A continuance method for preparing succinic acid

A succinate and inorganic acid technology, applied in the preparation of carboxylate, organic chemistry and other directions, can solve the problems of high consumption of auxiliary materials, high impurity content, large energy consumption, etc., and achieve good product quality, high crystallization yield, The effect of low consumption of excipients

Active Publication Date: 2009-10-07
ANHUI BBCA FERMENTATION TECH ENG RES
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional reaction and crystallization of succinate with inorganic acid are all carried out in batches, and the crystals produced are small, with large specific surface area and high impurity content, resulting in low yield of succinic acid, poor product quality, high consumption of excipients, Large energy consumption and other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The method for continuously preparing succinic acid from magnesium succinate, comprises the steps:

[0026] 1. earlier with 2 cubic meters of succinic acid concentration is 6% magnesium succinate fermented liquor 70 ℃ with molecular weight cut-off be the ceramic membrane filtration of 150KD, obtain 2.15 cubic concentration and be 5.5% supernatant.

[0027] 2. After the supernatant is concentrated to 10% by RO membrane, it is concentrated to 30% by thermal evaporation system.

[0028] 3. The concentrated solution with a concentration of 30% and concentrated hydrochloric acid are added to the first-stage reactor to react at the same time, the reaction temperature is 40°C, and the pH is controlled to be 3; when the volume of the solution in the first-stage reactor reaches 50% of the container volume, the material will The primary reactor discharges to the secondary reactor, and the discharge rate is controlled to keep the liquid level of the primary reactor unchanged.

[...

Embodiment 2

[0033] The method for continuously preparing succinic acid from succinate comprises the steps:

[0034] 1. With 2 cubic meters of succinic acid concentration of 6% fermented liquid containing magnesium succinate and sodium succinate, filter it with a ceramic membrane with a molecular weight cut-off of 300KD at 70°C to obtain 2.14 cubic meters of 5.5% concentration Serum.

[0035] 2. After the supernatant is concentrated to 12% by RO membrane, it is concentrated to 30% by thermal evaporation system.

[0036] 3. The concentrated solution with a concentration of 30% and concentrated sulfuric acid are added to the first-stage reactor to react at the same time, the reaction temperature is 50°C, and the pH is controlled to be 3.5; when the volume of the solution in the first-stage reactor reaches 70% of the container volume, the material will The primary reactor discharges to the secondary reactor, and the discharge rate is controlled to keep the liquid level of the primary reactor...

Embodiment 3

[0041] The method for continuously preparing succinic acid from succinate comprises the steps:

[0042] 1. With 2 cubic meters of succinic acid concentration of 6% fermentation broth containing magnesium succinate and ammonium succinate, filter it with a ceramic membrane with a molecular weight cut-off of 150KD at 75°C to obtain 2.14 cubic meters of 5.5% concentration Serum.

[0043] 2. After the supernatant is concentrated to 10% by RO membrane, it is concentrated to 35% by thermal evaporation system.

[0044] 3. The concentrated solution with a concentration of 30% and concentrated nitric acid are added to the first-stage reactor to react at the same time, the reaction temperature is 60°C, and the pH is controlled at 4.5; The primary reactor discharges to the secondary reactor, and the discharge rate is controlled to keep the liquid level of the primary reactor unchanged.

[0045] 4. Add concentrated nitric acid into the secondary reactor, control the reaction pH=3.0, and ...

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Abstract

The present invention provides a continuance method for preparing succinic acid includes following steps: adding succinate and inorganic acid into a first level reactor and reacting at a controlled temperature 30 to 95 DEG, and PH 1 to 5, then the reaction product overflowing to a second level reactor, adding succinate and inorganic acid into the second reactor and controlling the temperature at 10 to 80 DEG and PH 0.5 to 4, and then the second reaction product overflowing to a third reactor, adding succinate and inorganic acid into the reactor and controlling the temperature at 0 to 90 DEG and PH 1.5 to 2.5, then the third reactor discharging products into a solid-liquid separation device to obtain the succinate. The method is provided with advantages of high yield, good product quality and low energy consumption.

Description

technical field [0001] The invention relates to the field of food chemical industry, in particular to a method for preparing succinic acid by continuously performing reaction and cooling crystallization. Background technique [0002] Succinic acid, also known as succinic acid, is a binary organic acid. It is an important C4 platform compound and can be used as an intermediate in the synthesis of complex organic compounds. It is widely used in pharmaceuticals, food processing, synthetic plastics, rubber, Protective coatings, dyes and other industries. [0003] At present, the traditional reaction and crystallization of succinate with inorganic acid are all carried out in batches, and the crystals produced are small, with large specific surface area and high impurity content, resulting in low yield of succinic acid, poor product quality, high consumption of excipients, Energy consumption and other issues. [0004] Therefore, it is necessary to find a succinate reaction cryst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C55/10C07C51/02
Inventor 李荣杰尚海涛潘声龙
Owner ANHUI BBCA FERMENTATION TECH ENG RES
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