阴极碱性液溶解4B酸粗品，活性炭吸附除去从粗品中溶出的对甲苯胺等杂质，中间区的酸性液使4B酸精品析出。

The p-methylaniline and other impurity in the crude product are adsorbed by active carbon and the purified 4B acid is precipitated out by acidic solution from middle compartment.

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回收粗苯是焦化厂生产的中间产品，是精制车间生产纯苯、甲苯、二甲苯等产品的原料。

Recovery of crude benzene is the coking plant production of intermediate products, refined workshop production of benzene, toluene, xylene and other products of raw materials.

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如果需要，也能利用此工艺从粗裂解汽油中抽提出混合二甲苯，将其价值从燃料级提升到化工原料级。

If necessary, it can be distilled out MX from the process, upgrading fuel value to chemical value.

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