It is predicted that by 2006 China's total market demand for trimethylolpropane (TMP) will reach 26,000 tons. Since the domestic TMP production capacity at the end of 2004 was only about 7,000 tons, the annual output was only about 2,000 tons lower. Compared with the consumption volume of 21,000 tons in the current year, the supply was far less than needed. Therefore, although many installations have been put into construction this year, by the end of 2006, China's trimethylolpropane will still be unable to reverse a large number of imports.
At present, the major TMP manufacturers in China are: Beijing Beilang Organic Chemical Plant (1000 tons annual production capacity, the same below), Shenyang Shenyang Applied Technology Experimental Plant (500 tons), Hebei Dahua Organic Chemical Factory, Qinhuangdao City (450 tons ), Jiangsu Danyang Third Fine Chemical Factory (300 tons), Shandong Zibo Yongliu Chemical Industry Co., Ltd. (300 tons) and Jilin Petrochemical Company (5000 tons).
In addition, there are many proposed, new or expanded TMP production facilities in China. For example, Heilongjiang Jidong Huaxin Chemical Co., Ltd. intends to build a new 10,000-ton/year production plant, Dahua Organic Chemicals Plant intends to expand 450 tons/year of equipment to 5000 years/ton, and Hubei Zhongtian Jingmen Chemical Co., Ltd. plans to build 5,000 tons. Annual production facilities, Beijing Dongfang Chemical Group plans to build a 20,000-ton/year production plant, Jilin Longtan Economic Development Zone plans to build a new 10,000-ton/year production plant, and Northwest Yongxin Chemical Co., Ltd. plans to build a new 5,000-ton/year production facility. Hunan Hengyang Sanhua Industrial Co., Ltd. plans to build 2,000 tons/year of production equipment. However, due to capital, technology, raw materials and other reasons, the above projects are unlikely to be put into operation before 2006. Therefore, by 2006 China's TMP production still could not meet the market demand, and the products were still mainly dependent on imports.
In recent years, China’s TMP imports have been rising year by year. In 1995, the import volume was 2,957 tons, and in 2000 it reached 15,200 tons. The average annual growth rate of imports was about 38.7%. In 2004, the import volume was 19,000 tons.
China's TMP is mainly used for the synthesis of high-grade alkyd resins and polyurethane coatings, and also for the production of plasticizers. In 2004, the consumption of trimethylolpropane in China was approximately 21,000 tons. The consumption of high-grade alkyd resin and polyurethane coatings accounted for approximately 76.2% of the total TMP consumption. The plasticizer accounted for approximately 21.4%. About 2.4% of other aspects.
The alkyd resin produced by using TMP instead of glycerol, neopentyl glycol, pentaerythritol and other polyols has better hydrolysis resistance, oxidation resistance, alkali resistance and thermal stability, and also has bright color, strong color retention, and dryness. With such advantages as rapidity, it is particularly suitable for the production of road marking paints and varnish, as well as for the production of finishes for automobiles, refrigerators, washing machines, bicycles, aviation and navigation equipment. The alkyd resin synthesized from trimethylolpropane has good compatibility with amino resin and can be used as raw material for polyurethane coatings, and also can be used as high-grade paint for urethane self-drying paints and drying paints.
In recent years, China's paint manufacturing companies have continuously developed various high-grade paints, and introduced foreign capital and foreign advanced technology to produce a variety of paints and intermediates, so that the trimethylol propane industry has been developing rapidly. In 2004, China’s paint output was approximately 3.6 million tons, and China’s TMP consumption in the coatings sector was approximately 16,000 tons. Among them, the consumption of polyurethane paint is about 0.4 million tons, and the consumption of alkyd resin paint is about 12,000 tons. China's auto industry is entering a phase of rapid development, and it is expected that the demand for high-grade coatings for automobiles will increase at an average annual rate of 15%, and will become the most promising area for TMP. With the development of the household appliance industry and shipping and transportation industries, the demand for high-grade coatings has become tighter. The annual demand has reached 13% to 14%. Therefore, it is expected that the total demand for trimethylol propane in the synthesis of high-grade alkyd and polyurethane coatings in China will reach approximately 19,000 tons in 2006.
In the production of plasticizers, the demand for polyvinyl chloride in China was about 7 million tons in 2004, and the demand for plasticizer was about 1.8 million tons; the synthetic fiber, cellulose acetate, leather chemicals and paints were plasticized. The total demand for the agent is approximately 1.9 million tons. In total, approximately 4,500 tons of trimethylolpropane was consumed. It is expected that by 2006 the total demand for trimethylolpropane in the plasticizer industry will reach approximately 6,000 tons.
It is expected that by the year 2006, the consumption of trimethylolpropane will be about 1,000 tons in other aspects.
The industrial production of trimethylolpropane in China began in the 1970s. Although it has a history of more than 30 years, the current operating rate of the plant is very low, and most of them are in the state of production suspension or semi-discontinuation. The main reasons are the following:
One is the shortage of raw materials. The raw material for the production of trimethylolpropane is n-butyraldehyde, which is an intermediate for the production of butanol and octanol. At present, only a few companies, such as the Jilin Chemical Company's calcium carbide plant and Qilu Petrochemical Company, produce in China, and the amount of commercial products is very small. Addition of n-butyraldehyde is flammable, transportation is difficult, and it also directly affects the production of trimethylolpropane.
The second is the backward production process. At present, China mainly adopts cross-carnitar law to carry out the production of trimethylolpropane. This method has the disadvantages of large raw material consumption, low product yield, more by-product sodium formate, and poor desalination process, resulting in higher production costs.
Third, product quality can not meet user needs. The hydroxyl value of foreign trimethylolpropane products is generally 37.5%, and the product will not be discolored for a long time. However, the hydroxyl value of the domestically produced products is only 36.5%. Applications in some areas are limited.
The author believes that to solve the problems of small scale, poor quality, limited source of raw materials, high consumption of products, and backward technology of trimethylolpropane in China, we should start from the following four aspects: To increase the catalytic hydrogenation production process Develop, actively improve production processes, reduce production costs, improve product quality; new projects should adopt advanced aldehyde hydrogenation reduction production process; increase the production capacity of n-butyraldehyde to solve the supply of trimethylolpropane production raw materials Problems; The scale of production of new or expanded projects should be more than 10,000 tons.
At present, the major TMP manufacturers in China are: Beijing Beilang Organic Chemical Plant (1000 tons annual production capacity, the same below), Shenyang Shenyang Applied Technology Experimental Plant (500 tons), Hebei Dahua Organic Chemical Factory, Qinhuangdao City (450 tons ), Jiangsu Danyang Third Fine Chemical Factory (300 tons), Shandong Zibo Yongliu Chemical Industry Co., Ltd. (300 tons) and Jilin Petrochemical Company (5000 tons).
In addition, there are many proposed, new or expanded TMP production facilities in China. For example, Heilongjiang Jidong Huaxin Chemical Co., Ltd. intends to build a new 10,000-ton/year production plant, Dahua Organic Chemicals Plant intends to expand 450 tons/year of equipment to 5000 years/ton, and Hubei Zhongtian Jingmen Chemical Co., Ltd. plans to build 5,000 tons. Annual production facilities, Beijing Dongfang Chemical Group plans to build a 20,000-ton/year production plant, Jilin Longtan Economic Development Zone plans to build a new 10,000-ton/year production plant, and Northwest Yongxin Chemical Co., Ltd. plans to build a new 5,000-ton/year production facility. Hunan Hengyang Sanhua Industrial Co., Ltd. plans to build 2,000 tons/year of production equipment. However, due to capital, technology, raw materials and other reasons, the above projects are unlikely to be put into operation before 2006. Therefore, by 2006 China's TMP production still could not meet the market demand, and the products were still mainly dependent on imports.
In recent years, China’s TMP imports have been rising year by year. In 1995, the import volume was 2,957 tons, and in 2000 it reached 15,200 tons. The average annual growth rate of imports was about 38.7%. In 2004, the import volume was 19,000 tons.
China's TMP is mainly used for the synthesis of high-grade alkyd resins and polyurethane coatings, and also for the production of plasticizers. In 2004, the consumption of trimethylolpropane in China was approximately 21,000 tons. The consumption of high-grade alkyd resin and polyurethane coatings accounted for approximately 76.2% of the total TMP consumption. The plasticizer accounted for approximately 21.4%. About 2.4% of other aspects.
The alkyd resin produced by using TMP instead of glycerol, neopentyl glycol, pentaerythritol and other polyols has better hydrolysis resistance, oxidation resistance, alkali resistance and thermal stability, and also has bright color, strong color retention, and dryness. With such advantages as rapidity, it is particularly suitable for the production of road marking paints and varnish, as well as for the production of finishes for automobiles, refrigerators, washing machines, bicycles, aviation and navigation equipment. The alkyd resin synthesized from trimethylolpropane has good compatibility with amino resin and can be used as raw material for polyurethane coatings, and also can be used as high-grade paint for urethane self-drying paints and drying paints.
In recent years, China's paint manufacturing companies have continuously developed various high-grade paints, and introduced foreign capital and foreign advanced technology to produce a variety of paints and intermediates, so that the trimethylol propane industry has been developing rapidly. In 2004, China’s paint output was approximately 3.6 million tons, and China’s TMP consumption in the coatings sector was approximately 16,000 tons. Among them, the consumption of polyurethane paint is about 0.4 million tons, and the consumption of alkyd resin paint is about 12,000 tons. China's auto industry is entering a phase of rapid development, and it is expected that the demand for high-grade coatings for automobiles will increase at an average annual rate of 15%, and will become the most promising area for TMP. With the development of the household appliance industry and shipping and transportation industries, the demand for high-grade coatings has become tighter. The annual demand has reached 13% to 14%. Therefore, it is expected that the total demand for trimethylol propane in the synthesis of high-grade alkyd and polyurethane coatings in China will reach approximately 19,000 tons in 2006.
In the production of plasticizers, the demand for polyvinyl chloride in China was about 7 million tons in 2004, and the demand for plasticizer was about 1.8 million tons; the synthetic fiber, cellulose acetate, leather chemicals and paints were plasticized. The total demand for the agent is approximately 1.9 million tons. In total, approximately 4,500 tons of trimethylolpropane was consumed. It is expected that by 2006 the total demand for trimethylolpropane in the plasticizer industry will reach approximately 6,000 tons.
It is expected that by the year 2006, the consumption of trimethylolpropane will be about 1,000 tons in other aspects.
The industrial production of trimethylolpropane in China began in the 1970s. Although it has a history of more than 30 years, the current operating rate of the plant is very low, and most of them are in the state of production suspension or semi-discontinuation. The main reasons are the following:
One is the shortage of raw materials. The raw material for the production of trimethylolpropane is n-butyraldehyde, which is an intermediate for the production of butanol and octanol. At present, only a few companies, such as the Jilin Chemical Company's calcium carbide plant and Qilu Petrochemical Company, produce in China, and the amount of commercial products is very small. Addition of n-butyraldehyde is flammable, transportation is difficult, and it also directly affects the production of trimethylolpropane.
The second is the backward production process. At present, China mainly adopts cross-carnitar law to carry out the production of trimethylolpropane. This method has the disadvantages of large raw material consumption, low product yield, more by-product sodium formate, and poor desalination process, resulting in higher production costs.
Third, product quality can not meet user needs. The hydroxyl value of foreign trimethylolpropane products is generally 37.5%, and the product will not be discolored for a long time. However, the hydroxyl value of the domestically produced products is only 36.5%. Applications in some areas are limited.
The author believes that to solve the problems of small scale, poor quality, limited source of raw materials, high consumption of products, and backward technology of trimethylolpropane in China, we should start from the following four aspects: To increase the catalytic hydrogenation production process Develop, actively improve production processes, reduce production costs, improve product quality; new projects should adopt advanced aldehyde hydrogenation reduction production process; increase the production capacity of n-butyraldehyde to solve the supply of trimethylolpropane production raw materials Problems; The scale of production of new or expanded projects should be more than 10,000 tons.