A kind of dehydrogenation catalyst with silica as carrier and preparation method thereof

A dehydrogenation catalyst, catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of reducing catalyst activity stability and product selectivity, etc. To achieve excellent hydrogen dissociation ability, improve olefin selectivity and catalyst stability, and facilitate the dispersion of active metals

Active Publication Date: 2016-08-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on Pt-Sn catalysts based on silica as a carrier. This is mainly because the inert surface of silica makes Sn easy to reduce to zero valence and forms an alloy with Pt, which reduces the activity stability of the catalyst and the product. selectivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Weigh commercially available silica gel (pore volume 0.71cm3 / g, specific surface area 474m 2 / g, the silica gel used in the following examples) 30g, deionized water was added dropwise to initial moistening, and the volume of consumed water was 48mL. Based on the assumption that the Sn content accounts for 3 wt% of the silica carrier, tin tetrachloride containing 0.9 g of Sn was weighed and dissolved in deionized water, and the volume was adjusted to 48 mL. Add it to the above-mentioned carrier silica gel for impregnation, age for 3 hours, dry at 80°C for 8 hours, and bake at 500°C for 4 hours. Weigh copper nitrate in the same amount as the molar number of Sn above, dissolve in deionized water, and dilute to 48 mL. Add it to the above samples for immersion, age for 3 hours, dry at 80°C for 8 hours, and bake at 500°C for 4 hours. Based on the final catalyst Pt content of 0.6wt%, weigh 0.18g of Pt-containing chloroplatinic acid and dissolve it in deionized water, set the...

example 2

[0023] Weigh 30 g of commercially available silica gel, add deionized water dropwise to initial moistening, and the volume of consumed water is 48 mL. Based on the assumption that the Sn content accounts for 3 wt% of the silica carrier, tin tetrachloride containing 0.9 g of Sn was weighed and dissolved in deionized water, and the volume was adjusted to 48 mL. Add it to the above-mentioned carrier silica gel for impregnation, age for 3 hours, dry at 80°C for 8 hours, and bake at 500°C for 4 hours. Weigh ferric nitrate in the same amount as the molar number of Sn above, dissolve in deionized water, and dilute to 48 mL. Add it to the above samples for immersion, age for 3 hours, dry at 80°C for 8 hours, and bake at 500°C for 4 hours. Based on the final catalyst Pt content of 0.6wt%, weigh 0.18g of Pt-containing chloroplatinic acid and dissolve it in deionized water, set the volume to 48mL, add it to the above-mentioned sample impregnated with Sn and Fe, age for 3 hours, and dry ...

example 3

[0025] Weigh 30 g of commercially available silica gel, add deionized water dropwise to initial moistening, and the volume of consumed water is 48 mL. Based on the assumption that the Sn content accounts for 3 wt% of the silica carrier, tin tetrachloride containing 0.9 g of Sn was weighed and dissolved in deionized water, and the volume was adjusted to 48 mL. Add it to the above-mentioned carrier silica gel for impregnation, age for 3 hours, dry at 80°C for 8 hours, and bake at 500°C for 4 hours. Weigh cobalt nitrate in the same amount as the molar number of Sn above, dissolve in deionized water, and set the volume to 48 mL. Add it to the above samples for immersion, age for 3 hours, dry at 80°C for 8 hours, and bake at 500°C for 4 hours. Based on the final catalyst Pt content of 0.6wt%, weigh 0.18g of Pt-containing chloroplatinic acid and dissolve it in deionized water, set the volume to 48mL, add it to the above-mentioned sample impregnated with Sn and Co, age for 3 hours, an...

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Abstract

The invention discloses a dehydrogenation catalyst, which uses silica as a carrier, Pt as a dehydrogenation active component, Sn as a first aid, one or more metal of Cu, Fe, Co and Ni other as a second aid; and the catalyst comprises 0.1%-2% of the dehydrogenation active component, and calculated by the weight of the carrier 0.1-10 wt% of the first aid and 0.1-10 wt% of the second aid. A preparation method of the dehydrogenation catalyst is as below: loading the first aid Sn and the second aid, which is one or more selected from Cu, Fe, Co and Ni, and the active component Pt, by using silica gel as the carrier through an immersion method. This method can substantially increase the activity and stability of the catalyst and selectivity of alkene.

Description

technical field [0001] The invention relates to a dehydrogenation catalyst with silicon oxide as a carrier and a preparation method thereof, in particular to a propane dehydrogenation propylene catalyst with silicon oxide as a carrier and a preparation method thereof. Background technique [0002] Since the beginning of the new century, the demand for petrochemical raw materials and petrochemical products in the world will continue to grow, and the demand for propylene as a basic petrochemical raw material will continue to grow. However, the production capacity of conventional steam cracking and FCC technology cannot meet the rapidly growing demand for propylene, causing the market to emerge a global shortage. Moreover, with the increasing scarcity of petroleum resources, the production of propylene has changed from purely relying on petroleum as a raw material to diversifying the technical route of raw material sources, especially the technical route of producing olefins fr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89C07C11/06C07C5/333
CPCY02P20/52
Inventor 张海娟李江红王振宇
Owner CHINA PETROLEUM & CHEM CORP
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