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Method for synthesizing ZSM-35 molecular sieve by composite template agent

A technology of ZSM-35 and composite template agent, which is applied in the direction of molecular sieves and alkali exchange compounds, chemical instruments and methods, iron conglomerate crystalline aluminum silicate zeolite, etc., can solve the problems of high production cost and achieve short crystallization time , Good crystallization effect, good water solubility

Active Publication Date: 2018-06-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

high production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Dissolve 10kg of sodium metaaluminate and 3kg of sodium hydroxide completely in 60kg of desalted water to prepare sodium metaaluminate-sodium hydroxide aqueous solution; add 10kg of hexamethyleneimine to 50kg of cyclohexylamine and stir thoroughly to obtain Hexamethyleneimine-cyclohexylamine composite template. Add 100 kg of silica sol with a mass content of 30% into the gel forming tank, start stirring, add hexamethyleneimine-cyclohexylamine composite template agent, stir evenly, add sodium metaaluminate-sodium hydroxide aqueous solution dropwise to "thick After clicking ", increase the stirring speed, open the gel, and slowly add the remaining sodium metaaluminate-sodium hydroxide aqueous solution; then add 0.6kg NaZSM-35 molecular sieve, stir for 2 hours, and proceed to gelation.

[0042] Put the gelled slurry into a 500L crystallization kettle, start stirring at a stirring speed of 40r.p.m, and press the feeding port tightly; turn on the heat-conducting oil circulati...

Embodiment 2

[0044] 10kg of sodium metaaluminate and 1.2kg of sodium hydroxide are completely dissolved in 120kg of desalted water to prepare sodium metaaluminate-sodium hydroxide aqueous solution; 10kg of hexamethyleneimine is added to 20kg of cyclohexylamine and fully stirred to prepare A hexamethyleneimine-cyclohexylamine composite template was obtained. Add 100 kg of silica sol with a mass content of 30% into the gel forming tank, start stirring, add hexamethyleneimine-cyclohexylamine composite template agent, stir evenly, add sodium metaaluminate-sodium hydroxide aqueous solution dropwise to "thick After clicking ", increase the stirring speed, open the gel, and slowly add the remaining sodium metaaluminate-sodium hydroxide aqueous solution; then add 0.5kg NaZSM-35 molecular sieve, stir for 2 hours, and proceed to gelation.

[0045] Put the gelled slurry into a 500L crystallization kettle, start stirring at a stirring speed of 70r.p.m, and press the feeding port tightly; turn on the h...

Embodiment 3

[0047] 10kg of sodium metaaluminate and 1.2kg of sodium hydroxide are completely dissolved in 120kg of desalted water to prepare sodium metaaluminate-sodium hydroxide aqueous solution; 30kg of hexamethyleneimine is added to 80kg of cyclohexylamine and fully stirred to prepare A hexamethyleneimine-cyclohexylamine composite template was obtained. Add 100 kg of silica sol with a mass content of 30% into the gel forming tank, start stirring, add hexamethyleneimine-cyclohexylamine composite template agent, stir evenly, add sodium metaaluminate-sodium hydroxide aqueous solution dropwise to "thick After clicking ", increase the stirring speed, open the gel, and slowly add the remaining sodium metaaluminate-sodium hydroxide aqueous solution; then add 0.4kg NaZSM-35 molecular sieve, stir for 4 hours, and proceed to gelation.

[0048] Put the gelled slurry into a 500L crystallization kettle, start stirring at a stirring speed of 80r.p.m, and press the feeding port tightly; turn on the h...

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Abstract

The invention relates to a method for synthesizing a ZSM-35 molecular sieve by a composite template agent. The method comprises the following steps: dissolving sodium metaaluminate or sodium aluminateand alkali into desalted water to prepare a sodium metaaluminate-alkali aqueous solution or a sodium aluminate-alkali aqueous solution; adding hexamethylene imine into cyclohexane to prepare a composite template agent, adding the composite template agent into silicon sol, completely stirring, dropwise adding the sodium metaaluminate-alkali aqueous solution or the sodium aluminate-alkali aqueous solution until reaching a thick point, increasing the stirring speed, opening gel and slowly adding the residual sodium metaaluminate-alkali aqueous solution or the sodium aluminate-alkali aqueous solution; adding the ZSM-35 molecular sieve, stirring, gelatinizing and crystallizing, and synthesizing a high-nanoscale ZSM-35 molecular sieve.

Description

technical field [0001] The invention relates to a method for synthesizing ZSM-35 molecular sieves, in particular to a method for synthesizing ZSM-35 molecular sieves with a composite template. Background technique [0002] The structure of ZSM-35 molecular sieve is that the eight-membered ring channel and the six-membered ring channel intersect to form a spherical cage of 0.6nm to 0.7nm, which has good adsorption performance and good shape-selective catalytic performance; due to the molecular sieve structure, it is resistant to carbon deposition and loss With strong activity and large specific surface area, it can be used for alkylation of aromatic hydrocarbons, oligomerization of olefins, isomerization of xylene, isomerization of olefins, etc. The high-purity, nano-scale ZSM-35 molecular sieve has a larger specific surface area and better shape-selective catalytic performance. [0003] At present, the synthesis method of ZSM-35 molecular sieve mainly adopts hydrothermal st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/44B82Y40/00
CPCC01B39/445C01P2004/03C01P2004/62C01P2004/64
Inventor 赵胤邓广金李正侯立波崔龙李菁
Owner PETROCHINA CO LTD
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