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Production method of disodium dihydrogen pyrophosphate with high gas generation rate

A technology of disodium dihydrogen pyrophosphate and sodium dihydrogen phosphate, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve problems such as production difficulties of disodium dihydrogen pyrophosphate, and achieve good stability and ROR The effect of small changes

Inactive Publication Date: 2014-10-15
XUZHOU COLLEGE OF INDAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the production of disodium dihydrogen pyrophosphate with low gas generation rate and high gas generation rate is relatively difficult
Existing patent No. is 201010584116 the production method of the disodium dihydrogen pyrophosphate of low gas generation speed, the production method of high gas generation speed has not yet been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Put 2000kg of food-grade phosphoric acid with a content of 78% and 2052kg of ion-exchange membrane sodium hydroxide with a content of 31% into the neutralization tank at the same time, and then put in 1.5kg of ion-exchange membrane potassium hydroxide with a content of 90%. After adding the neutralization reaction near the end, use the above-mentioned phosphoric acid or sodium hydroxide to fine-tune the pH value, so that the pH of the neutralization solution (sample diluted to 1% sodium dihydrogen phosphate) is 4.2. Use water to adjust the specific gravity of the neutralizing solution to 1.29. Put the neutralizing solution into the spray drying tower, the temperature at the bottom of the tower is 150°C, and the exported sodium dihydrogen phosphate product contains 8.2% crystal water. Send sodium dihydrogen phosphate into the drum-type polymerization furnace with a lifting plate on the inner wall. The polymerization temperature is 220-230°C. The silver solution test ort...

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PUM

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Abstract

The invention relates to a method for producing disodium dihydrogen pyrophosphate, in particular to a method for producing disodium dihydrogen pyrophosphate with high gas evolution rate. Phosphoric acid and sodium hydroxide are neutralized, and potassium hydroxide is added in the neutralization stage, the pH of the neutralization solution is fine-tuned with phosphoric acid or sodium hydroxide, and the specific gravity is controlled, and then the neutralization solution is spray-dried to obtain dihydrogen phosphate after drying. The sodium powder particles are sent to a barrel polymerization furnace for polymerization, and cooled to obtain disodium dihydrogen pyrophosphate with a high gas evolution rate. The disodium dihydrogen pyrophosphate produced by this method has a gas rate ROR of 36-42. As the acid salt component in the composite leavening agent, the ROR changes little during the shelf life and has good stability.

Description

technical field [0001] The invention relates to a production method of disodium dihydrogen pyrophosphate, in particular to a production method of disodium dihydrogen pyrophosphate with a high gas generation rate. Background technique [0002] Disodium dihydrogen pyrophosphate, referred to as SAPP, can be used as a rapid leavening agent, quality improver, leavening agent, buffering agent, etc. in food processing, and is often used as an acidic component of synthetic leavening agents such as bread and cakes. Foods such as bread, cakes, and steamed buns are characterized by a spongy porous structure to produce a soft taste. For this purpose, a sufficient amount of gas must be maintained in the dough. Most of the required gas is provided by the leavening agent. Commonly used composite leavening agents use NaHCO3 and acid salts to generate CO2 gas. Sodium acid pyrophosphate is a widely used acid salt, which is suitable for a variety of baked and fried foods. The gas productio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/42
Inventor 张晓红王德堂彭德厚
Owner XUZHOU COLLEGE OF INDAL TECH
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