发明授权
- 专利标题: Demineralization of aqueous liquid dye composition
- 专利标题(中): 水性液体染料组合物的脱矿质
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申请号: US039954申请日: 1987-04-20
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公开(公告)号: US4842614A公开(公告)日: 1989-06-27
- 发明人: Noriaki Yamauchi , Kunihiko Imada , Yutaka Kayane
- 申请人: Noriaki Yamauchi , Kunihiko Imada , Yutaka Kayane
- 申请人地址: JPX Osaka
- 专利权人: Sumitomo Chemical Company, Limited
- 当前专利权人: Sumitomo Chemical Company, Limited
- 当前专利权人地址: JPX Osaka
- 优先权: JPX61-101329 19860430; JPX61-128805 19860603
- 主分类号: C09B67/26
- IPC分类号: C09B67/26
摘要:
An aqueous liquid composition containing a reactive dye of the following formulaD--SO.sub.2 X).sub.nwherein D is an organic dye residue having 1 to 3 sulfonic acid grups, X is a group of --CH.dbd.CH.sub.2 or --CH.sub.2 CH.sub.2 Y in which Y is a splittable group by the action of an alkali, and n is a number of 1 or 2, in an amount of 5 to 50% by weight based on the weight of the composition, which composition is improved in storage stability at a low temperature, is produced by preparing an undemimeralized agueous solution of the dye of the above formula, dissolving at least one additive selected from lactams and aminoalcohols in the solution, controlling the resulting solution to a temperature of -10.degree. C. to 5.degree. C. to crystallized inorganic salts contained therein, and separating the crystallized inorganic salts, the said additive being used in an amount of 0.1 to 20% by weight based on the weight of the composition.
公开/授权文献
- US5990324A Process for producing 3-methyltetrahydrofuran 公开/授权日:1999-11-23