Decoloring membrane separation process for sodium lactate

A sodium lactate and membrane separation technology, which is applied in the field of sodium lactate decolorization and membrane separation technology, can solve the problems of sodium lactate concentration decrease, long reaction time, increased production cost, etc., and achieve the effects of reduced processing steps, simple overall process and low production cost

Pending Publication Date: 2021-10-22
HEFEI XINDA MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some problems in these two methods: because activated carbon cannot be reused, it needs to be replaced after one use, thus increasing the production cost and increasing the labor cost input. In addition, because activated carbon is a physical adsorption process, in While removing the activated carbon by filtration, some sodium lac

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The invention provides a technical solution: a sodium lactate decolorization membrane separation process, specifically comprising the following steps:

[0020] S1, pretreating the sodium lactate raw material to obtain a certain concentration of sodium lactate solution;

[0021] S2, the sodium lactate solution is subjected to decolorization membrane fine filtration treatment;

[0022] S3. Packaging the refined filtrate obtained in step S2.

[0023] The pretreatment in step S1 specifically includes the following steps: pour the sodium lactate raw material into a circulation tank, stir with a stirrer, and add an appropriate amount of water to adjust the concentration of the sodium lactate solution to 20%.

[0024] The chromaticity of the sodium lactate solution obtained after the pretreatment in the step S1 is 200APHA.

[0025] The stirring time of the stirrer is 30min, and the stirring speed is 100r / min.

[0026] The decolorization membrane fine filtration treatment in...

Embodiment 2

[0031] The difference from Example 1 is that the concentration of the sodium lactate solution obtained after the pretreatment in step S1 is 30%;

[0032] The stirring time of the stirrer is 40min, and the stirring rate is 80r / min;

[0033] The molecular weight of the decolorizing film is 500Dal;

[0034] The decolorization membrane fine filtration treatment temperature in the step S2 is 30° C., and the pressure is 20 bar.

Embodiment 3

[0036] The difference with Embodiment 1 is:

[0037] The concentration of the sodium lactate solution obtained after pretreatment in the step S1 is 40%;

[0038] The stirring time of the stirrer is 50min, and the stirring speed is 60r / min;

[0039] The molecular weight of the decolorizing film is 150Dal;

[0040] The decolorization membrane fine filtration treatment temperature in the step S2 is 50° C., and the pressure is 30 bar.

[0041] The chromaticity result of the fine filtrate of sodium lactate after the treatment of embodiment one-three is shown in the table below:

[0042] Embodiment one Embodiment two Embodiment Three Chroma / APHA 10 14 20

[0043] It can be seen that after the sodium lactate solution with a chromaticity of 200APHA is finely filtered by the decolorizing membrane system, the chromaticity of the fine filtrate is generally maintained in the range of 10-20APHA, and a good decolorizing effect is achieved.

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Abstract

The invention belongs to the technical field of sodium lactate production, and particularly discloses a decoloring membrane separation process for sodium lactate. The process specifically comprises the following steps: S1, pretreating a sodium lactate raw material to obtain a sodium lactate solution with a certain concentration; S2, performing decoloring membrane fine filtration treatment on the sodium lactate solution; and S3, packaging a fine filtrate obtained in the step S2. According to the invention, a nanofiltration membrane is directly applied to the decoloration treatment of sodium lactate, so the treatment steps of existing processes are reduced, the whole process is simple and convenient, production line transformation cost is low, and better decoloration effect can be ensured; and compared with existing activated carbon adsorption and illumination treatment methods, the process of the invention has the advantages that production efficiency is higher and production cost is lower.

Description

technical field [0001] The invention relates to the technical field of sodium lactate production, in particular to a sodium lactate decolorization membrane separation process. Background technique [0002] Sodium lactate is a chemical substance with the molecular formula C 3 h 5 o 3 Na. Molecular weight 112.06, colorless or almost colorless transparent liquid. At present, sodium lactate is produced by the reaction of lactic acid with sodium hydroxide or sodium carbonate in the industry. In order to achieve the purpose of reducing costs and simplifying the process, high-concentration lactic acid is generally used to react with sodium hydroxide, but the color of the generated sodium lactate often becomes dark yellow, which seriously affects the color of sodium lactate. As a food additive, sodium lactate solution needs to strictly control the chromaticity of its product to ensure product quality and meet national standards. For this reason, the product needs to be decolori...

Claims

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Application Information

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IPC IPC(8): C07C59/08C07C51/42C07C51/47
CPCC07C51/42C07C51/47C07C59/08
Inventor 陈传云李爱珍张庆李胜明
Owner HEFEI XINDA MEMBRANE TECH
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