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Preparation method of divalent alginate and application of divalent alginate as anti-caking agent

A technology of alginate and anti-caking agent, applied in the direction of food science, etc., can solve the problems of unclean treatment, harm, and affecting the appearance and color of salt, and achieve strong market promotion prospects and high purity

Pending Publication Date: 2021-02-26
CHINASALT JINTAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Potassium ferrocyanide is commonly used as an anti-caking agent in my country. Because of its good effect and low price, it is generally used as a representative of high-efficiency anti-caking agents. However, the main raw materials for its production are hydrogen cyanide gas, calcium cyanide or sodium cyanide. etc., because if the monomers are not treated cleanly during the production process, there will inevitably be a certain amount of cyanide and hexacyanoferrate (III) salt, and it will decompose into cyanide at 400 ° C, although it will add cyanide to the salt The amount is far from enough to cause harm to people, but still exists as a risk
Kelp powder, green tea powder, etc. are used as anti-caking agents. Because they are added in large amounts, they can have a certain anti-caking effect and affect the appearance and color of the salt. Therefore, these substances can only be used for research purposes, and cannot be put into actual market promotion. application

Method used

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  • Preparation method of divalent alginate and application of divalent alginate as anti-caking agent
  • Preparation method of divalent alginate and application of divalent alginate as anti-caking agent
  • Preparation method of divalent alginate and application of divalent alginate as anti-caking agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation method concrete steps of magnesium alginate are as follows:

[0037] (1) Kelp pretreatment

[0038] Put the food-grade kelp in 2% dilute hydrochloric acid solution for 24 hours, and then wash it repeatedly with deionized water until the cleaning solution is detected with 0.1mol / L silver nitrate without white precipitation; then cut the washed kelp into filaments , beat into a slurry with a mixer.

[0039] (2) Preparation of Sodium Alginate

[0040] Add the pretreated kelp slurry into a 20L double-layer glass reactor and gradually heat it to 45°C, then keep the temperature constant, and then slowly add 100g / L sodium carbonate solution. It is observed that the algae gradually collapse. When the pH value is stabilized at 8, no sodium carbonate solution is added, and the heat preservation is continued for 2 hours, so that the alginic acid continues to be digested, then the heating is stopped, and it is left to stand for 10 hours.

[0041] (3) purification...

Embodiment 2

[0075] Step (1)-step (3) is the same as embodiment 1,

[0076] Step (4) In a 10L double-layer glass reactor, add 300g of sodium alginate solid prepared in step (3), then add 2L of deionized water, heat slowly and gradually to 45°C, and then keep the temperature constant to make the sodium alginate completely Dissolve, under the condition of slow stirring, then gradually add 300g / L magnesium chloride solution, gel-like magnesium alginate precipitates in the solution, extract the supernatant to detect magnesium ions, when the magnesium ions exceed 1g / L, it can be regarded as The reaction was terminated. Wherein, the magnesium chloride solution is added with a concentration of 20% ammonia water accounting for 1% of the mass of the magnesium chloride solution.

[0077] From Figure 6 It can be seen that the first is the solvent peak, and the second is the peak of magnesium alginate. It can be seen from the spectrum of high performance liquid chromatography that there are no othe...

Embodiment 3

[0079] The preparation and purification of sodium alginate are the same as in Example 1.

[0080] Synthesis of Calcium Alginate

[0081] In a 10L double-layer glass reaction kettle, add 300g of sodium alginate solid prepared in step (3), then add 2L of deionized water, slowly heat to 45°C, and then keep the temperature constant to completely dissolve the sodium alginate. In some cases, then gradually add 300g / L calcium chloride solution, gel-like calcium alginate precipitates appear in the solution, and the supernatant is extracted for calcium ion detection. When the calcium ion exceeds 1g / L, the reaction can be regarded as terminated.

[0082] Purification of Calcium Alginate

[0083] Dilute the calcium alginate obtained in step (4) with water, filter and add dilute hydrochloric acid to precipitate the gel, and remove the supernatant (including soluble impurities) by centrifugation. Suspend the collected gel in methanol, add a calculated amount of ammonia water to neutraliz...

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Abstract

The invention relates to the field of anti-caking agents, in particular to a preparation method of divalent alginate and application of the divalent alginate as an anti-caking agent. Kelp is used as araw material, sodium alginate is obtained after acid dissolution, alkalization and repeated purification, and divalent alginate is further synthesized through an ion exchange method. The divalent alginate synthesized by the method disclosed by the invention is high in purity and is used as an anti-caking agent, and the anti-caking performance research shows that the anti-caking performance of thedivalent alginate is equivalent to that of potassium ferrocyanide, so that the divalent alginate has a relatively strong market popularization prospect as an anti-caking agent for salt.

Description

technical field [0001] The invention relates to the field of anti-caking agents, in particular to a preparation method of divalent alginate and its application as an anti-caking agent. Background technique [0002] Powder materials, especially refined salt, are more likely to agglomerate due to their particle range between 0.15mm-0.85mm. Therefore, it is necessary to study and understand the cause and mechanism of salt agglomeration, and then choose to use new ones through research. Anti-caking technology or adding new anti-caking agents to solve the caking problem of refined salt, especially the caking problem of refined edible salt. [0003] The anti-caking methods of refined salt at home and abroad mainly include controlling the particle size and surface structure of salt particles, adding anti-caking agents, and optimizing packaging and storage. In actual production, the crystal shape of salt products is usually cubic, and the particle size distribution range is large. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/04A23L29/30A23L27/40
CPCC08B37/0084C08B37/0003A23L27/40A23L29/30
Inventor 谢兴胜陈虎陈留平管国兴周国敏李伟金柳姚静吴琳琳
Owner CHINASALT JINTAN