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A kind of separation method of aqueous organic matter

A separation method and technology for organic substances, which can be applied in separation methods, purification/separation/stabilization of organic compounds, organic chemical methods, etc., and can solve the problems of reducing the utilization rate of molecular sieve moldings.

Active Publication Date: 2017-03-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the utilization rate of molecular sieve moldings is reduced due to dealumination of the molecular sieve framework during use, the present invention provides a method for separating organic matter containing water, which can realize partial or complete supplementation of aluminum in the molecular sieve framework during the separation process.

Method used

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  • A kind of separation method of aqueous organic matter
  • A kind of separation method of aqueous organic matter
  • A kind of separation method of aqueous organic matter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of molecular sieve moldings capable of self-complementing aluminum: hydrophilic ZSM-5 molecular sieve and binder Al 2 o 3The coating film is formed, and the modifying elements are introduced through the impregnation method. The weight composition of the molecular sieve molding is: ZSM-5 molecular sieve 60%, Ge element 1%, Al 2 o 3 34%. The molecular sieve molding 27 Al NMR spectrum see figure 1 , the weight content of skeleton aluminum is calculated to be 16.92% by peak integration.

[0034] Separation process: the acetic acid-water mixture (the volume content of acetic acid is 70%) is passed into a tower filled with a molecular sieve molding film for separation. Using vapor permeation separation, water molecules preferentially pass through the molecular sieve molding membrane. Adjust the feed rate to achieve the required amount of water in the effluent. After adsorption at 70°C for 10 hours, the feeding of the acetic acid-water mixture was stopped. ...

Embodiment 2

[0038] Preparation of molecular sieve moldings that can self-replenish aluminum: 4A molecular sieve is extruded with binder pseudo-boehmite and silica-alumina gel, and modifying elements are introduced by mechanical mixing. The molecular sieve molding weight composition is: 4A molecular sieve 55%, Al 2 o 3 35%, SiO 2 10%, the calculated skeleton aluminum weight content is 18.62%.

[0039] Separation process: the dichloromethane-water mixture (volume content of water is 0.2%) is passed into a tower filled with molecular sieve moldings for separation. With adsorption separation, water is preferentially adsorbed by molecular sieve moldings. Adjust the feed rate so that the water content in the effluent meets the requirements. After 20 hours of adsorption at 40°C, the feed of the dichloromethane-water mixture was stopped. The molecular sieve molded product was desorbed by maintaining at 200° C. for 8 hours. After 2,000 hours of adsorption-desorption operation, the molecular ...

Embodiment 3

[0042] Preparation of molecular sieve moldings that can self-replenish aluminum: 4A molecular sieve and adhesive silica-alumina gel coating film molding, the carrier is an inert ceramic tube. The weight composition of molecular sieve molding is: molecular sieve 65%, Al 2 o 3 30%, SiO 2 5%. through 27 According to Al NMR, the aluminum content of the framework is 15.12%.

[0043] Separation process: the ethylene glycol-water mixture (the volume content of water is 80%) is passed into a tower filled with a molecular sieve formed product membrane for separation. With vapor permeation separation, water molecules are adsorbed in gaseous form and pass through the membrane pores of molecular sieve moldings. Adjust the feed rate to achieve the required amount of water in the effluent. After adsorption at 120° C. for 100 hours, the feeding of the ethylene glycol-water mixture was stopped. The molecular sieve molded product was desorbed by maintaining at 300° C. for 15 hours. Aft...

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Abstract

The invention relates to a separation method for an aqueous organic matter. The method comprises the following steps: step A, preparation of a molecular sieve molding matter capable of replenishing aluminum voluntarily: taking a molecular sieve as an active component, and adding an aluminum compound and a modifying element to mold and calcine the molecular sieve so as to obtain the molecular sieve molding matter; step B, enabling a mixture of water and the organic matter to pass through the molecular sieve, and adsorbing one of the water and the organic matter by the molecular sieve molding matter so as to separate the water from the organic matter; releasing the water or organic matter adsorbed in the molecular sieve molding matter in a heating desorption mode, and carrying out adsorption-desorption operation repeatedly so that framework aluminum of the molecular sieve molding matter partially or completely loses and the molecular sieve molding matter becomes an inactivated molecular sieve molding matter; and step C, aluminum replenished regeneration: maintaining the inactivated molecular sieve molding matter in a mixed gas of oxygen and inert gas for 4-120 hours at the temperature of 500-800 DEG C, so that the activity of the molecular sieve molding matter is partially or completely recovered.

Description

technical field [0001] The invention relates to a method for separating aqueous organic matter. Background technique [0002] Molecular sieves are widely used in different chemical reactions and adsorption processes due to their unique pore structure and acidity. Because they have cations and negatively charged silicon-aluminum-oxygen frameworks, cations give a strong positive electric field and attract polar molecules. The stronger the polarity or the easier the polarized molecule is, the easier it is to be adsorbed, so as to separate different substances. Specific application examples such as gas separation (oxygen and nitrogen separation, CH 4 / N 2 Separation, CO / N 2 Separation, etc.), gas purification (such as selective adsorption of nitrogen oxides, sulfur dioxide, carbon dioxide, etc.), wastewater treatment (such as treatment of metal-containing ions) and separation of aqueous mixtures (such as alcohol-water and organic acid-water systems). [0003] The temperature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07B63/00C07C17/389C07C19/03C07C29/76C07C31/12C07C31/20C07C51/47C07C53/08B01J20/18B01J20/30B01J20/34
Inventor 吉媛媛
Owner CHINA PETROLEUM & CHEM CORP
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