Decolorizing column for citric acid solution and application of decolorizing column

A citric acid solution and decolorization technology, which is applied in the direction of solid adsorbent liquid separation, separation/purification of carboxylic acid compounds, separation methods, etc., can solve the problem of poor adsorption capacity of macromolecular pigments and organic matter, affecting the light transmission of feed liquid, feed liquid Fast flow rate and other issues, to achieve high stability, reduce the amount of use, reduce the effect of acid and alkali use

Active Publication Date: 2018-08-10
RIZHAO JINHE BOYUAN BIOCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it was found in the experiment that the decolorizing resin has poor adsorption capacity for pigments with small molecular weight in the feed liquid, which affects the light transmission of the feed liquid. due to fast flow
The granular carbon is irregular sheet-like, the carbon column is dense, the carbon density is greater than that of the feed liquid, and the column flow rate is slow. The carbon column can adsorb small molecular weight pigments better, but has poor adsorption capacity for macromolecular pigments and organic matter.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A citric acid solution decolorization column, the technical scheme adopted is as follows:

[0030] The packing material and the volume ratio of the decolorizing column from the bottom of the column to the top of the column are: quartz sand, granular activated carbon, decolorizing resin, and quartz sand are 0.1:3:2:0.5.

[0031] The specific production steps are:

[0032] 1) Soak the quartz sand in demineralized water for 1 hour, then filter and wash until the washing water is clear and free of impurities.

[0033] 2) Soak the decolorized resin with 5% NaOH solution for 3h, then filter, wash the decolorized resin with demineralized water for 3 to 5 times until the pH value of the washing water is 7-8; then use 5% HCl solution on the washed decolorized resin Soak for 3 hours, filter and wash with demineralized water 3 to 5 times until the pH of the washing water is 6 to 7;

[0034] 3) Soak the granular activated carbon with 5% NaOH solution for 3 hours, then filter, wash the granu...

Embodiment 2

[0046] A citric acid solution decolorization column, the technical scheme adopted is as follows:

[0047] The packing material and the volume ratio of the decolorizing column from the bottom of the column to the top of the column are: quartz sand, granular activated carbon, decolorizing resin, and quartz sand are 0.5:2:3:0.1.

[0048] The specific production steps are:

[0049] 1) Soak the quartz sand in demineralized water for 2 hours, then filter and wash until the washing water is clear and free of impurities.

[0050] 2) Soak the decolorized resin with 5% NaOH solution for 5h, then filter, wash the decolorized resin with demineralized water for 3 to 5 times, until the pH value of the washing water is 7-8; then use the washed decolorized resin with 5% HCl solution Soak for 5 hours, filter and wash with demineralized water 3 to 5 times until the pH of the washing water is 6 to 7;

[0051] 3) Soak the granular activated carbon with 5% NaOH solution for 5 hours, then filter, wash the g...

Embodiment 3

[0063] A citric acid solution decolorization column, the technical scheme adopted is as follows:

[0064] The packing material and the volume ratio of the decolorizing column from the bottom to the top of the column are: quartz sand, granular activated carbon, decolorizing resin, and quartz sand are 0.3:2.5:2.5:0.3.

[0065] The specific production steps are:

[0066] 1) Soak the quartz sand in demineralized water for 1 hour, then filter and wash until the washing water is clear and free of impurities.

[0067] 2) Soak the decolorizing resin with 4% NaOH solution for 5 hours, then filter, wash the decolorized resin with demineralized water 3 to 5 times until the pH value of the washing water is 7 to 8; then use 4% HCl solution for the washed decolorized resin Soak for 5 hours, filter and wash with demineralized water 3 to 5 times until the pH of the washing water is 6 to 7;

[0068] 3) Soak the granular activated carbon with 4% NaOH solution for 5 hours, then filter, wash the granular ...

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Abstract

The invention belongs to the technical field of biological separation, and particularly relates to a decolorizing column for a citric acid solution and an application of the decolorizing column. The invention discloses the decolorizing column; and the decolorizing column is filled with quartz sand, granular activated carbon, decolorizing resin and quartz sand from the bottom of the column to the top of the column. The invention also discloses a preparation method of the above decolorizing column and a method for decolorizing the citric acid solution by utilizing the decolorizing column. The decolorizing column provided by the invention combines the advantages of strong ability of the decolorizing resin for adsorbing a macromolecular pigment and strong ability of the granular activated carbon for adsorbing a small molecular pigment, can remove a pigment in the citric acid solution more thoroughly, and can obtain a solution with very ideal light transmittance after the citric acid solution passes through the decolorizing column; and the method provided by the invention not only effectively reduces the pigment contained in the citric acid solution, but also greatly reduces a use number of the decolorizing column, reduces a use amount of acids and alkalis, reduces waste-water discharge, and reduces production costs.

Description

Technical field [0001] The invention belongs to the technical field of biological separation, and specifically relates to a citric acid solution decolorization column and its application. Background technique [0002] Citric acid, scientific name 2-hydroxypropane-1,2,3-tricarboxylic acid, molecular formula C 6 H 8 O 7 (Anhydrous), is an organic acid widely used in food, medicine and chemical industry. With the development of the economy, the demand for citric acid in all walks of life will steadily increase. Of course, the challenges and opportunities faced by enterprises are also increasing. It is mainly used in the food industry, pharmaceutical industry, and chemical industry, and also has a wide range of applications in industries such as electronics, textiles, petroleum, leather, construction, photography, plastics, casting and ceramics. [0003] my country is a big producer of citric acid. In the refining process of citric acid, the citric acid solution needs to be decoloriz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D15/20C07C51/47C07C59/265
CPCB01D15/206C07C51/47C07C59/265
Inventor 寇光智李昌涛刘长静蒋水星王有旭
Owner RIZHAO JINHE BOYUAN BIOCHEM
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