Para-phenylenediamine (PDD) market supply and demand are “double rising”. In the future, local companies will need to continue to optimize production processes.

Para-phenylenediamine, also known as Ursine D, or PDD for short, is an organic compound with the chemical formula C6H8N2. It appears as a white to lavender solid, slightly soluble in water, and soluble in ethanol, ether, benzene, chloroform, and acetone. wait.

Paraphenylenediamine is a widely used chemical intermediate that can be used in azo dyes, sulfur dyes, acid dyes, and direct dye manufacturing scenarios; it can be used in aramid 1414 (para-aramid), polyamide-imine resin, Paraphenylene diisocyanate (PPDI) and other synthetic resin production scenarios; can be used in the production of antioxidants for natural rubber and diene-based synthetic rubber; can be used in chemical industries such as epoxy resin curing agents, petroleum additives, flame retardants, and carbon black treatment agents. Product production scene.

According to the “China Paraphenylenediamine (PDD) Industry Market Monitoring and Future Development Prospects Research Report 2023-2027” released by the Industrial Research Center shows that p-phenylenediamine can be widely used in dyes, resins, chemicals, rubber and other fields. In recent years, its market development has been accelerating against the background of the continuous expansion of its application fields. Among them, para-aramid is the main demand end of para-phenylenediamine. As the domestic production capacity of para-aramid continues to increase, the demand for para-phenylenediamine continues to increase. At present, my country’s Taihe New Materials, Sinochem International, Yizheng Chemical Fiber and other companies have para-aramid production capabilities, and it is expected that by 2024, Taihe New Materials’ para-aramid production capacity will reach 20,000 tons. Against this background, my country’s demand for paraphenylenediamine will exceed 50,000 tons in 2022, and the demand space is vast.

The main p-phenylenediamine production companies in my country include Fangyuan New Material Technology, Chizhou Fangda Technology, Anhui Goldman Chemical Co., Ltd., Huaian Hengyang Chemical Technology Co., Ltd., Zhongfang Special Fiber Co., Ltd., Zhejiang Longsheng Group Co., Ltd., Inner Mongolia Kailidi Chemical Co., Ltd., Nantong Luo Chemical Co., Ltd. Sen Chemical, Taixing Shangshi Chemical, Zhejiang Baosheng Chemical, Dingyuan Shangshi New Materials, etc., as local companies continue to upgrade their technology, my country’s p-phenylenediamine production is continuing to increase. Overall, my country’s p-phenylenediamine market shows a “double increase” trend in supply and demand.

There are various production methods for p-phenylenediamine, including p-dihalobenzene ammonialysis method, p-nitroaniline reduction method, terephthalic acid dichloramide rearrangement method, p-nitrochlorobenzene one-step ammonialysis reduction method, p-aminoazo Generated by benzene hydrogenation method and other methods. Among them, the p-nitroaniline reduction method is currently the most common method for the industrial production of p-phenylenediamine in my country. It uses iron powder and hydrochloric acid as raw materials, puts the iron powder into hydrochloric acid to generate p-nitroaniline, and then drops concentrated hydrochloric acid. A method for producing p-phenylenediamine through reduction reaction. This method has the advantages of mature technology, safety and reliability, but also has the disadvantages of environmental pollution and low economic benefits.

Industry analysts said that in the future, under the background of increasing domestic environmental protection supervision, p-phenylenediamine Enterprises also need to continue to optimize production processes or seek green and environmentally friendly production methods with high economic benefits, thereby promoting continuous improvement in output and accelerating industry development.