Maleic anhydride main uses and domestic status

Maleic anhydride is mainly used in raw material unsaturated polyester resin (UPR) of FRP industry; 1,4-butanediol (BDO), tetrahydrofuran (THF) and γ-butyrolactone (GBL) in hydrogenated products; Used in coatings, lubricant additives, pesticides, tartaric acid, succinic acid and anhydride, tetrahydrophthalic anhydride, modified rosin and so on. Unsaturated Polyester Resin (UPR): It is one of the main varieties of thermosetting resins. Because of its excellent mechanical properties, electrical properties and chemical resistance, and its simple processing technology, it is widely used. At present, China can produce more than 400 UPR grades. The main varieties include o-benzene, m-benzene, p-benzene, and bisphenol A. According to the purpose and function, they include general resin, chemical-resistant resin, flame-retardant resin, Casting resins, flexible resins, artificial marble, BMC and DMC resins, decorative resins and specialty resins. According to reports, in China's UPR market, the proportion of reinforced (FRP) resins accounts for only 40%, while that for non-reinforced resins is as high as 60%, and in non-reinforced resins, the processing resins account for 34% and button resins account for 24%, artificial marble accounts for 19%.

In 2003, the production of alkyd resin coatings and amino resin coatings was estimated at 750,000 tons and consumed about 11,400 tons of maleic anhydride. It is expected that during the “11th Five-Year Plan” period, alkyd resin coatings and amino resin coatings will still be the main varieties of the coating industry, and water-based coatings, powder coatings, high solids coatings and other energy-saving and low-pollution coatings will develop at a faster rate. But the share will not change much. It is estimated that by 2009, the paint market demand will reach about 3 million tons, of which the alkyd resin coating and amino resin coating will account for about 875,000 tons, and the corresponding maleic anhydride consumption will be about 15,000 tons. According to reports, tartaric acid: tartaric acid is mainly used as a food sour agent, and its salts are used for mirror silver plating and metal processing. In the textile industry, tartaric acid can also be used in the tanning and telecommunications equipment industries.

In 2003, the production capacity of L-type and dl-type tartaric acid in China was estimated to be approximately 11,000 tons, with a production of approximately 8,500 tons and consumption of approximately 7,900 tons of maleic anhydride. As L-tartaric acid producers in the United States and Japan have shifted their investment to China in recent years, the domestic L-type tartaric acid production capacity has grown rapidly. At present, the annual production capacity of L-type tartaric acid in China has reached more than 10,000 tons, and the annual production capacity of dl-type tartaric acid products has also reached approximately 20,000 tons. It is estimated that by 2009, the production capacity of L-type and dl-type tartaric acid products will reach about 40,000 tons and will consume about 38,000 tons of maleic anhydride.

Lubricant Additives: PetroChina Lanzhou Petrochemical Company and Jinzhou Petrochemical Company are the two largest lubricant additive manufacturers in the country, with production capacity accounting for approximately 70% of the country's total, and Dushanzi Refinery, Yumen Refinery, and Wuxi, Shanghai, Dalian, Nanjing, Small factories in Yi County and Lanzhou also have a certain amount of production. At present, China's lubricating oil additive products are mainly ashless dispersants and metal detergents, accounting for 70% of the total consumption of lubricating oil additives, of which only the production of ashless dispersants requires the consumption of maleic anhydride. In 2003, the output of ashless dispersants in China was about 35,000 tons, and about 2,000 tons of maleic anhydride was consumed. It is expected that by 2009, the demand for China's lubricant additives will reach 158,000 tons, of which the demand for dispersants will be around 75,000 tons, and about 5,000 tons of maleic anhydride will be consumed.
Pesticides: Maleic anhydride In the production of pesticides, they are mainly used as pesticides, including organophosphorus insecticides such as malathion and daclone, and pyrethroid insecticides such as tetramethrin. In 2003, pesticide production in China consumed about 3,000 tons of maleic anhydride, and it is estimated that consumption will be around 5,000 tons in 2009. Succinic acid and anhydride: succinic acid (succinic acid) is mainly used in coatings, dyes, adhesives and medicine. The alkyd resin produced from succinic acid has good flexibility, elasticity, and water resistance; the diphenyl ester of succinic acid is an intermediate in the oil and reacts with the aminoguanidine to form an anthraquinone dye; succinic acid is available in the pharmaceutical industry To produce sulfa drugs, vitamin A, vitamin B, and hemostatic drugs; succinic acid is also widely used in papermaking and textile industries, and can also be used as a raw material for lubricants, photochemicals, and surfactants. In 2003, the output of succinic acid and anhydride in China was about 2,800 tons, and 3,900 tons of maleic anhydride was consumed. It is estimated that the consumption will reach 5,000 tons in 2009.

Tetrahydrophthalic anhydride: tetrahydrophthalic anhydride, as an organic synthesis intermediate, can be used to prepare pesticides such as adriamycin and captan, etc. It can also be made into plasticizers, epoxy resin curing agents, unsaturated polyester resins, and solvent-free paints. Adhesives and so on. In 2003, the production capacity of tetrahydrophthalic anhydride and methyltetrahydrophthalic anhydride in China was approximately 2,500 tons, with a production volume of approximately 2,000 tons and a consumption of approximately 1,500 tons of maleic anhydride. It is expected that consumption will reach 2,500 tons in 2009. According to reports, modified rosin: maleic anhydride is used in the production of rosin modified rosin esters and disperse rosin emulsions. In 2003, the output of China's modified rosin was about 6,000 tons, and about 2,400 tons of maleic anhydride was consumed. It is expected that consumption will reach 5,000 tons in 2009. Chemical auxiliaries: maleic anhydride is used in the chemical auxiliaries for the production of fast penetrant T and water quality stabilizer. In 2003, China's rapid penetration agent T production capacity was about 8,000 tons, production was about 5,000 tons, consumption of maleic anhydride was about 3,000 tons; 2003 China Water quality stabilizer production capacity of about 11,000 tons, production of about 6,000 tons, consumption of maleic anhydride about 1000 tons.