Methionine Recovery System for Yield Optimization
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Solution Overview
Problem
Methionine yield loss occurs during handling of wet cake and powdered cake in steps following crystallization in methionine production, as fine powder methionine is not recoverable and is discharged as waste.
Innovation Solution
Recovering waste methionine by adding it back to the reaction solution after hydrolysis, specifically including steps of solid-liquid separation, drying, sieving, and packaging, to reduce losses and improve yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If methionine is precipitated by introducing carbon dioxide into the reaction solution, then methionine can be separated from the reaction solution, but fine powder methionine is generated and lost during subsequent handling steps
Solution Approach 1:
The patent recovers fine powder methionine that would otherwise be discarded as waste during handling steps. The recovered fine powder is dissolved in water to prepare a recovery solution, which is then added back to the precipitated methionine to incorporate the lost substance into the final product.
Solution Approach 2:
Water is used as an intermediary solvent to dissolve the fine powder methionine, creating a recovery solution that can be easily mixed with and incorporated into the precipitated methionine, thereby recovering the lost substance without direct handling of the fine powder.
2Ease of manufacture
If fine powder methionine is discharged as waste without recovery, then handling complexity is reduced, but methionine yield loss increases
Solution Approach 1:
Instead of simply discarding fine powder methionine to maintain handling simplicity, the patent implements a recovery system where the fine powder is collected, dissolved in water, and reincorporated into the product, thereby reducing yield loss while adding a straightforward recovery step.
Solution Approach 2:
The fine powder methionine serves its own purpose by being recovered and reincorporated into the final product rather than being discarded, allowing the process to utilize its own byproduct and reduce overall material loss.
3Quantity of substance
If waste methionine is recovered and added back to the reaction solution, then methionine yield is improved, but process complexity increases
Solution Approach 1:
The patent implements a recovery system where waste fine powder methionine is collected, dissolved in water, and added back to the precipitated methionine. This straightforward recovery and reincorporation process improves yield without requiring complex additional equipment or multi-step procedures.
Solution Approach 2:
Water serves as a simple intermediary medium to dissolve and transport the recovered fine powder methionine back into the product, avoiding the need for complex recovery systems while effectively reducing material loss.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method enables the recovery of waste methionine, reducing production losses and enhancing the overall yield of methionine to meet product standards.
Implementation Method 1
carbon dioxide is introduced into a reaction solution resulting from hydrolysis of 5-[2-(methylthio)ethyl] imidazolidine-2,4-dione to precipitate out methionine
Implementation Method 2
hydrolysis of 5-[2-(methylthio)ethyl] imidazolidine-2,4-dione
Data Source
Figure 1
AI summary
The present provides a method for producing methionine which is characterized by a crystallization step in which carbon dioxide is introduced into a reaction solution containing an alkali salt of methionine which is obtained by hydrolyzing 5-[2-(methylthio)ethyl] imidazoline-2,4-dione in the presence of an alkali compound, thereby precipitating the methionine, and further comprises a step of adding waste methionine to the reaction solution. The method of production of the present invention can improve a yield in the production of methionine.