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Method for recycling silico-alumino-phosphate molecular sieve filtering fluid, and device for re-preparing molecular sieve

A silicon-aluminum-phosphorus molecular sieve and filter solution technology, which is applied in the direction of molecular sieve and alkali exchange phosphate, molecular sieve catalyst, molecular sieve characteristic silicon-aluminophosphate, etc., can solve the problems of large waste liquid discharge and high treatment cost, and reduce waste liquid emissions, reduce pollution, and improve efficiency

Inactive Publication Date: 2017-06-13
CHINA TIANCHEN ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of large waste liquid discharge and high treatment cost in the prior art, the present invention provides a method for reusing the filtrate of silicon aluminum phosphorus molecular sieve and a device for re-preparing molecular sieve

Method used

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  • Method for recycling silico-alumino-phosphate molecular sieve filtering fluid, and device for re-preparing molecular sieve
  • Method for recycling silico-alumino-phosphate molecular sieve filtering fluid, and device for re-preparing molecular sieve

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Experimental program
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Effect test

Embodiment 1

[0035] The filtrate obtained after the final stage of washing is added to the seed crystals ground to 0.2μm and mixed uniformly; and the obtained mixture is used as the mother liquor for preparing the new formula of silico-aluminum-phosphorus molecular sieve to prepare the new formula of silico-aluminum-phosphorus Molecular sieve. When preparing the new formula of silico-alumina-phosphorus molecular sieve, the mother liquor obtained above is put into the re-preparation molecular sieve device. The re-preparation molecular sieve device includes an oven 1, a ring filling tank 3 and several small synthesis reactors 5. The oven 1 The bottom of the inner cavity is provided with a controllable roller 4, the ring filling tank 3 lies on the roller 4, and the small synthesis kettle 5 is filled along the annular cavity of the ring filling tank 3. Installed and fixed. Put the mother liquor of the silico-alumino-phosphorus molecular sieve into each small synthesis kettle 5, turn on the pow...

Embodiment 2

[0040] The filtrate obtained after the final stage of washing is added to the seed crystals ground to 1 μm and mixed uniformly; and the obtained mixture is used as the mother liquor for preparing the new formula of silico-aluminum-phosphorus molecular sieve, and then the new formula of silico-aluminum-phosphorus molecular sieve is prepared . When preparing the new formula of silico-aluminum-phosphorus molecular sieve, the mother liquor obtained above is put into a molecular sieve device, and the silico-aluminum-phosphorus molecular sieve is prepared by heating and curing.

Embodiment 3

[0042] The filtrate obtained after the final stage of washing is added to the seed crystals ground to 0.6μm and mixed uniformly; and the obtained mixture is used as the mother liquor for preparing the new formula of silicoaluminophosphate molecular sieve to prepare the new formula of silicoaluminophosphate Molecular sieve. When preparing the new formula of silico-aluminum-phosphorus molecular sieve, the mother liquor obtained above is put into the molecular sieve device again, and the silico-aluminum-phosphorus molecular sieve is prepared by heating and curing.

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Abstract

The invention provides a method for reusing the filtrate of the silicon aluminum phosphorus molecular sieve and a device for re-preparing the molecular sieve, mainly aiming at the characteristics of the preparation process of the silicon aluminum phosphorus molecular sieve, and rationally using the filtrate produced in the synthesis process. The main idea of ​​this method is to make full use of the filtered solution of washed molecular sieves and add crystal seeds as the mother liquor for preparing silicon-aluminum-phosphorus molecular sieves to synthesize new molecular sieves, so as to improve the yield and catalytic performance of silicon-aluminum-phosphorus molecular sieves. The use efficiency and reduce the discharge of waste liquid, thereby reducing the pollution to the environment. In addition, the invention also provides a device for preparing the silicon-aluminum-phosphorus molecular sieve, through which molecular sieves of different formulations can be simultaneously synthesized, which greatly saves the research and development time and energy for preparing molecular sieves, improves experimental efficiency, and has outstanding promotion prospects.

Description

Technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for reusing silico-aluminum-phosphorus molecular sieve filtrate and a molecular sieve re-preparation device. Background technique [0002] Propylene is currently one of the most important bulk chemical products in the world and one of the basic chemical raw materials supporting my country's economic development. It can prepare a variety of basic organic raw materials. For example, propylene oxide, acrolein, allyl alcohol, isopropanol, carbon tetrachloride, butanol, etc. can be prepared. In recent years, due to the influence of downstream derivatives (especially polypropylene) demand, the demand for propylene has increased significantly. Due to the shortage of domestic propylene resources, it is far from meeting the needs of the domestic market, and the domestic self-sufficiency rate has fallen sharply, requiring a large amount of imports. With the fier...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/54C01B37/08B01J29/85C07C1/20C07C11/06
CPCY02P20/52C01B39/54B01J29/85C01B37/08C07C1/20C07C11/06
Inventor 刘俊生李欢王海国石华左宜赞马璐励娟
Owner CHINA TIANCHEN ENG
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