Method for using dried potato flour to prepare potassium citrate

A technology of potassium citrate and dried potato powder, applied in microorganism-based methods, biochemical equipment and methods, microorganisms and other directions, can solve the problems of no practical production significance, high production cost, large environmental pollution, etc., and achieves low production cost, The effect of short production process and less environmental pollution

Inactive Publication Date: 2010-04-14
HUNAN DONGTING CITRIC ACID CHEMICALS CO LTD
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Problems solved by technology

This method has a long process flow, high environmental pollution, and too much waste. I

Method used

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Embodiment Construction

[0006] The present invention will be further described according to specific embodiments below:

[0007] (1) Crush the dry and non-mold dried sweet potato or cassava into 60-80 meshes, mix potato flour: water 1: (4-5) into a paste, and transport it to the fermenter with a pump. Add 20 milliliters of 20,000 units of liquid amylase and 0.6 kilograms of ammonium sulfate to add a fermentation accelerator; (2) heat up to 85°C and keep it warm for 30 minutes. After sterilizing and cooling down to 39°C, add citric acid fermentation strain Aspergillus niger and ferment for about 55-60 hours to prepare a mixture containing 10%-15% citric acid and dried potato residue. (3) After the mixture is heated to 70-80°C, it is quickly transported to a plate-and-frame filter press with a mud pump, and the citric acid-containing fermentation liquid of the dried potato residue is separated. (4) After the fermented liquid containing citric acid is pumped into the neutralization tank through the pip...

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Abstract

The invention discloses a method for using dried potato flour to prepare potassium citrate, comprising the following steps of grinding dried sweet potatoes or tapioca chips into 60 to 80 class, making into a pasty mixture according to a proportion of 1: 4 to 5 of flour and water, pumping the mixture into a fermentation tank, adding amylase and ammonium sulphate into the fermentation tank, liquefying the starch by rising temperature, lowering the temperature to 39 degrees after sterilization and disinfection, adding aspergillus niger that is a fermenting culture of citric acid to implement fermentation for 55 to 60 hours, heating the mixture to 70 to 80 degrees, getting fermentation liquor containing citric acid through separation, adding the aspergillus niger into the fermentation tank to implement fermentation after liquidation, sterilization and disinfection through rising temperature, and using the fermented fermentation liquor containing citric acid to prepare calcium citrate by a method of 'calcium salts' and further to prepare potassium citrate through adding potassium carbonate. Compared with the method for preparing potassium citrate through the reaction of finished citric acid and potassium hydrate, the invention directly extracts potassium citrate from the fermentation liquor, has the advantages of low production cost, high economic profit, short flow of production, less production waste and less environmental pollution, and can reduce the production cost by 20 to 30 percent.

Description

technical field [0001] The invention relates to a method for preparing potassium citrate by using dried sweet potatoes or dried cassava as raw materials. Background technique [0002] The usual method for preparing potassium citrate is: dried potato→crushing→pulping→fermentation→pressing→neutralization→acidolysis→separation→concentration→crystallization→drying to produce citric acid, and then citric acid and potassium hydroxide Or potassium carbonate is used as a raw material to produce potassium citrate through processes such as neutralization→decolorization→impurity removal→concentration→crystallization→drying by simple neutralization reaction. This kind of method has a long technological process, relatively large environmental pollution, and too much waste. In addition, the production cost is too high and has no practical production significance. Contents of the invention [0003] The purpose of the present invention is to provide a method for producing potassium citra...

Claims

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Application Information

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IPC IPC(8): C12P7/48C07C59/265C07C51/41C12R1/685
Inventor 黄果成
Owner HUNAN DONGTING CITRIC ACID CHEMICALS CO LTD
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