Pre purification and concentration of raw gas: In the presence of a catalyst, the raw gas containing a large amount of impurities is pre purified to reduce the impurity concentration to below 10ppm or lower, and then put into subsequent production processes.

催化劑制備：將一定量的金屬氧化物作為催化劑加入到反應(yīng)器中進(jìn)行還原焙燒以除去其中的氧原子并生成相應(yīng)的絡(luò)合產(chǎn)物如鐵氰化物等中間化合物以及氧化劑如空氣等進(jìn)行反應(yīng)的混合物稱為助燃劑和還原劑混合物。

Catalyst preparation: A certain amount of metal oxide is added as a catalyst to the reactor for reduction roasting to remove oxygen atoms and generate corresponding complex products such as intermediate compounds such as ferrocyanide, and a mixture of oxidants such as air for reaction is called a mixture of combustion aid and reducing agent.

空氣的制備：以空氣代替氫氣作助燃劑的化學(xué)反應(yīng)稱為空氣的氧化作用。

The preparation of air: The chemical reaction of using air instead of hydrogen as a combustion aid is called the oxidation of air.

苯氧化法：苯氧化法是順酐的傳統(tǒng)工藝技術(shù)，主要工藝流程是將苯蒸汽和空氣（或氧氣）按照一定的比例混合，在釩鉬氧化物系催化劑下作用，在固定床反應(yīng)器中氧化生成順酐混合氣，經(jīng)氣體冷卻器初步降溫后，在部分冷凝器中捕集部分液體粗酐，未被冷凝的氣態(tài)順酐用水或者溶劑吸收，制得精酐，液態(tài)順酐在包裝工序冷卻壓制為成品。

Benzene oxidation method: Benzene oxidation method is a traditional process technology for producing maleic anhydride. The main process involves mixing benzene vapor and air (or oxygen) in a certain proportion, acting on a vanadium molybdenum oxide catalyst, and oxidizing in a fixed bed reactor to generate a mixed gas of maleic anhydride. After being initially cooled by a gas cooler, some liquid crude anhydride is captured in some condensers, and the uncondensed gaseous maleic anhydride is absorbed by water or solvent to produce phthalic anhydride, Liquid maleic anhydride is cooled and pressed into finished products during the packaging process.

將一定量的金屬氧化物作為催化劑加入到反應(yīng)器中進(jìn)行還原焙燒以除去其中的氧原子并生成相應(yīng)的絡(luò)合產(chǎn)物如鐵氰化物等中間化合物以及氧化劑如空氣等進(jìn)行反應(yīng)的混合物稱為助燃劑和還原劑混合物。

Adding a certain amount of metal oxide as a catalyst to the reactor for reduction roasting to remove oxygen atoms and generate corresponding complex products such as intermediate compounds such as ferrocyanide and oxidants such as air for reaction is called a mixture of combustion aid and reducing agent.