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Preparation method of neutralizing agent for fermentation production of lactic acid

A lactic acid and solution technology, applied in fermentation, calcium/strontium/barium oxide/hydroxide, etc., can solve the problems of large fluctuation time of pH fluctuation and temporary high pH

Active Publication Date: 2021-04-30
河南金丹乳酸科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with calcium carbonate, calcium hydroxide adjusts the pH of the fermentation feed liquid faster, but in actual production, there are also disadvantages in the actual production that the partial temporary pH of the fermentation feed liquid is too high, the pH fluctuates greatly during the adjustment period, and the fluctuation time during the adjustment is longer.

Method used

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  • Preparation method of neutralizing agent for fermentation production of lactic acid

Examples

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Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method for a neutralizing agent for producing lactic acid by fermentation, comprising the steps of:

[0023] (1) Add 10kg of tert-butyldimethylsilyl chloride powder into 100kg of ethyl acetate, stir for 2 hours to obtain solution A;

[0024] (2) Add 50 kg of polydimethylsiloxane to the solution A obtained in step (1), and stir for 1 hour to obtain solution B;

[0025] (3) adding 32 kg of calcium oxide powder with a particle size of 100-200 mesh into the solution B obtained in step (2), stirring for 48 hours, and performing hydrophobic modification on the surface of calcium oxide;

[0026] (4) Filtrate to obtain surface hydrophobic modified calcium oxide, wash with ethyl acetate for 3-5 times, and vacuum dry at 100°C for 15 hours to obtain a neutralizer for fermented lactic acid production.

Embodiment 2

[0028] The preparation method of the neutralizing agent for fermentation production of lactic acid in this embodiment comprises the following steps:

[0029] (1) Add 10kg of tert-butyldimethylsilyl chloride powder into 100kg of ethyl acetate, stir for 2 hours to obtain solution A;

[0030] (2) Add 50 kg of polydimethylsiloxane to the solution A obtained in step (1), and stir for 1 hour to obtain solution B;

[0031] (3) 32kg, particle size is that 100-200 mesh calcium oxide powder joins in the solution B that step (2) obtains, stirs for 48 hours, in the stirring process, uniform dropwise drips saturated tyramine ethanol solution (tyramine is added to anhydrous In ethanol, stir until tyramine no longer dissolves and obtain saturated tyramine ethanol solution), the dripping amount of saturated tyramine ethanol solution is 22kg, and carry out calcium oxide surface hydrophobic modification;

[0032] (4) Filtrate to obtain surface-hydrophobic modified calcium oxide, wash with ethy...

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Abstract

The invention discloses a preparation method of a neutralizing agent for fermentative production of lactic acid, which comprises the following steps: (1) adding tert-butyldimethylsilyl chloride powder into ethyl acetate and stirring to obtain solution A; (2) adding to the step ( 1) Add polydimethylsiloxane to the obtained solution A, stir to obtain solution B; (3) add calcium oxide powder to the solution B obtained in step (2), stir, and carry out hydrophobic modification of the calcium oxide surface (4) Filtrate to obtain surface hydrophobic modified calcium oxide, and obtain a neutralizer for fermented lactic acid production after vacuum drying. When the prepared neutralizer for fermentation and production of lactic acid is used to adjust the pH of the fermentation feed liquid, the local pH of the fermentation feed liquid will not be too high, the pH fluctuation during the adjustment period is small, and the fluctuation time during the adjustment is short.

Description

technical field [0001] The invention relates to the technical field of fermentation production of lactic acid. Specifically, it relates to a preparation method of a neutralizing agent for fermenting and producing lactic acid. Background technique [0002] In the process of fermenting and producing lactic acid, alkali needs to be added as a neutralizing agent to adjust the pH of the fermentation feed liquid. Commonly used neutralizers include ammonia water, sodium hydroxide, calcium hydroxide and calcium carbonate. The price of ammonia water and sodium hydroxide is relatively high, and in industrial production, it is usually adjusted by dynamic addition according to the actual pH feedback results of the fermentation broth. The pH of the fermentation feed. Due to the strong alkalinity of ammonia water and sodium hydroxide, when added, it will cause local temporary pH to be too high, inhibit the reproduction of lactic acid bacteria or cause the death of lactic acid bacteria, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/56C01F11/02
CPCC01F11/02C12P7/56
Inventor 王浩崔耀军申建张树银顾永华葛大森姜建友唐小玲张美霞李艳坤付晶晶刘雁楚慧灵
Owner 河南金丹乳酸科技股份有限公司