Xylene is a colorless and transparent liquid with special aromatic smell. Xylene itself is irritant and flammable. It can be mixed with ethanol, chloroform and ether, insoluble in water. It's highly toxic and dangerous.

谈谈二甲苯的生产方法：1。根据粗苯成分的沸点，通过精馏提取沸程馏分，得到二甲苯。2.铂重整法用常压蒸馏得到的轻汽油切断65以上的馏分，用含钼催化剂催化加氢除去有害杂质，用铂催化剂重整，用二甘醇醚溶剂提取，然后每个塔精馏，得到苯、甲苯、二甲苯的3.甲苯歧化法。该方法通过催化剂将甲苯的一个甲基转移到另一个166催化剂(铝缺氢沸石)，将改性甲苯(硝化段)和改性循环氢(85%~90%)设为原料的生产苯和二甲苯4.将石油轻馏分加氢精制、催化改性和分离后，与苯混合，可得到二甲苯。或者洗涤和分馏使粗苯焦化。

First of all, the production methods of xylene: 1. According to the boiling point of crude benzene, xylene was obtained by distillation. 2. Platinum reforming method cut off the fraction above 65 with light gasoline obtained by atmospheric distillation, remove harmful impurities by catalytic hydrogenation with molybdenum catalyst, reform with platinum catalyst, extract with diethylene glycol ether solvent, and then distill in each column to obtain benzene, toluene and xylene. 3. Toluene disproportionation method. In this method, one methyl group of toluene is transferred to another 166 catalyst (aluminum hydrogen deficient zeolite) by catalyst, and modified toluene (nitration section) and modified recycle hydrogen (85% ~ 90%) are set as raw materials to produce benzene and xylene. 4. Xylene can be obtained by hydrofining, catalytic modification and separation of petroleum light fraction and mixing with benzene. Or washing and fractionation make the crude benzene coking.

制造二甲苯方法也非常简单。相似的工业相邻的二甲苯。将馏出物澄清后，收集中间馏出物，为纯制品。

The method of making xylene is also very simple. Similar industrial adjacency to xylene. After the distillate is clarified, the intermediate distillate is collected for pure products.

用于医用组织的切片、透明度、脱蜡。也是汽车燃料中辛烷值高的成分，可以作为汽车清洗剂使用。总的来说，在工业生产领域中，二甲苯是非常重要的有机化工原料，存在很多领域。

Used for slicing, transparency and dewaxing of medical tissue. It is also a component with high octane number in automobile fuel and can be used as automobile cleaning agent. In general, xylene is a very important organic chemical raw material in the field of industrial production.

另外，二甲苯不仅可以作为染料，也可以作为稀释剂使用。关于其保存方法，建议保存在远离火种和热源的阴暗处。在合成和制造领域有显着的效果。

In addition, xylene can be used not only as dye, but also as diluent. As for its preservation method, it is recommended to keep it in a dark place away from fire and heat source. It has remarkable effect in the field of synthesis and manufacturing.

由二甲苯氧化得到的苯甲酸是重要的食品防腐剂(主要使用其钠盐)，也作为有机合成的中间体使用。二甲苯被硝化时，可以制造大量的中间体，可以得到聚氨酯制品、染料和有机颜料、橡胶添加剂、药物等多种制品。

Benzoic acid obtained by oxidation of xylene is an important food preservative (its sodium salt is mainly used), and it is also used as an intermediate in organic synthesis. When xylene is nitrated, a large number of intermediates can be produced, such as polyurethane products, dyes and organic pigments, rubber additives, drugs and other products.