Preparation method of black reactive dye with high color fixing rate

The invention relates to a preparation method of a black reactive dye with high color fixing rate. The preparation method comprises the following steps: Step 1, an acid coupling reaction is carried out to obtain an acid coupling substance; Step 2, an alkali coupling reaction is carried out to obtain...

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1. Verfasser:	YANG JIQUN
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMISTRY DYES LAKES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS POLISHES
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creator	YANG JIQUN
description	The invention relates to a preparation method of a black reactive dye with high color fixing rate. The preparation method comprises the following steps: Step 1, an acid coupling reaction is carried out to obtain an acid coupling substance; Step 2, an alkali coupling reaction is carried out to obtain an alkali coupling substance, and uniform stirring is carried out for later use; Step 3, 100 g of an ice-water mixture and 30ml of technical hydrochloric acid are added into a beaker, the mixture is added at the temperature of 0-15 DEG C for 30 min while stirring is carried out, potassium iodide starch paper is controlled to bluish at the temperature of 5-20 DEG C, reaction lasts for 2 h, and sulfamic acid is used to eliminate excess nitrous acid so as to obtain a diazonium salt suspension; the above diazonium salt suspension is added into the acid coupling substance, uniform stirring is carried out, temperature is controlled to 15-20 DEG C and the alkali coupling substance is added, pH is adjusted to 4.5-6.5, stirring is carried out for 1-3 h, and direct spray-drying is carried out to obtain the black dye.
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The preparation method comprises the following steps: Step 1, an acid coupling reaction is carried out to obtain an acid coupling substance; Step 2, an alkali coupling reaction is carried out to obtain an alkali coupling substance, and uniform stirring is carried out for later use; Step 3, 100 g of an ice-water mixture and 30ml of technical hydrochloric acid are added into a beaker, the mixture is added at the temperature of 0-15 DEG C for 30 min while stirring is carried out, potassium iodide starch paper is controlled to bluish at the temperature of 5-20 DEG C, reaction lasts for 2 h, and sulfamic acid is used to eliminate excess nitrous acid so as to obtain a diazonium salt suspension; the above diazonium salt suspension is added into the acid coupling substance, uniform stirring is carried out, temperature is controlled to 15-20 DEG C and the alkali coupling substance is added, pH is adjusted to 4.5-6.5, stirring is carried out for 1-3 h, and direct spray-drying is carried out to obtain the black dye.</description><language>eng</language><subject>ADHESIVES ; CHEMISTRY ; DYES ; LAKES ; METALLURGY ; MISCELLANEOUS APPLICATIONS OF MATERIALS ; MISCELLANEOUS COMPOSITIONS ; MORDANTS ; NATURAL RESINS ; ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES ; PAINTS ; POLISHES</subject><creationdate>2015</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20150527&DB=EPODOC&CC=CN&NR=104650617A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20150527&DB=EPODOC&CC=CN&NR=104650617A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>YANG JIQUN</creatorcontrib><title>Preparation method of black reactive dye with high color fixing rate</title><description>The invention relates to a preparation method of a black reactive dye with high color fixing rate. 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The preparation method comprises the following steps: Step 1, an acid coupling reaction is carried out to obtain an acid coupling substance; Step 2, an alkali coupling reaction is carried out to obtain an alkali coupling substance, and uniform stirring is carried out for later use; Step 3, 100 g of an ice-water mixture and 30ml of technical hydrochloric acid are added into a beaker, the mixture is added at the temperature of 0-15 DEG C for 30 min while stirring is carried out, potassium iodide starch paper is controlled to bluish at the temperature of 5-20 DEG C, reaction lasts for 2 h, and sulfamic acid is used to eliminate excess nitrous acid so as to obtain a diazonium salt suspension; the above diazonium salt suspension is added into the acid coupling substance, uniform stirring is carried out, temperature is controlled to 15-20 DEG C and the alkali coupling substance is added, pH is adjusted to 4.5-6.5, stirring is carried out for 1-3 h, and direct spray-drying is carried out to obtain the black dye.</abstract><oa>free_for_read</oa></addata></record>
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subjects	ADHESIVES CHEMISTRY DYES LAKES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS POLISHES
title	Preparation method of black reactive dye with high color fixing rate
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