119-28-8Relevant articles and documents
Preparation method of clean product 1, 6 and 1,7 mixed
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Paragraph 0037; 0041-0042, (2020/06/16)
The invention relates to a preparation method of a cleaning type product 1,6- and 1,7-Cleve's acid. The method comprises the following steps: performing sulfonation on refined naphthalene to obtain 2-naphthalene sulfonic acid, performing nitration for the formation of a mixture of 1-nitro-6-naphthalenesulfonic acid and 1-nitro-7-naphthalenesulfonic acid, performing neutralization through ammonia water, and finally performing hydrazine hydrate reduction to obtain the 1,6- and 1,7-Cleve's acid. Compared with original production process, the method provided by the invention has no generation of waste residue in the whole process, the purpose of emission reduction is achieved, and the process is more simple and convenient, and has safety and effectiveness. In addition, the overall cost of theprocess provided by the invention is lower than the overall cost of an original process.
Polyazo dye compounds having plural vinylsulfone type fiber reactive groups in one molecule
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, (2008/06/13)
A polyazo compound of the following formula, wherein A is phenylene, naphthylene or alkylene, X is -NR2R3, -OR4 or -SR5 in which R2, R3, R4 and R5 are each hydrogen, alkyl, phenyl, naphthylene or benzyl, Z is -SO2CH=CH2 or -SO2CH2CH2Z? in which Z? is a splittable group, R1 is hydrogen or alkyl, and F is polyazo dye moiety carrying a fiber reactive group like that represented by Z, 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.
Fiber-reactive disazo brown dye having vinylsulfone-type reactive group
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, (2008/06/13)
A compound, or a salt thereof, represented by the following formula, STR1 wherein A is a substituted or unsubstituted phenylene or naphthylene group, B is STR2 in which R3 is a hydrogen atom or a lower alkyl, lower alkoxy, acylamino or ureido group, and R4 is a hydrogen atom or a lower alkyl or lower alkoxy group, R1 and R3 are independently a hydrogen atom or a substituted or unsubstituted lower alkyl group, X is a substituted or unsubstituted amino, lower alkoxy, substituted phenoxy or sulfo group, Y is --SO2 CH=CH2 or --SO2 CH2 CH2 Z, in which Z is a group capable of being split by the action of an alkali, and m is 2 or 3, which is useful for dyeing hydroxyl group- or amide group-containing fiber materials to give dyed products of a brown color having excellent fastness properties with good build-up property.