Production device and production method of calcium citrate

Abstract

The invention discloses a production device and a production method of calcium citrate. The production device comprises multi-stage reaction tanks which are connected in series; an agitating device is arranged in a first-grade reaction tank at the first position; the production device is also provided with an air back flushing pipeline which is capable of pumping air into at least one reaction tank of the various-grade reaction tanks following the first-grade reaction tank at the first position. The production method is carried out in the production device, and comprises the steps as follows: continuously introducing calcium carbonate slurry and citric acid fermenting liquor into the first-grade reaction tank of the various-grade reaction tanks under the condition of agitating and generating calcium citrate; continuously introducing the obtained material with pH of 4 to 4.5 and containing calcium citrate into various-grade reaction tanks following the first-grade reaction tank; and pumping air into at least one reaction tank following the first-grade reaction tank through the air back flushing pipeline. With the adoption of the production device and production method disclosed by the invention, additional calcium carbonate added to the reaction tanks following the second-grade reaction tank is not needed; and the obtained calcium citrate has high quality.

Description

technical field [0001] The invention relates to a production device and a production method of calcium citrate, in particular to a production device of calcium citrate and a method for producing calcium citrate using the device. Background technique [0002] With the advancement of biotechnology, the citric acid industry has developed by leaps and bounds, and the world's citric acid production has reached 4 million tons. Citric acid has a wide range of uses, the most important use being in the food industry as a sour agent. In the field of chemistry, citric acid can be used as a reagent for chemical analysis, such as experimental reagents, chromatographic analysis reagents, biochemical reagents, complexing agents, masking agents, and to prepare buffer solutions, etc. (citric acid-sodium citrate buffer can be used for flue gas desulfurization). Adding citric acid to the feed of piglets can wean early, improve the utilization rate of feed by 5-10%, and increase the litter si...

AI Technical Summary

Problems solved by technology

At present, in the continuous neutralization process of calcium citrate, it is necessary to add calcium carbonate and / or calcium hydroxide to the reaction tanks of all levels except the first-level reaction tank to adjust the pH value so that the citric acid in the citric acid fermentation serum Convert to calcium salt precipitation as much as possible, as the continuous neutralization process disclosed in CN101607890A needs to gradually increase the pH by adding calcium carbonate, wherein, because the calcium carbonate added after the reaction is not complete, it will inevitably lead to citric acid The amount of calcium carbonate trapped in calcium products is large

[0005] And in the prior art, stirring devices are all arranged in the reaction tanks of all levels of the calcium citrate production plant used conventionally, but the quality of the calcium citrate obtained is low (the solid-liquid ratio is large and the water content is high), resulting in subsequent Solid-liquid separation is difficult, and the content of citric acid in the liquid phase after the reaction is relatively high (that is, the yield of citric acid is low)

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