CN102086149A

CN102086149A - Novel method for extracting sodium gluconate

Info

Publication number: CN102086149A
Application number: CN2009102315433A
Authority: CN
Inventors: 王勇; 王亮; 王一; 马仕敏; 由秀厚
Original assignee: XIWANG GROUP CO Ltd
Current assignee: XIWANG GROUP CO Ltd
Priority date: 2009-12-04
Filing date: 2009-12-04
Publication date: 2011-06-08

Abstract

The invention belongs to a preparation process of sodium gluconate and in particular relates to a novel method for extracting the sodium gluconate. The preparation process comprises the following concrete steps of: filtering and decoloring a sodium gluconate fermentation liquor; then concentrating the sodium gluconate fermentation liquor to 40-60% of the original concentration; adding an ethanol solution to the sodium gluconate fermentation liquor and stirring for 3-8h; crystallizing, sedimenting and separating; evaporating a separated clear solution; extracting ethanol; recycling raffinate into the fermentation liquor; and drying a crystal to prepare a sodium gluconate solid. By adopting the novel method for extracting the sodium gluconate, the crystallization yield of the sodium gluconate can be improved; the production cost of the sodium gluconate is lowered; a large amount of energy resources is saved; the occurrence of side reaction is reduced; the product has high purity; no wastewater is discharged in the whole production course; and a cycle process is utilized.

Description

The novel method that a kind of Sunmorl N 60S extracts

Technical field:

The invention belongs to the preparation technology of Sunmorl N 60S, relate to the novel method that a kind of Sunmorl N 60S extracts specifically.

Background technology:

Sunmorl N 60S claims sodium pentahydyoxycaproate again, be a kind of white or light yellow crystalline powder, it is the extremely wide organic acid salt of multihydroxyl of a kind of purposes, because it is nontoxic, raw material sources are extensive, are mainly used in water quality stabilizer, steel surface clean-out system, vial scavenger specially, cement additive etc. in industrial aspect; Can make laxative aspect medical, keep human acid-base balance's PH to adjust; In food service industry and since itself to be flavor property good, can cover bitter taste and stink, improvement is flavor property effect and can be used as and be the flavor activator; Because it can prevent the generation of low sodium syndromes effectively, so can also be as foodstuff additive.

There is following problem in extraction process (shown in Figure 1 as Figure of description) with the fermentative Production Sunmorl N 60S at present: along with mother liquor returns the increase of joining number of times, the color burn of mother liquor influences finished color; Along with mother liquor returns the increase of joining number of times, the residual sugar in the mother liquor and the increase of impurity influence the purity of product; The price that mother liquor is sold is very low; The crystallization yield of Sunmorl N 60S is not high, less than 90%; In crystallization more than 65 ℃, because long-time high temperature causes the mother liquor color dark excessively, thereby increase activated carbon decolorizing difficulty, increase activated carbon dosage, increased the Sunmorl N 60S production cost.

Summary of the invention:

In order to solve the deficiencies in the prior art, the invention provides the novel method that a kind of Sunmorl N 60S extracts, can effectively improve the Sunmorl N 60S extract yield, improve the purity and the color and luster of Sunmorl N 60S.

In order to solve the problems of the technologies described above, the method that the present invention takes is: the novel method that a kind of Sunmorl N 60S extracts, and it is characterized in that: described novel method concrete operations are divided into following a few step:

(1), the Sunmorl N 60S fermented liquid is filtered, decolours.

(2), the fermented liquid after will filtering is concentrated into the 40-60% of original content.

(3), get ethanolic soln, slowly add in the Sunmorl N 60S concentrated solution by 1: 6 volume ratio, under 50 ℃-60 ℃, carried out stirred crystallization 3-8 hour, under natural temperature, continue crystallization 2-4 hour then.

(4), the fermented liquid that stirs was carried out sedimentation 4-6 hour, separate.

(5), the clear liquid after separating is evaporated, extract and reclaim ethanol, and raffinate returned to be fitted in the fermention medium ferment.

(6), isolated crystal under 75 ℃, carried out drying 1 hour, to water content below 0.5%, make the Sunmorl N 60S solid.

Ethanol in described step (3), its concentration are 80%-95%, and described natural temperature scope is at 20 ℃-40 ℃.

Beneficial effect of the present invention is: improve the Sunmorl N 60S crystallization yield, reduced the Sunmorl N 60S production cost; Change the natural temperature crystallization into by 65 ℃ of crystallizations, save a large amount of energy, reduce the generation of side reaction; Crystallization under the natural temperature can not cause color can not influence the color and luster of product deeply yet; Mother liquor does not need back to join, so its finished product purity height; Whole process of production does not have waste water and gets rid of the employing circulation technology.

Description of drawings

Fig. 1 is the background technology process flow sheet;

Fig. 2 is a process flow sheet of the present invention.

Embodiment:

Embodiment

1, get feed liquid 5000ml after the Sunmorl N 60S filtering fermentation liquor decolouring, under 25 ℃ of conditions, the aqueous solution proportion of measuring Sunmorl N 60S is 1.13, and the content 31.2g/dl of Sunmorl N 60S.

2, under 65 ℃ of conditions, feed liquid is concentrated into the 55%-60% of original content.

3, the ethanolic soln that slowly adds 80%-95% under 30 ℃ of conditions evenly stirs, and crystal to be had stops to add ethanolic soln when separating out.

4, under 30 ℃ of conditions, separating glucose acid sodium crystal is carried out in crystallization after 8 hours

5, the clear liquid after separating evaporates recovery ethanol, and its raffinate returns to be allotted in the ferment substratum, and its crystal can go drying, wherein measures in the crystal moisturely 2%, and quality is 1560g.

Below be the calculating of present method Sunmorl N 60S extract yield:

The Sunmorl N 60S quality is 5000 * 31.2%=1560g in the fermented liquid.

The Sunmorl N 60S quality is 1560 * 98%=1528.8g in the drying solid.

The broth extraction yield is: 1528.8g/1560g=98%.

Extracting the difference of the extraction yield of Sunmorl N 60S in order to contrast novel method and prior art, below is to adopt prior art to extract the method for Sunmorl N 60S and the calculating of extraction yield:

1, get feed liquid 5000ml after the Sunmorl N 60S filtering fermentation liquor decolouring, the aqueous solution proportion of measuring Sunmorl N 60S under 25 ℃ of conditions is 1.13, and the gluconic acid sodium content is 31.2g/dl.

2, under 65 ℃ of conditions, feed liquid is concentrated into original content 60%.

3, continue to concentrate under 65 ℃ of conditions, crystal to be had is separated out, and continues to keep crystallization under 65 ℃ of situations.

4, crystallization separated after 3 hours.

5, separate its crystal of back and can go drying, wherein crystal is moisture 2%, and quality is 1429.5.

Sunmorl N 60S broth extraction yield calculates:

The Sunmorl N 60S quality is in the mother liquor: 5000 * 31.2%=1560g

The Sunmorl N 60S quality is in the drying solid: 1429.46 * 98%=1400.88g

The mother liquor extract yield is: 1400.88g/1560g=89.8%

The new aging method yield purity of table 1. relatively

?	Present method	Aging method
			Raw material	1560g	1560g
Yield	98％	89.9％
			Outward appearance	Pure white, shinny	Little Huang, obfuscation

Claims

1. the novel method extracted of a Sunmorl N 60S, it is characterized in that: described novel method concrete operations are divided into following a few step:

(1), with Sunmorl N 60S filtering fermentation liquor, decolouring.

(2), the fermented liquid after will filtering is concentrated into the 40%-60% of original content.

(4), the fermented liquid that stirs was carried out sedimentation 4-6 hour, separate then.

2. the novel method that Sunmorl N 60S according to claim 1 extracts, it is characterized in that: the ethanol in the described step (3), its concentration are 80%-95%.

3. the novel method that Sunmorl N 60S according to claim 1 extracts, it is characterized in that: described natural temperature scope is at 20 ℃-40 ℃.