[EN] CHELATING AGENT PRECURSORS, FLUIDS CONTAINING THEM, AND THEIR USE<br/>[FR] PRÉCURSEURS D'AGENTS CHÉLATEURS, FLUIDES LES CONTENANT ET LEUR UTILISATION
申请人:AKZO NOBEL CHEMICALS INT BV
公开号:WO2012113738A1
公开(公告)日:2012-08-30
The present invention relates to a chelating agent precursor that contains glutamic acid N,N-diacetic acid (GLDA) and/or methylglycine N,N-diacetic acid (MGDA) wherein at least one of the carboxylic acid groups is presentas a carboxylic acid derivative selected from the group of amides, anhydrides, and esters, combinations thereof, and salts thereof, provided that it is not the triethyl ester of GLDA, the triethyl mono-t-butyl ester of GLDA, the tri-t-butyl ester of GLDA, the monobenzyl tri-t-butyl ester of GLDA, any ester or amide that contains azacycloalkane groups, any amide that contains biotin groups, any amide that contains minoethylcarbamoyl based amide groups, (S)-diethyl 2,2'-(1-benzyloxy)-1,5-dioxo-5-(prop-2-ynylamino)pentan-2-ylazanediyl-diacetate, diethyl 2,2'-(5-(3-azidopropylamino)-1-(benzyloxy)-1,5-dioxo-pentan-2-ylazanediyl-diacetate, the trimethyl ester of MGDA, the monomethyl ester dimethylamide of MGDA, the dibenzyl ester of MGDA, the dibenzyl mono t-butyl ester of MGDA, the di t-butyl ester of MGDA, the di-t-butyl- monobenzyl ester of MGDA, N,N-bis(benzyloxycarbonylmethyl)-N'-methoxycarbonylmethyl-alanine amide, or N,N- bis(tert-butoxycarbonyl)-N'-methoxycarbonylmethyl-alanine amide, and esters of GLDA immobilized on a gel, and that the amide is not the amide of ammonia, to a fluid containing the above chelating precursor and a liquid, and to the use of a chelating agent precursor of MGDA and GLDA and fluids containing them in an application wherein delayed acidity or chelating capacity is useful, such as in descaling, bleaching, cleaning, and treating oil and/or gas-containing subterranean formations.
本发明涉及一种螯合剂前体,其中包含谷氨酸N,N-二乙酸(GLDA)和/或甲基甘氨酸N,N-二乙酸(MGDA),其中至少一个羧酸基以羧酸衍生物的形式存在,所述羧酸衍生物选自酰胺、酐和酯的群组,其组合物和盐,前提是它不是GLDA的三乙酯、GLDA的三乙基单叔丁基酯、GLDA的三叔丁基酯、GLDA的单苄基三叔丁基酯、任何含有氮杂环烷基团的酯或酰胺、任何含有生物素基团的酰胺、任何含有氨基乙基氨基甲酰基团的酰胺、(S)-二乙酸2,2'-(1-苄氧基)-1,5-二氧代-5-(丙-2-炔基氨基)戊-2-基氮二乙酸酯,二乙酸2,2'-(5-(3-叠氮丙基氨基)-1-(苄氧基)-1,5-二氧代戊-2-基氮二乙酸酯,MGDA的三甲酯,MGDA的单甲酯二甲酰胺,MGDA的二苄酯,MGDA的二苄单叔丁基酯,MGDA的二叔丁基酯,MGDA的二叔丁基单苄酯,N,N-双(苄氧羰甲基)-N'-甲氧羰甲基-丙氨酸酰胺,或N,N-双(叔丁氧羰甲基)-N'-甲氧羰甲基-丙氨酸酰胺,以及固定在凝胶上的GLDA的酯,且所述酰胺不是氨的酰胺,用于含有上述螯合前体和液体的流体,以及在需要延迟酸度或螯合能力的应用中使用MGDA和GLDA的螯合剂前体和含有它们的流体,例如在除垢、漂白、清洁和处理含油和/或气体的地下岩层中。