Method for synthesizing phthalocyanine blue dye

Abstract

The invention discloses a method for synthesizing a phthalocyanine blue dye represented by a formula (1). The method comprises the following steps: (a) mixing ammonium chloride, cobalt chloride, a catalyst and a reaction solvent dichlorotoluene, heating and dehydrating; (b) cooling the mixture obtained in the step (a), then adding phthalic anhydride and urea, dehydrating, and then heating for reaction; (c) distilling the mixture obtained in the step (b), and recovering dichlorotoluene to obtain a crude product cobalt dichloride phthalocyanine; and (d) carrying out a reaction on the crude product cobalt dichloride phthalocyanine obtained in the step (c) with N,N-dimethyl-1,3-propane diamine, and then carrying out filter pressing, water washing and drying, so as to obtain the cobalt dichloride phthalocyanine. The synthesis method has the characteristics of simple production process, low three-waste yield, high product yield and good quality, and has good economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of fine chemical production, and in particular relates to a synthesis method of phthalocyanine blue dye. Background technique [0002] Phthalocyanine blue IBN is an important phthalocyanine dye with bright color, excellent chlorine fastness, light fastness and washing fastness. In printing and dyeing, it is mainly used in dyeing or printing in the production of imitation wax and real batik. It has a special color, which is bright blue with red light. [0003] The traditional synthesis process of phthalocyanine blue IBN is relatively complicated, and mainly has the following disadvantages: (1) The cobalt chloride used in the cobalt phthalocyanine synthesis process is generally anhydrous cobalt chloride, and most of the supplies on the market are chlorine hexahydrate Cobalt chloride, the cobalt chloride hexahydrate obtained from outsourcing needs to be dried in an oven to remove crystal water to obtain anhydr...

AI Technical Summary

Problems solved by technology

[0003] The traditional synthesis process of phthalocyanine blue IBN is relatively complicated, and mainly has the following disadvantages: (1) The cobalt chloride used in the synthesis process of cobalt phthalocyanine is generally anhydrous cobalt chloride, and most of the supplies on the market are chlorine hexahydrate Cobalt chloride, cobalt chloride hexahydrate obtained from outsourcing needs to be dried in an oven to remove crystal water to obtain anhydrous cobalt chloride

However, cobalt phthalocyanine consumes a large amount of materials in these processes, which not only increases energy consumption, but also produces a large amount of high-COD, high-ammonia-nitrogen wastewater and a large amount of ammonia-containing waste gas

(3) In the reaction stage of dichlorocobalt phthalocyanine and N,N-dimethyl-1,3-propanediamine, a heating and cooling process is required, which increases the reaction energy consumption and the complexity of operation, and is also easy to increase Escape of the reaction solvent

[0004] At present, the requirements for environmental protection are getting higher and higher, and the production of highly polluting dyes is becoming more and more difficult to carry out

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