公开(公告)号：EP2785686B1

公开(公告)日：2017-10-18

申请号：EP12791486.9

申请日：2012-11-28

Applicant: BASF SE

Inventor： EBEL, Klaus ,  VOITL, Tobias ,  KELLER, Andreas ,  RUEDENAUER, Stefan ,  BARTLING, Karsten ,  LANGLOTZ, Bjoern ,  STEINER, Jochen

IPC: C07C303/44 ,  C07C309/15

CPC classification number: C07C303/44 ,  C07C309/15

公开(公告)号：EP2785686A2

公开(公告)日：2014-10-08

申请号：EP12791486.9

申请日：2012-11-28

Applicant: BASF SE

Inventor： EBEL, Klaus ,  VOITL, Tobias ,  KELLER, Andreas ,  RUEDENAUER, Stefan ,  BARTLING, Karsten ,  LANGLOTZ, Bjoern ,  STEINER, Jochen

IPC: C07C303/44 ,  C07C309/15

CPC classification number: C07C303/44 ,  C07C309/15

Abstract: The invention relates to a method for producing salts of acrylamido-2-methylpropane sulfonic acid (A), comprising the following steps: a) producing a solution of a contaminated salt of acrylamido-2-methylpropane sulfonic acid (A) in a water-free, organic solvent (L) using at least one basic component (B) selected from the group comprising alkali metal oxides, alkaline-earth metal oxides, alkali hydroxides, alkaline-earth metal hydroxides, and amines of general formula (I) NR
a R
b R
c (I), wherein the groups R
a , R
b , and R
c mean the following independently of each other: hydrogen, C
1 -C
4 alkyl, hydroxy C
1 -C
4 alkyl, or C
1 -C
4 alkoxy, wherein the molar ratio of compound (A) to basic component (B) is preferably 1:1 to 1:3; b) optionally partially removing the organic solvent (L) at a pressure in the range of 0.001 to 2 bar (abs); c) recovering the dissolved salt of compound (A) by crystallization or precipitation, by changing the temperature and/or the pressure and/or the concentration of the salt in the solution; d) optionally drying the purified salt of acrylamido-2-methylpropane sulfonic acid (A). Said method according to the invention leads to salts that are poor in byproduct and especially suitable for polymerization.

Abstract translation: 本发明涉及一种丙烯酰氨基-2-甲基丙磺酸（A）的盐的制备方法，包括以下步骤：a）将丙烯酰氨基-2-甲基丙磺酸（A）的污染盐溶液在水溶液中， 使用选自碱金属氧化物，碱土金属氧化物，碱金属氢氧化物，碱土金属氢氧化物和通式（I）的胺的至少一种碱性组分（B）的游离的有机溶剂（L）NRa Rb Rc（I）其中基团R a，R b和R c彼此独立地表示：氢，C 1 -C 4烷基，羟基C 1 -C 4烷基或C 1 -C 4烷氧基，其中化合物（A） 至碱性成分（B）优选为1：1〜1：3; b）任选地在0.001至2巴（abs）范围内的压力下部分除去有机溶剂（L）; c）通过结晶或沉淀，通过改变溶液中的盐的温度和/或压力和/或浓度来回收化合物（A）的溶解盐; d）任选地干燥丙烯酰胺-2-甲基丙磺酸（A）的纯化盐。 根据本发明的所述方法导致副产物不良的盐，特别适用于聚合。