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A kind of anti-coking platinum-based propane dehydrogenation propylene catalyst and preparation method thereof

A carbon deposition platinum-based propane and catalyst technology, which is applied in the field of anti-coking platinum-based propane dehydrogenation to propylene catalyst and its preparation field, can solve the problems of easy deactivation of carbon deposition and poor stability of the catalyst, and achieves the reduction of carbon deposition rate, Enhanced stability and reduced carbon deposits

Active Publication Date: 2020-03-03
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a catalyst for propane dehydrogenation to prepare propylene, aiming at the problem that the catalyst is easy to deactivate due to carbon deposition and poor stability. Aluminum [ZL201110196192.4] is used as the carrier, and the active component Pt, the first auxiliary agent Sn and the second auxiliary agent Ca are introduced into the catalyst by impregnation method / sedimentation method / mechanical mixing method, etc.

Method used

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  • A kind of anti-coking platinum-based propane dehydrogenation propylene catalyst and preparation method thereof
  • A kind of anti-coking platinum-based propane dehydrogenation propylene catalyst and preparation method thereof
  • A kind of anti-coking platinum-based propane dehydrogenation propylene catalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] Take 400μL 0.05g / mL Ca(NO 3 ) 2 Ethanol solution impregnated to 1g Al 2 o 3 On the carrier, let it stand at room temperature for 2h, and dry it overnight at 50°C, and the obtained sample was stored in 20% O 2 / N 2 Calcined at 500℃ for 4h in atmosphere; 13.27mg H 2 PtCl 6 ·6H 2 O and 14.94 mg SnCl 2 2H2 The O precursor was dissolved into 330 μL ethanol solution, and an equal volume of the above solution was impregnated into 1 g Al 2 o 3 - In the CaO carrier, the sample was left at room temperature for 2 hours after impregnation, and dried overnight in a 50°C oven. 2 / N 2 Atmosphere, calcination at 500°C for 4h, then in 20%H 2 / N 2 Atmosphere, 590°C reduction for 2 hours, the obtained catalyst sample is marked as A, and the evaluation results are shown in Table 1.

Embodiment 2

[0034] 24.60mg Ca(NO 3 ) 2 and 13.52 mg SnCl 2 2H 2 O dissolved in 300 μL water and impregnated to 1 g Al 2 o 3 On the carrier, let it stand at room temperature for 2h, and dry it overnight at 50°C, and the obtained sample was stored in 20% O 2 / N 2 Calcined at 500°C for 4h in the atmosphere; then 15.47mgH 2 PtCl 6 ·6H 2 The O precursor was dissolved into 330 μL water, and an equal volume of the solution was impregnated into 1 g Al 2 o 3 -CaO-SnO 2 In the carrier, the sample was left at room temperature for 2 hours after impregnation, and dried overnight in a 50°C oven. 2 / N 2 Atmosphere, calcination at 500°C for 4h, then in 20%H 2 / N 2 Atmosphere, 600°C reduction for 2h, the obtained catalyst sample is marked as B, and the evaluation results are shown in Table 1.

[0035] Table 1

[0036]

Embodiment 3

[0038] 32.80mg Ca(NO 3 ) 2 Dissolved in 300 μL water and impregnated to 1 g Al 2 o 3 On the carrier, let it stand at room temperature for 2h, and dry it overnight at 50°C, and the obtained sample was stored in 20% O 2 / N 2 Calcined at 500°C for 4h in the atmosphere; 14.94mg SnCl 2 2H 2 O dissolved in 300 μL water and impregnated to 1 g Al 2 o 3 - on the CaO carrier, let it stand at room temperature for 2h, and dry it in a 50°C oven overnight. 2 / N 2 In the atmosphere, calcined at 500°C for 4h; then 13.27mg H 2 PtCl 6 ·6H 2 The O precursor was dissolved into 330 μL water, and an equal volume of the solution was impregnated into 1 g Al 2 o 3 -CaO-SnO 2 In the carrier, the sample was left at room temperature for 2 hours after impregnation, and dried overnight in a 50°C oven. 2 / N 2 Atmosphere, calcination at 500°C for 4h, then in 20%H 2 / N 2 Atmosphere, 620°C reduction for 2h, the obtained catalyst sample is denoted as C, and the evaluation results are shown in ...

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Abstract

The invention discloses a noble metal catalyst for preparing propylene through propane dehydrogenation and a preparation method thereof, and is used for mainly solving the problems that a noble metal catalyst is prone to carbon deposition and deactivation at high temperature to affect the stability of the catalyst. The used catalyst can be represented by PtSnCa / Al2O3, that is to say, platinum and tin components are supported on an alumina carrier, and a second auxiliary agent calcium oxide is introduced, so as to improve the stability of the catalyst. The catalyst is adopted for catalysis of propane dehydrogenation to prepare propylene under conditions of the temperature of 590 DEG C and the pressure of less than 0.2 MPa, the life of the catalyst can reach 145 h, and the service life of the catalyst is greatly prolonged, so that the problem is relatively well solved. The catalyst is in favor of industrialized promotion of propane dehydrogenation for preparing propylene.

Description

technical field [0001] The invention relates to a carbon-deposition-resistant platinum-based propane dehydrogenation propylene catalyst and a preparation method thereof, belonging to the technical field of chemical catalysis. Background technique [0002] As the upstream raw material of the chemical industry, olefins are the basis for supporting the modern chemical industry. Among them, low-carbon olefins represented by propylene can be used to produce a series of downstream chemicals such as polymers and olefin oxides. In recent years, due to the increasing demand for downstream chemicals, the importance of propylene has become increasingly significant. Propylene is mainly derived from naphtha steam cracking to ethylene and petroleum refining catalytic cracking process, but the traditional propylene production technology has been difficult to meet the demand for propylene, so the development of new propylene production technology is particularly important. According to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/62C07C5/333C07C11/06
CPCB01J23/002B01J23/626B01J2523/00C07C5/3337C07C2521/04C07C2523/62B01J2523/23B01J2523/31B01J2523/43C07C11/06Y02P20/52
Inventor 陆安慧邓高明石磊李文翠
Owner DALIAN UNIV OF TECH
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