Unit reactions such as sulfonation, nitration, and reduction are mainly carried out using conventional processes. The single homogenization of the products in the intermediate industry led to fierce market competition and serious price reduction. The domestic dye intermediate production enterprises are small in scale and single in structure, and there are only a handful of enterprises that form economies of scale.
Statistics show that there are about 2,000 varieties of dyes that can be produced in China, and there are more than 800 varieties of dyes produced per year. The output of intermediates is about 600,000 tons. From the perspective of varieties, China exports nearly 160 dye intermediates each year. Among them, benzene and naphthalene are the most common, accounting for 50% and 26% respectively; 2-Methylanthraquinone Refined and heterocyclic intermediates account for about 14% and 10% respectively.
At present, China's dye intermediate industry has achieved a lot of achievements, but there are still many problems in the development of dye intermediates. For example, the quality of some dye intermediates is not high, the technical level is low, and the development of dye intermediates is weak and needs to be strengthened.
First, the problem of innovation: unit reactions such as sulfonation, nitrification and reduction mainly adopt traditional processes.
Second, the market problem: the single industry and homogenization of the intermediate industry lead to fierce market competition, and the phenomenon of price reduction is serious.
The third is structural problems: domestic dye intermediate production enterprises are small in scale and single in structure, and there are only a handful of enterprises that form economies of scale.
First, increase investment in research and development of dye intermediates;
The second is to accelerate industry integration;
The third is the investigation, the information first