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Composite material and its preparation method and catalyst as well as its preparation method and application and method for propane dehydrogenation to propylene

A composite material and catalyst technology, which is applied in the direction of molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of unstable mesopore structure, low propane conversion rate and low propylene selectivity, and achieve simple post-processing, Good dehydrogenation activity and selectivity, good product repeatability

Active Publication Date: 2019-12-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to overcome the instability of the mesoporous structure in the prior art, which further leads to the defects that the conversion rate of propane and the selectivity of propylene are not high

Method used

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  • Composite material and its preparation method and catalyst as well as its preparation method and application and method for propane dehydrogenation to propylene
  • Composite material and its preparation method and catalyst as well as its preparation method and application and method for propane dehydrogenation to propylene
  • Composite material and its preparation method and catalyst as well as its preparation method and application and method for propane dehydrogenation to propylene

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Embodiment approach

[0043] Preferably, in step (1), the mixing and contacting conditions include: a temperature of 25-60°C and a time of 0.1-48h. In order to be more conducive to the uniform mixing of various substances, according to a preferred embodiment of the present invention, the mixing and contacting is carried out under stirring conditions.

[0044] In the present invention, the amount of the templating agent, the nonionic surfactant and the silicon source can vary within a wide range, such as the molar ratio of the template agent, the nonionic surfactant and the silicon source. Be (0.1-0.6): (0.1-0.5): 1; More preferably, the molar ratio of template agent, described nonionic surfactant and described silicon source consumption is (0.1-0.3): (0.1-0.3 ):1.

[0045] In the present invention, the silicon source can be various silicon sources conventionally used in the art, preferably the silicon source is ethyl orthosilicate, methyl orthosilicate, propyl orthosilicate, sodium orthosilicate a...

preparation example 1

[0076] Preparation Example 1: Preparation of composite material F1 containing spherical mesoporous molecular sieve C1 and ES955 silica gel A

[0077] (1) Add 1.5g (0.004mol) template agent CTAB (cetyltrimethylammonium bromide) and 1.5ml (0.002mol) polyethylene glycol octylphenyl ether (Triton-X100) Into the solution containing 37% by weight of hydrochloric acid (29.6g) and water (75g), stirred until CTAB was completely dissolved at 40°C; then 4.35g (0.02mol) ethyl orthosilicate was added to the above solution, in Stir at 40°C for 15 minutes, then transfer the resulting solution to a polytetrafluoroethylene-lined reactor, crystallize at 120°C for 24h, then filter and wash with deionized water 4 times, then suction filter and Drying to obtain the raw powder of mesoporous material; calcining the raw powder of mesoporous material at 600°C for 24 hours to remove the template agent to obtain spherical mesoporous molecular sieve C1;

[0078] (2) At 25° C., 20 g of spherical mesoporo...

preparation example 2

[0085] Preparation Example 2: Preparation of composite material F2 containing spherical mesoporous molecular sieve C2 and ES955 silica gel B

[0086] (1) Add 0.75g (0.002mol) template agent CTAB (cetyltrimethylammonium bromide) and 3ml (0.004mol) polyethylene glycol octylphenyl ether (Triton-X100) to In the solution that contains 37% by weight of hydrochloric acid (29.6g) and water (75g), stir until CTAB dissolves completely at 40 ℃; Then 4.35g (0.02mol) ethyl orthosilicate is added in the above-mentioned solution, at 40 After stirring for 15 minutes at ℃, the resulting solution was transferred to a polytetrafluoroethylene-lined reactor, crystallized at 100℃ for 24 h, then filtered and washed 4 times with deionized water, then suction filtered and dried , to obtain the raw powder of the mesoporous material; calcining the raw powder of the mesoporous material at 600° C. for 24 hours to remove the template agent to obtain spherical mesoporous molecular sieve C2;

[0087] (2) At...

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Abstract

The invention discloses a composite material and a preparation method thereof, a catalyst containing the composite material and a preparation method and application thereof, and a method for preparingpropylene through propane dehydrogenation, belonging to the field of catalysts. The composite material comprises silica gel and a spherical mesoporous molecular sieve, wherein the spherical mesoporous molecular sieve has a pore volume of 0.5-1.5 mL / g, a specific surface area of 1000-1500 m<2> / g, an average pore size of 1-2.5 nm and an average particle size of 1 to 20 [mu]m, and the silica gel has a specific surface area of 200-300 m<2> / g, a pore volume of 1-2 mL / g, an average pore size of 10-30 nm and an average particle size of 20-100 [mu]m. The composite material containing the spherical mesoporous molecular sieve and the silica gel provided in the invention has the advantage of structural stability, and can form the catalyst together with a component Pt, a component Sn and a component Na; and when the catalyst is used in the reaction of propane dehydrogenation for preparation of propylene, both the conversion of propane and the selectivity of propylene are significantly improved compared with the prior art.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a composite material and a preparation method thereof, a catalyst containing the composite material, a preparation method and application thereof, and a method for producing propylene from propane dehydrogenation. Background technique [0002] Propylene is the basic raw material of petrochemical industry, mainly used in the production of polypropylene, acrylonitrile, acetone, propylene oxide, acrylic acid and butyl octanol. Half of the supply of propylene comes from refinery by-products, another about 45% comes from steam cracking, and a small amount of other alternative technologies. In recent years, the demand for propylene has been increasing year by year, and the traditional propylene production can no longer meet the demand for propylene in the chemical industry. Therefore, increasing the production of propylene has become a hot research topic. Among them, propane dehydrogenation t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J35/08B01J35/10B01J29/068C07C5/333C07C11/06
CPCB01J29/068B01J35/023B01J35/08B01J35/1019B01J35/1028B01J35/1042B01J35/1047B01J35/1057B01J35/1061B01J2229/186B01J2229/26C07C5/3337C07C11/06Y02P20/52
Inventor 亢宇刘红梅张明森
Owner CHINA PETROLEUM & CHEM CORP
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