Editing a production methods, recycling xylene from coking products. Xylene, benzene co-product is produced, depending on the boiling points of the components of crude benzene, extracted by distillation fraction boiling range of 135 ~ 145 ℃ obtain xylene. 2, light gasoline platinum reforming process using atmospheric distillation (initial boiling point of about 138 ℃), interception fractions greater than 65 ℃, the first by molybdenum catalysts, catalytic hydrogenation emerge harmful impurities, and then the platinum catalyst reforming, glycol solvent extraction with diethyl ether, and then the distillation tower xylene ink, obtained as benzene, toluene, xylene and other products. 3, toluene disproportionation method. This method is in the catalyst, so that a toluene methyl transfer to another toluene to produce benzene and xylene. The reaction is DF-166 catalyst (lack of aluminum in the hydrogen form mordenite) xylene prices to reforming toluene (nitration grade) and the reformer recycle hydrogen (85% to 90%) as a raw material of xylene, the reaction temperature of 400 ± 2 ℃ a pressure of about 2MPa like xylene printing conditions, obtained by the reaction of benzene and xylene. 4, light petroleum distillates mixed benzene through hydrotreating, catalytic reforming, separation derived xylene. Or washed coking crude benzene, xylene fractionation derived: capable of connecting the same or two or more homogeneous or heterogeneous article (or material) together with sufficient strength after curing organic or inorganic of, a natural or synthetic substances, collectively referred to as adhesive or bonding agents, adhesives, customarily referred to as the glue. Introduction 1. Classification classification methods can be divided by application heatset, hot melt, room temperature curing type, pressure-sensitive, such as .2 subjects were divided according to the application structure, non-configuration or special glue. Belong Structural Adhesives are: epoxy, urethane, silicone-based, polyimide-based thermosetting adhesives; polyacrylates, polymethacrylates, methanol, etc. The thermoplastic adhesives; and such as phenol - modified epoxy-type, etc. multi-component adhesive properties. 3. Press the curing can be divided into the volatile solvent, emulsion, and hot melt four .4 reaction. Synthetic chemists often like to stick to the adhesive according to the chemical composition of materials classified .5 divided by main ingredient organic class, inorganic. 6. Press the appearance of classification, can be divided into liquid, paste and solid categories. 7. Press the component category: single-component, two-component reactive. Xylene prices, xylene, Wei Wei Connaught Chemical provided by Qingdao Sino Chemical Co. Qingdao Wei Connaught Chemical Co. (www.qdweinuo.com) strong, credible, in Qingdao, Shandong and other chemical products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Wei Connaught Chemical and you hand into the brilliant, for a better future!