发明名称 |
HYDROCHLORIC ACID COMPOSITIONS AND THEIR USE |
摘要 |
The invention provides a thickened aqueous hydrochloric acid composition comprising (a) 1 to 20% w hydrogen chloride, (b) an alcohol ethoxylate of general formula R-O-CH2-CH2-O)nH wherein R is a C8-20 alkyl group and n has an average value in the range 3 to 15, provided that the (CH2-CH2-O)n moiety constitutes 50 to 67% w of the alcohol ethoxylate, (c) an alkyl aryl sulfonic acid of general formula <IMAGE> II wherein R1 is a C8-13 linear alkyl chain and R2 and R3 independently hydrogen atoms or methyl groups, the combined concentration of (b) and (c) being in the range 3 to 15% w, the relative weight proportions of (b) and (c) being in the range 45 to 65% of (b) to 55 to 35% of (c), and (d) 0 to 2% w of a salicylate of general formula <IMAGE> where R4 is a C1-4 alkyl or a benzyl group. The compositions may be used as lime scale removers or in acid treatment of subterranean formations surrounding oil or gas wells. |
申请公布号 |
DE3379067(D1) |
申请公布日期 |
1989.03.02 |
申请号 |
DE19833379067 |
申请日期 |
1983.12.05 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. |
发明人 |
ROOTSAERT, WALTER JOSEPH MARIE;VAN DER LOO, CAROLUS HENDRICUS |
分类号 |
C09K8/04;C02F5/00;C02F5/08;C02F5/10;C09K8/528;C09K8/74;C11D10/00;(IPC1-7):E21B37/06;E21B43/27 |
主分类号 |
C09K8/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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