Hydrogenation of nitrobenzene reduction method in a fluidized bed reactor, the electrolysis brine to produce hydrogen, isolated by NaOH solution, cyclones, activated carbon adsorption after purification, was heated to 350-400 ℃, into the evaporator, while the metering nitrobenzene Join evaporator factory direct hydrogen mixed with aniline, superheated to 180-223 ℃, the mixed gas from the bottom of the fluidized bed into the aniline Beijing, silicone and inner copper catalyst bed. Crude aniline and steam generated by the top of the bed discharge aniline, the crude aniline condenser cooling, separation and distillation to be finished. 3. The cost of the choice of dye dye dye in the choice, not only from the shade and offer the sake of aniline fastness, taking into account the cost of the use of dyes and additives, and other sources. Dyes such as higher prices, should be considered equally with other dyes can be dyed to substitution effects, in order to reduce production costs. 4. When selecting dyes mixed colors mixed colors when necessary, use dye should pay attention to their constituents, solubility, color fastness, dye uptake properties. Since the dyeing properties of various types of dyes are different, in dyeing often due to different temperatures, the solubility, dye uptake or the like and the staining effect. Thus were mixed colors, you must select the similar performance of dye, and more similar as possible, which can help control, staining quality and stable process conditions. 5 Select the dye due to different dyeing machinery, the nature and requirements of the dye is not the same mechanical properties according to staining. If for jigger, should use higher direct dyes; for padding, you should choose a less direct dyes, otherwise the former will produce light after dark, uneven color, which do not meet the requirements. Aniline Aniline Nanjing Beijing _ _ Xiang dry chemical (view) from Jinan Cheung dry chemical Limited. Jinan Cheung Dry Chemical Co. (www.xiangqianhuagong.com) (www.dilunyierchun.com) is a professional, "glycol" company. Since its inception, we adhere to the "good faith, sound management" approach, the courage to participate in healthy competition in the market, so that the "chemical universe" brand has a good reputation. We adhere to the "service first, customers first" principle, so that the dry chemical Xiang won the trust of customers in alcohol in public, establish a good corporate image. Special Note: This information is for reference pictures and information, please contact us to obtain the most accurate information, thank you! You can also access (www.dilunyierchun.com/supply_details_48095175.html), for more information about the company.