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Production method of diammonium hydrogen citrate

A technology of diammonium hydrogen citrate and its production method, which is applied in chemical instruments and methods, separation/purification of carboxylic acid compounds, preparation of carboxylate, etc., can solve complex production process of diammonium hydrogen citrate, increase production cost, Problems such as narrow scope of application, to achieve the effect of simple and scientific production process, good product quality and reduced production cost

Inactive Publication Date: 2015-01-28
NINGXIANG XINYANG CHEM
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Problems solved by technology

Under the influence of the general environment of my country's citric acid industry, the production process of diammonium hydrogen citrate is relatively complicated, resulting in serious waste of raw materials, greatly increasing production costs, and its scope of application is narrow

Method used

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  • Production method of diammonium hydrogen citrate

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Embodiment Construction

[0018] refer to figure 1 , the present embodiment adopts the following technical scheme: its production process is:

[0019] (1), inject a certain volume of purified water into the reactor, and start stirring;

[0020] (2) Add clean citric acid to make an acid solution of about 50%, open the steam valve, and heat up to about 50°C to fully dissolve the acid;

[0021] (3), open the liquid ammonia valve, slowly feed liquid ammonia into the reactor;

[0022] (4), the reaction releases a large amount of heat, and the flow and speed are controlled so that the temperature does not exceed 75°C;

[0023] (5), adjust PH4.5-5.5, reach reaction terminal point, open cooling water valve and cool down;

[0024] (6) When the temperature drops below 30°C, a large amount of crystals are precipitated, and centrifugation begins;

[0025] (7), the separated solid is dried through a vibrating fluidized bed, and the mother liquor is recycled;

[0026] (8), pack after sub-sieving.

[0027] The ...

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Abstract

The invention discloses a production method of diammonium hydrogen citrate and relates to the technical field of production processes of chemical raw materials. The production method comprises the following steps: filling a reaction kettle with purified water taking up a certain volume of a tank body, and stirring; adding clean citric acid to prepare a 40%-60% acid solution, opening a steam valve, and heating to 40-60 DEG C for fully dissolving acid; opening a liquid ammonia valve, and slowly filling the reaction kettle with liquid ammonia; when a large amount of heat is released in reaction, controlling the flow quantity and the speed, and enabling the temperature to not exceed 75 DEG C; adjusting the pH value to be 4.5-5.5, and opening a cooling water valve for cooling when a reaction end point is reached; cooling to less than 30 DEG C, and performing centrifugal separation when a large amount of crystals are separated out; drying separated solids through a vibrated fluidized bed, and recycling mother liquid. The production method is simple, scientific and easy for large-batch production; moreover, raw materials cannot be wasted in the production process, the production cost is reduced, the product quality is good, and the application range is extended.

Description

Technical field: [0001] The invention relates to the technical field of production technology of chemical raw materials, in particular to a production method of diammonium hydrogen citrate. Background technique: [0002] The total annual output of citric acid in my country ranks first in the world, and the products have certain competitiveness in the international market. my country's submerged fermentation technology using dried potato as raw material is original, and its fermentation index is in the forefront of the world, but the extraction process and equipment are relatively backward, and there are few in-depth product developments. In recent years, due to the rapid growth of production capacity and export volume of my country's citric acid industry, relatively lagging technical innovation, and fierce competition in the international market, there has been a serious situation of oversupply, and the utilization rate of equipment is less than 60%. Benefits are on the decl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C59/265C07C51/41
CPCC07C51/412C07C51/42C07C51/43
Inventor 石志勇
Owner NINGXIANG XINYANG CHEM
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