Method for continuously producing lactate by utilizing heavy phase lactic acid

A technology of heavy-phase lactic acid and lactate, applied in the preparation of carboxylate, organic chemistry, etc., can solve the problems of small dosage, difficult to sell, narrow use of heavy-phase lactic acid, etc., and achieves the effect of solving constraints and rational utilization of resources.

Active Publication Date: 2012-10-03
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

[0003] The use of heavy phase lactic acid is narrow, and the dosage is small, so it is difficult to sell in the market
Even if traditional methods are used to reprocess the heavy phase lactic acid to produce lactic acid, there will still be 5-8% of the lactic acid in the heavy phase lactic acid that cannot be extracted and utilized; moreover, the cost of reprocessing the heavy phase lactic acid to produce lactic acid is higher than that of lactic acid The sales price is not worth the loss
This also indirectly causes the price of refined lactic acid to be expensive, and at the same time restricts the production scale of refined lactic acid

Method used

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  • Method for continuously producing lactate by utilizing heavy phase lactic acid
  • Method for continuously producing lactate by utilizing heavy phase lactic acid
  • Method for continuously producing lactate by utilizing heavy phase lactic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this embodiment, the method for continuously producing lactate using heavy-phase lactic acid comprises the following steps:

[0030] (a) Dilution: Dilute the heavy phase lactic acid to a mass fraction of lactic acid of 20%;

[0031] (b) Carbon column decolorization: the carbon column is filled with granular carbon, and the heavy phase lactic acid to be extracted is obtained after decolorization of the carbon column;

[0032] (c) Extraction: The organic extraction phase is composed of an extractant, a solvent and a phase regulator. The extractant is an amide compound, the solvent is liquid paraffin, and the phase regulator is an alcohol compound. Amide compound has the structure shown in following formula (I):

[0033]

[0034] where R1 is CH 3 (CH 2 ) 3 -, R2 is hydrogen, R3 is CH 3 (CH 2 ) 3 -.

[0035] Alcohol compound has the structure shown in following formula (II):

[0036]

[0037] Wherein R4 is hydrogen, R5 is hydrogen, R6 is CH 3 CH 2 -.

...

Embodiment 2

[0046] The difference between this example and Example 1 is: in step (a), dilute the heavy phase lactic acid to a mass fraction of lactic acid of 30%; in step (c): the mass ratio of the extractant, solvent and phase regulator 6.5:3.5:1. The extraction agent is an amide compound, the solvent is liquid paraffin, and the phase regulator is an alcohol compound.

[0047] Amide compound has the structure shown in following formula (I):

[0048]

[0049] where R1 is (CH 2 ) 5 CH-, R2 is hydrogen, R3 is CH 3 (CH 2 ) 7 -.

[0050] Alcohol compound has the structure shown in following formula (II):

[0051]

[0052] Wherein R4 is hydrogen, R5 is hydrogen, R6 is CH 3 (CH 2 ) 5 -.

[0053] The organic extract phase and the heavy phase lactic acid to be extracted are fully mixed according to the mass ratio of 1.5:1, the extraction operating temperature is 33°C, the phases are separated and the phase equilibrium time is 36min; the mass fraction of lactic acid in the water pha...

Embodiment 3

[0057] The difference between this example and example 1 is: in step (a), dilute the heavy phase lactic acid to a mass fraction of lactic acid of 25%; in step (c): the mass ratio of the extractant, solvent and phase regulator 6:3:0.8. The extraction agent is an amide compound, the solvent is liquid paraffin, and the phase regulator is an alcohol compound.

[0058] Amide compound has the structure shown in following formula (I):

[0059]

[0060] where R1 is CH 3 (CH 2 ) 9 -, R2 is hydrogen, R3 is CH 3 (CH 2 ) 6 -.

[0061] Alcohol compound has the structure shown in following formula (II):

[0062]

[0063] Wherein R4 is hydrogen, R5 is hydrogen, R6 is CH 3 CH 2 -.

[0064] The organic extraction phase and the heavy phase lactic acid to be extracted are fully mixed according to the mass ratio of 1.3:1, the extraction operation temperature is 33°C, the phases are separated and the phase equilibrium time is 50min; the mass fraction of lactic acid in the aqueous ...

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Abstract

The invention discloses a method for continuously producing lactate by utilizing heavy phase lactic acid. The method comprises the steps as follows: (a) dilution is carried out; (b) carbon column decolorization is carried out; (c) in the extraction step, an organic extraction phase comprises extracting agents, a solvent and phase conditioning agents, the extracting agents are amide compounds or a mixture of the amide compounds, the solvent adopts liquid paraffin, the phase conditioning agents adopt alcohol compounds or the mixture of the alcohol compounds, and the mass ratio of the extracting agents, the solvent and the phase conditioning agents is (5.5 to 6.5):(2.5 to 3.5):(0.5 to 1); and the mass ratio of the organic extraction phase and heavy phase lactic acid to be extracted is (1.1 to 1.5):1, and the operating temperature for extraction ranges from 20 to 70 DEG C; (d) back extraction is carried out; (e) fine filtration is performed; and (f) concentration is performed. Lactic acid is selectively transferred to the organic extraction phase to form a loaded organic phase, and lactate aqueous solution is obtained after back extraction so as to prepare lactate, so that impurities and lactic acid in the heavy phase lactic acid can be separated effectively, the process route is simple, and the manufacturing cost is low.

Description

technical field [0001] The present invention relates to an organic extraction phase used in extraction, and in particular to a method for the continuous production of lactate using heavy phase lactic acid. Background technique [0002] As a food additive and chemical raw material, lactic acid is widely used in more and more fields, especially the market gap for refined lactic acid is large (for example, the production of lactic acid salts, esters and polylactic acid requires refined lactic acid as raw material). However, during the refining process of lactic acid, heavy phase lactic acid with 15% of the total mass of raw materials will be produced (heavy phase lactic acid: it is ordinary lactic acid. During the refining process, a part of lactic acid is distilled out, which is called refined lactic acid; while the residual lactic acid and the original lactic acid Sugar, pigment, protein, etc. are called heavy phase lactic acid, also called black lactic acid; because it can o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C59/08C07C51/41
Inventor 石从亮张国宣王敏郭廷马凯歌王国民曹自立顾永华杨清翔寇宇张树银王浩陈发民李艳坤
Owner 河南金丹乳酸科技股份有限公司
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