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A method for recovering organic acid from waste liquid after extracting pigment from roselle

A technology of roselle and organic acid, applied in the directions of organic dyes, chemical instruments and methods, azo dyes, etc., can solve problems such as unreported extraction research, achieve broad application prospects, low production costs, and reduce pollution.

Active Publication Date: 2017-03-01
QINGDAO PENGYUAN KANGHUA NATURAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the research on roselle at home and abroad is mainly focused on the development of roselle food, such as the patent application of roselle rice dumpling (application number: 200810058938.3), roselle moon cake (application number: 200810058939.8), and roselle red pigment The extraction research of roselle red pigment and its preparation method (application number: 200910197981.2) is described in the patent application, but the extraction research of organic acids in roselle calyx and receptacle has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for recovering organic acid from waste liquid after extracting pigment from roselle, is characterized in that, specifically comprises the following steps:

[0029] (1) Extraction: Add the dried roselle calyx and receptacle to distilled water with a mass-volume ratio of 1:15, and conduct countercurrent extraction in a constant-temperature water bath at 60 °C for 3 times, each time for 1 hour, combine the extracts and centrifuge, and collect the supernatant;

[0030] (2) Resin adsorption of pigments: Take an appropriate amount of macroporous resin, soak it in distilled water first, wash it with distilled water until the liquid is clear, then soak it in 95% ethanol for 4 hours, wash it with distilled water until it is not turbid, pour it into a 1×100 cm adsorption column , put the supernatant on the column for adsorption operation, and collect the effluent a after the pigment is adsorbed;

[0031] (3) Preparation of roselle pigment: first wash the adsorption colum...

Embodiment 2

[0043] A method for recovering organic acid from waste liquid after extracting pigment from roselle, is characterized in that, specifically comprises the following steps:

[0044] (1) Extraction: Add the dried roselle calyx and receptacle to distilled water with a mass-volume ratio of 1:18, extract in a constant-temperature water bath at 60 °C for 3 times, 1.5 h each time, centrifuge the combined extracts, and collect the supernatant;

[0045] (2) Resin adsorption of pigments: Take an appropriate amount of macroporous resin, soak it in distilled water first, wash it with distilled water until the liquid is clear, then soak it in 95% ethanol for 4 hours, wash it with distilled water until it is not turbid, pour it into a 1×100 cm adsorption column , put the supernatant on the column for adsorption operation, and collect the effluent a after the pigment is adsorbed;

[0046] (3) Preparation of roselle pigment: first wash the adsorption column in step (2) with 3 times column volu...

Embodiment 3

[0058] A method for recovering organic acid from waste liquid after extracting pigment from roselle, is characterized in that, specifically comprises the following steps:

[0059] (1) Extraction: Add the dried roselle calyx and receptacle to distilled water with a mass-volume ratio of 1:20, and conduct countercurrent extraction in a constant temperature water bath at 60 °C for 3 times, 1 hour each time, combine the extracts and centrifuge, and collect the supernatant;

[0060] (2) Resin adsorption of pigments: Take an appropriate amount of macroporous resin, soak it in distilled water first, wash it with distilled water until the liquid is clear, then soak it in 95% ethanol for 4 hours, wash it with distilled water until it is not turbid, pour it into a 1×100 cm adsorption column , put the supernatant on the column for adsorption operation, and collect the effluent a after the pigment is adsorbed;

[0061] (3) Preparation of roselle pigment: first wash the adsorption column in...

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PUM

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Abstract

The invention discloses a method for recovering organic acid from waste liquid produced after pigment is extracted from roselle. The method is characterized by specifically including the following steps of firstly, conducting extracting; secondly, adsorbing pigment through resin; thirdly, preparing roselle pigment; fourthly, adsorbing organic acid through resin; fifthly, conducting elution; sixthly, converting organic acid sodium salt into organic acid; seventhly, preparing roselle organic acid. Pigment and organic acid are extracted from calyx and receptacle of roselle by means of tap water through the roselle organic acid separation and purification technology; pigment is adsorbed through macroporous resin, organic acid is adsorbed and recovered through ion exchange resin from waste liquid where roselle red pigment is completely separated and extracted, organic acid can be used as food citric acid, and the added value of pigment products of calyx and receptacle of roselle is improved.

Description

technical field [0001] The invention belongs to the technical field of food additive production, and in particular relates to a method for recovering organic acids from waste liquid after extracting pigment from roselle, in particular, using ion exchange resin to recover organic acids from the waste liquid from which roselle red pigment has been separated and extracted. Acid to increase the added value of roselle calyx and receptacle pigment products. Background technique [0002] Roselle ( Hibiscus Sabdariffa Linn) is an annual herbaceous plant or perennial shrub of the genus Hibiscus in the Malvaceae family, widely used in Africa to treat diseases of the heart and nerves. Roselle calyx and receptacle contain a large amount of organic acids, the content is as high as 15% to 30%, mainly including oxalic acid, tartaric acid, malic acid, succinic acid, citric acid, malonic acid, etc. (Li Shengfeng, Liu Xueming, Zhu Zhiwei, Huang Ruqiang, Wu Jijun, Chen Zhiyi. Development and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B61/00C09B67/54A23L27/10
Inventor 展亚莉展康华李进超周红刘晓波
Owner QINGDAO PENGYUAN KANGHUA NATURAL PROD