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Shell-source malic acid complex calcium product and preparation method

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: 2016-06-01
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 3.62kg of cuttlefish bones washed by seawater in a tank-type extractor, add 4.08kg 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 no more carbon dioxide bubbles are generated, solid-liquid separation removes acid-insoluble impurities, and the filtrate is sent to a crystallization tank. Complexed calcium ions generate precipitates, which are 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 base slightly soluble, insoluble in water and alcohol insoluble; the purity of the malic acid complex calcium product is 96.0%, of which the calcium ion content is 24.2%, and the malic acid content is 71.8%. ; The t...

Embodiment 2

[0037] 75kg of crushed snail shells are placed in a horizontal extractor, and 1.25mol / L hydrochloric acid solution with a weight ratio of 2 times is 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~ 180g / L, calcium ion concentration 55-57g / 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 malic acid complexation 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 1.56kg sea clam shell is put into the automatic Soxhlet extraction tank, add 2mol / L acetic acid solution with a weight ratio of 4 times, reflux and dissolve calcium ions under the condition of boiling water bath, and maintain the hydrogen ions in the system by feeding acetic acid The concentration is not lower than 1.25mol / L. First, the water-insoluble calcium salt in the shells is completely converted into water-soluble ionized calcium. The solid-liquid separation removes acid-insoluble impurities. The filtrate is sent to the crystallization tank, and the apple juice processing wastewater is added to the crystallization tank. 52 liters, control the concentration of malic acid in the filtrate to 55-60g / L, the concentration of calcium ions to 12-14g / L, and the pH value to 8.9-9.1, complex calcium ions to form precipitates under boiling water bath conditions, and filter through a three-legged centrifuge. The precipitate is air-dried to obtain malic acid...

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Abstract

The invention provides a shell-derived malic acid complex 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. Using shells as raw materials, acid solution is used to convert water-insoluble calcium salts in shells into water-soluble ionic calcium, solid-liquid separation to remove impurities, and then control the pH value, temperature, concentration and weight ratio of the filtrate, malic acid and calcium ions, complexation After precipitation of calcium ions, it is processed into calcium malate complex. The purity of this malic acid complexed calcium is ≥93%, of which the content of calcium ions is ≥17%, and the content of malic acid is ≥64%. The invention can significantly improve the purity, yield and quality of malic acid complexed calcium, has novel conception, rich raw materials, low cost, simple process, green environmental protection, easy implementation, great popularization, and can be used as a resource for shells and malic acid. High-value utilization and recycling have found new ways.

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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Patent Type & Authority Patents(China)
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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