Method for producing pyrrole by means of furan amination

Abstract

The invention provides a method for producing pyrrole by means of furan amination. The method comprises a catalytic reaction step and a catalyst regeneration step, wherein the catalytic reaction stepcomprises the process of introducing heated raw material mixture gas into a fixed bed containing a catalyst layer to prepare the pyrrole, wherein the raw material mixture gas contains ammonia gas, water vapor and furan, and the catalyst is prepared by loading iron onto an alumina carrier; the catalyst regeneration step comprises the processes of stopping the introduction of the raw material mixture gas into the fixed bed, and causing regeneration mixture gas to regenerate the catalyst in a fixed bed way, wherein the catalyst bed layer temperature is higher than or equal to 350 DEG C during theregeneration, and the volume fraction of oxygen in the regeneration mixture gas is 5-15%. The invention provides the efficient, low-price and environment-friendly production method of the pyrrole. Ina preparation process of the catalyst, the catalyst is formed by loading the iron onto the alumina carrier, so that the use of sulfuric acid and ammonia water is avoided, and the method is environmentally-friendly.

Description

technical field [0001] The invention relates to the field of organic chemical industry, in particular to a production method for preparing pyrrole by amination of furan. Background technique [0002] Pyrrole is a nitrogen-containing heteroatom compound, which can be used as an intermediate in many organic synthesis reactions, especially in many drug synthesis reactions, and is an important compound in the field of fine chemicals. In recent years, it has been widely used in polymer materials. For example, pyrrole can be polymerized into polypyrrole with good conductivity. The latter can be used as electrode material for high-energy rechargeable batteries, microwave absorbing materials and solid electrolytes. Therefore, the industrial demand for pyrrole is also increasing. [0003] There are many methods for synthesizing pyrrole, mainly including (1) galactaric acid method; (2) pyrrolidine dehydrogenation method; (3) furan amination method; (4) acetylene method; (5) BASF meth...

AI Technical Summary

Problems solved by technology

However, the solid superacid needs to be impregnated with sulfuric acid and neutralized with ammonia water during the catalyst preparation process. When the catalyst is prepared for industrial application, environmental protection pressure is high.

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