CN105236447A - Method for producing food-grade potassium chloride by using multi-stage nano-filtration membrane separation technology - Google Patents
Method for producing food-grade potassium chloride by using multi-stage nano-filtration membrane separation technology Download PDFInfo
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- CN105236447A CN105236447A CN201510585718.6A CN201510585718A CN105236447A CN 105236447 A CN105236447 A CN 105236447A CN 201510585718 A CN201510585718 A CN 201510585718A CN 105236447 A CN105236447 A CN 105236447A
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Abstract
The present invention discloses a method for producing food-grade potassium chloride by using a multi-stage nano-filtration membrane separation technology. According to the present invention, the flotation agent in the industrial-grade potassium chloride is removed by using the multi-stage nano-filtration membrane separation technology, the method comprises dissolution, filtration, multi-stage nano-filtration membrane separation, crystallization, solid-liquid separation, drying and other steps, the whole process does not require the addition of other substances, the production process is simple and easy to control, and the cost is low.
Description
Technical field
The present invention relates to a kind of method utilizing industrial potassium chloride to produce food-grade potassium chloride.
Background technology
Food-grade potassium chloride is edible potassium chloride again, is colourless elongated rhombus or cubic system or white crystalline powder, and odorless, taste be salty, soluble in water, be dissolved in glycerine, be slightly soluble in ethanol.The purposes of food-grade potassium chloride is a lot, as can be used as in the food industry for salt agent, accessory substance, gelling additive, yeast food, seasonings, sweetener, PH control agent etc.Food-grade potassium chloride is the general nutrition agent being used as potassium in food, compare with the nutrition agent of other potassium, there is the features such as low price, potassium content are high, easy storage, so Repone K uses the most extensive as the nutrition-fortifying agent of potassium, also can be used as Nutrious fermented dose in leavened food.In addition, because potassium ion has very strong chelating and gelling characteristic, food-grade potassium chloride can be used in food is used as jelling agent.
Normal food grade potassium chloride be prepared as by physical purification, by technical grade Repone K through distillation or add the Methods For Purifications such as coagulant aids and obtaining food-grade potassium chloride.If the industrial potassium chloride produced is produced by reverse flotation cold crystallization method, containing stearylamine, dodecyl morpholine, 2# wet goods flotation reagent organic impurities in its industrial potassium chloride.
Summary of the invention
The object of the present invention is to provide a kind of method utilizing multistage Nanofiltration Membrane Separation Technology to produce food-grade potassium chloride, the flotation agent in technical grade Repone K is removed by the membrane separation technique of multistage nanofiltration membrane separation, whole process does not need to increase newly into other materials again, production process is simply easy to control, and cost is low.
Due in the technical grade Repone K that produced by reverse flotation cold crystallization containing stearylamine, dodecyl morpholine, 2# wet goods flotation agent organism, therefore by stearylamine, dodecyl morpholine, 2# wet goods organic filtration, refined potassium chloride solution can be obtained by multistage Nanofiltration Membrane Separation Technology.Because nanofiltration membrane separation is a kind of physical process, i.e. the molecular weight cut-off organism and the polyvalent ion (stearylamine, dodecyl morpholine, 2# wet goods) that are greater than 100, allows small molecules and univalent ion (K
+, Cl
?) through, and then reach purification and impurity removal, the object of refined potassium chloride solution, and then obtain food-grade potassium chloride by crystallization.Whole process does not need to increase newly into other materials again, instead of tradition costly, treatment process that technique is loaded down with trivial details,
Technical scheme of the present invention is: a kind of method utilizing multistage Nanofiltration Membrane Separation Technology to produce food-grade potassium chloride, is characterized in that, comprise the following steps:
A) dissolve: at room temperature, technical grade solid potassium chloride is dissolved as Klorvess Liquid;
B) filter: in Klorvess Liquid, add auxiliary agent A react, obtain containing sedimentary Repone K crude product solution after reaction; To filter through filter containing sedimentary Repone K crude product solution, and filter throw out, obtain Repone K primary solution;
C) multistage nanofiltration membrane separation: for step b) in the Repone K primary solution arrived through multistage Nanofiltration Membrane Separation Technology, the organism that contains and remaining high valence ion in removing solution, obtain Repone K refined soln;
D) crystallization: by step c) in the Repone K refined soln that obtains carry out acid adjustment neutralizing treatment, in acid adjustment process, add auxiliary agent B makes Repone K refined soln be adjusted to neutral solution, then concentrate, after concentrated, neutral Repone K refined soln is carried out crystallization through crystallizer again;
E) solid-liquid separation: by steps d) Repone K after crystallization through solid-liquid separation, obtain the refined potassium chloride wet;
F) dry: by step e) be separated the wet refined potassium chloride that obtains after super-dry, obtain purified diet grade potassium chloride.
Described auxiliary agent A is one or several mixture of food grade potassium hydroxide or salt of wormwood or potassium sulfate.
Described auxiliary agent B is food grade citric acid or lactic acid.
The production method difference that the present invention compares other food-grade potassium chloride is, remove stearylamine, dodecyl morpholine, the 2# wet goods flotation agent organism in industrial potassium chloride by multistage Nanofiltration Membrane Separation Technology, no longer increase newly into other materials in whole Using Multistage Membranes sepn process.Different from the principle of traditional separation method, membrane sepn is separated in molecular range, and this process is a kind of physical process, do not need to occur the change of phase and add auxiliary agent, and efficient, energy-saving and environmental protection and production process are simply easy to control.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
As shown in Figure 1, the present invention utilizes multistage Nanofiltration Membrane Separation Technology to produce the method for food-grade potassium chloride, comprises the operations such as dissolving, filtration, multistage nanofiltration membrane separation, crystallization, solid-liquid separation, drying, it is characterized in that, point following steps are implemented:
A) dissolve: at room temperature, technical grade solid potassium chloride is dissolved as Klorvess Liquid;
B) filter: one or several mixture adding food grade potassium hydroxide or salt of wormwood or potassium sulfate in Klorvess Liquid, allow other impurity such as a small amount of calcium ion, magnesium ion or barium ion in itself and industrial potassium chloride react, after reaction, obtain the throw outs such as calcium carbonate, magnesium sulfate or barium sulfate; To filter through filter containing sedimentary Repone K crude product solution, and filter throw out, obtain Repone K primary solution;
C) multistage nanofiltration membrane separation: for step b) in the Repone K primary solution arrived through multistage Nanofiltration Membrane Separation Technology, the high valence ions such as the stearylamine contained in removing solution, dodecyl morpholine, 2# wet goods organism and remaining micro-calcium ion, magnesium ion, barium ion, obtain Repone K refined soln;
D) crystallization: by step c) in the Repone K refined soln that obtains carry out acid adjustment neutralizing treatment, food grade citric acid is added or lactic acid makes Repone K refined soln be adjusted to neutral solution in acid adjustment process, then concentrate, after concentrated, neutral Repone K refined soln is carried out crystallization through crystallizer again;
E) solid-liquid separation: by steps d) Repone K after crystallization through solid-liquid separation, obtain the refined potassium chloride wet;
F) dry: by step e) be separated the wet refined potassium chloride that obtains after super-dry, obtain purified diet grade potassium chloride.
Claims (3)
1. utilize multistage Nanofiltration Membrane Separation Technology to produce a method for food-grade potassium chloride, it is characterized in that, comprise the following steps:
A) dissolve: at room temperature, technical grade solid potassium chloride is dissolved as Klorvess Liquid;
B) filter: in Klorvess Liquid, add auxiliary agent A react, obtain containing sedimentary Repone K crude product solution after reaction; To filter through filter containing sedimentary Repone K crude product solution, and filter throw out, obtain Repone K primary solution;
C) multistage nanofiltration membrane separation: for step b) in the Repone K primary solution that obtains through multistage Nanofiltration Membrane Separation Technology, the organism contained in removing solution and remaining high valence ion, obtain Repone K refined soln;
D) crystallization: by step c) in the Repone K refined soln that obtains carry out acid adjustment neutralizing treatment, in acid adjustment process, add auxiliary agent B makes Repone K refined soln be adjusted to neutral solution, then concentrate, after concentrated, neutral Repone K refined soln is carried out crystallization through crystallizer again;
E) solid-liquid separation: by steps d) Repone K after crystallization through solid-liquid separation, obtain the refined potassium chloride wet;
F) dry: by step e) be separated the wet refined potassium chloride that obtains after super-dry, obtain purified diet grade potassium chloride.
2. utilize multistage Nanofiltration Membrane Separation Technology to produce the method for food-grade potassium chloride as claimed in claim 1, it is characterized in that, described auxiliary agent A is one or several mixture of food grade potassium hydroxide or salt of wormwood or potassium sulfate.
3. utilize multistage Nanofiltration Membrane Separation Technology to produce the method for food-grade potassium chloride as claimed in claim 1, it is characterized in that, described auxiliary agent B is food grade citric acid or lactic acid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510585718.6A CN105236447A (en) | 2015-09-15 | 2015-09-15 | Method for producing food-grade potassium chloride by using multi-stage nano-filtration membrane separation technology |
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| CN201510585718.6A CN105236447A (en) | 2015-09-15 | 2015-09-15 | Method for producing food-grade potassium chloride by using multi-stage nano-filtration membrane separation technology |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430248A (en) * | 2016-11-11 | 2017-02-22 | 中国科学院青海盐湖研究所 | Method for preparing potassium chloride by utilizing potassium mixed salt |
| CN110078098A (en) * | 2019-05-06 | 2019-08-02 | 澧县腾飞化工有限公司 | A kind of impurity removal process preparing high pure nitric acid potassium |
| CN110386610A (en) * | 2018-04-23 | 2019-10-29 | 格尔木藏格锂业有限公司 | The production method of food-grade potassium chloride |
| CN110451529A (en) * | 2019-07-17 | 2019-11-15 | 青岛沃赛海水淡化科技有限公司 | A kind of method of purification of sodium chloride for injection |
-
2015
- 2015-09-15 CN CN201510585718.6A patent/CN105236447A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430248A (en) * | 2016-11-11 | 2017-02-22 | 中国科学院青海盐湖研究所 | Method for preparing potassium chloride by utilizing potassium mixed salt |
| CN110386610A (en) * | 2018-04-23 | 2019-10-29 | 格尔木藏格锂业有限公司 | The production method of food-grade potassium chloride |
| CN110078098A (en) * | 2019-05-06 | 2019-08-02 | 澧县腾飞化工有限公司 | A kind of impurity removal process preparing high pure nitric acid potassium |
| CN110451529A (en) * | 2019-07-17 | 2019-11-15 | 青岛沃赛海水淡化科技有限公司 | A kind of method of purification of sodium chloride for injection |
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