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Method for removing organic amine from beta-zeolite

A technology of beta zeolite and organic amine, which is applied in the field of organic amine removal, can solve the problems of easy loss, troublesome operation, unsafe zeolite framework aluminum, etc., and achieve the effect of less loss of framework aluminum, easy operation and less framework dealumination

Inactive Publication Date: 2005-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the problems of troublesome operation, unsafe or easy loss of zeolite framework aluminum in the above-mentioned documents, and provide a method for removing organic amines in zeolite beta

Method used

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  • Method for removing organic amine from beta-zeolite
  • Method for removing organic amine from beta-zeolite
  • Method for removing organic amine from beta-zeolite

Examples

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Effect test

Embodiment 1～5

[0033] Take 2 kg of unroasted industrially produced sodium-type zeolite beta dry powder (A1), without any pretreatment, pour it into the charging car, place the charging car on the track of the tunnel kiln, and directly carry out segmental constant temperature roasting. The tunnel kiln is in a state of natural ventilation during firing. The segmental constant temperature roasting is carried out in four segments in the air atmosphere, and the beta zeolites A2-A6 from which organic amines have been removed are obtained. The detailed firing process is listed in Table 1.

Embodiment 6

[0035] Take 2 kg of unroasted industrially produced sodium-type zeolite beta powder (A1), first adopt the method of Example 1 in CN1105646, carry out ammonium exchange, filter, wash, and dry to obtain ammonium-type beta zeolite. Then, the staged constant temperature calcination method in Example 4 of the present invention is used for calcination to obtain zeolite beta A7 from which organic amine has been removed.

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Abstract

The invention relates to a method for removing organic amines in beta zeolite, which mainly solves the problems of troublesome operation, unsafe operation or easy loss of zeolite framework aluminum in the prior art. The present invention preferably solves this problem by adopting the technical scheme of direct four-stage roasting in an air atmosphere. The four-stage roasting process is as follows: the first stage is fired at 110-180°C for 0.5-4.0 hours, and the second stage is fired at 230-300°C. ℃ for 1.0 to 6.0 hours, the third stage for 0.5 to 6.0 hours at 360 to 430°C, and the fourth stage for 2.0 to 10.0 hours at 530 to 580°C. The method of the present invention can be used in the industrial preparation of zeolite beta.

Description

technical field [0001] The invention relates to a method for removing organic amines from beta zeolite synthesized by an organic amine template. Specifically, the present invention relates to a method for removing the organic amine in the zeolite beta by directly roasting the raw powder of the zeolite beta in stages at constant temperature in an air atmosphere. Background technique [0002] Organic amine templates are widely used in the synthesis technology of various zeolite molecular sieves. However, it is difficult to remove organic amines from zeolites by ion exchange and other methods. The templating agent currently used to synthesize zeolite beta is usually tetraethylammonium hydroxide, tetraethylammonium bromide or their mixtures. The template agent exists in the pores of the zeolite molecular sieve and on the outer surface of the crystal grains, occupying a large amount of specific surface, blocking the pores of the zeolite molecular ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/04
Inventor 邢宇孔德金
Owner CHINA PETROLEUM & CHEM CORP
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