Supported rare earth-modified metal catalyst, and preparation method and application thereof

A metal catalyst and rare earth modification technology, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc. In order to improve the selectivity of methyl mercaptan, increase the conversion rate of methanol and stabilize the impregnation solution

Pending Publication Date: 2020-03-27
ZHEJIANG NHU CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to ThO 2 The catalyst has disadvantages such as harsh reaction conditions and low yield of methyl mercaptan. Researchers have conducted a lot of research on the catalyst
From the 1950s to the 1970s, the methanol-hydrogen sulfide route was industrialized abroad, and the catalyst was alumina, but the yield of m...

Method used

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  • Supported rare earth-modified metal catalyst, and preparation method and application thereof
  • Supported rare earth-modified metal catalyst, and preparation method and application thereof
  • Supported rare earth-modified metal catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Weigh 0.56g of lanthanum nitrate and dissolve it in 22g of deionized water, then add 40g of alumina carrier and impregnate for 6 hours, then dry at 80°C for 8 hours, and then bake at 450°C for 4 hours to make rare earth element modified oxide Aluminum carrier. The alumina carrier modified by the above-mentioned rare earth elements was impregnated in an alkali metal tungstate solution composed of 6.02g tungstic acid, 1.84g potassium hydroxide, 4.90g cesium hydroxide and 21g deionized water, and after 8 hours at 100 °C oven, and finally baked in a muffle furnace at 600 °C for 3 hours. The obtained catalyst La 2 o 3 content of 0.49%, alkali metal content of 9.89%, WO 3 The content is 19.56%.

Embodiment 2

[0047] Weigh 1.12g of lanthanum nitrate and dissolve it in 22g of deionized water, then add 40g of alumina support and impregnate for 6 hours, then dry at 80°C for 8 hours, and then bake at 450°C for 4 hours to make rare earth element modified oxide Aluminum carrier. The alumina carrier modified by the above rare earth elements was immersed in an alkali metal tungstate solution composed of 11.78g ammonium metatungstate, 2.46g potassium hydroxide, 3.68g cesium hydroxide and 21g deionized water. After 8 hours Dry it in an oven at 100°C, and finally heat it up to 600°C in a muffle furnace for 3 hours. The obtained catalyst La 2 o 3 content of 0.98%, alkali metal content of 8.15%, WO 3 The content is 19.68%.

Embodiment 3

[0049] Weigh 1.12g of cerium nitrate and dissolve it in 22g of deionized water, then add 40g of alumina carrier and impregnate for 6 hours, then dry at 80°C for 8 hours, and then bake at 450°C for 4 hours to make rare earth element-modified oxide Aluminum carrier. The alumina carrier modified by the above rare earth elements was immersed in an alkali metal tungstate solution composed of 11.78g ammonium metatungstate, 2.46g potassium hydroxide, 3.68g cesium hydroxide and 21g deionized water. After 8 hours Dry it in an oven at 100°C, and finally heat it up to 600°C in a muffle furnace for 3 hours. The obtained catalyst Ce 2 o 3 content of 0.95%, alkali metal content of 8.09%, WO 3 The content is 19.42%.

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Abstract

The invention discloses a supported rare earth-modified metal catalyst which comprises a rare earth element-modified alumina carrier and active components supported on the rare earth element-modifiedalumina carrier, and the active components comprise an alkali metal element and a tungsten element; in the supported rare earth-modified metal catalyst, the mass percentage content of rare earth elements is 0.4-5% based on oxide. After the rare earth elements are added into the supported rare earth-modified metal catalyst for modification, the supported rare earth-modified metal catalyst has better catalytic performance when applied to preparation of methyl mercaptan through a reaction of methanol and hydrogen sulfide, the selectivity and yield of methyl mercaptan are improved, and the reaction temperature and the circulation amount of hydrogen sulfide are reduced.

Description

technical field [0001] The invention belongs to the field of supported catalysts, and in particular relates to a supported rare earth modified metal catalyst and its preparation method and application. Background technique [0002] Methylmercaptan, known as methanethiol or methylmercaptan in English, is an important organic chemical raw material and a commonly used intermediate in organic synthesis. Sulfurylating reagents. The preparation of methyl mercaptan by methanol-hydrogen sulfide reaction is the main way to produce methyl mercaptan on a large scale at present. This route was first proposed in 1910, and the catalyst is ThO 2 . Due to ThO 2 The catalyst has disadvantages such as harsh reaction conditions and low yield of methyl mercaptan. Researchers have conducted a lot of research on the catalyst. From the 1950s to the 1970s, the methanol-hydrogen sulfide route was industrialized abroad, and the catalyst was alumina, but the yield of methyl mercaptan was only 60-7...

Claims

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Application Information

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IPC IPC(8): B01J23/30C07C321/04B01J37/02C07C319/08
CPCB01J23/30B01J23/10B01J37/0201C07C321/04C07C319/08
Inventor 洪润润刘洋王勇陈志荣王志轩于丽丽周明涛李其川胡一帆
Owner ZHEJIANG NHU CO LTD
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