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Small crystal grain stepwise pore SAPO-11 molecular sieve and hydrocarbon isomerization catalyst and their preparation methods

A SAPO-11, stepped hole technology, applied in molecular sieve catalyst, isomerization hydrocarbon production, molecular sieve and alkali exchange of phosphate, etc., can solve the problem of unsatisfactory performance improvement of SAPO-11 molecular sieve and low external surface area of ​​SAPO-11 molecular sieve , can not meet the reaction requirements and other problems, to achieve the effect of improving the diffusion limitation problem, solving the diffusion limitation problem, and reducing the grain size

Active Publication Date: 2016-07-27
PETROCHINA CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The patent application with the publication number CN103663493A discloses a method for preparing a mesoporous-microporous hierarchical structure SAPO-11 molecular sieve using cereal starch as a template, but the external surface area of ​​the SAPO-11 molecular sieve prepared by this method is relatively low , the improvement of the performance of SAPO-11 molecular sieve is not ideal
[0008] The patent application with the publication number CN103241745A discloses a preparation method of adding an alkylated organosilane to the synthesis system to obtain a small particle size SAPO-11 molecular sieve, but the small particle size SAPO-11 molecular sieve does not have a mesoporous structure, and the appearance The area is low and cannot meet the reaction requirements

Method used

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  • Small crystal grain stepwise pore SAPO-11 molecular sieve and hydrocarbon isomerization catalyst and their preparation methods
  • Small crystal grain stepwise pore SAPO-11 molecular sieve and hydrocarbon isomerization catalyst and their preparation methods
  • Small crystal grain stepwise pore SAPO-11 molecular sieve and hydrocarbon isomerization catalyst and their preparation methods

Examples

Experimental program
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Effect test

Embodiment 1

[0059] This embodiment provides a SAPO-11-P-De molecular sieve, the preparation method of which is the same as that of Comparative Example 1, the difference being that "9.0g of pseudo-boehmite and 5.0g of TPOS were slowly added successively under vigorous stirring. , 7.6g of DPA and 11.3g of propanol were stirred and mixed evenly" and changed to "slowly add 9.0g of pseudo-boehmite, 5.0g of TPOS, 7.6g of DPA, 0.053g of dedecyl trimethyl Ammonium bromide and 11.3g propanol are stirred and mixed evenly ", other conditions are constant, and the molecular sieve that makes is marked as SAPO-11-P-De.

[0060] The powder XRD diffraction pattern of this SAPO-11-P-De molecular sieve is as figure 1 As shown in the SAPO-11-P-De curve, the SEM image is as follows Figure 4 shown, its N 2 Adsorption-desorption isotherms such as figure 2 Shown in the SAPO-11-P-De curve.

[0061] This embodiment also provides a catalyst for isomerization of hydrocarbons, the preparation method of which i...

Embodiment 2

[0063] This example provides a SAPO-11-P-Do molecular sieve, the preparation method of which is the same as in Example 1, the difference is that "0.053g dedecyltrimethylammonium bromide" is changed to 0.058g dodecyl Trimethylammonium bromide ", other conditions are constant, and the molecular sieve that makes is denoted as SAPO-11-P-Do.

[0064] The powder XRD diffraction pattern of this SAPO-11-P-Do molecular sieve is as figure 1 As shown in the SAPO-11-P-Do curve, the SEM image is as follows Figure 5 shown, its N 2 Adsorption-desorption isotherms such as figure 2 Shown in the SAPO-11-P-Do curve.

[0065] This example also provides a hydrocarbon isomerization catalyst, the preparation method of which is the same as that of Example 1, and the prepared catalyst is recorded as NiMo / SAPO-11-P-Do.

Embodiment 3

[0067] This example provides a SAPO-11-P-T molecular sieve, the preparation method of which is the same as in Example 1, the difference is that "0.053g dedecyltrimethylammonium bromide" is changed to "0.063g tetradecyltrimethylammonium bromide" Methyl ammonium bromide ", other conditions are constant, and the molecular sieve prepared is recorded as SAPO-11-P-T.

[0068] The powder XRD diffraction pattern of this SAPO-11-P-T molecular sieve is as figure 1 As shown in the SAPO-11-P-T curve, the SEM image is shown in Figure 6 shown, its N 2 Adsorption-desorption isotherms such as figure 2 Shown in the SAPO-11-P-T curve.

[0069] This example also provides a hydrocarbon isomerization catalyst, the preparation method of which is the same as that of Example 1, and the prepared catalyst is marked as NiMo / SAPO-11-P-T.

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Abstract

The invention provides a small crystal grain stepwise pore SAPO-11 molecular sieve and a hydrocarbon isomerization catalyst and their preparation methods. The preparation method of the molecular sieve comprises dissolving a phosphorus source in water, carrying out stirring, orderly adding at least one aluminum source, at least one silicon source, at least one template, at least one cationic surfactant and at least one cosolvent into the solution, carrying out dissolution and crystallization to obtain crystals, cooling the crystals, carrying out centrifugation, washing and drying to obtain small crystal grain stepwise pore SAPO-11 molecular sieve raw powder, and roasting the small crystal grain stepwise pore SAPO-11 molecular sieve raw powder in air to obtain the small crystal grain stepwise pore SAPO-11 molecular sieve. The invention also provides the small crystal grain stepwise pore SAPO-11 molecular sieve obtained by the preparation method. The invention also provides the hydrocarbon isomerization catalyst with the small crystal grain stepwise pore SAPO-11 molecular sieve as a carrier and a preparation method thereof.

Description

technical field [0001] The invention relates to a molecular sieve, a catalyst and a preparation method thereof, in particular to a small-grain stepped hole SAPO-11 molecular sieve, a hydrocarbon isomerization catalyst and a preparation method thereof, and belongs to the technical field of preparation of molecular sieves and catalysts. Background technique [0002] According to statistics, as of November 2011, the number of automobiles in my country has reached 104 million. The rapid increase in the number of automobiles in my country has led to a rapid increase in the demand for vehicle fuel, and the air pollution caused by automobile exhaust emissions is also becoming more and more serious. In order to protect the environment, the quality control of gasoline, which is the most important petroleum processing product and automobile fuel, is becoming more and more strict all over the world. FCC gasoline accounts for the vast majority of the blending components of commercial g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B37/08C01B39/54B01J29/85B01J35/10C07C9/16C07C5/27
Inventor 范煜姚丽群王世华马婷吴耀光曾佑富牛文忠郭宝华张琴文佳卉邰忠阳
Owner PETROCHINA CO LTD
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