公开(公告)号：US4340389A

公开(公告)日：1982-07-20

申请号：US254365

申请日：1981-04-15

申请人： Konrad Nonn ,  Joachim Laser ,  Karlheinz Wolf ,  Reinhold Hornle ,  Erich Istel

发明人： Konrad Nonn ,  Joachim Laser ,  Karlheinz Wolf ,  Reinhold Hornle ,  Erich Istel

IPC分类号： C09B67/44 ,  C09B43/14 ,  C09B45/16 ,  C09B67/06 ,  C09B67/54 ,  D06L3/12

CPC分类号： C09B67/0096 ,  C09B43/14 ,  C09B45/16 ,  C09B67/0003 ,  D06L3/1264

摘要： Process for the preparation of water-soluble dyestuffs with a low salt content, characterized in that the water-soluble dyestuffs are salted out from their aqueous solutions and/or dispersions by adding salts which are volatile at temperatures of about 40.degree. C. to about 250.degree. C. under a pressure of about 10 mm Hg to about 760 mm Hg, the dyestuffs are isolated and the volatile salts are volatilized during the drying process.

摘要翻译： 用于制备盐含量低的水溶性染料的方法，其特征在于通过加入在约40℃至约40℃的温度下挥发的盐将水溶性染料从其水溶液和/或分散体中盐析出 在约10mmHg至约760mm Hg的压力下，分离出染料，并且挥发性盐在干燥过程中挥发。