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Process for preparing calcium propionate by using japanese pearl oyster conch

A technology of Pinctada martensii and calcium propionate, applied in carboxylate preparation, organic chemistry, etc., can solve the problems of low biological activity of raw materials, hazards of calcium propionate, high production cost, etc., and achieve high-value utilization, Effect of reducing pollution and low production cost

Inactive Publication Date: 2008-10-22
SOUTH CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw materials used in this method have more impurities, contain a small amount of heavy metals, are not easy to clean, and the biological activity of the raw materials is low, which will cause pollution during the preparation process, and the produced calcium propionate will also cause harm to the human body. Mining will also cause damage to the environment, and the production cost is also high

Method used

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  • Process for preparing calcium propionate by using japanese pearl oyster conch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Prepare calcium propionate as follows:

[0026] (1) Wash the Pinctada martensii shells after bead opening 3 times with tap water to remove the impurities adhered to the shell surface; add 0.20mol / L hydrochloric acid and stir and soak for 2 minutes, then rinse with clear water to remove the pigment on the shell surface layer and a small amount of soluble organic matter; air-dried, dried at 100°C for 1 hour, then crushed the dried shells, and passed through an 80-mesh sieve to obtain shell powder.

[0027] (2) Take 1000 grams of shell powder, prepare 3mol / L hydrochloric acid, add shell powder to the acid solution at a ratio of 1:15, dissolve at 30°C for 4 hours, and stir occasionally to obtain Mixture.

[0028] (3) The mixed solution after the acid treatment is centrifuged, the supernatant is taken out, and 1.0mol / L sodium carbonate solution is slowly added, wherein the volume ratio of the supernatant solution and the sodium carbonate solution is 9: 4, while constantly s...

Embodiment 2

[0032] Prepare calcium propionate as follows:

[0033] (1) Wash the pearl oyster shells after opening the pearls with tap water 3 times to remove the impurities adhered to the shell surface; add 0.50mol / L hydrochloric acid and stir and soak for 5 minutes, then rinse with clear water to remove the pigment on the shell surface layer and a small amount of soluble organic matter; air-dried, dried at 110° C. for 1.5 hours, then crushed the dried shells, and passed through a 120-mesh sieve to obtain shell powder.

[0034] (2) Take 500 grams of shell powder, prepare 5mol / L hydrochloric acid, add shell powder to the acid solution at a ratio of 1:20, dissolve at 40°C for 2 hours, and stir occasionally to obtain Mixture.

[0035] (3) Centrifuge the mixed solution after the acid treatment, extract the supernatant, slowly add 1.0mol / L sodium carbonate solution, wherein the volume ratio of the supernatant to the sodium carbonate solution is 9:5, and keep stirring , after sufficient preci...

Embodiment 3

[0039] Prepare calcium propionate as follows:

[0040] (1) Wash the Pinctada martensii shells after bead opening 3 times with tap water to remove the impurities adhered to the shell surface; add 0.30mol / L hydrochloric acid and stir and soak for 3 minutes, then rinse with clear water to remove the pigment on the shell surface layer and a small amount of soluble organic matter; air-dried, dried at 105° C. for 2.0 hours, then crushed the dried shells, and passed through a 100-mesh sieve to obtain shell powder.

[0041] (2) Take 500 grams of shell powder, prepare 4mol / L hydrochloric acid, add shell powder to the acid solution at a ratio of 1:25, dissolve at 35°C for 3 hours, and stir occasionally to obtain Mixture.

[0042](3) Centrifuge the mixed solution after the acid treatment, extract the supernatant, slowly add 1.0mol / L sodium carbonate solution, wherein the volume ratio of the supernatant to the sodium carbonate solution is 9:6, and keep stirring , after sufficient precip...

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Abstract

The invention relates to a method for preparing calcium propionate by using a shell of Pearl Oyster Pinctada martensi, which comprises the following steps: (1) the pre-processing of the shell; (2) the processing of the acid: a shell powder is dissolved by the hydrochloric acid and a mixed solution is obtained; (3) precipitation: the mixed solution in the step (2) is centrifuged and the upper clear liquid is taken out and the calcium carbonate solution is added, which is standing after full precipitation, and then white precipitation is obtained after being extracted, filtered and washed and the residue is filtered, and then drying is carried out. (4) the propionic acid reaction: the dried precipitation is taken and distilled water is added, the carbon dioxide gas is pumped in and the propionic acid solution is added, wherein, the proportion of the quality of the precipitation: the volume of the distilled water: the volume of the propionic acid solution is 1:30-40:2.5-3.0, the reaction is carried out by stirring for 30 min to 40min at the temperature of 55 to 60 DEG C and the calcium propionate solution is obtained; (5) drying: the obtained calcium propionate solution is dried and a white powder shaped calcium propionate product is obtained. The technical skill of the invention has the advantages of simple operation, low product cost, low energy cost, stable product quality, thus improving the economic benefit of the production enterprise.

Description

technical field [0001] The invention relates to a method for preparing calcium propionate, in particular to a method for preparing calcium propionate by using Pinctada martensii shells. Background technique [0002] Pinctada martensi (Pinctada martensi), also known as Hepu pearl oyster, belongs to the genus Pinctada martensi of mollusk bivalve pearl oyster order pearl oyster family pearl oyster. my country's Hainan, Guangdong, Guangxi and other provinces are rich in resources of Pinctada martensii. Since the successful artificial breeding of Pinctada martensii in my country in the mid-1960s and mass production, the breeding industry of Pinctada martensii has developed rapidly, and the aquaculture output has increased from 14.5 kg in 1981 to 7,000 kg in 2007. After the pearling of Pinctada martensii produces a large amount of shell waste, among which calcium carbonate (CaCO 3 ) content is as high as more than 95%, and most shell wastes are directly discarded without being r...

Claims

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Application Information

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IPC IPC(8): C07C53/122C07C51/41
Inventor 吴燕燕李来好杨贤庆李有宁刁石强陈胜军岑剑伟
Owner SOUTH CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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