Method for synthesizing phthalocyanine blue dye

A synthesis method and phthalocyanine blue technology, applied in the field of phthalocyanine blue dye synthesis, can solve the problems of increased energy consumption, high ammonia nitrogen waste water, complex synthesis process flow, etc., and achieve low consumption of raw materials, good product quality and simple process. Effect

CN111548644AActive Publication Date: 2020-08-18ZHEJIANG RUIHUA CHEM
4 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-08-18

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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...

Examples

Embodiment

[0033] at 10m 3 Put 4000 kg of mixed dichlorotoluene (content ≥ 99.5%) into the cobalt phthalocyanine glass-lined reactor, start stirring, and put in 240 kg of weighed ammonium chloride (content ≥ 99.0%), cobalt chloride hexahydrate ( Content ≥ 24.0% (calculated as cobalt)) 335 kg, ammonium molybdate (content ≥ 99.0%) 19.5 kg, then heat up to about 160°C to remove the moisture in the raw materials. After the dehydration is basically complete, the temperature is naturally lowered to below 130°C, 840 kg of phthalic anhydride (content ≥ 99.0%) is fed from the feeding port of the reaction pot, and 1440 kg of urea (total nitrogen content ≥ 46.6%) is added after the temperature is lower than 110°C . After the temperature rises, the temperature is maintained at 192° C. to 197° C. and the reaction is kept for about 12 hours to complete the reaction. Then put the material into a rake dryer for vacuum rake dry distillation to recover mixed dichlorotoluene, and the rake dry temperature...