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A kind of catalyst of propane dehydrogenation to propylene and its preparation and application

A propane dehydrogenation and catalyst technology, which is applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of platinum carbon deposition and deactivation of active center

Inactive Publication Date: 2020-08-28
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst of the present invention can improve the conversion rate of propane and the selectivity of propylene under the high-temperature reaction conditions of propane dehydrogenation to propylene, and solve the problem that the active center platinum is prone to carbon deposition and deactivation

Method used

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  • A kind of catalyst of propane dehydrogenation to propylene and its preparation and application
  • A kind of catalyst of propane dehydrogenation to propylene and its preparation and application
  • A kind of catalyst of propane dehydrogenation to propylene and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment prepares catalyst 1Pt-In-V / Al 2 o 3 (2D), and its catalytic performance in propane dehydrogenation to propylene was tested.

[0043] preparation:

[0044] (1) First, 8.4 g of NaOH powder was gradually dissolved in 100 g of deionized water, and stirred by magnetic force to obtain a clear and transparent solution.

[0045] Next, the mass of 19g of Al (NO 3 ) 3 9H 2 O powder was gradually added to the solution, and the clear solution gradually turned into a white cloudy liquid. After stirring at room temperature for 6 hours, the solution was transferred to a crystallization tank, aged at 170° C. for 24 hours, and washed by centrifugation several times. After drying at 80°C for 24 hours, and then roasting in a muffle furnace at 550°C, the final alumina sample was obtained, numbered Al 2 o 3 (2D).

[0046](2) Mix 0.0089g indium trichloride (US SIGMA-ALDRICH company, analytically pure) and 0.008g chloroplatinic acid hexahydrate (Sinopharm Chemical Rea...

Embodiment 2

[0050] This embodiment prepares catalyst 2Pt-In-Co / Al 2 o 3 (2D), and its catalytic performance in propane dehydrogenation to propylene was tested.

[0051] Preparation: The preparation method is the same as in Example 1, but the second auxiliary agent of the catalyst is different. The catalyst 2 is prepared with cobalt nitrate hexahydrate (Sinopharm Chemical Reagent Co., Ltd., analytically pure), and its composition is Pt-In-Co / Al 2 o 3 (2D).

[0052] Based on the total mass of catalyst 2, the mass content of each component in catalyst 2 is shown in Table 1.

[0053] Test: Fill the catalyst 2 in the miniature fixed bed reactor, the mass of the filled catalyst is 0.2g, and the volume space velocity of the propane gas is controlled to be 1000h -1 , the reaction pressure is normal pressure, the inlet temperature of the reactor is 590°C, and the reaction time is 12 hours. The reaction product is analyzed by a gas chromatograph SP-2100, and the catalyst activity obtained will ...

Embodiment 3

[0055] This embodiment prepares catalyst 3Pt-In-Ti / Al 2 o 3 (2D), and its catalytic performance in propane dehydrogenation to propylene was tested.

[0056] Preparation: The preparation method is the same as in Example 1, but the second auxiliary agent of the catalyst is different. Catalyst 3 is prepared with tetrabutyl titanate (Sinopharm Chemical Reagent Co., Ltd., analytically pure), and its composition is Pt-In-Ti / al 2 o 3 (2D).

[0057] Based on the total mass of catalyst 3, the mass content of each component in catalyst 3 is shown in Table 1.

[0058] Test: Fill the catalyst 3 in the miniature fixed bed reactor, the mass of the filled catalyst is 0.2g, and the volume space velocity of the propane gas is controlled to be 1000h -1 , the reaction pressure is normal pressure, the inlet temperature of the reactor is 590°C, and the reaction time is 12 hours. The reaction product is analyzed by a gas chromatograph SP-2100, and the catalyst activity obtained will be analyz...

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Abstract

The invention discloses a catalyst used for preparing propylene through propane dehydrogenation, and a preparation method and applications thereof. The catalyst comprises a carrier, and an active component, a first auxiliary agent, and a second auxiliary agent which are carrier by the carrier; the carrier is alumina, silica, a molecular sieve, zirconia, or titanium oxide; the active component is aplatinum group precious metal; the first auxiliary agent is indium; and the second auxiliary agent is a period four metal element. The catalyst is capable of increasing propane conversion rate and propylene selectivity under high temperature propane dehydrogenation preparation of propylene conditions, and solving a problem in the prior art at the same time that carbon deposition inactivation is easily caused by active centre platinum.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a catalyst for producing propylene from propane dehydrogenation and its preparation and application. Background technique [0002] Low-carbon olefins represented by propylene are widely used and are the basic raw materials for the further production of various chemical products in industry. It can be mainly used to prepare polypropylene (accounting for about 2 / 3 of the total consumption), various oxygen-containing compounds (propylene oxide, acetone, carbonyl alcohol, acrolein, acrylic acid, etc.), acrylonitrile, cumene, etc. important chemical products. [0003] The production methods of propylene include two traditional methods of naphtha cracking and refinery by-products. In addition, some new propylene manufacturing processes are also included. These include the heavy oil deep catalytic cracking (DCC) process, the main disadvantage of which is high cost and reduced gaso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/648B01J23/89B01J23/62B01J23/656B01J37/02B01J37/08B01J37/18C07C5/333C07C11/06
CPCY02P20/52
Inventor 刘坚熊鹏辉李响杨放韦岳长
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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