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Low carbon alkane dehydrogenation olefin production catalyst and preparation method thereof

A low-carbon alkane and catalyst technology, which is applied in the field of catalysts for dehydrogenation of low-carbon alkanes to olefins and their preparation, can solve the problems of frequent regeneration, energy consumption, rapid deactivation, etc. The method is simple and easy to implement, and the effect of prolonging the service life

Inactive Publication Date: 2013-03-27
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst is sensitive to impurities, deactivates quickly, regenerates frequently, consumes a lot of energy, and brings huge pressure to the environment.

Method used

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  • Low carbon alkane dehydrogenation olefin production catalyst and preparation method thereof
  • Low carbon alkane dehydrogenation olefin production catalyst and preparation method thereof
  • Low carbon alkane dehydrogenation olefin production catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The composition of catalyst A is 0.375% Pt, 0.5% Au, 0.5% Sn, 1.4% K, 1.0% Cl and 0.2% S supported on γ-Al 2 o 3 superior. The preparation method is as follows:

[0024] (1) 0.5% Sn / Al 2 o 3 preparation of

[0025] A certain amount of carrier is placed in the dipping bottle, and SnCl equivalent to 0.5% Sn content will be prepared 2 The hydrochloric acid solution (equivalent to 2% of the weight of the alumina carrier) impregnating liquid is quickly put into the carrier, kept for 4 hours, and constantly shaken to make the impregnating evenly, and then the remaining impregnating liquid is poured out, taken out and dried, at 60°C and 120°C Bake for 4 hours each, and then pass air into the tubular furnace (SV=5000h -1 ), roasting at 550°C for 4 hours; then switch the air through a constant temperature water bath at 70°C, and treat with steam for 4 hours.

[0026] (2) 0.375%Pt~0.5%Au~0.5%Sn / Al 2 o 3 preparation of

[0027] 0.5% Sn / Al 2 o 3 Placed in the dipping bo...

Embodiment 2

[0038] The composition of catalyst B is 0.5% Pt, 0.5% Au, 0.5% Sn, 1.4% Li, 1.0% Cl and 0.2% S supported on γ-Al 2 o 3 superior. The preparation method is as follows:

[0039] (1) 0.5% Sn / Al 2 o 3 preparation of

[0040] A certain amount of carrier is placed in the dipping bottle, and SnCl equivalent to 0.5% Sn content will be prepared 2 The hydrochloric acid solution (equivalent to 2% of the weight of the alumina carrier) impregnating liquid is quickly put into the carrier, kept for 4 hours, and constantly shaken to make the impregnating evenly, and then the remaining impregnating liquid is poured out, taken out and dried, at 60°C and 120°C Bake for 4 hours each, and then pass air into the tubular furnace (SV=5000h -1 ), roasting at 550°C for 4 hours; then switch the air through a constant temperature water bath at 70°C, and treat with steam for 4 hours.

[0041] (2) 0.5%Pt~0.5%Au~0.5%Sn / Al 2 o 3 preparation of

[0042] 0.5% Sn / Al 2 o 3 Placed in the dipping bottl...

Embodiment 3

[0054] Catalyst C is composed of 0.375% Ru, 0.5% Au, 0.5% Sn, 1.4% K, 1.0% Cl and 0.2% S supported on ZSM-5 molecular sieve. The preparation method is the same as in Example 1, with H 2 PtCl 6 Change to RuCl 3 hydrochloric acid solution, the carrier was changed to ZSM-5. After elemental analysis, it can be seen that the actual load is consistent with the theoretical load.

[0055] The reaction performance of this catalyst is as shown in table 3:

[0056] Table 3. Propane dehydrogenation reaction performance

[0057]

[0058] Reaction conditions: reaction temperature 620°C, LHSV=3h -1 , H 2 / C 3 (mol / mol)=1, the reaction pressure is 1 atm.

[0059] The catalyst of this composition deactivates faster.

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Abstract

The present invention provides a low carbon alkane dehydrogenation olefin production catalyst and a preparation method thereof. According to the catalyst, a carrier is loaded with 0.01-5% by mass of a platinum group transition metal element, 0.01-10% by mass of a gold element, 0.01-10% by mass of a Group VIA metal element, and 0.01-10% by mass of an alkali metal element; or 0.2-15% by mass of a halogen element and 0.01-3% by mass of a sulfur element are added to be adopted as a modification component; the Group VIA metal element, the platinum group transition metal element, the gold element, the alkali metal element, the halogen element and the sulfur element are sequentially and respectively impregnated onto a carrier such as silica, a molecular sieve, magnesium-aluminum spinel or alumina, and a steam treatment is performed after the Group VIA metal element, the platinum group transition metal element and the gold element are impregnated and loaded on the carrier, wherein the Group VIA metal element, the platinum group transition metal element, the gold element, the alkali metal element, the halogen element and the sulfur element are adopted as catalyst components; and the catalyst has characteristics of high alkane conversion rate, high monoene selectivity and good stability.

Description

technical field [0001] The invention relates to a catalyst used for the dehydrogenation of low-carbon alkanes to olefins and a preparation method thereof. The catalyst is used for C 2-8 Dehydrogenation of alkanes, preferably for C 3-6 The dehydrogenation reaction of alkanes is more preferably used in the dehydrogenation reaction of propane, isobutane and n-butane. Background technique [0002] At present, China's two major oil companies have 10-million-ton oil refineries, and the catalytic cracking of these 10-million-ton oil refineries produces a large amount of ethane, propane, and C4 to C6 alkanes. Therefore, how to rationally utilize these resources and maximize the economic efficiency of industrial processes is an important scientific research topic that needs to be solved urgently. The dehydrogenation of light alkanes to olefins is a feasible process route. That is, the catalytic dehydrogenation of ethane, propane and alkanes from C4 to C6 to produce olefins and hy...

Claims

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Application Information

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IPC IPC(8): B01J23/66B01J29/44C07C5/333C07C11/09C07C11/08C07C11/06
CPCY02P20/52
Inventor 沈宜泓田志坚王晓化徐竹生阎立军解晓伟迟克彬曲炜罗琛王磊
Owner PETROCHINA CO LTD
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