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Method for producing L sodium lactate

A production method, a technology for sodium lactate, applied in the directions of microorganism-based methods, biochemical equipment and methods, chemical instruments and methods, etc., can solve the problems of toxic by-products, many steps, etc.

Inactive Publication Date: 2016-01-06
马鞍山中粮生物化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of toxic by-products and many steps in the traditional treatment process, and provide a production method of L-sodium lactate that is easy to operate, low in cost, simple in steps, and free of by-products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Dissolve sodium carbonate in water and stir well;

[0021] (2) Slowly add sodium carbonate solution into lactic acid to adjust the Ph value to 6.8-7;

[0022] (3) Heat the mixed solution to 100°C and keep it for 30Min-40Min;

[0023] (4) Add activated carbon to the standing solution, continue to stand for 20 minutes and then filter;

[0024] (5) Heat the filtrate to evaporate to saturation, then slowly cool down to 25°C to crystallize;

[0025] (6) Recrystallize the crystallized crystal;

[0026] The lactic acid is produced by the following method,

[0027] 1) After hydrolyzing and saccharifying wheat starch and corn starch, adding Rhizopus oryzae to ferment;

[0028] 2) coarsely filter the fermented liquid;

[0029] 3) Add the cation exchange resin to the fermented broth that has been finely filtered.

[0030] Example 1 was not filtered through a fiber membrane, and the finished product finally had a small amount of impurities.

Embodiment 2

[0032] (1) Dissolve sodium carbonate in water and stir well;

[0033] (2) Slowly add sodium carbonate solution into lactic acid to adjust the Ph value to 6.8-7;

[0034] (3) Heat the mixed solution to 100°C and keep it for 30Min-40Min;

[0035] (4) Heat the filtrate to evaporate to saturation, then slowly cool down to 25°C to crystallize;

[0036] (5) Recrystallize the crystallized crystal;

[0037] The lactic acid is produced by the following method,

[0038] 1) After hydrolyzing and saccharifying wheat starch and corn starch, adding Rhizopus oryzae to ferment;

[0039] 2) coarsely filter the fermented liquid;

[0040] 3) finely filter the fermented liquid through a hollow fiber membrane;

[0041] 4) Add the cation exchange resin to the finely filtered fermented broth.

[0042] In the above-mentioned Example 2, the activated carbon was not filtered, and the finally obtained crystals turned yellow.

Embodiment 3

[0044] (1) Dissolve sodium carbonate in water and stir well;

[0045] (2) Slowly add sodium carbonate solution into lactic acid to adjust the Ph value to 6.8-7;

[0046] (3) Heat the mixed solution to 100°C and keep it for 30Min-40Min;

[0047] (4) Add activated carbon to the standing solution, continue to stand for 20 minutes and then filter;

[0048] (5) Heat the filtrate to evaporate to saturation, then slowly cool down to 25°C to crystallize;

[0049] (6) Recrystallize the crystallized crystal;

[0050] The lactic acid is produced by the following method,

[0051] 1) After hydrolyzing and saccharifying wheat starch and corn starch, adding Rhizopus oryzae to ferment;

[0052] 2) coarsely filter the fermented liquid;

[0053] 3) finely filter the fermented liquid through a hollow fiber membrane;

[0054] No ion exchange resin was used in Example 3, and impurities such as iron ions existed in the finally obtained crystals.

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Abstract

The invention discloses a method for producing L sodium lactate. The method comprises the following steps: dissolving sodium carbonate into water, and uniformly stirring sodium carbonate; slowly adding the sodium carbonate solution into lactic acid, and adjusting the pH value of the mixed solution to 6.8-7; heating the mixed solution to the temperature of 100 DEG C, and maintaining the temperature for 30-40 minutes; adding activated carbon into the standing solution, continuing to carry out standing for 20 minutes, and then, filtrating the solution; heating the filtrate so as to evaporate the filtrate until the filtrate is saturated, and then, slowly cooling the saturated filtrate to the temperature of 25 DEG C for crystallization; and recrystallizing crystallized crystals. L sodium lactate prepared by the method is high in utilization ratio and high in conversion ratio, the operation is easy, the cost is low, the steps are simple, and the method is environment-friendly and pollution-free.

Description

technical field [0001] The invention relates to a production method of L-sodium lactate. Background technique [0002] Sodium L lactate is widely used and can be used as medicine to relieve acidosis caused by diarrhea, dehydration, diabetes, nephritis and other diseases. It is also used as seasoning, plasticizer of casein plastic, antifreeze, humectant, substitute of glycerin, corrosion inhibitor of alcohol antifreeze. There are many kinds of production of L-sodium lactate, including chemical synthesis and fermentation. At present, in most cases, the calcium lactate produced by fermentation reacts with strong alkali, but there are many steps in the production of calcium lactate, and there will be by-products at the same time. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of toxic by-products and many steps in the traditional treatment process, and provide a kind of production method of L-sodium lactate that is eas...

Claims

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Application Information

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IPC IPC(8): C07C51/41C07C59/08C12P7/56C12R1/845
CPCC07C51/412C12P7/56C07C59/08
Inventor 唐宏泉
Owner 马鞍山中粮生物化学有限公司
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