Detail of "6486-29-9"

Reference

Method for removal of salt and byproduct by film separation in direct dye manufacture

All Rights Reserved. Method for removal of salt and byproduct by film separation in direct dye manufacture. Zhang, Chaoshui; Zhang, Baowen (Tianjin Yadong Chemical & Dyestuff Factory, Peop. Rep. China). Faming Zhuanli Shenqing Gongkai Shuomingshu CN 1884390 A 27 Dec 2006, 9pp. (Chinese). (People's Republic of China). 6486-29-9 and 920271-51-8 are also occured in this study. CODEN: CNXXEV. APPLICATION: CN 2010-13983 31 May 2006. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) The title method comprises using two series of connected film sepn. units, and selecting filtering film for 0.5-1 nm mol. in dissolved substance, wherein one film sepn. unit is used for obtaining deionized water, while the other one is connected with a measure trench for continuously removing salt and byproduct in film sepn. permeation process of adding dye soln. and mixing deionized water to the measure trench (dye soln. concn. = 15-20%; vol. ratio of dye soln. /deionized water = 1 : (0.5-1.5); pH = 5.5-7.5; temp. = 25-40°C; pressure = 10-25 bar; flux = 200-600 LMH when film area is 200 m2). The method can intercept dye mols. with mol. wt. more than 500, filter inorg. salt, byproduct and water, and conc. dye soln. to concn. of 22-35%. In the process cond. is 0.8-1.9 ms/cm and salt content of dye soln. is 0.05-0.1%. Auxiliary materials can be added to obtain dye liq. std. product, or performing spray-drying to obtain dye solid std. product. .