Molecular sieve crystallization mother liquor treatment method

A treatment method and technology for crystallization mother liquor, applied in molecular sieve and alkali exchange phosphate, molecular sieve characteristic silicoaluminophosphate, distillation in boiler/distillate, etc. The effect of reducing labor intensity, avoiding leakage of harmful substances, and solving processing difficulties

Active Publication Date: 2017-02-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the problem that the residue after removal of water and organic amines in the crystallization mother liquor is easy to precipitate and coke, and is not easy to discharge in the prior art. A new treatment method for molecular sieve crystallization mother liquor is provided

Method used

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  • Molecular sieve crystallization mother liquor treatment method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] use figure 1 process shown. The crystallization mother liquor used is the filtrate obtained by filtration and separation after the synthesis of SAPO-34 molecular sieve. The triethylamine content of the template agent is 7.6%, and the total solid content of the mother liquor is about 9%. Set of steam heating, the working temperature is 39 ℃.

[0036] When starting to run, the vacuum pump will evacuate the decompression dehydration device system. After the vacuum reaches -0.091MPa, the liquid inlet valve will automatically open the liquid inlet, and the liquid inlet volume will be 250L / time; after the liquid inlet is completed, it will be heated with steam, and the steam pressure will be 0.17MPa, and start at the same time In-tank mixer.

[0037] The steam evaporated from the mother liquor is simply filtered by the aerosol dust collector and then enters the shell and tube condenser to condense to form a liquid. The condensate automatically enters the waste water storage...

Embodiment 2

[0043] According to the conditions and steps described in Example 1, the vacuum dehydration device obtains residues with a water content of 50-51%, and enters the vacuum belt dryer system for drying. Only the temperature of the heating zone is changed: the first zone is 130 ° C, the second Zone 100°C, third zone 40°C, other conditions are the same as in Example 1. The moisture content of the obtained discharged solid powder was 1.57%.

Embodiment 3

[0045] According to the conditions and steps described in Example 1, the vacuum dehydration device obtains a residue with a water content of 50-51%, and enters the vacuum belt dryer system for drying, only changing the heating temperature: the first zone 160 ° C, the second zone 160°C, 40°C in the third zone, other conditions are the same as in Example 1. The moisture content of the obtained discharged solid powder was 0.38%.

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Abstract

The invention relates to a molecular sieve crystallization mother liquor treatment method, which mainly solves the problems that in the prior art residues of crystallization mother liquor after water and organic amine are removed from the molecular sieve crystallization mother liquor are easy to precipitate and coke and difficult to discharge. The molecular sieve crystallization mother liquor treatment method is adopted and comprises the steps of performing reduced pressure dehydration, condensation liquid rectification and vacuum drying, recovering organic amine and the like, the problems are well solved, and the method can be applied to molecular sieve crystallization mother liquor treatment.

Description

technical field [0001] The invention relates to a method for treating a molecular sieve crystallization mother liquor, in particular to a method for treating a SAPO-34 molecular sieve crystallization mother liquor. Background technique [0002] Methanol-to-Olefin (MTO for short) refers to the process technology of using methanol, which is usually produced from natural gas or coal, to produce low-carbon olefins such as polymer-grade ethylene and propylene under the action of a catalyst. MTO technology has opened up a new process route for producing petrochemical products from non-petroleum resources, and has become one of the hot spots in the research and development of new energy resource technologies. According to my country's national conditions, the development of MTO technology using coal or natural gas as raw material can effectively improve the current situation of my country's shortage of oil resources and a large dependence on crude oil imports. [0003] With the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B37/08C01B39/54B01D3/02B01D3/42
CPCB01D3/02B01D3/42C01B37/08C01B39/54
Inventor 张少钢魏冬祥吴蔚应霆钧
Owner CHINA PETROLEUM & CHEM CORP
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