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Method for removing pigment in gulonic acid mother solution

A technology of gulonic acid and pigment, applied in the field of biochemical industry, can solve the problems of not achieving decolorization effect, increasing production cost, consuming large activated carbon, etc., to achieve the effect of improving product color, increasing product purity and yield, and reducing production cost

Active Publication Date: 2012-11-21
ANHUI BBCA FERMENTATION TECH ENG RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As we all know, the use of activated carbon for decolorization not only consumes a large amount of activated carbon and increases production costs, but also has low decolorization efficiency and basically fails to achieve a good decolorization effect; while the decolorization resin is cumbersome to operate during use, and consumes a large amount of alkali. Produce a large amount of alkaline waste liquid, which has a negative impact on the environment

Method used

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  • Method for removing pigment in gulonic acid mother solution

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Guronic acid mother liquor: 2-keto-L-gulonic acid content 22.6%, dry matter content 46.2%, gulonic acid purity 48.9%, pH value 1.12, protein content 4.2%, dark black.

[0027] 1. Activated carbon decolorization: Get five parts of above-mentioned gulong acid mother liquor, add the activated carbon that quality is mother liquor quality 0, 1%, 2%, 5%, 10% respectively and carry out decolorization treatment, the color of the solution after treatment is dark black. The resulting solution was taken to test its light transmittance, and the results were 0, 0, 0.1%, 0.2%, and 1%, respectively. Gulonic acid contents were 22.6%, 22.4%, 22.1%, 21.7%, 20.9%, dry matter contents were 46.0%, 45.8%, 45.2%, 44.6%, 44.0%, and gulon acid purity were 49.0%, 49.0%, 49.1%, 49.4%, 49.2%; pH values ​​were 1.12, 1.13, 1.25, 1.34, 1.28; protein contents were 4.1%, 4.0%, 3.8%, 3.2%, 2.9%; 98%, 98%, 97%, 95%; pigment removal rates were 10%, 12%, 15%, 22%, 24% respectively, basically no pigment re...

Embodiment 2

[0033] Guronic acid mother liquor: 2-keto-L-gulonic acid content 21.6%, dry matter content 46.2%, gulonic acid purity 46.7%, pH value 1.12, protein content 4.2%, dark black. Take gulon acid mother liquor, start the simulated moving bed sample injection process, adjust the water inlet rate to 46ml / min, the sample injection rate to 11ml / min, the wastewater outflow rate to 35ml / min, the product outflow rate to 22ml / min, and the backfill rate to 22ml / min. The obtained product is light red, the light transmittance is 62%, the content of gulonic acid is 10.5%, the content of dry matter is 17.36%, the purity of gulonic acid is 60.5%, the pH value is 2.81, the protein content is 0.26%, and the recovery rate of gulonic acid is 97.2%. , The pigment removal rate is 76%.

Embodiment 3

[0035] Guronic acid mother liquor: 2-keto-L-gulonic acid content 22.5%, dry matter content 45.3%, gulonic acid purity 44.6%, pH value 1.27, protein content 4.4%, dark black. Take gulon acid mother liquor, start the simulated moving bed sample injection process, adjust the water inlet rate to 60.5ml / min, the sample injection rate to 20ml / min, the wastewater outflow rate to 52ml / min, the product outflow rate to 19.5ml / min, and the backfill rate to 41ml / min min. The obtained product is light yellow, with a light transmittance of 79%, a gulon acid content of 11.2%, a dry matter content of 15.6%, a gulonic acid purity of 72%, a pH value of 2.16, a protein content of 0.21%, and a gulong acid recovery rate of 91.9%. , The pigment removal rate is 81%.

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Abstract

The invention relates to a method for removing pigment in gulonic acid mother solution, which is characterized in that a simulated moving bed filled with acidic cation resin is adopted, and water is used as a mobile phase. The method has a pigment removing rate of above 70%, is beneficial to enhancing the purity and the yield coefficient of the product and improving the luster of product greatly,and has the advantages of simple operation, low manufacturing cost, environment protection and the like, thus the method is more suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of biochemical industry, and in particular relates to a method for removing the pigment in guaronic acid mother liquor by adopting a simulated moving bed. Background technique [0002] 2-keto-L-gulonic acid (referred to as gulong acid, English abbreviated as KGA or 2-KLG) is an organic weak acid, and its main extraction methods include heating precipitation, chemical flocculation, ultrafiltration, and solvent extraction. , ion exchange method, etc. In the two-step fermentation and extraction method of KGA, because the gulong acid mother liquor contains a large amount of impurities such as pigments, colloids and other proteins, although it still contains a relatively high concentration of KGA, it is often rejected because it cannot crystallize qualified products. discharge, causing waste and environmental pollution. Therefore, it is necessary to recover the mother liquor of gulong acid, which can not only s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H7/027C02F1/42
Inventor 李荣杰尚海涛吴鹏举何玉春
Owner ANHUI BBCA FERMENTATION TECH ENG RES
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