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Adsorbent for purifying coal ethylene glycol and preparation method of adsorbent for purifying coal ethylene glycol

An adsorbent and ethylene glycol technology, applied in the field of purifying coal-based ethylene glycol quality adsorbent and its preparation, can solve problems such as low efficiency and achieve the effect of improving quality and quality

Inactive Publication Date: 2015-01-14
JIANGSU JINJU ALLOY MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method does not pay attention to the fact that the removal of salts by ion-exchange materials will cause the ion-exchange materials to fail quickly, and the efficiency of adsorption of UV-absorbing substances by activated carbon is very low

Method used

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  • Adsorbent for purifying coal ethylene glycol and preparation method of adsorbent for purifying coal ethylene glycol

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preparation example Construction

[0016] The preparation process of the adsorbent is the modification method of the adsorbent. The modified activated carbon adds metal ions, and these ions have a certain adsorption effect on trace impurities (mainly polar substances) in coal-based ethylene glycol, so that the relatively weak polar UV light-absorbing impurities in the ethylene glycol system are in the liquid It is in a favorable position in the competitive adsorption, so that the selectivity and adsorption capacity of the adsorbent can be greatly improved.

[0017] The purification effect of ethylene glycol is not only related to the physical and chemical properties of the adsorbent itself, but also the liquid phase space velocity and refining temperature are also closely related to the adsorption capacity of the adsorbent. Studies have shown that the refining temperature is 20-50 ° C, and the liquid phase space velocity is 1.5 hr -1 When the effect is obvious, other reaction conditions are less effective.

Embodiment

[0019] Preparation of adsorbent: Dissolve 100g of modified chitosan monomer in 1000g of water, stir at 80°C for 2h, then add 17.28g of ferric nitrate, 5.86g of copper nitrate, and 31.29g of ammonium phosphate, and stir evenly in a water bath at 100°C. And form a gel, dry in a vacuum oven at 150°C for 10h, and finally calcinate in a muffle furnace at 600°C for 2h to obtain the finished 2FelCu / C adsorbent.

[0020] Put the adsorbent sample into the adsorption bed. The adsorption bed is composed of 4 stainless steel tubes with a length of 50 cm and an inner diameter of 5. The bottom is equipped with a 200-mesh nylon mesh to prevent the fine powder from flowing out with ethylene glycol. The stainless steel tube is half filled with the adsorbent. Under the above conditions, control the refining temperature at 20-50°C, and the liquid phase space velocity at 2.5hr -1 After passing through the bed, test the light transmittance, acidity and chromaticity experiments before and after pas...

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Abstract

The invention relates to an adsorbent for purifying coal ethylene glycol and a preparation method of the adsorbent for purifying the coal ethylene glycol. The adsorbent is used for removing trace impurities including aldehydes, esters, acids, micro-molecular nitrogen oxides or organic amine compounds and the like in a coal ethylene glycol product. The invention relates to modified active carbon which is used as the adsorbent; the ethylene glycol passes through a bed layer filled with the adsorbent at a room temperature and the trace impurities which can influence the light transmittance can be electively remained in the bed layer so that the content of the impurities of the product is reduced; and the ultraviolet light transmittance and the acidity of the coal ethylene glycol are improved and the chromaticity of an ethylene glycol distilled residual solution is reduced. The refining temperature is 20-50 DEG C and the liquid-phase air speed is 1.5hr<-1>. After the treatment of the method, the purity of the ethylene glycol is improved by 0.5% and the ultraviolet light transmittance (UV) reach 88% at 220nm, reach 96% at 275nm and reach 99.5% at 350nm; the acidity can reach 1ppm-8ppm; and the chromaticity of the distilled residual solution reaches the level equal to that of petroleum ethylene glycol and the standards of polyester-grade products are reached.

Description

technical field [0001] The invention relates to an adsorbent for improving the quality of coal-based ethylene glycol, in particular to an adsorbent for purifying the quality of coal-based ethylene glycol and a preparation method thereof. Background technique [0002] The ethylene glycol synthesis process based on coal chemical industry has become a research hotspot due to its wide and low-cost raw material sources, high technical and economical efficiency, and many other advantages. Especially for my country, a country with a lot of coal and little oil, the development of coal process routes is of great significance. Ethylene glycol is an important organic chemical raw material. The ultraviolet light transmittance at 220nm wavelength is greater than 75%, 275nm is greater than 92%, and 350nm is greater than 98%. Ethylene glycol can be used to produce polyester fibers. Ethylene glycol products with unqualified UV transmittance will seriously affect the quality of fibers, such...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C07C31/20C07C29/76
CPCB01J20/20B01J20/02B01J2220/4806B01J2220/4825C07C29/76
Inventor 吴晓金孔国杰梁鹏张学岭吴维果
Owner JIANGSU JINJU ALLOY MATERIAL
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