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A highly stable catalyst for hydrogen chloride oxidation to chlorine

A high-stability, oxidation-based technology, used in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chlorine/hydrogen chloride, etc. The effect of sintering deactivation and enhancing stability

Active Publication Date: 2022-03-15
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to provide a highly stable catalyst for hydrogen chloride oxidation to chlorine with good dispersibility and strong sintering resistance in view of the problem of low stability of hydrogen chloride oxidation catalysts in the prior art at high temperature and high space velocity

Method used

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  • A highly stable catalyst for hydrogen chloride oxidation to chlorine
  • A highly stable catalyst for hydrogen chloride oxidation to chlorine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Place a beaker containing 100 mL of deionized water in an ice-water bath, and continue magnetic stirring, and then drop 10 mL of TiCl 4 , a clear and transparent solution was obtained. 1.25 g of 4-hydroxypiperidine and 5.00 g of cetyl ammonium sulfate were added to the resulting solution and stirring was continued for 1 h. The resulting mixture was sealed and kept in a water bath at 50°C for 24 hours, then filtered, washed with water and alcohol three times each, dried at 50°C for 12 hours, and then calcined in an air atmosphere at 450°C for 4 hours to obtain 6.51 g of the prepared TiO 2 , denoted as TiO 2 -1. The target amount was obtained by accumulating multiple times through the same preparation method.

[0031] Add 2.0g RuCl 3 ·3H 2 O was dissolved in 400mL deionized water, and the second component 4.5g Ce(NO 3 ) 3 ·6H 2 O, 1.5g ZrOCl 3 ·8H2 O, add 100g TiO 2 -1, vigorously stirred, impregnated for 24 hours; centrifuge the obtained material, wash it full...

Embodiment 2

[0033] TiO 2 -1 is prepared with embodiment 1. Add 3.2g of anhydrous ruthenium trichloride to 500mL of deionized water, fully dissolve, then add the second component SnCl 4 ·5H 2 O 5.4g, 150g TiO 2 -1 was added and stirred vigorously, impregnated for 12 hours; then the obtained material was centrifuged, washed fully with deionized water, then dried at 80°C, granulated, shaped and dried in air atmosphere, at 350°C After roasting for 6 hours, the catalyst B for producing chlorine by catalytic oxidation of hydrogen chloride is obtained.

Embodiment 3

[0035] Place a beaker containing 200 mL of deionized water in an ice-water bath, and continue magnetic stirring, and then drop 15 mL of TiCl 4 , a clear and transparent solution was obtained. 7.20 g of ammonium lauryl sulfate and 3.54 g of triethylenediamine were added to the resulting solution, and stirring was continued for 1 h. The resulting mixture was sealed and kept in a water bath at 50°C for 18 hours, then filtered, washed with water and alcohol three times each, dried at 50°C for 12 hours, and then calcined in air at 400°C for 4 hours to obtain 9.85 g of the prepared TiO 2 , denoted as TiO 2 -2. The target amount was obtained by accumulating multiple times through the same preparation method.

[0036] Add 1.2g RuCl 3 ·3H 2 O was added to 400mL deionized water, and then the second component SmCl was added 3 ·6H 2 O2.1g, SnCl 4 ·5H 2 O 3.6g, TiO 2 -2 Add to the above solution and stir vigorously, impregnate for 20 hours; then centrifuge the obtained material,...

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Abstract

The invention discloses a highly stable catalyst for producing chlorine by oxidation of hydrogen chloride, which is characterized in that the mass percentage of the catalyst precursor is composed of: component A is 0.1-3%; component B is 0.1-6%; and the balance is TiO 2 ; Wherein component A is Ru metal salt; Component B is one or more metal salts of Ce, Sn, Zr, Sm; TiO 2 It is a high specific surface area rutile phase carrier prepared by liquid phase template method. The invention adopts a high specific surface area rutile phase carrier, greatly improves the dispersion of active components, and delays the sintering deactivation through the confinement effect on the active phase, so as to solve the problem of low stability of the existing hydrogen chloride oxidation catalyst at high temperature and high space velocity .

Description

technical field [0001] The invention belongs to the field of catalysts, in particular to a highly stable catalyst for producing chlorine by oxidation of hydrogen chloride. Background technique [0002] Chlorine and hydrogen chloride are important forms of chlorine, and are also very important chemical products and raw materials. In the chlorine-related industry, the global annual by-product hydrogen chloride and inorganic chloride has reached 42 million tons per year (Catalysis Surveys from Asia, 2010, 14(3-4):168-175), and the digestion and utilization of a large amount of by-product hydrogen chloride has become a problem. Common problems that restrict the development of chlorine-related industries such as chlor-alkali, polyurethane, pesticides, pharmaceutical chemicals, and fertilizers. In the polyurethane industry, the demand for TDI in domestic and foreign markets is increasing, and the generation of 1 molecule of TDI will be accompanied by the generation of 4 molecules...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/62B01J23/63C01B7/04
Inventor 杨建明石坚吕剑余秦伟惠丰袁俊张前赵锋伟李亚妮王为强梅苏宁
Owner XIAN MODERN CHEM RES INST
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