-
公开(公告)号:US06660694B1
公开(公告)日:2003-12-09
申请号:US10211182
申请日:2002-08-02
IPC分类号: C09K300
CPC分类号: C09K8/5045 , C09K8/506
摘要: Sealing a zone in a subterranean well-formation is effected with an aqueous silicate solution containing an alkali metal silicate, at least one activator and a mixture of a chelating agent and a phosphonate. This composition greatly increases the divalent ion tolerance of the silicate gelling system.
摘要翻译: 用含有碱金属硅酸盐,至少一种活化剂和螯合剂和膦酸盐的混合物的含水硅酸盐溶液来实现地层中的区域的密封。 该组合物大大增加了硅酸盐胶凝体系的二价离子耐受性。
-
公开(公告)号:US4767860A
公开(公告)日:1988-08-30
申请号:US917861
申请日:1986-10-14
IPC分类号: C07D241/08
CPC分类号: C07D241/08
摘要: N-substituted piperazinones are prepared by reacting an N-substituted ethylenediamine such as N,N'-dimethylethylenediamine with a 2-oxoaldehyde such as glyoxal. N-substituted piperazinones are useful as flue gas desulfurization agents.
摘要翻译: N-取代的哌嗪酮通过N-取代的乙二胺如N,N'-二甲基乙二胺与2-氧代醛如乙二醛反应来制备。 N-取代的哌嗪酮可用作烟道气脱硫剂。
-