Glutamic acid rotating crystal method

A technology of glutamic acid and crystals, which is applied in the field of crystal transformation from α-glutamic acid to β-glutamic acid, which can solve the problems of crystal light transmission and low purity, unstable transformation quality, and low yield. Achieve the effects of reducing dissolution and pyroglutamic acid production, reducing damage, and improving quality and yield

Active Publication Date: 2009-10-07
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, because there is no glutenic acid washing process in the existing transformation process, first, the transformation speed is slow, the transformation quality is unstable, and the light transmission and purity of the transformed crystals are relatively low. Second, the transformation yield is also low.

Method used

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  • Glutamic acid rotating crystal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: Transcrystal technological process such as figure 1 shown

[0020] (1) Add water to the α-glutamic acid crystals, make a suspension of α-glutamic acid crystals with a mass volume percent concentration (w / v) of 40% under stirring conditions, and adjust the pH to 5.5;

[0021] (2) Continuously pump the suspension obtained in step (1) into the jet heater to heat up to 55°C, then enter the heat preservation tank for heat preservation and washing, and keep heat for 4 hours under the condition of 60rpm / min stirring speed ;

[0022] (3) pump into decanter centrifuge after heat preservation finishes, adopt the rotating speed of 2500rpm / min to carry out centrifugation and obtain glutamic acid;

[0023] (4) Mix the glutamic acid obtained in step (3) with distilled water to make a glutamic acid suspension with a mass volume percentage concentration (w / v) of 40%; add sodium hydroxide to make the glutamic acid suspension in the glutamic acid suspension The sodium io...

Embodiment 2

[0026] Embodiment 2: Transcrystal process flow such as figure 1 shown

[0027] (1) Add water to the α-glutamic acid crystals, make a suspension of α-glutamic acid crystals with a mass volume percent concentration (w / v) of 65% under stirring conditions, and adjust the pH to 4.0;

[0028] (2) Continuously pump the suspension obtained in step (1) into the jet heater to heat up to 85°C, then enter the heat preservation tank for heat preservation and washing, and keep heat for 1 hour under the condition of 60rpm / min stirring speed ;

[0029] (3) pump into decanter centrifuge after heat preservation finishes, adopt the rotating speed of 4500rpm / min to carry out centrifugation and obtain glutamic acid;

[0030] (4) step (3) gained glutamic acid is mixed with distilled water, the glutamic acid suspension that makes mass volume percent concentration (w / v) is 40%; Add monosodium glutamate mother liquor (the mass volume of sodium glutamate in monosodium glutamate mother liquor) The pe...

Embodiment 3

[0033] Embodiment 3: Transcrystal process flow such as figure 1 shown

[0034] (1) Add water to the α-glutamic acid crystals, make a suspension of α-glutamic acid crystals with a mass volume percent concentration (w / v) of 45% under stirring conditions, and adjust the pH to 5.0;

[0035] (2) Continuously pump the suspension obtained in step (1) into the jet heater to heat up to 75°C, then enter the heat preservation tank for heat preservation and washing, and keep heat for 3 hours at a stirring speed of 100rpm / min ;

[0036] (3) pump into decanter centrifuge after heat preservation finishes, adopt the rotating speed of 3500rpm / min to carry out centrifugation and obtain glutamic acid;

[0037] (4) mixing the glutamic acid obtained in step (3) with distilled water to make a glutamic acid suspension with a mass volume percentage concentration (w / v) of 65%; adding sodium hydroxide to make the glutamic acid suspension The sodium ion concentration is controlled at a mass volume pe...

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Abstract

The present invention discloses a glutamic acid rotating crystal method. the method includes following steps: adding transformation mother liquor to alpha-glutamic acid crystal to make crystal suspension; heating up to 55-85 DEG, washing water, agitating, thermal insulation; centrifugal separation to obtain glutamic acid; mixing glutamic acid and water to make glutamic acid suspension; adding sodium hydroxide or gourment powder mother liquor, controlling sodion concentration as 0.2-2.0% in volume percent concentration, heating up to 70-95 DEG, rotating crystal for 0.5-3 hours; cool down, agitation for producing crystal. Technics of the invention is simple, which greatly improved crystal rotating speed and glutamic acid purity; reducing loss of crystal, reducing dosage of sodion and transformation temperature, reducing dissolution of the glutamic acid and generation of the pyroglutamic acid, improving products quality and yield; saving a great amount of processing cost for gourment powder refining, and reducing consumption of electric, water, vapor and generation of sewerage in gourment powder production.

Description

technical field [0001] The invention belongs to the field of food biology, and in particular relates to a method for transforming alpha-glutamic acid into beta-glutamic acid. Background technique [0002] The traditional extraction process of glutamic acid adopts the isoelectric point low-temperature extraction process. The glutamic acid crystals prepared in this process are α-type. The light transmission of glutamic acid is generally 10-50%, the water content is 15-35%, and the purity is 60%. ~85%. If this glutenic acid is directly neutralized with alkali, the obtained neutralizing solution is all very poor in terms of color and purity of monosodium glutamate, which brings considerable cost input to the refining of monosodium glutamate. If this α-glutamic acid is transformed into β-glutamic acid through certain process control, the impurities will be released from the glutenic acid crystals during the transformation process and a part will be dissolved in the solution. Aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C229/24C07C227/42A23L1/228A23L27/22
Inventor 李平凡邱玉美朱晓立张银冰聂青玉
Owner 重庆飞亚实业有限公司
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