Recently, "Synthesis of High-Performance Polysiloxane and Comprehensive Utilization of Chlorosilane" won the first prize of the 2019 Science and Technology Progress Award of the China Petrochemical Association. Project Enterprise: Dr. Wang Yuelin, Chairman and Dean of the Research Institute of HBHF Silicon Material Technology Co., Ltd., said in the report: This is a new chapter in the development of the silicone industry cluster and innovative circular economy!
"The key technologies and industrialization projects for the synthesis of high-performance polysiloxane and the comprehensive utilization of chlorosilane broke the technical monopoly of foreign countries on high-performance polysiloxane, high-purity silicone oil and high-grade white carbon black, and accelerated the downstream products of silicone The process of functionalization and refinement has realized green, recyclable and clean production of the industry. Many research and development units involved in the research and development of the project have also achieved efficient recycling of raw material production links, forming a development model for the silicone industry cluster. "
Overcome 4 key technologies
The project company: Dr. Wang Yuelin, chairman of HBHF Silicon Materials Technology Co., Ltd. and the dean of the research institute, said in an interview: "Before the implementation of the project, the key technologies and comprehensive utilization of polysiloxane synthesis and by-product chlorosilane production as core materials in China The high-end market is monopolized by a few multinational companies, which limits the development of China's silicone industry. After years of research, we have produced hydrophilic and hydrophobic gas-phase process white carbon in polysiloxane, high-purity silicone oil, and silicone by-products. Made a major breakthrough in black technology and successfully achieved industrialization. "
This project conquered four key core technologies: the key technology for the direct synthesis of ultra-low viscosity hydroxy-terminated polysiloxane with dimethyl dichlorosilane hydrolysate, and the production of vinyl-terminated polymer with high vinyl chain mole fraction by gradient heating method New technology of methyl vinyl siloxane, continuous preparation technology of high-purity silicone oil and key equipment, gas-phase white carbon black used for stable deacidification production of silicone rubber, and key technology of continuous online surface treatment.
Chairman and Dean of the Institute Wang Yuelin also said: "The research and development cycle of the project began in August 2009 and ended in March 2015; the industrialization implementation phase began in 2011 and ended in 2016, spanning 9 years before and after: HBHF Silicon Materials Technology Co., Ltd. has an annual output of 8,000 tons of hydrophilic gas-phase process white carbon black and an annual output of 1,000 tons of hydrophobic gas-phase process white carbon black. The improvement of the silicon industry chain and the development of high quality have set an example. "
Core raw materials break the monopoly
"The most important contribution of this project is to solve the problem that the production technology of key raw materials for silicone rubber has a huge gap with the market demand for high-end silicone rubber in clean production, product performance, quality standards, etc., and it is unable to participate in international competition." The successful implementation of silicon rubber, the core material of the most important product in the silicone industry, has completely achieved localization, and eliminated the risk of high-end fumed silica and other key materials being cut off by foreign companies. , High efficiency, high-end "provides the best practice program.
Specifically, dimethyl dichlorosilane hydrolysate directly synthesizes the key technology of ultra-low viscosity hydroxyl-terminated polysiloxane, which eliminates the traditional preparation process that requires hydrolysate cracking to produce dimethyl carbonate (DMC) To reduce production energy consumption, reduce pollutant emissions, and achieve a higher level of clean preparation process. High-purity silicone oil continuous production technology, compared with the traditional batch process, production efficiency is increased by about 20%, and energy consumption is reduced by about 10%. The new gas-phase white carbon black process uses organic silicon by-products such as monomethyltrichlorosilane / hydrochlorosilane / azeotrope to increase the level of comprehensive utilization of by-products and bring new profit growth points for enterprises.
The project was highly affirmed by the appraisal committee led by Academician Jianxi Gao of the Chinese Academy of Engineering: The project achieved a breakthrough in the production technology of the core raw materials of silicone rubber, and reached the international advanced level overall, and some were at the international advanced level.
Establish a circular production model
"The project was completed by HBXF Chemical Group Co., Ltd., Wuhan Engineering University, HBHF Silicon Material Technology Co., Ltd., GZJB Technology Industrial Co., Ltd. and other units, and it is the crystallization of the cooperation of upstream and downstream industries of silicone." Wang Yuelin introduced, before The domestic silicone monomer production environment faces weaknesses such as low process fit, low by-product comprehensive utilization rate, and low economic benefits, and is at a disadvantage in the global competitive landscape.
During the research and development and implementation of the project, a number of key research units have focused on optimizing the production process and preparation technology of key raw materials for silicone rubber, while achieving energy saving and consumption reduction, improving product quality and production efficiency, and achieving efficient recycling of raw material production links .
For example, organic silicon monomer by-products are a major problem restricting production enterprises. HBHF Silicon Materials Technology Co., Ltd. uses organic silicon monomethyltrichlorosilane, hydrogen-containing monomers, low boilers and azeotropes as by-products. The raw material produces fumed silica, and the produced fumed silica is the most important reinforcing filler for silicone rubber, and it is also a new chemical material with wide application and high economic value. This key technology transforms the harmful by-products produced upstream of the silicone into the indispensable fumed silica products in the silicone industry chain, creating a highly comprehensive utilization of by-product chemical ecology.
"This ecological model has not only helped silicone monomer enterprises solve their worries, but also established a silicone recycling production model; it has also achieved a higher level of green production and formed an" efficient, low consumption, clean, and value-added "silicone industry Cluster development model. "-" China Chemical News "reporter
"Synthesis of High-Performance Polysiloxane and Comprehensive Utilization of Chlorosilane" lasted nine years, breaking through the hard work of experts and enterprises in various fields. The competing reports in the media also confirmed the important contribution of this achievement to the efficient development of the silicone industry!