Isomerization catalyst and preparation method and application thereof

An isomerization and catalyst technology, applied in the field of isomerization catalyst and its preparation, can solve the problems of reducing the hydrogenation/dehydrogenation performance of the isomerization catalyst, affecting the isomerization activity, and low metal dispersion, and achieving outstanding performance. The effect of isomerization performance, reduction of sewage discharge, and simple preparation process

Active Publication Date: 2019-03-01
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the impregnation method is widely used in industrial production because of its simple process and easy control, but the non-precious metal catalyst prepared by this method has a low degree of metal dispersion, which will reduce the hydrogenation / dehydrogenation performance of the isomerization catalyst , thus affecting its isomerization activity
At the same time, the carrier impregnated in the metal solution needs to go through steps such as drying and roasting, which consumes a lot of energy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides an isomerization catalyst, and the preparation process of the catalyst is as follows:

[0033] (1) Mix pseudo-boehmite, phosphoric acid, silica sol, organic amine (di-n-propylamine) and active metal precursor (nickel nitrate hexahydrate) in the following molar ratio:

[0034] Pseudo-boehmite (with Al 2 O 3 Count): Phosphoric acid (in P 2 O 5 Count): Silica sol (in SiO 2 (Calculated): organic amine: active metal precursor (Re, in terms of metal atom): water = 0.8: 1.0: 0.4: 1.9: 0.125: 4.8 to obtain mixture A;

[0035] (2) The above-mentioned mixture A is mechanically stirred to form a gel-like substance (crystallization precursor);

[0036] (3) Place the above gelatinous substance in a high-pressure crystallization kettle and crystallize at a constant temperature of 200°C for 24 hours to obtain a crystalline product; filter and wash the crystalline product with deionized water 10 times the mass of the crystalline product, and then wash it at 100 After d...

Embodiment 2

[0039] This embodiment provides an isomerization catalyst, and the preparation process of the catalyst is as follows:

[0040] (1) Mix pseudo-boehmite, phosphoric acid, silica sol, organic amine (di-n-propylamine) and active metal precursor (nickel nitrate hexahydrate) in the following molar ratio:

[0041] Pseudo-boehmite (with Al 2 O 3 Count): Phosphoric acid (in P 2 O 5 Count): Silica sol (in SiO 2 (Calculated): organic amine: active metal precursor (Re, in terms of metal atom): water = 0.9: 1.0: 0.4: 1.8: 0.25: 5.6 to obtain mixture A;

[0042] (2) The above-mentioned mixture A is mechanically stirred to form a gel-like substance (crystallization precursor);

[0043] (3) Place the above gelatinous substance in a high-pressure crystallization kettle and crystallize at a constant temperature of 200°C for 24 hours to obtain a crystalline product; use deionized water 15 times the mass of the crystalline product to filter and wash the crystalline product, and then wash it at 110 Drying...

Embodiment 3

[0046] This embodiment provides an isomerization catalyst, and the preparation process of the catalyst is as follows:

[0047] (1) Mix pseudo-boehmite, phosphoric acid, silica sol, organic amine (di-n-propylamine) and active metal precursor (nickel nitrate hexahydrate) in the following molar ratio:

[0048] Pseudo-boehmite (with Al 2 O 3 Count): Phosphoric acid (in P 2 O 5 Count): Silica sol (in SiO 2 (Calculated): organic amine: metal precursor (Re, in terms of metal atom) = 1.0: 1.0: 0.4: 1.9: 0.19: 5.2 to obtain mixture A;

[0049] (2) The above-mentioned mixture A is mechanically stirred to form a gel-like substance (crystallization precursor);

[0050] (3) Place the above gelatinous substance in a high-pressure crystallization kettle and crystallize at a constant temperature of 200°C for 24 hours to obtain a crystalline product; filter and wash the crystalline product with deionized water 15 times the mass of the crystalline product, and then wash the crystalline product at 120°C....

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Abstract

The invention provides an isomerization catalyst and a preparation method and application thereof. The preparation method of the isomerization catalyst comprises the following steps: (1), mixing a rawmaterial for preparing an SAPO-11 molecular sieve and an active metal precursor of the isomerization catalyst to obtain a mixture A; (2), mechanically mixing the mixture A to obtain a gelatinous substance; (3), crystallizing the gelatinous substance, and washing, drying and calcinating a crystallized product to obtain the isomerization catalyst. According to a scheme provided by the invention, atechnology is simple and time-saving, and water is not required to be externally added as a mixed medium, so that a water resource is saved, sewage discharge is reduced and the environment is protected; the metal precursor is introduced into a carrier synthesizing system to achieve one-step synthesis of the catalyst, so that the drying and calcinating processes during metal loading are omitted andthe energy consumption is lowered; meanwhile, the catalyst shows relatively high n-hexane conversion rate and isomer selectivity.

Description

Technical field [0001] The invention belongs to the technical field of chemical engineering, and specifically relates to an isomerization catalyst and a preparation method and application thereof. Background technique [0002] The isomerization process is one of the ideal processes for the production of high-octane gasoline. This process does not introduce any sulfur-containing or nitrogen-containing compounds while increasing the gasoline octane number. The resulting gasoline has low olefin content and good stability. , And the key to developing the isomerization process lies in the research and development of high-performance catalysts. The catalyst used in the isomerization process is a dual-function catalyst, which is composed of a metal component with hydrogenation / dehydrogenation function and an acidic carrier with isomerization activity. At present, most of the metal components of catalysts are precious metals, but its high price and shortcomings of easy poisoning and dea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85C07C5/27C07C9/16
CPCB01J29/85B01J2229/18C07C5/277C07C2523/755C07C9/16
Inventor 刘欣梅吕玉超刘毓翔许露赵心馨王晓卉
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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