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A technology of zinc gluconate and gluconic acid, applied in the field of organic compound preparation
Inactive Publication Date: 2016-02-03
TIANJIN CHEM REAGENT RES INST
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Problems solved by technology
[0003] The usual production method of zinc gluconate is to use sodium gluconate to react with zinc sulfate, and the product obtained is viscous, which is difficult to further process and difficult to sell. Problems in the preparation method: 1. In the further processing steps, the air permeability is not good during drying, the water evaporates slowly, it is not easy to dry, it is easy to smolder, and it is very dangerous. It is necessary to add automatic turning equipment, many equipments, and the complex production cost is high. Difficult to reduce production costs; 2. The finished product is crushed, with a lot of dust, which is difficult for enterprises to produce in large quantities, which is not conducive to the development of enterprises and the improvement of economic benefits
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Embodiment 1
[0028] A preparation method for zinc gluconate, comprising the following steps:
[0029] ⑴Salt-forming reaction steps
[0030] Put 100 moles of gluconic acid, 1500 moles of water, 55 moles of zinc oxide, and 2 moles of formic acid into a 100-liter reactor with a heating device, electric stirring, and a thermometer. After reacting for 6 hours, the heating was stopped, and the salt-forming reaction was completed.
[0031] ⑵Drying steps
[0032] The granular product obtained by centrifugation is dried in a drying box with upper and lower air-permeable stainless steel drying sieves. After 24 hours, the obtained product is sieved to obtain a finished product with a zinc content greater than 15%.
Embodiment 2
[0034] A preparation method for zinc gluconate, comprising the following steps:
[0035] ⑴Salt-forming reaction steps
[0036] Put 100 moles of gluconic acid, 1500 moles of water, 55 moles of zinc oxide, and 3 moles of formic acid into a 100-liter reactor with a heating device, electric stirring, and a thermometer. After reacting for 6 hours, the heating was stopped, and the salt-forming reaction was completed.
[0037] ⑵Drying steps
[0038] The granular product obtained by centrifugation is dried in a drying box with upper and lower air-permeable stainless steel drying sieves. After 24 hours, the obtained product is sieved to obtain a finished product with a zinc content greater than 15%.
Embodiment 3
[0040] A preparation method for zinc gluconate, comprising the following steps:
[0041] ⑴Salt-forming reaction steps
[0042] Put 100 moles of gluconic acid, 1500 moles of water, 55 moles of zinc oxide, and 4 moles of formic acid into a 100-liter reactor with a heating device, electric stirring, and a thermometer. After reacting for 6 hours, the heating was stopped, and the salt-forming reaction was completed.
[0043] ⑵Drying steps
[0044] The granular product obtained by centrifugation is dried in a drying box with upper and lower air-permeable stainless steel drying sieves. After 24 hours, the obtained product is sieved to obtain a finished product with a zinc content greater than 15%.
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Abstract
The invention relates to a method for preparing zinc gluconate. The method comprises the following steps of (1) conducting a salt-forming reaction step, namely putting gluconic acid, zinc oxide, initiator and water into a reaction kettle, conducting stirring and a heating reaction to spill out carbon dioxide and generate zinc gluconate; and (2) conducting a drying step, namely drying the granular product which is obtained by separation in a drying screen which is ventilated from top to bottom, and screening the obtained product to obtain the zinc gluconate. According to the preparation method, in the material charging step, the gluconic acid is used to replace sodium gluconate, and zinc oxide is used to replace zinc sulfate, so that only zinc gluconate is obtained. The single granular product zinc gluconate has high purity, can be easily dried after being separated, so that the risk of spontaneous combustion is cleared, the prepared product is not needed to be ground, and massive dust can be avoided.
Description
technical field [0001] The invention belongs to the field of organic compound preparation, in particular to a simple and effective preparation method of zinc gluconate. Background technique [0002] Among organic mineral additives for animal feed, zinc gluconate, as an organic zinc mineral additive, has attracted more and more attention and has broad application prospects. [0003] The usual production method of zinc gluconate is to utilize sodium gluconate to react with zinc sulfate, and the product obtained is a viscous substance, which is difficult to further process and difficult to sell. The problems in this type of preparation method: 1. In the further processing step, drying The air permeability is not good, the moisture evaporates slowly, it is not easy to dry, and it is easy to smolder, which is very dangerous. It is necessary to increase the automatic turning equipment. There are many equipments, the complex production cost is high, and it is difficult to reduce th...
Claims
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Application Information
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