Method for preparing cyclohexane by catalyzing and hydrogenising benzene at room temperature

Abstract

A method for preparing cyclohexane by catalyzing and hydrogenising benzene at room temperature relates to preparing methods of cyclohexane. Activated carbon serves as a carrier, and double metal load type catalyst marked as M1@M2 / C is prepared with a metal M1 serving as the core and a metal M2 serving as the shell, wherein the M1 is one of Ni, Fe, Co and Cu, the M2 is one of Ru, Pt, Au and Rh, and the C is carrier activated carbon; and reaction raw material benzene and the double metal load type catalyst M1@M2 / C are added into a high pressure reactor respectively, the high pressure reactor is heated to 30 DEG C to 100 DEG C, the reaction pressure is in a range for1MPa to4.8MPa, and residual gases are exhausted and are subjected to centrifugal separation to obtain a resultant when the reaction pressure is constant. High cyclohexane selectivity, productivity and time of flight (TOF) value can be obtained, the load of an adopted catalyst is low, the preparation is simple, the cost is low, the stability is good, and the catalyst can be recycled.

Description

technical field [0001] The invention relates to a preparation method of cyclohexane, in particular to a method for preparing cyclohexane by catalytic hydrogenation of benzene at room temperature. Background technique [0002] In 1897, the Frenchman P. Sabatier first studied the hydrogenation of unsaturated organic compounds in the presence of nickel catalysts. After more than 100 years of development, the hydrogenation process has become the most important in the chemical industry and petroleum refining industry. one of the reaction processes. The importance of the hydrogenation reaction is described in detail below mainly by the hydrogenation reaction of benzene. [0003] Cyclohexane is an important organic chemical raw material, which is mainly used for the production of cyclohexanol, cyclohexanone and monomers such as caprolactam, adipoyl, and hexamethylene diamine for the manufacture of nylon~66 and nylon~6. And can dissolve a variety of organic substances, less toxic ...

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Problems solved by technology

However, due to the complex preparation process of the catalyst and the relatively high loading capacity, the cost is high

[0015] In addition, the Chinese patent CN1298760A prepared an amorphous Ni~B or Ni~M~B catalyst, using this catalyst to successfully realize the benzene hydrogenation reaction, but the reaction temperature is above 100 ° C, and the energy consumption is high

Chinese patent CN1457923A invented a platinum-based catalyst for the hydrogenation of benzene to cyclohexane. Not only is the price of platinum expensive, but also the reaction temperature is 170°C and the pressure is 3.1Mpa. The reaction conditions are harsh and the industrial application value is low; Chinese patent CN1037729A Invented a homogeneous catalyst for benzene hydrogenation containing cobalt or nickel, but due to the difficulty in separating the homogeneous catalyst, it is not conducive to industrialization

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