Gamma-Aminobutyric Acid Crystalline Form Preparation
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Solution Overview
Problem
Current methods for preparing γ-aminobutyric acid result in crystalline forms with low purity, uneven particle size distribution, low bulk density, poor flowability, and high energy consumption, making them unsuitable for large-scale industrial production and prone to moisture absorption and agglomeration.
Innovation Solution
A new crystalline form of γ-aminobutyric acid is produced using a method involving the preparation of a solution with an additive, such as sodium acetate or potassium acetate, followed by evaporation under reduced pressure and subsequent drying, which controls crystal nucleation and results in a conical-block-shaped product with uniform particle size and high bulk density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If evaporative concentration method is used to prepare γ-aminobutyric acid, then the product can be obtained through simple process steps, but the crystal morphology becomes needle-shaped or sheet-shaped with low bulk density and poor flowability
Solution Approach 1:
The invention changes the concentration method from evaporative concentration to vacuum concentration, and adds a natural cooling step. These parameter changes transform the crystal morphology from needle-shaped/sheet-shaped to powder-shaped, improving bulk density and flowability while maintaining process simplicity
Solution Approach 2:
The invention introduces a periodic action by naturally cooling the concentrated solution for 1-1.5 hours at atmospheric pressure after vacuum concentration. This periodic cooling step allows controlled crystal formation, resulting in uniform powder-shaped particles with better flowability and bulk density
2Productivity
If three-effect concentration and direct condensation-crystallization method is used, then the preparation process can be completed in fewer steps, but the product easily absorbs moisture and agglomerates into clumps
Solution Approach 1:
The invention changes the crystallization conditions by naturally cooling the concentrated solution at atmospheric pressure for 1-1.5 hours instead of direct condensation. This parameter change produces powder-shaped crystals with lower surface energy, reducing their tendency to absorb moisture and agglomerate, thereby improving stability while maintaining high preparation efficiency
3Ease of manufacture
If conventional preparation methods are used, then the process can be implemented with standard equipment, but the energy consumption is high and the yield is low
Solution Approach 1:
The invention utilizes phase transition by concentrating the fermentation broth under vacuum and then naturally cooling it at atmospheric pressure. This two-stage phase transition approach (vacuum concentration followed by atmospheric cooling) reduces energy consumption compared to continuous high-temperature evaporation, while maintaining compatibility with standard equipment and achieving high yield
4Manufacturing precision
If chemical reagents are used in the preparation process, then the crystallization can be enhanced, but harm is posed to human body and the environment
Solution Approach 1:
The invention extracts and eliminates the need for harmful chemical reagents by using purely physical methods: vacuum concentration followed by natural cooling crystallization. This extraction of chemical additives maintains effective crystallization control through physical parameter control (temperature, pressure, time) while eliminating environmental and health hazards
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 new method yields γ-aminobutyric acid with improved stability, preventing moisture absorption and agglomeration, and enhancing flowability and bulk density, while being economically and environmentally friendly, suitable for large-scale industrial production.
Implementation Method 1
evaporating water from the product of S1 under reduced pressure and at 50-80° C.
Implementation Method 2
the fermentation broth is evaporated to a certain degree under three different temperature conditions, and then transferred into a vacuum concentration crystallizer
Implementation Method 3
concentrated to obtain the crystals; finally, the crystals are naturally cooled at atmospheric pressure for 1 to 1.5 hours to obtain γ-aminobutyric acid
Implementation Method 4
the crystals are naturally cooled at atmospheric pressure for 1 to 1.5 hours
Implementation Method 5
obtaining a wet product by filtering the suspension; drying the wet product to obtain the new crystalline form of γ-aminobutyric acid
Data Source
AI summary
A method for preparing a new crystalline form of γ-aminobutyric acid, including the steps of: S1: preparing a γ-aminobutyric acid solution at an initial concentration of 0.5-1.0 g/mL by adding crude γ-aminobutyric acid to water; adding an additive to the γ-aminobutyric acid solution, raising the temperature to 50-80° C., stirring to produce a clear solution; and S2: obtaining a suspension by evaporating water from the product of S1 under reduced pressure and at 50-80° C.; obtaining a wet product by filtering the suspension; drying the wet product to obtain the new crystalline form of γ-aminobutyric acid. The preparation method of the new crystalline form of γ-aminobutyric acid is simple, easy to operate, low in energy consumption, economical and environmentally friendly. It is suitable for large-scale industrial production.