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SAPO-11 molecular sieve catalyst and its preparation method

A technology of SAPO-11 and molecular sieve, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of reducing catalytic performance, difficult to repeat SAPO-11 synthesis results, and unfavorable industrial scale-up and production of SAPO-11 and other problems, to achieve the effect of isomerization selectivity and isomerization yield improvement

Inactive Publication Date: 2002-11-20
FUDAN UNIV
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AI Technical Summary

Problems solved by technology

Using conventional synthesis methods, the synthesis results of SAPO-11 are often not easy to repeat, or more Si regions are easily formed to reduce the catalytic performance, which is not conducive to the industrial scale-up and production of SAPO-11

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Example 1. 5.0g of pseudoboehmite (water content 30%, Wenzhou Shuanghua Group), placed in 50mL of distilled water and vigorously stirred, slowly added 2.0g of white carbon black (99%, Shanghai Wujing Chemical Factory), 15 ℃ Stir vigorously for 30 minutes; slowly add 3.7mL phosphoric acid (AR, 85%, Shanghai Chemical Reagent Company), and stir vigorously for 40 minutes; slowly add 18mL diethylamine, continue stirring for 10 minutes, put into a stainless steel reactor, and then ℃ to crystallize for 2 hours, take it out, cool, filter, dry at 80 ℃, slowly heat up, first in N 2 Calcined at 550° C. for 20 hours in the atmosphere, and then calcined at 550° C. for 24 hours in the air atmosphere to obtain the calcined SAPO-11 sample. The solid sample yield is not less than 90%.

[0019] Example 2. 5.0g pseudo-boehmite (water content 30%, Wenzhou Shuanghua Group), placed in 86mL distilled water and vigorously stirred; slowly added 5.5mL phosphoric acid (AR, 85%, Shanghai Chemical...

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Abstract

The present invention uses cheap diethylamine as template agent, and can utilize higher crystallization temp. and shorter crystallization time to synthesize SAPO-11 molecular seive. Said molecular sieve has more SAPO zone and higher medium strong acid/weak acid proportion, and after the moble metal is supported, its selectivity for paraffine hydroisomerization reaction and its yield rate can be greatly raised.

Description

Technical field: [0001] The invention relates to a SAPO-11 molecular sieve catalyst and a preparation method thereof. Background technique: [0002] The n-alkanes in hydrocarbon oil, mainly long-chain n-alkanes, must reduce their content in order to improve oil performance. For example, for diesel oil or lubricating oil, the freezing point or pour point can be lowered by removing n-alkanes, which can significantly improve the low-temperature performance; it can also achieve the purpose of increasing the octane number by shape-selective isomerization of gasoline fractions. SAPO-11 molecular sieve has attracted much attention because of its special structure and acid properties, and its excellent hydroisomerization performance after loading noble metals. [0003] SAPO-11 molecular sieve belongs to AEL structure, space group Ima2, elliptical channel size is 0.39×0.63nm. The catalytic performance of SAPO-11 molecular sieve mainly depends on the position and environment where S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85C01B39/04C01B39/54C10G11/05C10G45/12
Inventor 王利军黄茜丹李全芝
Owner FUDAN UNIV
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