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Preparation method of 4A zeolite filled cellulose acetate membrane and application thereof

A cellulose acetate membrane and cellulose acetate technology are applied in ether preparation, chemical instruments and methods, membrane technology and other directions to achieve the effects of low membrane production cost, abundant raw material sources and strong controllability

Inactive Publication Date: 2009-12-02
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pervaporation separation of methanol / MTBE mixture with 4A zeolite filled CA membrane prepared with acetone as solvent has not been reported in the literature

Method used

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  • Preparation method of 4A zeolite filled cellulose acetate membrane and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Dissolve 1.5 g of CA with 54.5 to 56.0 wt% bound acetic acid and 0.0075 g of ground 4A zeolite with an average particle size of 0.5 μm in 13.5 g of acetone, stir at a speed of 500 r / min for 1 h to dissolve CA, and then continue to The rotation speed of 500r / min and the ultrasonic power of 160w were combined to stir for 1h to obtain 15.0075g of a uniformly dispersed casting solution with a zeolite content of 0.5wt%. Let it stand for 10 minutes for defoaming to obtain a uniform and foam-free casting solution. Pour the foam-free casting solution on a clean glass plate, scrape the film with a 600 μm thick scraper, and dry it at 20°C for 2 hours to form a film (film 1), with an average thickness of 30 μm.

Embodiment 2

[0014] Dissolve 1.5 g of CA with 54.5-56.0 wt% bound acetic acid and 0.0151 g of ground 4A zeolite with an average particle size of 0.5 μm in 13.5 g of acetone, stir at a speed of 500 r / min for 1 h to dissolve CA, and then continue to The rotation speed of 500r / min and the ultrasonic power of 160w were combined to stir for 1h to obtain 15.0151g of uniformly dispersed zeolite content of 1wt% casting solution. Let it stand for 10 minutes for defoaming to obtain a uniform and foam-free casting solution. Pour the foam-free casting solution on a clean glass plate, scrape the film with a 600 μm thick scraper, and dry it at 20°C for 2 hours to form a film (film 2). The average thickness of the film is 30 μm.

Embodiment 3

[0016] Dissolve 1.5 g of CA with 54.5-56.0 wt% bound acetic acid and 0.0228 g of ground 4A zeolite with an average particle size of 0.5 μm in 13.5 g of acetone, stir at a speed of 500 r / min for 1 h to dissolve CA, and then continue to Combined stirring at a rotational speed of 500r / min and ultrasonic power of 160w for 1h, 15.0228g of a uniformly dispersed casting solution with a zeolite content of 1.5wt% was obtained. Let it stand for 10 minutes for defoaming to obtain a uniform and foam-free casting solution. Pour the foam-free casting solution on a clean glass plate, scrape the film with a 600 μm thick scraper, and dry it at 20°C for 2 hours to form a film (film 3), with an average thickness of 30 μm.

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Abstract

The invention relates to a preparation method of 4A zeolite filled cellulose acetate (CA) membrane and an application thereof; the preparation method comprises the following steps: adding cellulose acetate with a combination of 54.5-56.0wt% of acetic acid in acetone, mixing the mixture at room temperature for 1h till CA is completely resolved to obtain homogeneous solution with 10wt% of cellulose acetate content, adding 4A zeolite of which average grain diameter is 0.5mu m in acetone according to the zeolite-cellulose acetate weight ratio of 99.5:0.5-98:2, mixing the solution at 20-30 DEG C for 1-2h, continuing to mixing by ultrasonic agitation for 1-2h, standing and defoaming to obtain cast solution, pouring the cast solution on clean glass sheets, knifing membrane by scraper, aerating and drying the membrane at 20-30 DEG C for 2-3h to obtain the cellulose acetate membrane. The method has the advantages of simple membrane preparation process, strong controllability, rich sources of the raw materials, low price and low cost; the cellulose acetate membrane is used to separate methanol / MTBE mixture by pervaporation, the permeation flux is up to 202g-mh and the separation factor is 421.

Description

technical field [0001] The invention relates to a preparation method and application of a 4A zeolite filled cellulose acetate (CA) membrane. Background technique [0002] Pervaporation is a process that utilizes the different dissolution and diffusion properties of components in a liquid mixture to separate them in a dense film. Pervaporation technology is mainly used in the dehydration of organic matter, the removal of organic matter from water and the separation of organic / organic mixtures. Compared with traditional distillation, adsorption, extraction and other separation processes, it has the advantages of high separation efficiency, simple equipment, convenient operation and low energy consumption. Under certain conditions, pervaporation membrane separation technology has high selectivity. Therefore, pervaporation has very high separation efficiency for systems that are difficult or expensive to separate by conventional methods (near boiling, azeotropic systems). [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/16C07C41/34C07C43/04C07C31/04
Inventor 姜忠义马晓聪吴洪祖凤华方新朴佳锐郭瑞丽
Owner PETROCHINA CO LTD