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Catalyst for dehydrogenating light alkane

A technology for dehydrogenation catalysts and low-carbon alkanes, which is applied in the direction of hydrocarbons, hydrocarbons, physical/chemical process catalysts, etc., and can solve the problem of low activity of low-carbon alkane dehydrogenation catalysts

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is the low activity of low-carbon alkane dehydrogenation catalysts in the prior art, providing a new low-carbon alkane dehydrogenation catalyst

Method used

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  • Catalyst for dehydrogenating light alkane
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  • Catalyst for dehydrogenating light alkane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Weigh 52.65 grams of chromium nitrate, 2.15 grams of potassium nitrate, 0.07 grams of phosphoric acid, and 0.0027 grams of gallium nitrate, add them to 100 milliliters of deionized water, then add 88.899 grams of alumina carrier, adjust the pH value of the solution to 3.5 with 2.5% ammonia water, After soaking in a water bath at 80°C for 1 hour, the sample was taken out for filtration, dried in an oven at 120°C for 8 hours, and then put into a muffle furnace and roasted at 550°C for 4 hours to obtain the desired catalyst. Adjust the flow rate of propane gas through the mass flow meter, enter the preheating zone for mixing, and then enter the reaction zone. Both the preheating zone and the reaction zone of the reactor are heated by electric heating wires to make them reach the predetermined temperature. The inner diameter of the reactor is Ф9mm— Ф6mm stainless steel casing, about 400mm long. After the reaction gas passes through the condensation tank, it enters the gas ch...

Embodiment 2

[0035] Weigh 52.65 grams of chromium nitrate, 2.15 grams of potassium nitrate, 0.07 grams of phosphoric acid, and 2.7 grams of gallium nitrate, add them to 100 milliliters of deionized water, then add 86.5 grams of alumina carrier, adjust the pH value of the solution to 3.5 with 2.5% ammonia water, After soaking in a water bath at 80°C for 1 hour, the sample was taken out for filtration, dried in an oven at 120°C for 8 hours, and then put into a muffle furnace and roasted at 550°C for 4 hours to obtain the desired catalyst. Evaluation conditions are the same as in Example 1, and the results are shown in Table 1.

[0036]

Embodiment 3

[0038] Weigh 52.65 grams of chromium nitrate, 2.15 grams of potassium nitrate, 0.07 grams of phosphoric acid, and 0.027 grams of gallium nitrate, add them to 100 milliliters of deionized water, then add 87.499 grams of alumina carrier, adjust the pH value of the solution to 3.5 with 2.5% ammonia water, After soaking in a water bath at 80°C for 1 hour, the sample was taken out for filtration, dried in an oven at 120°C for 8 hours, and then put into a muffle furnace and roasted at 550°C for 4 hours to obtain the desired catalyst. Evaluation conditions are the same as in Example 1, and the results are shown in Table 1.

[0039]

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Abstract

The invention relates to a catalyst for dehydrogenating light alkane in order to mainly solve the problem of relatively-low activity of a dehydrogenating catalyst prepared in the prior art. The problem is better solved through the technical scheme that the catalyst for dehydrogenating light alkane comprises the following components in parts by weight: 1-30 parts of a Cr element or an oxide of the Cr element (a), 0.1-5 parts of alkali metal oxides or alkaline earth metal oxides (b), 0.001-1 part of the group VA elements selected from a periodic table of elements or oxides of the group VA elements (c), 0.001-1 part of the group IIIA elements selected from the periodic table of elements or oxides of the group IIIA elements (d), and 54-99 parts of Al2O3 or SiO2 (e). The catalyst can be used for industrial production of light olefin prepared by dehydrogenating light alkane.

Description

technical field [0001] The invention relates to a catalyst for the dehydrogenation of low-carbon alkanes. Background technique [0002] Low-carbon olefins such as propylene and isobutylene are one of the most important organic raw materials in the petrochemical field. Among them, propylene is mainly used for the production of polypropylene, acrylonitrile, propylene oxide, etc., and isobutylene is mainly used for butyl rubber, polyisobutylene, etc., especially With the improvement of environmental protection requirements, the amount of additive MTBE in oil products has increased rapidly, which directly leads to a large demand gap for isobutene. Therefore, it is necessary to import a large amount of propylene and isobutene to meet domestic demand. At present, propylene and isobutene mainly come from ethylene co-production and refinery by-products. With the development of coal chemical industry, especially the realization of MTO, MTP and other processes, in addition to obtainin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/26C07C5/333C07C11/06C07C11/09
CPCY02P20/52
Inventor 吴省缪长喜刘瑞丹张磊
Owner CHINA PETROLEUM & CHEM CORP
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