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。