Regular catalytic packing in catalytic distillation column and preparation method of regular catalytic packing

Abstract

The invention relates to a regular catalytic packing in a catalytic distillation column and a preparation method of the regular catalytic packing. The regular catalytic packing is prepared from a catalytic packing unit, wherein the catalytic packing unit consists a component I and a component II; the component II is a catalyst cloth bag which is sewed by spun silk cloth, nylon cloth or dacron cloth, the component I and the component II are alternately slantingly arranged in reverse directions respectively and are bound into a cylinder shape to form an efficient catalytic distillation packing unit. According to the regular catalytic packing and the preparation method disclosed by the invention, the catalyst cloth bag and a corrugated packing are slantingly arranged in reverse directions, so that the residence time of a reactant in the catalyst cloth bag can be prolonged, reaction is facilitated, the utilization ratio of the catalyst is increased, and the use amount of the catalyst is reduced; the reaction residence time of the reactant in the catalytic packing can be changed by regulating the inclination angle of the catalyst cloth bag; while, as the component I and the component II are alternately arranged, the vapor-liquid mass transfer process can be enhanced, and thus vapor and liquid alternately flow between a catalyst and a corrugated net repeatedly, and coupling action of separation and reaction is promoted.

Description

technical field [0001] The invention belongs to the technical field of catalytic rectification, and in particular relates to a structured catalytic packing in a catalytic rectification tower and a preparation method thereof, and also relates to the optimization and strengthening of mass transfer and separation processes. Background technique [0002] The catalytic distillation column is a chemical equipment that couples reaction and separation, so the packing in the reaction section of the column must have both catalytic reaction function and vapor-liquid two-phase mass transfer function. After the reactants are catalyzed by the catalyst in the reaction section, the generated products are separated from the reaction system in time, breaking the limitation of the reaction balance, pushing the reaction forward, and significantly improving the conversion rate of the reaction. The structure of the packing in the reaction section of the catalytic rectification column plays a cruc...

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Problems solved by technology

However, there are large gaps between the coiled layers in this method, and it is difficult to avoid channeling and short circuit phenomena during the vapor-liquid two-phase flow, resulting in low catalyst utilization.

[0004] Both Chinese patents CN101024259A and CN102824890A propose a method in which catalyst bundles are made into a flat plate and placed vertically and alternately with structured packing, but in this method, the catalyst bundles are flat and have a small contact area, which is not conducive to the contact between the catalyst and the reactants. transfer, catalyst utilization is low

Because the mass transfer driving force of radial diffusion is small, the rate of outward diffusion of reactants generated in the package is also relatively slow, so the catalyst utilization efficiency of the entire catalyst package is low

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