酸,例如盐酸,结合使用,以产生稳定的溶液,用于与聚合物,例如部分水解的丙烯酰胺基聚合物一起,在渗透率对比校正程序中使用,用于油田处理中高渗透率条纹的处理。