119-28-8Relevant articles and documents
Preparation method of clean product 1, 6 and 1,7 mixed
-
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 vinylsulfone type and pyridinium type fiber reactive groups
-
, (2008/06/13)
A polyazo compound of the following formula, STR1 wherein X is STR2 --NR2 R3, --OR4 or --SR5, in which R1 is hydrogen or alkyl, R2, R3, R4 and R5 are each hydrogen, alkyl, phenyl, naphthyl or benzyl, A is phenylene, naphthylene or alkylene, Z is a fiber-reactive group of --SO2 CH=CH2 or --SO2 CH2 CH2 Z' in which Z' is a splittable group, Y is pyridinio, 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.
Polyazo dye compounds having plural vinylsulfone type fiber reactive groups in one molecule
-
, (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.
Bisazo brown reactive dye
-
, (2008/06/13)
A brown reactive dye represented by a free acid of the formula, STR1 wherein R is a hydrogen atom or a C1 to C4 alkyl group, X is --SO2 CH2 CH2 Cl, --SO2 CH=CH2, --SO2 CH2 CH2 OSO3 H or --SO2 CH2 CH2 OPO3 H2, rings A, B and C are each a benzene or naphthalene ring which may have other substituent, m is 0 to 3 and n is 0 to 1. This dye is suitable for dyeing cellulose fibers brown to afford dyeings superior in fastnesses, acid stability, build-up property and level dyeing property.
Fiber-reactive disazo brown dye having vinylsulfone-type reactive group
-
, (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.
Reactive yellow dye having both monochlorotriazinyl and vinylsulfone type reactive groups
-
, (2008/06/13)
The compounds represented, in the form of free acid, by the following general formula (I): STR1 (wherein A is STR2 (wherein R3 and R4 are each hydrogen or a methyl, ethyl, methoxy, ethoxy, acetylamino, propionylamino, benzoylamino or ureido group, and R5 and R6 are each hydrogen or a methyl or methoxy group), R1 and R2 are each hydrogen or a methyl, ethyl or sulfomethyl group, X1 and X2 are each hydrogen, chlorine or a methyl, methoxy, carboxyl or sulfonic acid group, m is a number of 0, 1 or 2, and n is a number of 1 or 2, provided that the sum of m and n is 1, 2 or 3). These compounds are capable of dyeing cellulose fibers in yellow with excellent color fastness to hypochlorite, light, perspiration and sunlight and high acid stability.
