Preparation method and application of Pt/SAPO-11 dual-functional catalyst

A SAPO-11, dual-functional catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problem of weak interaction between metal active centers and molecular sieves, and achieve enhanced interaction and hydrogenation The effect of isomerization yield improvement

Active Publication Date: 2019-06-28
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the metal-molecular sieve system, at present, the preparation of bifunctional catalysts generally adopts the equal-volume impregnation method, and the metal active center is loaded on the molecular sieve carrier. The technical defect is that the interaction between the metal active center and the molecular sieve is weak.

Method used

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  • Preparation method and application of Pt/SAPO-11 dual-functional catalyst
  • Preparation method and application of Pt/SAPO-11 dual-functional catalyst
  • Preparation method and application of Pt/SAPO-11 dual-functional catalyst

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Experimental program
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Effect test

Embodiment 1

[0029] Di-n-propylamine is selected as the microporous template agent. Before the reaction, di-n-propylamine and phosphoric acid, the reaction raw material, are used to form di-n-propylamine phosphate. The reaction molar ratio of di-n-propylamine and phosphoric acid is 1:1.0-1:1.2.

[0030] 1.05 mL of H with a concentration of 0.245 mol / L 2 PtCl 6 The solution was impregnated onto 0.25g of white carbon black, impregnated at room temperature for 24h, dried, and sintered to obtain Pt / SiO 2 . Pt / SiO 2 After mixing with 2.912g of pseudo-boehmite and 6.28g of di-n-propylamine phosphate, grind for 10 minutes, put the obtained powder into the reaction kettle, crystallize at 200°C for 24 hours, and centrifuge the obtained product Washing, drying at 80°C and roasting at 600°C for 6h to obtain the final product. The resulting product was named SAPO-11-B. The loading of Pt in the obtained Pt / SAPO-11-B was about 0.7%.

Embodiment 2

[0040] 1.05 mL of Pt(NO with a concentration of 0.265 mol / L 3 ) 2 The solution was impregnated onto 0.25g of white carbon black, impregnated at room temperature for 24h, dried, and sintered to obtain Pt / SiO 2 . Pt / SiO 2 After mixing with 2.912g of pseudo-boehmite and 6.28g of di-n-propylamine phosphate, grind for 10 minutes, put the obtained powder into a reaction kettle, crystallize at 200°C for 24 hours, and centrifugally wash the obtained product , dried at 80°C and calcined at 600°C for 6h to obtain the final product.

Embodiment 3

[0042] 1.05 mL of Pt(NH 3 ) 4 Cl 2 The solution was impregnated onto 0.25g of white carbon black, impregnated at room temperature for 24h, dried, and sintered to obtain Pt / SiO 2 . Pt / SiO 2 After mixing with 2.912g of pseudo-boehmite and 6.28g of di-n-propylamine phosphate, grind for 10 minutes, put the obtained powder into a reaction kettle, crystallize at 200°C for 24 hours, and centrifugally wash the obtained product , dried at 80°C and calcined at 600°C for 6h to obtain the final product.

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Abstract

The invention discloses a preparation method and application of a Pt/SAPO-11 dual-functional catalyst, wherein the method comprises the following steps of: 1, loading Pt on an SiO2 carrier, and obtaining Pt/SiO2 after being subjected to impregnating in room temperature, drying and sintering; 2, mixing and grinding the Pt/SiO2 with an aluminum source, a microporous template agent and a phosphorus source according to a certain proportion, and carrying out crystallization reaction at 140-220 DEG C; and 3, after the reaction product is subjected to separation and drying, roasting to remove the template agent to obtain the Pt/SAPO-11 dual-functional catalyst. According to the preparation method, the Pt/SAPO-11 double-functional catalyst is prepared by adopting a pre-loading process, the interaction between metal and a carrier is enhanced, and the hydroisomerization yield of long-chain alkane is improved; and the hydroisomerization isomer yield of SAPO-11 molecular sieve to n-dodecane prepared by the preparation method is as high as 84%, and the liquid yield is maintained 99% or more.

Description

technical field [0001] The invention belongs to the technical field of molecular sieve catalysts, and in particular relates to a preparation method of a Pt / SAPO-11 bifunctional catalyst. Background technique [0002] Lubricating oil, known as the blood that maintains the normal operation of machinery, plays a pivotal role in the development of modern industry. Low temperature performance (high or low freezing point) is one of the important criteria to measure the quality of lubricating oil. By selectively isomerizing long-chain normal paraffins (Fischer-Tropsch waxes) in Fischer-Tropsch synthesis products into branched paraffins, the freezing point can be greatly reduced, and high-quality lubricating base oils with excellent low-temperature performance can be prepared. Therefore, the hydroisomerization reaction of Fischer-Tropsch wax is an important way to realize the efficient utilization of coal resources. [0003] The preparation of supported noble metal molecular sieve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85B01J35/10B01J37/02B01J37/08C01B37/08C01B39/54C10G45/64
Inventor 杜燕燕李久盛
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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