顺酐的主要方法有苯氧化法、丁烯氧化法和正丁烷氧化法，但仍以苯氧化法为主。1.苯氧化法苯在V-Mo-P系催化剂作用下，在固定床中发生氧化反应，生成顺丁烯二酸酐，反应温度为365℃（反应床层也可用沸腾床，但消耗高）。然后用水吸收生成顺丁烯二酸，再经共沸脱水和精馏，刮片得到成品。2.丁烷（或丁烯）氧化法丁烷（或丁烯）在V-Mo催化剂作用下，经空气或氧气氧化生成顺酐，反应温度350-400℃。然后再经水吸收，脱水和精制得到成品。

The main production methods of maleic anhydride include benzene oxidation, butene oxidation, and n-butane oxidation, but benzene oxidation is still the main method. 1. Benzene oxidation method: Benzene undergoes oxidation reaction in a fixed bed under the action of V-Mo-P catalyst, generating maleic anhydride at a reaction temperature of 365 ℃ (boiling bed can also be used for the reaction bed layer, but the consumption is high). Then, it is absorbed with water to generate maleic acid, which is then subjected to azeotropic dehydration and distillation, and scraped to obtain the finished product. 2. Butane (or butene) oxidation method: Butane (or butene) is oxidized to maleic anhydride by air or oxygen under the action of V-Mo catalyst, at a reaction temperature of 350-400 ℃. Then, it is absorbed by water, dehydrated, and refined to obtain the finished product.

顺酐的合成方法主要有苯氧化法、丁烯氧化法、丁烷氧化法等，目前上多数采用苯氧化法，即以苯为原料，经催化氧化得到顺酐。

The synthesis methods of maleic anhydride mainly include benzene oxidation, butene oxidation, butane oxidation, etc. Currently, most production uses benzene oxidation method, which uses benzene as the raw material and catalyzes oxidation to obtain maleic anhydride.

采用固定床或沸腾床反应器，在V-Mo-P系催化剂作用下，用空气将苯氧化成顺丁烯二酸酐，反应温度为365℃。然后用水吸收生成顺丁烯二酸水溶液，再用二甲苯进行共沸蒸馏脱水得顺酐，减压精馏得成品。

Using a fixed bed or fluidized bed reactor, benzene is oxidized to maleic anhydride with air under the action of V-Mo-P catalyst at a reaction temperature of 365 ℃. Then, it is absorbed with water to generate an aqueous solution of maleic acid, which is then subjected to azeotropic distillation and dehydration with xylene to obtain maleic anhydride. Finally, the finished product is obtained by vacuum distillation.

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