发明名称 |
Process for the preparation of water-soluble dyestuffs with a low salt content |
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 DEG C. to about 250 DEG 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.
|
申请公布号 |
US4340389(A) |
申请公布日期 |
1982.07.20 |
申请号 |
US19810254365 |
申请日期 |
1981.04.15 |
申请人 |
BAYER AKTIENGESELLSCHAFT |
发明人 |
NONN, KONRAD;LASER, JOACHIM;WOLF, KARLHEINZ;HOERNLE, REINHOLD;ISTEL, ERICH |
分类号 |
C09B67/44;C09B43/14;C09B45/16;C09B67/06;C09B67/54;D06L3/12;(IPC1-7):C09B67/54 |
主分类号 |
C09B67/44 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|