Recently, the vinyl acetate market is doing well for two reasons: First, affected by the energy-saving and emission-reduction policy, the calcium carbide companies stopped production in large areas, and the downstream polyvinyl alcohol manufacturers produced insufficient vinyl acetate, which increased the outsourcing, resulting in an overall market. The sources of supply were tight and supply was in short supply, which was positive for the vinyl acetate market. Finally, due to the influence of the Asian Games, some manufacturers were limited in their transportation. Because vinyl acetate is a flammable chemical product, the government’s limited transportation policies may have a negative impact on product transportation. . It is understood that the sources of supply in the South China market will be slightly tight, providing strong conditions for the market to continue to rise. It can be seen that the development of vinyl acetate is expected.
Production capacity and production volume of vinyl acetate increase rapidly With the rapid development of construction, textile, and packaging industries in emerging countries and regions, the production capacity and production of vinyl acetate (VAM) in the world have maintained rapid growth. The average annual growth rate in 2003-2008 was 4.6% and 4.9% respectively. In 2008, the global total production capacity of vinyl acetate was 6.51 million t/a, and the output was 5.4 million tons. Among them, Asia is the largest VAM producing region, with a production capacity of 3.39 million t/a, accounting for 52% of the world's total production capacity; followed by North America, accounting for 32%; Western Europe, 13%; and other regions, 3%. Due to different resource structures, production companies in North America, Western Europe, Japan, South Korea, Singapore, and other countries and regions basically adopt the petroleum ethylene process, while North Korea and India use the calcium carbide acetylene process. In China, Russia, Western Europe and other countries and regions, The craft coexists.
Vinyl acetate is mainly used as a monomer, but the consumption patterns in different countries and regions are not the same. The United States and Western Europe are mainly used for the production of polyvinyl acetate emulsions, while Japan is mainly used for the manufacture of polyvinyl alcohol. In the coming years, the consumption of vinyl acetate, polyvinyl butyral and ethylene-vinyl acetate copolymers will show a rapid growth.
Asia becomes a consumer center for vinyl acetate From the perspective of the global market, the development of the vinyl acetate industry is basically healthy, and supply growth and demand increase remain roughly balanced. From 2007 to 2010, the average annual growth rate of global production capacity is estimated to be 8.6%, and the annual growth rate of demand is 6.5%. The industry average operating rate is about 83%. In the coming years, the overall supply and demand situation in the global market will be good, and the operating rate will also be maintained at a reasonable level. To be sure, Asia has become a global vinyl acetate production center, with new production capacity mainly concentrated in Asia. The share of Asia's vinyl acetate production capacity in global production will increase from 50.7% in 2007 to 60.2% in 2010.
In 2009, there were more than 10 sets of vinyl acetate production facilities in China, with a total production capacity of approximately 1.2 million tons and a production volume of approximately 1.1 million tons. Except that Beijing Organic Plant and Shanghai Petrochemical Co., Ltd. each have a set of ethylene gas phase method, Sichuan Vinylon Plant has a set of natural gas acetylene devices, other manufacturers use the method of calcium carbide acetylene, and the proportion of calcium carbide acetylene method exceeds 60%.
The rapid development of vinyl acetate technology The current production process of vinyl acetate ethylene and acetylene two. The ethylene process uses ethylene and acetic acid as raw materials, and is subjected to catalytic oxidation and separation to obtain vinyl acetate products. The acetylene method uses acetylene and acetic acid as raw materials and zinc acetate on activated carbon as a catalyst to obtain a reaction.
Progress in the synthesis of other vinyl acetates In the 1950s, the Celanese Company of the United States used acetaldehyde and acetic anhydride as raw materials to synthesize 1,1-diethylene diacetate in the liquid phase, and then pyrolyzed it into vinyl acetate and acetic acid, due to a long process flow. There are many by-products and high energy consumption for separation and purification is eliminated. Afterwards, two processes of ethylene and acetylene were formed from raw materials. In the 1970s, the oil crisis changed people's attitude toward coal chemical industry. In the early 1980s, the research and development of organic chemical products using carbon monoxide as the raw material made great progress. The research on vinyl acetate synthetic route is no exception. . In the United States, Halcon and Air Products have jointly studied the synthesis of acetic anhydride and vinyl acetate from carbon monoxide. The first step of the process is the reaction of methyl acetate and carbon monoxide to produce acetic anhydride; the second step is the hydrogenation of acetic anhydride to produce 1,1-diethylene diacetate and ethylene glycol diacetate; The above two intermediates will be pyrolyzed into vinyl acetate and acetic acid; Japan's Mitsubishi Gas will improve the Halcon process by synthesizing acetaldehyde from methanol and carbon monoxide, and synthesizing acetic anhydride from methyl acetate and carbon monoxide, followed by acetaldehyde and vinegar. Anhydride synthesis vinyl acetate. The synthesis of vinyl acetate from raw materials has a wide range of development prospects due to its wide range of raw materials.
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