Hydrogen chloride oxidation reaction catalyst for preparing chlorine, and preparation method therefor

A catalyst, hydrogen chloride technology, applied in the direction of chloride preparation, metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, etc., can solve the problems of reduced catalytic performance and low thermal stability, and achieve strengthening Thermal stability, ensuring thermal stability, and the effect of maintaining catalytic performance for a long time

Pending Publication Date: 2021-07-23
HANWHA SOLUTIONS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The existing ruthenium-based catalysts have the characteristics of producing chlorine gas at a relatively low reaction temperature with a small amount of catalyst, and there is a phenomenon that the catalytic performance decreases within several months due to low thermal stability when operating at high temperature

Method used

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  • Hydrogen chloride oxidation reaction catalyst for preparing chlorine, and preparation method therefor
  • Hydrogen chloride oxidation reaction catalyst for preparing chlorine, and preparation method therefor
  • Hydrogen chloride oxidation reaction catalyst for preparing chlorine, and preparation method therefor

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preparation example Construction

[0053] According to an embodiment of the present invention, a method for preparing a catalyst for hydrogen chloride oxidation reaction is provided, comprising the following steps: Step (a), the first loading step, preparing more than one precursor selected from heterogeneous substances and dissolving them in a solvent The resulting solution is loaded onto one or more carriers selected from alumina, titania and zirconia; step (b), after the first loading step, is dried and fired, and cooled at room temperature , to obtain a solid; step (c), the second loading step, prepare a solution in which the ruthenium precursor is dissolved in a solvent, and further carry out loading; step (d), after the second loading step, drop into the solids; and step (e), performing a second drying and firing.

[0054] At this time, the foreign substances include more than one selected from cerium precursors, aluminum precursors, and silicon dioxide precursors, and relative to the solution with a tota...

Embodiment 1

[0073] A solution prepared by dissolving 0.5 g of cerium nitrate hydrate in 5.0 g of DIW was impregnated with 10.0 g of titanium dioxide powder, and then dried in air at 100° C. for 4 hours. The dried solid was subjected to calcination at 350° C. for 3 hours in an electric furnace with air flow, after which it was slowly cooled to room temperature. In the solution prepared by dissolving 1.08 g of trinitronitrosyl ruthenium dissolved in nitric acid solution in 320.0 g of DIW, add the solid matter prepared in the above-mentioned way, and stir at room temperature for 5 hours, after that, use rotation Concentrator for drying. In an electric furnace with air flow, at 350 ° C, the dried solid was calcined for 3 hours, and then slowly cooled to room temperature, finally, the content of ruthenium oxide was 2.0 parts by weight. The content of cerium is 2.0 parts by weight of RuO 2 -CeO 2 / TiO 2 catalyst.

Embodiment 2

[0075] Using 0.13 g of cerium nitrate hydrate, the catalyst was prepared in the same manner as in Example 1. Finally, the RuO with a content of ruthenium oxide of 2.0 parts by weight and a content of cerium oxide of 0.5 parts by weight was obtained. 2 -CeO 2 / TiO 2 catalyst.

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Abstract

The present invention relates to a catalyst for obtaining chlorine (Cl2) through the oxidation reaction of hydrogen chloride (HCl) and, more specifically, to: an oxidation reaction catalyst for preparing Cl2 from HCl by the addition of a second hetero-material to a RuO2-supported catalyst using TiO2 as a support; and a preparation method therefor. According to an embodiment of the present invention, provided is a hydrogen chloride oxidation reaction catalyst to be used in a method for preparing chlorine by oxidizing hydrogen chloride, the catalyst comprising a support and a hetero-material in an active ingredient. The catalyst according to the present invention has both increased catalytic activity at a low temperature and enhanced thermal stability, and thus a catalyst having improved durability such as thermal stability at a high temperature is provided. Therefore, since thermal stability is ensured, the performance of the catalyst is maintained for a long time even at a high temperature.

Description

technical field [0001] The present invention relates to a method for producing chlorine (Cl) through the oxidation reaction of hydrogen chloride (HCl). 2 ) catalysts, specifically related to TiO 2 The RuO2-supported catalyst as a carrier adds heterogeneous substances to produce chlorine (Cl) from hydrogen chloride (HCl) 2 ) oxidation reaction catalyst and preparation method thereof. Background technique [0002] The catalytic oxidation of hydrogen chloride, developed by Deacon in 1868, utilizes oxygen to oxidize hydrogen chloride to form chlorine gas in an exothermic equilibrium reaction. Hydrogen chloride is formed in large quantities as a co-product in phosgenation reactions such as the preparation of isocyanates. The hydrogen chloride formed in the preparation of isocyanates is mainly used in the chlorine oxidation reaction of ethylene for the preparation of 1,2-dichloroethane, in which 1,2-dichloroethane is treated to form vinyl chloride and finally polychloride Viny...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J37/02B01J37/08C01B7/04
CPCB01J23/63C01B7/04B01J2523/00B01J37/0201B01J37/088B01J23/462Y02P20/20B01J21/063B01J35/008B01J37/0203B01J37/0009B01J35/023B01J35/026B01J35/1019B01J35/1014B01J2523/3712B01J2523/47B01J2523/821B01J37/0236B01J37/08B01J6/001B01J37/0213
Inventor 全廷桓赵永镇金元用禹恩智李佳蓝
Owner HANWHA SOLUTIONS CORP
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