Introduction and market situation of Maleic anhydride July 31,2020
Introduction of Maleic Anhydride
Maleic anhydride (MA) for short, is a commonly used important organic chemical raw material. Its consumption is second large most after phthalic anhydride and acetic anhydride. It is mainly used to produce unsaturated polyester resins and alkyd resins, 1,4-butanediol (BDO), γ-butyrolactone (GBL), and tetrahydrofuran (THF), maleic acid, fumaric acid and tetrahydro anhydride, etc. In addition, MA also used in pesticides, medicines, coatings, inks, lubricant additives, paper chemicals, textile finishing agents, Food additives, surfactants and other industries.
Maleic anhydride’s production technology routes are mainly divided into four types: benzene oxidation method, carbon four olefin method, phthalic anhydride by-product method, and n-butane oxidation method. At present, the benzene method and n-butane method are mostly used in the market.
According to statistics, domestic maleic anhydride has an annual production capacity of 1.852 million tons. Among them, benzene process MA is about 742,000 tons, and n-butane process MA is about 670,000 tons. But the long-term idle production capacity is about 440,000 tons, of which 380,000 tons of benzene process and 60,000 tons of n-butane process. The average operating rate in 2017 was about 40%, and the output was about 740,000 tons.
The main application field of maleic anhydride is unsaturated resin UPR, which accounts for more than 50%, followed by organic acids, coatings and other fields. With the increasingly stringent domestic environmental protection requirements and the further increase in the concentration of the resin industry, the output of unsaturated resins has increased significantly in 2017. In the future, the application structure of maleic anhydride will still be dominated by UPR.
At present, the domestic production capacity of maleic anhydride is severely surplus, and a large number of benzene-based maleic anhydride plants are idle and will be eliminated in the future. The n-butane process maleic anhydride will gradually become the main supply force by virtue of its advantages in cost and environmental protection. Under the general trend of domestic environmental protection, the downstream of maleic anhydride will also face adjustments and reforms, and demand will not increase significantly in a short period of time. Maleic anhydride enterprises should avoid duplication of construction, start blindly, rationally optimize the industrial layout, and enhance the value of the maleic anhydride industry chain.
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