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Alkane dehydrogenation sulfide catalyst and alkane dehydrogenation method

A technology for alkane dehydrogenation and catalysts, applied in the direction of physical/chemical process catalysts, hydrocarbons, hydrocarbons, etc., to achieve high yield, slow deactivation, and low price

Inactive Publication Date: 2014-06-18
江苏省海洋石化股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem with this catalyst is that there is a certain contradiction between the single-pass conversion rate of alkanes and the selectivity to generate corresponding olefins, especially for propane dehydrogenation, the contradiction between the single-pass conversion rate of propane and the selectivity of propylene is more serious. to stand out

Method used

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  • Alkane dehydrogenation sulfide catalyst and alkane dehydrogenation method
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  • Alkane dehydrogenation sulfide catalyst and alkane dehydrogenation method

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Add 529.4 g of deionized water to 132.4 g of pseudoboehmite, stir well in a water bath at 80° C., add hydrochloric acid to form a gel, and adjust the pH value to about 3. Weigh the nickel sulfate (Ni(SO) of 31.8g 4 ) 2 ·6H 2 O) Add to the prepared gel, add 50g of deionized water, stir evenly, dry at 120°C for 8h, then roast at 600°C for 12h, finally grind and sieve to get 80-180 mesh particles for later use. During the reaction process, in order to maintain the sulfide state of the active components of the catalyst, 300 μg / g (calculated as sulfur element) hydrogen sulfide is introduced into the feed and transported to the catalyst bed along with the raw materials. The catalyst evaluation results showed that the conversion rate of isobutane was 70.48wt%, the yield of isobutene was 56.31wt%, and the selectivity of isobutene was 79.89wt%.

Embodiment 2

[0033] Weigh 90g silicon oxide (SiO 2 ) as a carrier, 50.5g iron nitrate (Fe(NO 3 ) 3 9H 2 O) Dissolve in 80g deionized water and stir well. Impregnated Fe(NO 3 ) 3 solution, dried at 140°C for 10h, then weighed 13.8g of ammonium sulfate ((NH 4 ) 2 SO 4 ) was dissolved in water, impregnated on the catalyst, dried at 140°C for 8h, and then calcined at 600°C for 12h. During the reaction process, in order to maintain the vulcanized state of the active components of the catalyst, 250 μg / g (calculated as elemental sulfur) of sulfur dioxide is introduced into the feed and transported to the catalyst bed along with the raw materials. The catalyst evaluation results showed that the conversion rate of isobutane was 47.60wt%, the yield of isobutene was 40.88wt%, and the selectivity of isobutene was 85.89wt%.

Embodiment 3

[0035] Weigh 90g zirconia (ZrO 2 ) as a carrier, 35.1g cobalt nitrate (Co(NO 3 ) 2 ·6H 2 O) Dissolve in 80g deionized water and stir well. Co(NO) impregnated on zirconia 3 ) 2 solution, dried at 140°C for 9h, then weighed 10.2g of sulfuric acid (H 2 SO 4 ) and diluted, impregnated on the catalyst, dried at 140°C for 10h, and then calcined at 600°C for 12h. During the reaction process, in order to maintain the sulfidation state of the active components of the catalyst, 300 μg / g (calculated as sulfur element) carbon disulfide is introduced into the feed and transported to the catalyst bed along with the raw materials. The catalyst evaluation results showed that the conversion rate of isobutane was 47.79wt%, the yield of isobutene was 41.90wt%, and the selectivity of isobutene was 87.69wt%.

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Abstract

The present invention provides an alkane dehydrogenation sulfide catalyst, which comprises an active ingredient and a carrier, wherein the active ingredient comprises one or a plurality of elements selected from Fe, Co, Ni, Cu, Zn, Mo, W and Mn, the active ingredient content in the catalyst (calculated as the oxide having the highest valence) is 0.5-40 wt%, the carrier is a mixed oxide or a composite oxide formed from one or a plurality of materials selected from SiO2, Al2O3, ZrO2, La2O3, CeO2, CaO, P2O5, Nb2O5 and MgO, the carrier content is 60-99.5 wt%, and the active ingredient on the surface of the alkane dehydrogenation sulfide catalyst exists in a sulfide form. When the catalyst is adopted for the alkane dehydrogenation reaction, characteristics of high activity, high selectivity, good stability, slow deactivation, low cost and no environment pollution are provided.

Description

technical field [0001] The invention relates to an alkane dehydrogenation catalyst, in particular to an alkane dehydrogenation sulfide catalyst and a preparation method of the catalyst. Background technique [0002] Propylene and butene are important chemical raw materials. The dehydrogenation of propane and butane to produce propylene and butene is not only conducive to the conversion of cheap alkanes into high value-added olefins, but also the by-production of hydrogen, which is useful for oil refining. Chemical processes provide cheap hydrogen resources. [0003] There are two types of existing catalysts: one is a supported Pt catalyst, and the other is a supported Cr 2 o 3 catalyst. Supported Pt catalysts are expensive, supported Cr 2 o 3 Cr in the catalyst 6+ highly toxic. [0004] From the point of view of the currently applied process technology, the Oleflex moving bed technology of UOP Company is the most widely used, which uses a supported Pt catalyst. The C...

Claims

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Application Information

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IPC IPC(8): B01J27/043B01J27/04B01J27/051B01J27/047C07C11/09C07C11/06C07C5/333
CPCY02P20/52
Inventor 李春义王国玮
Owner 江苏省海洋石化股份有限公司
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