通过对市场的调查回访我们发现，很多客户对山东顺酐的制备方法还不是了解的很明白，今天小编就将查阅的相关资料与大家分享一下，希望引起大家的重视，让大家对顺酐生产厂家了解。这样大家在购买使用顺酐生产厂家时也能做到心中有数，不怕上当受骗，希望对大家有所启发与帮助。

Through the investigation and return visit to the market, we found that many customers do not understand the preparation method of maleic anhydride in Shandong Province. Today, I will share the relevant information with you, hoping to arouse your attention and let you understand the maleic anhydride manufacturer. In this way, when purchasing and using maleic anhydride manufacturers, we can also know what to do, and we are not afraid of being cheated. We hope that we can get some inspiration and help.

1. 苯氧化制山东顺酐

1. Oxidation of benzene to Shandong maleic anhydride

将苯与空气混合经换热器预热后，进人列管式催化反应器。在压力为0.1-0.2MPa、温度为350-400℃的反应条件下进行氧化反应，所得产物经两台换热器、一台冷却器后，冷固到接近55―65℃。冷固后的反应物进入分离器，分离器底部得粗顺酐，进入粗顺酐罐。分离器顶部流出物进人洗涤塔，用水洗涤，塔顶为多余空气和未反应的苯，苯可用吸附回收。洗涤塔塔底水溶液进人脱水器，分离出水，所得粗顺酐进人粗顺酐罐。粗顺酐进一步进人蒸馏塔进行蒸馏精制，得顺酐。所得山东顺酐可进行异构化得富马酸和苹果酸。

The mixture of benzene and air is preheated by heat exchanger and then enters into the tubular catalytic reactor. The oxidation reaction was carried out under the pressure of 0.1-0.2mpa and the temperature of 350-400 ℃. After two heat exchangers and one cooler, the product was cooled to 55-65 ℃. The cold solid reactant enters the separator, and the coarse maleic anhydride is obtained at the bottom of the separator and enters the coarse maleic anhydride tank. The effluent from the top of the separator enters into the washing tower and is washed with water. The tower top contains excess air and unreacted benzene, and benzene can be recovered by adsorption. The bottom water solution of the washing tower enters into the human dehydrator, the separated water, and the obtained crude maleic anhydride enters into the human crude maleic anhydride tank. The crude maleic anhydride is further put into the distillation tower for distillation and refining to obtain maleic anhydride. The maleic anhydride can be isomerized to fumaric acid and malic acid.

2.C4馏分部分氧化制顺酐

2. Partial oxidation of C4 fraction to maleic anhydride

工业上用不经分离的C4馏分或分离异丁烯和丁二烯后的C4馏分为原料生产顺酐。C4馏分与空气混合后进人流化床氧化反应器，在300―500℃温度下，与反应器中的催化剂接触生产顺酐。氧化反应器顶部流出的反应生成物进人吸收塔，用水作为吸收剂，塔顶气体经废水

In industry, maleic anhydride is produced from C4 fraction without separation or C4 fraction after separation of isobutene and butadiene. C4 fraction is mixed with air and then enters the fluidized bed oxidation reactor. At 300-500 ℃, it contacts with the catalyst in the reactor to produce maleic anhydride. The reaction products from the top of the oxidation reactor enter into the absorption tower, and water is used as the absorbent. The gas at the top of the tower passes through the waste water