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Glutamic acid crystallization method for preventing and controlling Beta-type crystal from occurring and application thereof

A technology of glutamic acid and glutamic acid, applied in chemical instruments and methods, cyanide reaction preparation, preparation of organic compounds, etc., can solve the problems of inability to take, large loss, unstable glutamic acid crystallization, etc., and achieves simple operation. , the effect of improving the extraction rate

Active Publication Date: 2012-07-18
重庆飞亚实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current control of glutamic acid crystallization is unstable, and there are many reasons for light glutamate, such as: operational factors, fermentation broth quality, sugar solution quality, etc.
Many companies cannot effectively foresee the appearance of β-type crystals, and cannot take effective control methods. More is the reprocessing after the appearance of β-type crystals, which has a great impact on product quality and glutamic acid extraction yield. Negative impacts, and even many companies have to face long-term production reduction or shutdown due to the emergence of light gluten acid, resulting in huge losses

Method used

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  • Glutamic acid crystallization method for preventing and controlling Beta-type crystal from occurring and application thereof
  • Glutamic acid crystallization method for preventing and controlling Beta-type crystal from occurring and application thereof
  • Glutamic acid crystallization method for preventing and controlling Beta-type crystal from occurring and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of the α-type crystal suspension as the seed crystal bottom material, such as figure 2 shown

[0031] ① At 20°C, adjust the pH value of the glutamic acid fermentation broth with sulfuric acid until crystal nuclei appear, stop adjusting the pH value, and incubate the crystals for 1 hour;

[0032] ② Continue to use sulfuric acid to adjust the pH value of the glutamic acid fermentation broth to 3.5, keep the temperature at 15°C, and incubate the crystal for 0.5h;

[0033] ③Continue to use sulfuric acid to adjust the pH value of the glutamic acid fermentation liquid to 3.0, keep the temperature at 15° C., and cultivate the crystals for 5 hours; 10 × 40 microscope inspection, the crystals are only α-type crystals in the α-type crystal suspension;

[0034] (2) Control and adjust the formation of glutamic acid crystals

[0035] ① The glutamic acid fermentation liquid freshly put in the tank is concentrated by a four-effect decompression evaporator to obtain ...

Embodiment 2

[0039] (1) Preparation of the α-type crystal suspension as the seed crystal bottom material, such as figure 2 shown

[0040] ① At 25°C, adjust the pH value of the glutamic acid fermentation broth with sulfuric acid until crystal nuclei appear, stop adjusting the pH value, and incubate the crystals for 2 hours;

[0041] ② Continue to use sulfuric acid to adjust the pH value of the glutamic acid fermentation broth to 4.0, keep the temperature at 15°C, and incubate the crystal for 1 hour.

[0042] ③Continue to use sulfuric acid to adjust the pH value of the glutamic acid fermentation broth to 3.5, keep the temperature at 20°C, and grow the crystals for 10 hours; check with a 10*40 microscope to obtain an α-type crystal suspension in which the crystals are only α-type crystals;

[0043] (2) Control and adjust the formation of glutamic acid crystals

[0044] ① The glutamic acid fermentation liquid freshly put in the tank is concentrated by a four-effect decompression evaporator ...

Embodiment 3

[0048] (1) Preparation of the α-type crystal suspension as the seed crystal bottom material, such as figure 2 shown

[0049] ① At 23°C, use sulfuric acid to adjust the pH value of the glutamic acid fermentation broth until crystal nuclei appear, stop adjusting the pH value, and incubate the crystals for 3 hours;

[0050] ② Continue to use sulfuric acid to adjust the pH value of the glutamic acid fermentation broth to 4.0, keep the temperature at 20°C, and incubate the crystals for 2 hours.

[0051] ③Continue to use sulfuric acid to adjust the pH value of the glutamic acid fermentation broth to 3, keep the temperature at 15°C, and grow the crystals for 15 hours; 10*40 microscope inspection, the crystals are only α-type crystals in the α-type crystal suspension;

[0052] (2) Control and adjust the formation of glutamic acid crystals

[0053] ① The glutamic acid fermentation liquid freshly put in the tank is concentrated by a four-effect decompression evaporator to obtain a gl...

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Abstract

The invention discloses a glutamic acid crystallization method for preventing and controlling Beta-type crystal from occurring and application thereof. In the invention, pure Alpha-type crystal suspending liquid is prepared as a seed crystal backing material, the glutamic acid content in supernate of the crystal suspending liquid is then measured on time, and the occurrence of the Beta-type crystal is effectively stopped by utilizing the sudden change of the content and taking relevant control measures, such as culturing crystal, accelerating regulating stream, or the like in time, therefore,the extraction ratio of the glutamic acid crystal is effectively improved. The invention not only has simple operation, but also greatly reduces the occurrence possibility of the Beta-type crystal during the crystallization of the glutamic acid, effectively improves the extraction ratio of the glutamic acid crystal, and promotes the benefit increase of enterprises.

Description

technical field [0001] The invention belongs to the field of food, and in particular relates to a crystallization method and application of glutamic acid for preventing and controlling the occurrence of light glutamic acid. Background technique [0002] As we all know, glutamic acid crystals have various properties, and different crystal forms of glutamic acid crystals will be formed under different conditions, which can be divided into α-type crystals and β-type crystals. Among them, the α-type crystal is rhombohedral crystal, which is an ideal crystal for isoelectric point extraction. This crystal has high purity, large particles, heavy weight, easy precipitation, easy separation from mother liquor, and high extraction yield. The β-type crystal is powdery or needle-like, scale-like, fine grain, low purity, crystal luster, light weight, difficult to precipitate, very difficult to separate from the mother liquor, and low extraction yield. This kind of crystal is often called...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C229/24C07C227/42
Inventor 李平凡邱玉美朱晓立张银冰聂青玉杨佐毅
Owner 重庆飞亚实业有限公司
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