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Method for removing organic amine from beta-zoolite

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

Inactive Publication Date: 2003-09-24
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 new method for removing organic amines in zeolite beta

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 6

[0029] Take 2 kilograms of uncalcined industrially produced sodium beta zeolite powder (Al), first adopt the method of Example 1 in CN1105646, carry out ammonium exchange, filter, wash, and dry to obtain ammonium beta zeolite. Then, the stepwise constant temperature roasting method of Example 4 of the present invention is used for roasting to obtain β zeolite A7 from which organic amine has been removed. [Comparative example 1]

Embodiment 7

[0033] X-ray powder diffraction experiment (XRD) and X-ray powder diffraction experiment (XRD) were performed on β zeolite samples A1 to A7 and B1 to B3 in Examples 1 to 6 and Comparative Examples 1 to 2, respectively 29 Si MAS NMR and 27 Al NMR experiment, calculated the respective crystallinity, framework silicon to aluminum ratio, framework aluminum retention, framework aluminum loss and other data, the results are listed in Table 2. It can be seen from the data in Table 2 that the β zeolite prepared by the calcination method of the present invention has a framework aluminum loss of less than 15% and a crystallinity higher than 90, and the result is significantly better than the comparative example.

[0034] Instance

[0035] Example

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PUM

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Abstract

The present invention relates to a method for removing organic amine from beta-zeolite. It is aimed at mainly resolving the problems of previous techniques which are complex in operation and unsafe of whose zeolite skeleton aluminium is easy to lose. Said invention utilzies the adoption of direct four-stage roasting technical scheme in the air atmosphere so as to better resolve the above-mentioned problems. Said four-stage roasting process is as follows: first stage, roasting for 0.5-4.0 hr. at 110-180 deg.C; second stage, roasting for 1.0-6.0 hr. at 230-300 deg.C; third stage, roasting for 0.5-6.0 hr at 360-430 deg.C and fourth stage, roasting for 2.0-10.0 hr. at 530-580 deg.C.

Description

Technical field [0001] The invention relates to a method for removing organic amines in beta zeolite synthesized by using organic amine template agents. Specifically, the present invention relates to a method for removing organic amines from β zeolite by directly subjecting sodium-type β zeolite raw powder to stepwise constant temperature roasting in an air atmosphere. Background technique [0002] Organic amine templates are commonly used in the synthesis of a variety of zeolite molecular sieves. However, it is difficult to remove organic amines from zeolite by methods such as ion exchange. The template currently used to synthesize β zeolite is usually tetraethylammonium hydroxide, tetraethylammonium bromide or their mixtures. The template exists in the pores of the zeolite molecular sieve and on the outer surface of the crystal grains. It occupies a large amount of specific surface and blocks the pores of the zeolite, which seriously affects the uti...

Claims

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Application Information

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