- 2 - (N-substituted amino) - 5-naphthol-7-sulfonic acid clean production process (by machine translation)
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This invention belongs to the dyeing industry, relates to a new material in the field of technology of the dye intermediates, in particular 2 - (N-substituted amino) - 5-naphthol-7-sulfonic acid clean production process. To improve the quality of this invention, waste water is greatly reduced. 2 - (N-substituted amino) - 5-naphthol-7-sulfonic acid clean production process, the method comprises the following steps: A, condensation reaction; B, material after treatment; C, refining the filter cake. And the recovery and reuse of the filtrate. The method of the present invention that are used in the can be of various raw materials are purchased from the market, the compounds of the present invention and the use of the preparation process of the security process is, environmental protection, energy-saving. (by machine translation)
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Paragraph 0023-0029
(2017/03/28)
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- Monoazo compounds having vinylsulfone type fiber reactive group and method for dyeing or printing fiber materials using the same
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A monoazo compound of the following formula, STR1 wherein D is phenylene or naphthylene; X is halogeno, pyridinio or STR2 B is --OR3, --SR4, STR3 in which R3, R4, R5 and R6 are each hydrogen, alkyl, phenyl, naphthyl or benzyl, r is 0 or 1, and E is O, SO, SO2, CH2 or NR8, in which R8 is hydrogen or C1 -C4 alkyl; R, R1, R2 and R7 are each hydrogen or alkyl; A1, A2 and A3 are each phenylene, naphthylene or alkylene; Z1, Z2 and Z3 are each --SO2 CH=CH2 or --SO2 CH2 CH2 Y, in which Y is a splittable group; and p is 0 or 1; which compound is useful for dyeing or printing fiber materials to obtain a product dyed or printed in a color superior in various fastness properties with superior build-up property.
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- Copper complexes of sulpho groups containing disazo dyestuffs
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The new disazo dyestuffs of the formula (I) STR1 in which the substituents and indices have the meaning given in the description, and salts thereof are outstandingly suitable for dyeing cellulose-containing materials and leather in blue shades having good wet- and light-fastnesses.
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