Due to the characteristics of various varieties, bright colors and good tinting strength, organic pigments are widely used in industrial fields such as ink printing, coatings, plastics and rubber, and become indispensable coloring materials for the production of various industrial products. However, with the increasing awareness of environmental protection, people's requirements for the safety and environmental protection of dyeing and pigment products are also increasing. The United States, Europe, Japan and other countries have established institutions to study the ecological safety and toxicology of dyes and pigments, specializing in understanding and researching the impact of dyes and pigments on human health and the environment. The relevant labor safety and health management departments in my country are also very concerned about this issue. Pay attention to
High-performance organic pigments show more excellent physical and chemical properties when used. They not only have the advantages of bright colors and high color strength of classic organic pigments, but also meet the requirements of light resistance, heat resistance, and Solvent and other higher performance requirements have become the development trend of organic pigments.
High-performance organic pigments have high research and development costs and technical content, complex processes, and long marketing cycles, but they have higher added value. Therefore, people began to turn to high-performance organic pigment substitutes with excellent performance. It is an inevitable trend in the development of the industry to develop new varieties of green and environmentally friendly dyes and pigments to replace harmful varieties.
Solvent-based high-performance organic pigment fully enclosed filter washing and drying machine multi-functional three-in-one process flow
The fully enclosed production process of solvent-based high-performance organic pigments includes: (1) preparing a diazonium salt solution; (2) adding the diazonium salt solution to the suspension for coupling reaction; (3) adding rosin soap to the product of the coupling reaction and emulsifier fatty alcohol polyoxyethylene ether, use fully enclosed three-in-one to filter, wash, and dry to obtain crude pigment dry powder; (4) add polar solvent to the filter washing and drying machine equipped with crude dry powder, Under the condition of 0-50°C, carry out pigmentation treatment, filter, wash and dry to obtain the finished pigment.
The coloring power of the pigment prepared by the method is obviously improved, and the comprehensive application performance of the pigment is improved.
The solvent-based high-performance organic pigment fully-sealed post-treatment process has the following advantages:
(1) Pigmentation is carried out under low temperature conditions, reflux device is omitted, the solvent smell is small in the production process, and the solvent evaporation loss is relatively small;
(2) The concentration of solvent in the pigmented mother liquor is high, which is conducive to solvent recovery, saves the cost of solvent distillation and recovery, and the loss of solvent is small;
(3) The obtained pigment has high tinting strength, and the tinting strength of the water-based paint is more than 10% higher than that of the external standard, which can meet the needs of applications with higher color strength requirements. In addition, under the same tinting strength, the surface treatment amount of the pigment is correspondingly increased. Reduced raw material costs.
(4) On the basis of satisfying the various application properties of pigments, the fully enclosed post-treatment process further improves the tinting strength, reduces production costs and increases economic benefits.
Solvent-based high-performance organic pigment fully enclosed filter washing and drying machine multi-functional three-in-one technical advantage
According to the technological requirements of advanced liquid-solid separation and drying system for clean production and intrinsic safety of dyes and dye intermediates, the fully enclosed reaction crystallization, filtration and drying multifunctional equipment developed by ZhangHua Machinery integrates filtration, washing, solvent recovery, drying and dust collection. In one body, the filtration and drying efficiency is high, and the operation is convenient. The performance of the multi-function three-in-one filter washing and drying machine is obviously better than other traditional filter drying equipment, and has the following advantages:
(1) Safety and environmental protection
The fully enclosed reaction crystallization filtration drying multifunctional equipment can be designed as a fully enclosed operating system, which can completely avoid the pollution of the operating environment air by solvents during the production process, and at the same time reduce the occurrence of poisoning accidents caused by contact with toxic substances. This advantage is even more crucial in today's increasingly loud voices for environmental protection and labor protection.
(2) Fully recovered
Materials and solvents are almost completely recovered, avoiding waste and pollution caused by material leakage and solvent volatilization, which has great economic benefits, especially when dealing with high-value materials and solvents.
(3) Save manpower
A non-technical person who has undergone simple training can complete the operation. Opening, closing, automatic feeding and automatic discharging do not require technical personnel to monitor.
(4) Clean thoroughly
The multifunctional filter drying equipment has the function of resuspension, and the filter cake can be washed very thoroughly.
(5) Simultaneous drying
Filtration, washing and drying can be done in one system.
(6) Continuous operation
Filtration and drying can be performed in a continuous system.
The wet filter cake that does not need to be treated can be unloaded directly; if further drying is required, the wet filter cake is directly discharged from the filter into the dryer, and can be mechanically transported to the weighing and packaging sections after drying.
The research and development of the multi-functional three-in-one fully enclosed filter washing and drying machine meets the environmental protection production requirements of solvent-based high-performance organic pigments, and is an inevitable trend to eliminate technological barriers and promote the optimization and upgrading of the industrial structure of the high-performance colorant industry. ZhangHua's multifunctional three-in-one mechanical filter, washing and drying machine will definitely promote the development of the domestic dye and pigment industry, and meet the needs of industrial development for the improvement of the grade and performance of dye and pigment products, environmental protection and scale expansion.