Industrial production methods aniline mainly iron reduction of nitrobenzene, aniline-based chlorination method, catalytic hydrogenation of nitrobenzene reduction and phenol ammonia solution. Currently nitrobenzene hydrogenation method as the main method of production. Nitrobenzene iron reduction method nitrobenzene, ferrous chloride solution and grated iron added to the batch reactor aniline quotes, reaction at 100 ℃ reflux condition. Followed by neutralization with lime intermittent aniline, to the separator, into an aqueous phase, the organic phase and the iron oxide slurry. The organic phase was siphoned out and aniline obtained by stripping or distillation step. Heating the material left in the separator, to recover the residual aniline. Then transferred to another container, diluted with water and a mild stir factory direct aniline, iron oxide powder is separated from unreacted iron as overflow, the unreacted iron precipitation in the bottom of the container. Iron oxide powder further washed, filtered and dried to give iron oxide pigments cogeneration. Total yield of aniline with nitrobenzene is about 95%. [4] (7) Nippon Kayaku has developed and screened Kayaeelon C dyes: CI Direct Yellow 161 (Yellow C-3RL), CI Direct Red 83 (Rubine C-BL), CI Direct Blue 288 (Blue C- BK), CI Direct Green 59 (Caeen C-CK), CI Direct Black 117 (Crey C-RL) and the like. Modern Thai Modern Direct Group launched series of advanced direct dyes shelf aniline, Dystar Sirius Plus has developed a series of direct dyes, Ciba launched Cibafix ECO direct dyes, BASF has introduced Diazol series of direct dyes, Yorkshire Benganil series launched direct dyes. These dyes have similar functions, such as bright color, high light fastness and is free of heavy metals in the environment-friendly dyes, with excellent high temperature stability for a bath one polyester blended fabric dyeing. Xiang dry chemical (Figure), aniline uses aniline Shenzhen Cheung stem from Jinan Chemical Limited. Jinan Cheung Dry Chemical Co. (www.xiangqianhuagong.com) (www.dilunyierchun.com) adhere to the "people-oriented" business philosophy, has a professional staff, and strive to provide the best products and services to contribute to the community, and welcome to new and old customers to visit us and sincere cooperation for a better future. Xiang dry chemical - your trusted friend, Company Address: Industrial Road chemical market, Contact: Mr. You can also access (www.dilunyierchun.com/supply_details_48381825.html), for more information about the company.