Technology for recycling raw materials from gulonic acid mother liquor
A kind of gulonic acid and process technology, which is applied in the field of bipolar membrane electrodialysis coupled with high-pressure nanofiltration membrane purification process, can solve the problems of large consumption of acid and alkali and washing water, complicated operation, repeated regeneration of ion exchange resin, etc. the effect of reducing environmental pollution
Inactive Publication Date: 2018-11-09
SUZHOU CHENGJIANG ENVIRONMENTAL TECH CO LTD
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[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.
[0030] figure 1 It is a process flow diagram of recovering raw materials in a guaronic acid mother liquor provided by the invention.
[0031] A process for recovering raw materials from gulonic acid mother liquor, such as figure 1 As shown, the raw materials in this example include gulonic acid and VC, and the specific process method includes the following steps: (1) initial feed liquid pretreatment: the initial feed liquid composition is shown in Table 1, and the initial feed liquid containing gulonic acid mother liquor is collected and sieved Filter out the residue, adjust the pH to 4-7 with NaOH solution, remove impurities by activated carbon and TMF, and obtain a purified feed liquid. After pretreatment, the removal rate of ash and impurities is 80%;
[0032] (2) Purification of purified f...
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Abstract
The invention relates to the technical field of membrane purification technology and particularly relates to a technology for recycling raw materials from gulonic acid mother liquor. The technology isperformed in a bipolar membrane electrodialysis device and specifically comprises the following steps: (1) pretreatment of gulonic acid mother liquor: collecting the gulonic acid mother liquor and sieving to filter out residue, regulating the pH to 4-7, and removing impurities with activated carbon and TMF to obtain purified feed liquid; (2) separating protein of the purified feed liquid by the bipolar membrane electrodialysis device, to obtain refined feed liquid; (3) separating the purified feed liquid containing oxalic acid, gulonic acid and VC by a high-pressure nanofiltration membrane, wherein the oxalic acid is discharged at a water producing end by the high-pressure nanofiltration membrane, and the gulonic acid and VC are intercepted on the high-pressure nanofiltration membrane, toobtain concentrated gulonic acid and VC solution. According to the technology provided by the invention, in the bipolar membrane electrodialysis process, the total effective content of gulonic acid and VC in the gulonic acid mother liquor is increased from 23.86% to 36.5%, and the impurity removal rate reaches 90%.
Description
technical field [0001] The invention relates to the technical field of bipolar membrane electrodialysis coupling high-pressure nanofiltration membrane purification technology, in particular to a technology for recovering raw materials from gulong acid mother liquor. Background technique [0002] The downstream treatment process of traditional organic acid fermentation production is mostly acidification precipitation method. Because the fermentation process of many organic acids first obtains organic acid salts, and then further converts them into corresponding organic acids. The acidification precipitation method generally uses sulfuric acid to acidify organic acid salts to generate sulfates and corresponding organic acids. This production process includes acid hydrolysis, precipitation, filtration and other processes, which not only need to consume a large amount of sulfuric acid, but also the process is complicated, the production labor intensity is high, a large amount o...
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IPC IPC(8): C07C59/105C07C51/42C07D307/33
CPCC07C51/42C07D307/33C07C59/105
Inventor 杨锁利嵇华俊
Owner SUZHOU CHENGJIANG ENVIRONMENTAL TECH CO LTD