Breaking through foreign technology monopoly for 70 years and picking up the "Pearl" on polyurethane crown

Adipose / cycloisocyanate (ADI) is the core raw material for the production of high-grade polyurethane The polyurethane material prepared by Adi has become the key basic material to support the development of aerospace industry, high-end equipment, automobile and other industries China has approved several sets of imported technology to build ADI devices, all of which are stranded due to foreign technology blockade After 17 years of unremitting efforts, Wanhua chemical finally broke the technology monopoly of foreign countries for 70 years, successfully developed the ADI whole industry chain manufacturing technology, and won the "Pearl" of polyurethane industry crown At the petrochemical industry science and Technology Innovation Conference held last week, the executive vice president of Wanhua Chemical Co., Ltd described the development process of the whole industrial chain manufacturing technology of fat / cycloisocyanate, the achievement of the special prize of science and technology progress ADI product technology blocked Polyurethane is a high polymer which is produced by the reaction of MDI, TDI and Adi with polyols and various auxiliaries Isocyanate is the most core raw material of polyurethane, among which aliphatic isocyanate is called ADI Its representative varieties are isophorone diisocyanate (IPDI), 16 hexamethylene diisocyanate (HDI) and dicyclohexylmethane diisocyanate (H12MDI) The polyurethane material prepared by ADI has excellent anti-aging, sun exposure and yellowing resistance It is a key material for supporting the development of aerospace industry, high-end equipment, automobile and other industries It is also the key raw material for the upgrading of traditional industries such as coatings, adhesives, artificial leather and so on Among the three representative varieties of ADI, IPDI is the most ideal solidifying agent for solid rocket propellants, which has been restricted by Paris overall planning committee to export to China for a long time Due to the blockade of foreign technologies and products, China can only be forced to adopt TDI curing system with poor performance; H12MDI is the key monomer for preparing transparent armored bulletproof glass, high-speed train front shield glass, optical lens and high-grade spandex Due to the long process of ADI manufacturing industry chain and the high difficulty of technology development, over 70 years of industrialization, only four companies in the world can produce HDI, including kostrong and BASF, conrui in France, and Nanyang Huacheng in Japan, and only two companies, Evonik and kostrong, can produce IPDI and H12MDI Since the beginning of basic synthesis research, China has approved the introduction of technology for the construction of ADI devices several times, all of which have been stranded due to foreign technology blockade "We also planned to acquire a set of foreign devices in order to digest and absorb them, but we were the first multinational company to buy and dismantle them, and banned the sale of ADI raw materials to Wanhua." Wanhua chemical executive vice president said In view of the important role of ADI in national defense and national economic development, Wanhua has made unremitting efforts for 17 years ADI manufacturing includes three industrial chains: HDI and adducts, ip-ipn-ipda-ipdi and mda-h12mda-h12mdi "Different from the previous digestion absorption and re innovation in the development of MDI technology, when we selected ADI gas phase photo gasification technology route around 2000, there was no technical information available for reference and reference, so this technology was started by Wanhua from the basic synthesis research in the laboratory, on this basis, a systematic conceptual design was formed, and finally the industry was developed after the engineering experiment verification It's a set of technology " Wanhua chemical executive vice president said Develop four core technologies according to the introduction of executive vice president of Wanhua chemical, the ADI whole industrial chain manufacturing technology developed by Wanhua mainly includes four core technologies: phosgenation, ammoniation hydrogenation, catalytic hydrogenation and reactive distillation One is the general technology of isocyanate production by gas phase photo gasification Wanhua has developed the general technology of gas-phase photo gasification to isocyanate by improving the photo gasification reaction Compared with the liquid-phase method, the yield of this technology is increased by 3% ~ 8%; the amount of solvent is reduced by 50%, which is more energy-saving; the amount of phosgene is reduced by 30%, and the reaction is safer Second, common technology of ammoniation and hydrogenation Wanhua independently developed a composite nano hydrogenation catalyst with high selectivity and high conversion rate Under 150 atmospheres, the yield of IPDA reached 95.5%, the content of aminonitrile was less than 0.4%, and the catalyst could operate stably for more than 2 years A multi-stage fixed bed hydrogenation reactor and a special auxiliary system were developed, which further improved the yield of IPDA to more than 99%, and the content of aminonitrile to less than 0.03% The third is benzene ring high activity catalytic hydrogenation technology The hydrogenation pressure of this technology is low, and the investment cost of the unit can be reduced The newly developed supported nano Ru Rh catalyst can reduce the catalyst consumption by 1200 yuan per ton of product, improve the hydrogenation selectivity and application performance Using the catalytic system and the autoclave hydrogenation process, Wanhua has developed industrial technologies for HTDA, h6xda, cyclohexylamine and other products Fourth, reactive distillation coupling technology Wanhua realized the high-efficiency coupling of reaction and distillation through the development of staged condensation reaction distillation process, which made the one-way conversion rate of acetone reach 10% ~ 15%, and the selectivity of Isophorone reach 90% At the same time, reaction heat was used for product distillation, with remarkable energy saving Relying on these innovative achievements, Wanhua has successively built 50000 T / a HDI, 15000 T / a IPDI, 10000 t / a H12MDI, 25000 T / a IPDA, 10000 t / a h12mda and other industrial devices, and has built the world's most complete variety, the most complete industrial chain and the leading technology ADI characteristic industrial group At present, the market share of Wanhua ADI series products ranks the second in the world As of November 2019, the company has achieved sales revenue of 12 billion yuan and profits and taxes of 5.2 billion yuan The successful implementation of Wanhua ADI project has broken the monopoly of foreign companies on the whole industrial chain manufacturing technology of ADI series products for up to 70 years, making Wanhua the only enterprise in the world that has mastered mda-h12mda-h12mdi, ip-ipn-ipda-ipdi, HDI and derivatives and other core technologies in the whole industrial chain, achieving the goal of Aerospace military industry, high-end equipment and other fields Key raw materials localization independent supply, to build a national heavy equipment to provide a strong support.