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Propane dehydrogenation catalyst containing V and preparation method thereof

A propane dehydrogenation and catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of reducing catalyst activity stability and product selectivity, etc. problems, achieve the effects of improving olefin selectivity and catalyst stability, mature process technology, and inhibiting cracking

Active Publication Date: 2014-05-14
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

[0019] 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 the cerium nitrate equivalent to the molar number of Sn above, dissolve it 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

[0022] 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. Taking the molar number of Sn above as the base, weigh ammonium metavanadate according to Sn:V=1:2, dissolve it in deionized water, and set the volume to 48mL. 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...

example 3

[0024]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 1 wt% of the silica carrier, tin tetrachloride containing 0.3 g of Sn was weighed and dissolved in deionized water, and the volume was adjusted to 48 mL. Add to the above-mentioned carrier silica gel to impregnate, age for 3 hours, dry at 100°C for 4 hours, and bake at 600°C for 4 hours. Taking the molar number of Sn above as the base, weigh ammonium metavanadate according to Sn:V=1:2, dissolve it in deionized water, and set the volume to 48mL. Add it to the above sample for immersion, age for 3 hours, dry at 100°C for 8 hours, and bake at 600°C for 4 hours. Based on the final catalyst Pt content of 0.4wt%, weigh 0.12g 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 an...

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Abstract

The invention discloses a propane dehydrogenation catalyst, which employs silica as a carrier, Pt as a dehydrogenation active component, and Sn and V as auxiliary agents. The catalyst comprises, by weight, 0.1-2% preferably 0.2-0.8%, of dehydrogenation active component, and comprises, calculated by the weight of the carrier, 0.1-10% preferably 1-5%, of the auxiliary agent Sn, and 0.1-10% preferably 1-5% of the auxiliary agent V. A preparation method of the propane dehydrogenation catalyst is by loading auxiliary agents Sn and V and the active component Pt by using silica gel as a carrier through an impregnation method. The method can substantially increase the activity stability and olefin selectivity of the catalyst.

Description

technical field [0001] The invention relates to a V-containing propane dehydrogenation catalyst and a preparation method thereof, in particular to a V-containing propane dehydrogenation catalyst with silicon dioxide as a carrier and high olefin selectivity 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 o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/648C07C11/06C07C5/333
CPCY02P20/52
Inventor 张海娟李江红王振宇
Owner CHINA PETROLEUM & CHEM CORP
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