JPS63225332A - Solid lactate and production thereof - Google Patents

Abstract

NEW MATERIAL:A solid lactate shown by the formula (M is M, Na or NH4; m is in 2.4<=m<=5 when M is K or NH4; n is 0-5). EXAMPLE:Sodium calcium lactate double salt. USE:The titled lactate is added to foods, cosmetics and industrial chemicals and used. The lactate has low water absorption properties, is in solid, powdery or flaky state to be made into powder, readily blended with another powdery product and is extremely effective. The amount of sodium salt, potassium salt and ammonium salt can be changed and lactate double salt in a powdery state corresponding to purpose of use can be obtained. PREPARATION:1mol. calcium lactate is reacted with (i) sodium lactate in an amount of 2.4mol.<m<=5mol. or (ii) potassium lactate or ammonium lactate in an amount of 0mol.<m<=5mol. to give a compound shown by formula I.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to solid lactate and a method for producing the same. Specifically, the present invention relates to a solid lactate obtained by combining calcium lactate with a lactate such as sodium lactate, potassium lactate, or ammonium lactate, and a method for producing the same.

(Prior art) In recent years, sodium lactate, potassium lactate, and ammonium lactate have been increasingly used in foods, cosmetics, industrial chemicals, etc. However, since they are all usually aqueous solutions, their uses are limited. , it has been desired to powderize these lactate salts. That is, among lactate salts, sodium lactate, potassium lactate, and ammonium lactate generally have strong hygroscopicity, and therefore it has been extremely difficult to crystallize or powderize them.

The following has been known so far regarding the crystallization or powderization of lactate salts. That is, a method of obtaining powdered lactic acid by mixing calcium lactate and an aqueous solution of lactic acid (Japanese Patent Publication No. 44-16.358 and Japanese Patent Publication No. 6
0-6.342), a powdered lactate obtained from a lactate other than calcium and an aqueous lactic acid solution [JP-A-60-84.
No. 244 (lithium salt), JP-A-60-84.245 (magnesium salt) and JP-A-60-109, 51!
There are No. 3 (iron salt), etc.

(Problems to be Solved by the Invention) However, nothing has been known about the crystallization or powderization of lactate in the form of an aqueous solution.

Therefore, it is an object of the present invention to provide a novel solid (powdered or powderizable flake) lactate salt and a method for producing the same. The object of the present invention is to provide a powdered or powderable lactate salt that can be easily blended, and a method for producing the same.

(Means for Solving the Problems) The above objectives are achieved by solving the general formula I OHOH [CH3CHCOO]2 Ca-m[OH3CHCOO
H] ・nH2O(I > (wherein, M is Na
, K or NH4, m is 0 when M is K or NH4
<m≦5, and when M is Na, 2.4<m≦5,
Further, this can be achieved with a powdered or powderable lactate represented by n=0≦n≦5.

In addition, for the above purposes, for 1 mole of calcium lactate (
a) 2.4 mol x 55 mol sodium lactate or (b
) Potassium lactate or ammonium lactate 0 mol m55
General formula I OHOH[CH3CHCOO]2CaIm[OH3CH
COOH] ・nH20 (Ding) (However, in the formula, M
is Na, K or NH4, m is 0<m≦5 when M is K or NH4, 2.4<m≦5 when M is Na, and n is O≦n≦5 ) is achieved by the method for producing powdered lactate.

(Function) The solid lactate according to the present invention has the general formula I OHOH [CH3CHCOO]2 ca * ffl[OH
It is a complex salt represented by 3CHCOOHco-nH2O(I), where M&;tNalK or NH4, m is M
When is K or NH4, Q<m≦5, preferably 1≦
m≦4, and when M is Na, 2.4<m≦5, preferably 2.5≦m≦4, and n is O≦n≦5, preferably O≦n≦4.

The lactate represented by the general formula 1 is calcium lactate 1
(a) Sodium lactate 2゜4 mole m55
moles, preferably 2.5 moles≦m≦4 moles or (b)
It is obtained by reacting potassium lactate or ammonium lactate in O mol≦m≦5 mol, preferably 1 mol≦m≦4 mol.

That is, when m exceeds 5 moles, the hygroscopicity of the resulting composite salt increases rapidly. The reaction is usually carried out in an aqueous medium, for example by adding calcium lactate to an aqueous solution of sodium lactate, potassium lactate or ammonium lactate;
1-6 at a temperature of 0-100°C, preferably 20-70°C
The reaction mixture is heated and stirred for 0 minutes, preferably 10 to 30 minutes, and the resulting reaction mixture is stirred under reduced pressure (for example,
750mm) Ig, preferably 10-100mmHg>
evaporation to dryness at a temperature of 30 to 150°C, preferably 40 to 90°C, or 90 to 170°C under normal pressure,
Powdered lactate is obtained by dehydrating preferably at 100 to 140°C, flaking with a flaker, and then pulverizing.

(Examples) Next, the present invention will be described in more detail with reference to Examples, but these are merely illustrative and the present invention is not limited to these Examples.

Example 1 308 g of calcium lactate pentahydrate was added to 672 g of a 50% sodium lactate aqueous solution, and the mixture was heated at a temperature of 90 to 100°C.
A clear solution was obtained by heating and stirring for 0 minutes. This solution was evaporated to dryness under reduced pressure (60 to 70 ml II Hg) at a temperature of 0 to 90° C. to obtain 590 g of a powdered calcium-sodium lactate complex salt.

Example 2 218 g of calcium lactate anhydride was added to 50% by weight aqueous sodium lactate solution 11209, and 3
A clear solution was obtained by heating and stirring for 0 minutes. The solution was evaporated to dryness under reduced pressure (30-40 mm HO) at 60-70°C,
787 g of powdered calcium sodium lactate complex salt was obtained.

Example 3 308 g of calcium lactate pentahydrate was added to 640.5 g of a 20% by weight potassium lactate aqueous solution, and
A clear solution was obtained by heating and stirring for 0 minutes. This solution was evaporated to dryness at 90 to 100°C under reduced pressure (30 to 40 mmHg) to obtain a powdered calcium-potassium lactate complex salt of 349.79.

Example 4 218 g of calcium lactate anhydride was added to 50% by weight aqueous potassium lactate solution 12819, and heated and stirred at 50 to 70°C for 30 minutes to obtain a clear solution. This solution was mixed under reduced pressure (30~
Evaporate to dryness at 60-70°C to 862.
1 g of powdered calcium-potassium lactate complex salt was obtained.

Example 5 218 g of calcium lactate anhydride was added to 1070 g of a 20% by weight ammonium lactate aqueous solution, and the mixture was heated and stirred at a temperature of 20 to 30° C. for 30 minutes to obtain a clear solution. This solution was evaporated to dryness at 50 to 60°C under reduced pressure (20 to 30 mmHa) to obtain 504 g of powdered calcium ammonium lactate complex salt.

Example 6 308 g of calcium lactate pentahydrate was added to 896 g of a 50% by weight sodium lactate aqueous solution, and the mixture was heated at a temperature of 60 to 70°C for 30 minutes.
The mixture was heated and stirred for a minute. Next, the temperature was raised to normal pressure, and the temperature was increased to 130
Dehydration was carried out in the molten state at ~160°. After the dehydration was completed, the mixture was poured into a vat to obtain 648 g of flaky calcium-sodium lactate complex salt.

Example 7 50% L of calcium lactate pentahydrate 30Bg
(+) In addition to 672 g of sodium lactate aqueous solution, 70 to 9
A clear solution was obtained by heating and stirring for 3 C1 at a temperature of 0°C. This solution was heated under reduced pressure (20-30 mmHo) to 50-6
Evaporate to dryness at a temperature of 0°C to obtain 572 g of powdered L(+).
Calcium sodium lactate complex salt was obtained. In addition, this complex salt of lactic acid was confirmed to be a salt of L(+) lactic acid as a result of analysis using an enzymatic method.

In order to determine the structure of the products obtained in Examples 1 to 7, the following quantitative analysis was performed.

Regarding the complex salts obtained in Examples 1 to 7, calcium was determined by atomic absorption spectrometry. Furthermore, free acid was determined by gas chromatography, and then lactic acid in lactate was determined by enzymatic method. The amount of water of crystallization was determined by the Karl Fischer method. Regarding the complex salts obtained in Examples 1 to 4 and 6.7, sodium and potassium were determined by flame spectroscopy. Further, regarding the composite salt obtained in Example 5, nitrogen was determined by elemental analysis, and ammonium was determined. The results are shown in Table 1. Furthermore, the melting points (widths) of each lactate were measured and were as shown in Table 1.

(Left below) The structural formula shown in Table 2 is determined from the results shown in Table 1 and the properties of calcium lactate.

(Left below) Week 12j 1 [CH3CHCOO] 2 Ca @ 3[CH
3CHCOONal * 2H200)1
0H 2 [CH3CHCOO] 2 Ca # 5 [01301
COONal I 5M200)1
0H 3 [CH3CHCOO] 2 Ca * [CH3CHC
DO]-0,28200HOH 4[CH3CHCOO]2 Ca # 5[CH3C
HCOOK -0,28200)1
0H j 5 [CH3CHCOO]2 Ca * 2[CH
3CHCOON)+4 ] ・4H206 [CH
3CHCOO] 2 Ca ” 4[CH3CHCOON
al ・8200HO)1 7 [CH3C)IcOO]2 Ca e 3[C
H3CHCOONal 4 H20 (Effects of the Invention) As described above, the present invention provides that the lactate represented by the general formula (2) is in the form of a solid, powder, or powderable flake with low hygroscopicity, so that it is less hygroscopic than other powders. Because it can be easily blended with other products, it is easy to use and extremely effective when used in foods, cosmetics, industrial chemicals, etc. Further, since the amounts of the sodium salt, potassium salt and ammonium salt can be changed within the above range of m, a powdered lactic acid complex salt can be obtained depending on the purpose of use.

Claims (2)

[Claims] (1) General formula I ▲There are mathematical formulas, chemical formulas, tables, etc.▼(I) (However, in the formula, M is Na, K or NH_4, m is M
When M is K or NH_4, 0<m≦5, when M is Na, 2.4<m≦5, and n is 0≦n≦5). (2) A general formula characterized by reacting (a) 2.4 moles of sodium lactate<m≦5 moles or (b) 0 moles of potassium lactate or ammonium lactate<m≦5 moles with respect to 1 mole of calcium lactate. I ▲There are mathematical formulas, chemical formulas, tables, etc.▼(I) (However, in the formula, M is Na, K or NH_4, m is M
When M is K or NH_4, 0<m≦5, when M is Na, 2.4<m≦5, and n is 0≦n≦5). Method.