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Activated carbon column purification method

An activated carbon column and purification method technology, applied in chemical instruments and methods, separation methods, organic chemistry, etc., can solve the problems of easy clogging of activated carbon columns, prone to channeling, column pressure, etc., and achieve safe operation and high purification efficiency. Effect

Active Publication Date: 2016-03-09
CINIC CHEM SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is mainly used in the field of purification and absorption of gas in industry. There is no report on the purification and decolorization of liquid materials using powdered activated carbon. The main reasons and difficulties are: due to the finer particles of powdered activated carbon, the activated carbon column is easy to block, The column pressure is too high; channeling phenomenon is prone to occur during the purification process, so that the activated carbon cannot fully contact with the material, resulting in low purification production efficiency and other problems

Method used

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  • Activated carbon column purification method
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  • Activated carbon column purification method

Examples

Experimental program
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Effect test

Embodiment 1

[0027] In the stainless steel column, add powdered activated carbon with a size of 400 meshes, control the temperature in the column at 50°C, and the pressure at 0.05Mpa, prepare a 30% weight concentration of the compound to be purified isoacetic acid ester solution, and control the material feed rate 0.5cm / min, feed from the bottom of the column, after the feed liquid comes out from the top of the column, collect the qualified feed liquid.

[0028] The iso-acetate solution to be purified with a weight concentration of 30% is a solution containing compound (I), and the impurities therein are P1, P2, and P3.

Embodiment 2

[0030] In the stainless steel column, add powdered activated carbon with a size of 400 mesh, control the temperature inside the column at 50°C, and the pressure at 0Mpa (gauge pressure), prepare a solution of the compound to be purified with a weight concentration of 60%, and control the feed rate of the material 0.2cm / min, feed from the bottom of the column, after the feed liquid comes out from the top of the column, collect the qualified feed liquid.

[0031] The iso-acetate solution to be purified with a weight concentration of 60% is a solution containing the compound (II), and the impurities therein are P3, P4, and P5.

Embodiment 3

[0033] In the stainless steel column, add powdered activated carbon with a size of 200 mesh, control the temperature in the column at 80°C, and the pressure at 2Mpa (gauge pressure), prepare a solution of the compound to be purified with a concentration of 30%, and control the feed rate of the material to be 0.4cm / min, feeding from the bottom of the column, after the feed liquid comes out from the top of the column, collect the qualified feed liquid.

[0034] The isoacetic acid ester solution to be purified with a weight concentration of 30% is a solution containing the compound (III), and the impurities therein are P1 and P6.

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Abstract

The invention discloses a purifying method by activated charcoal columns. The method comprises the following steps: material liquor to be purified is fed to the activated charcoal columns filled with powdery activated charcoal as filler from the bottom; through a liquid dividing plate at the lower ends of the activated charcoal columns, purified liquor passes through a plurality of activated charcoal columns connected in series under the condition that the temperature is 10-80 DEG C, the pressure is 0-0.05Mpa and the flow rate is 0.1-1.5cm / min; the liquor flows out from the top of the last activated charcoal column, and is filtered by a second-level filter to obtain qualified purified liquid. The method disclosed by the invention guarantees that materials are fully contacted with activated charcoal, so that the problem of channeling, plugging and higher column pressure caused by the conventional method (feeding form the top of the activated charcoal columns and discharging from the bottom of the activated charcoal columns) can be avoided. The method is safe to operate, high in purifying efficiency and suitable for industrialized production.

Description

technical field [0001] The invention relates to a method for purifying impurities in liquid materials using a novel active carbon column. Background technique [0002] Activated carbon is a porous adsorption substance with a large specific surface area, and has strong decolorization and adsorption capabilities. It can adsorb part or completely remove impurities in the product, improve the crystallization purity of food, pharmaceutical intermediates and other compounds, improve the stability of the product, and improve the appearance and color. Activated carbon has been widely used in food production, pharmaceutical intermediates and other purification fields, specifically: [0003] [Purification and decolorization in sugar production] The decolorization of starch sugar in starch saccharification liquid has enzymatic method and acid hydrolysis method. The sugar solution produced by acid hydrolysis method contains the color-producing substance hydroxymethyl furfural. Add 1.2%...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/90C07C69/92C07C67/56B01D15/00B01D36/00
CPCB01D15/00C07C67/56C07C69/90C07C69/92
Inventor 孙松良
Owner CINIC CHEM SHANGHAI
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