Pulp bed reaction technique for producing chlorine gas by chloride hydrogen catalytic oxidation

Abstract

The invention discloses a slurry bed reaction process for producing chlorine by chlorine hydride catalytic oxidation. In a three-phrase slurry bed reactor, the catalyst powder is dispersed and suspended in an inert reaction medium; the mixed gas of chlorine hydride and oxygen is aerated; the chlorine is prepared by oxidation reaction at the temperature of 250-450 DEG C. The adoption of the three-phrase slurry bed reactor is provided with good heat transfer performance, facilitates the uniform temperature distribution in the reactor and controls to react in an isothermal state, thus avoiding the sintering deactivation phenomenon of the catalyst brought by high temperature; meanwhile, the adoption of powder catalyst can eliminate the influence of catalyst internal diffusion so as to improve the utilization rate and reaction capacity of the catalyst; the process has more than 85 percent of maximum yield, thus providing possibility for industrial production.

Description

technical field [0001] The invention belongs to the field of catalytic oxidation of hydrogen chloride, and in particular relates to a method for producing chlorine by catalytic oxidation of hydrogen chloride in a three-phase slurry bed reactor using inert molten salt as a reaction medium. Background technique [0002] Chlorine is an important chemical raw material, widely used in chemical, metallurgy, papermaking, textile, medicine, petrochemical, drinking water disinfection and environmental protection industries and other fields. Because a large amount of by-product hydrogen chloride will be produced in the production process of chlorine products, most enterprises adopt the water absorption method to make by-product hydrogen chloride into low-value-added hydrochloric acid for sale or discharge after neutralization, which not only causes waste of chlorine resources, but also brings Here comes the problem of environmental pollution. As the demand for chlorine continues to g...

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Problems solved by technology

[0006] In order to avoid the "hot spot" problem in the fixed bed reactor, the US patent (US2007274899) uses carbon nanotubes with high thermal conductivity as the carrier to prepare the catalyst to improve the thermal conductivity of the catalyst particles themselves, so that the temperature distribution of the bed becomes uniform, but the carbon The preparation process of nanotube materials is complicated, the production cost is too high, and it is not suitable for industrial application