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Shell-derived complex calcium malate product and preparation method thereof

A technology for complexing calcium and malic acid, which is applied in the preparation of carboxylate, carboxylate, and organic compounds, etc. It can solve the problems of difficult control of process conditions and product quality, serious environmental pollution, and low production efficiency. Achieve the effect of abundant raw materials, low preparation cost and high production efficiency

Active Publication Date: 2014-10-08
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods all need to calcinate the calcium source first to make milk of lime, the production efficiency is low, the preparation cost is high, the process is cumbersome, the process conditions and product quality are difficult to control, the environmental pollution is serious, the energy consumption is large, and it is not easy to implement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take 3.62 kg of cuttlefish bones washed by seawater in a tank-type extractor, add 4.08 kg of malic acid solids and 54 liters of seawater, stir evenly at room temperature, and convert the calcium carbonate component of cuttlefish bones into water-soluble calcium ions first, After 13 minutes, when there are no more carbon dioxide bubbles, solid-liquid separation removes acid-insoluble impurities, and the filtrate is sent to the crystallization tank, and the pH value of the filtrate is controlled to be 6.3-6.5, and the weight ratio of malic acid and calcium ions is 2-5:1 , Complexed calcium ions generate precipitates, filtered through a three-legged centrifuge, and the precipitates are dried to obtain malic acid complexed calcium crystalline powder products.

[0035] After testing, the obtained malic acid complex calcium product has the characteristics of weak acid and weak alkali slightly soluble, insoluble in water and alcohol insoluble; the purity of the malic acid compl...

Embodiment 2

[0037] 75 kg of crushed snail shells were placed in a horizontal extractor, and 2 times the weight ratio of 1.25 mol / L hydrochloric acid solution was added to spray and dissolve calcium ions. Ionic calcium, solid-liquid separation to remove impurities such as protein, polysaccharide, pigment, chitin and acid insoluble matter, the filtrate is poured into the crystallization tank, and the malic acid extract is added to the crystallization tank to 51 liters, and the concentration of malic acid in the filtrate is controlled to 178 ~180 g / L, calcium ion concentration 55~57 g / L, pH value 7.2~7.4, complexed calcium ions at 37°C to form a precipitate, filtered through a plate and frame filter press, and the precipitate was dried to obtain apples Acid-complexed calcium crystalline product.

[0038]After testing, the obtained malic acid complex calcium product has the characteristics of weak acid and weak base slightly soluble, insoluble in water and alcohol insoluble; the purity of the...

Embodiment 3

[0040] The shell powder of 1.56 kg sea clam shells is put into the fully automatic Soxhlet extraction tank, and 2 mol / L acetic acid solution with a weight ratio of 4 times is added, and calcium ions are dissolved by reflux under boiling water bath conditions, and acetic acid is added to maintain the hydrogen content of the system. The ion concentration is not lower than 1.25 mol / L. Firstly, the water-insoluble calcium salt in the shell is completely converted into water-soluble ionized calcium. The solid-liquid separation removes the acid-insoluble impurities. The filtrate is sent to the crystallization tank, and the apple juice processing wastewater is added to the crystallization tank. to 52 liters, control the concentration of malic acid in the filtrate to 55-60 g / L, the concentration of calcium ions to 12-14 g / L, and the pH value to 8.9-9.1, complex calcium ions in a boiling water bath to form a precipitate, and centrifuge through a three-legged Machine filtration, and the ...

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Abstract

The invention provides a shell-derived complex calcium malate product and a preparation method thereof, relates to green chemical preparation of the marine biological materials and natural calcium nutrient supplements and belongs to the field of the high-valued utilization and cyclic utilization of the shell resources and the malic acid resources. The preparation method comprises the steps of converting water-insoluble calcium salts in shells serving as raw material into water solution ionized calcium by use of an acid solution, carrying out solid-liquid separation to remove impurities, controlling the pH value and the temperature of the filtrate as well as the concentrations and the weight ratio of the malate and the calcium ions, and complexing and precipitating the calcium ions, and finally processing the complex calcium malate. The purity of the complex calcium malate product is greater than or equal to 93%, wherein the content of the calcium ions is greater than or equal to 17% and the content of malate radical is greater than or equal to 64%; the complex calcium malate product is sparingly soluble to weak acids and weak bases, slightly soluble in water and insoluble to alcohol. The preparation method is capable of remarkably improving the purity, yield and quality of the complex calcium malate, novel in design, rich in raw materials, low in cost, simple in process, environment-friendly and convenient to implement, can be widely popularized, and can open up a new way for the high-valued utilization and cyclic utilization of the shell and malic acid resources.

Description

technical field [0001] The invention relates to shell-derived malic acid complexed calcium and a preparation method thereof, relates to the green chemical preparation of marine biological materials and natural calcium nutrition enhancers, and belongs to the field of high-value utilization and recycling of shell resources and malic acid resources. Background technique [0002] The glandular cell secretion of the mantle of molluscs, in the natural environment, can form calcifications that protect the soft parts of the body, that is, shells. [0003] The structure of the shell can generally be divided into three layers, the outermost layer is the cuticle with pigment, which is composed of the exudate secreted by the edge of the mantle; the middle layer is the prismatic layer, which is composed of the prismatic calcite secreted by the edge of the mantle, and the outer layer And the middle layer can expand the area of ​​the shell, but does not increase the thickness; the inner la...

Claims

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Application Information

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IPC IPC(8): C07C51/41C07C59/245
CPCC07C51/412C07C59/245
Inventor 陈剑锋林筱颖陈浩李娜
Owner FUZHOU UNIV
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