Preparation method for feed-grade copper citrate

Abstract

The invention discloses a preparation method for feed-grade copper citrate. The method comprises the following steps: (1) throwing citric acid and water into a reaction kettle to form a 20%-25% citricacid aqueous solution, and performing heating to the temperature of 80 DEG C-100 DEG C; (2) turning on a stirrer, slowly adding basic copper carbonate for a neutralization reaction according to the mass ratio of the citric acid to the basic copper carbonate of 1:(0.8-1) to form copper citrate, and adding a little amount of citric acid to control the pH value of a reaction solution to be 4-6, wherein a generated CO2 gas enters an absorption tank through a gas discharging opening to be absorbed; (3) filtering the generated copper citrate, performing concentration, performing cooling to a room temperature, putting the cooled material into a centrifugation machine, performing dehydration to obtain a copper citrate crystal, and discharging a separated waste liquid into a waste-liquid pond forrecycling; and (4) putting the obtained copper citrate crystal into a dryer, performing drying for 1-2h at the temperature condition of 100 DEG C-120 DEGC to remove some of crystal water to obtain a finished product of the feed-grade copper citrate. The product obtained by the method provided by the invention has a high yield, less impurities, and an environmentally-friendly production process.

Description

technical field

[0001] The invention belongs to the field of feed additives, in particular to a preparation method of feed grade copper citrate. Background technique

[0002] In recent years, the new copper sources used by domestic feed and breeding enterprises mainly include amino acid complex (chelate) copper, protein copper, yeast copper, basic copper chloride, etc., of which amino acid complex (chelate) copper, protein copper, yeast copper It belongs to organic copper, while basic copper chloride is inorganic copper. Most of the research results have confirmed that the biological availability of organic copper is higher than that of inorganic copper, and it can reduce the content of fecal copper in animal excrement and reduce the pollution of heavy metals to the environment. However, the main problem of existing amino acid complex (chelated) copper, protein copper, and yeast copper in practical applications is the lack of direct experimental evidence of chemical charact...

Examples

Embodiment 1

[0022] A preparation method for feed grade copper citrate, comprising the following steps:

[0023] (1) 100kg of citric acid and 400kg of deionized water are metered into the reactor to form a 20% aqueous solution of citric acid and heated to 80°C;

[0024] (2) open agitator, slowly add 100kg basic copper carbonate and carry out neutralization reaction, generate copper citrate, utilize citric acid to control reaction solution pH value to be 4, the CO produced 2 The gas enters the absorption tank filled with NaOH solution through the exhaust port to be absorbed;

[0025] (3) After filtering, concentrating, and cooling to room temperature, the copper citrate generated is put into a centrifuge for dehydration to obtain copper citrate crystals, and the separated waste liquid is discharged into the waste liquid pool for recycling;

[0026] (4) Put the obtained copper citrate crystals into a desiccator and dry at 100° C. for 1 hour to remove part of the crystal water to obtain 150....

Embodiment 2

[0029] A preparation method for feed grade copper citrate, comprising the following steps:

[0030] (1) 100kg of citric acid and 300kg of water (the mixture of deionized water and separation waste liquid) are metered into the reactor to form a 25% aqueous solution of citric acid and heated to 100°C;

[0031] (2) open agitator, slowly add 100kg basic copper carbonate and carry out neutralization reaction, generate copper citrate, control reaction solution pH value to be 6, the CO produced 2 The gas enters the absorption tank filled with NaOH solution through the exhaust port to be absorbed;

[0032] (3) After filtering, concentrating, and cooling to room temperature, the copper citrate generated is put into a centrifuge for dehydration to obtain copper citrate crystals, and the separated waste liquid is discharged into the waste liquid pool for recycling;

[0033] (4) Put the obtained copper citrate crystals into a desiccator and dry at 120° C. for 2 hours to remove part of th...

Embodiment 3

[0036] A preparation method for feed grade copper citrate, comprising the following steps:

[0037] (1) 100kg of citric acid and 376kg of water (the mixed solution of deionized water and separation waste liquid) are metered into the reactor to form a 21% aqueous solution of citric acid and heated to 90°C;

[0038] (2) open agitator, slowly add 90kg basic copper carbonate and carry out neutralization reaction, generate copper citrate, control reaction solution pH value to be 5, the CO produced 2 The gas enters the Ca(OH) 2 The absorption tank of the solution is absorbed;

[0039] (3) After filtering, concentrating, and cooling to room temperature, the copper citrate generated is put into a centrifuge for dehydration to obtain copper citrate crystals, and the separated waste liquid is discharged into the waste liquid pool for recycling;

[0040] (4) Put the obtained copper citrate crystals into a desiccator and dry them for 1.5 hours at 110° C. to remove part of the crystal wa...

technical field

[0001] The invention belongs to the field of feed additives, in particular to a preparation method of feed grade copper citrate. Background technique

[0002] In recent years, the new copper sources used by domestic feed and breeding enterprises mainly include amino acid complex (chelate) copper, protein copper, yeast copper, basic copper chloride, etc., of which amino acid complex (chelate) copper, protein copper, yeast copper It belongs to organic copper, while basic copper chloride is inorganic copper. Most of the research results have confirmed that the biological availability of organic copper is higher than that of inorganic copper, and it can reduce the content of fecal copper in animal excrement and reduce the pollution of heavy metals to the environment. However, the main problem of existing amino acid complex (chelated) copper, protein copper, and yeast copper in practical applications is the lack of direct experimental evidence of chemical charact...

Examples

Embodiment 1

[0022] A preparation method for feed grade copper citrate, comprising the following steps:

[0023] (1) 100kg of citric acid and 400kg of deionized water are metered into the reactor to form a 20% aqueous solution of citric acid and heated to 80°C;

[0024] (2) open agitator, slowly add 100kg basic copper carbonate and carry out neutralization reaction, generate copper citrate, utilize citric acid to control reaction solution pH value to be 4, the CO produced 2 The gas enters the absorption tank filled with NaOH solution through the exhaust port to be absorbed;

[0025] (3) After filtering, concentrating, and cooling to room temperature, the copper citrate generated is put into a centrifuge for dehydration to obtain copper citrate crystals, and the separated waste liquid is discharged into the waste liquid pool for recycling;

[0026] (4) Put the obtained copper citrate crystals into a desiccator and dry at 100° C. for 1 hour to remove part of the crystal water to obtain 150....

Embodiment 2

[0029] A preparation method for feed grade copper citrate, comprising the following steps:

[0030] (1) 100kg of citric acid and 300kg of water (the mixture of deionized water and separation waste liquid) are metered into the reactor to form a 25% aqueous solution of citric acid and heated to 100°C;

[0031] (2) open agitator, slowly add 100kg basic copper carbonate and carry out neutralization reaction, generate copper citrate, control reaction solution pH value to be 6, the CO produced 2 The gas enters the absorption tank filled with NaOH solution through the exhaust port to be absorbed;

[0032] (3) After filtering, concentrating, and cooling to room temperature, the copper citrate generated is put into a centrifuge for dehydration to obtain copper citrate crystals, and the separated waste liquid is discharged into the waste liquid pool for recycling;

[0033] (4) Put the obtained copper citrate crystals into a desiccator and dry at 120° C. for 2 hours to remove part of th...

Embodiment 3

[0036] A preparation method for feed grade copper citrate, comprising the following steps:

[0037] (1) 100kg of citric acid and 376kg of water (the mixed solution of deionized water and separation waste liquid) are metered into the reactor to form a 21% aqueous solution of citric acid and heated to 90°C;

[0038] (2) open agitator, slowly add 90kg basic copper carbonate and carry out neutralization reaction, generate copper citrate, control reaction solution pH value to be 5, the CO produced 2 The gas enters the Ca(OH) 2 The absorption tank of the solution is absorbed;

[0039] (3) After filtering, concentrating, and cooling to room temperature, the copper citrate generated is put into a centrifuge for dehydration to obtain copper citrate crystals, and the separated waste liquid is discharged into the waste liquid pool for recycling;

[0040] (4) Put the obtained copper citrate crystals into a desiccator and dry them for 1.5 hours at 110° C. to remove part of the crystal wa...

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