N,N-Dimethyl Glycinate Salt Drying Process
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Solution Overview
Problem
N,N-dimethyl glycinate salt used in animal feed is hygroscopic and difficult to obtain in a stable, dust-free, free-flowable form, which is essential for industrial manufacturing and storage, as it is typically produced via processes requiring strong bases and results in an aqueous solution or dispersion that needs to be converted into a dry, solid product.
Innovation Solution
A process involving a fluidized bed dryer where the alkali metal salt of N,N-dimethyl glycinate is subjected to a heat treatment with a drying gas stream, with a solution or dispersion of the salt being sprayed onto the composition, maintaining a temperature below 50°C to achieve a stable, dust-free, and free-flowable form with controlled water content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If N,N-dimethyl glycinate salt is completely dried to obtain high purity product, then the composition stability is improved, but the product becomes highly hygroscopic and difficult to handle
Solution Approach 1:
The patent applies parameter changes by controlling the drying process to achieve a specific water content range (0.5-5 wt%) rather than complete drying. This parameter optimization resolves the contradiction by maintaining composition stability while avoiding excessive hygroscopicity that would compromise handling ease.
Solution Approach 2:
The patent employs feedback control through monitoring water content during the drying process and adjusting drying conditions accordingly. This ensures the product achieves stable composition without over-drying, thereby maintaining both composition stability and handling ease.
2Quantity of substance
If conventional drying methods are used to obtain dry product, then the water content is reduced, but energy consumption increases and product quality deteriorates
Solution Approach 1:
The patent changes the drying parameters by using lower temperatures and controlling residence time in the fluidized bed dryer. This approach reduces energy consumption while still achieving the desired water content reduction, resolving the contradiction between water removal efficiency and energy usage.
Solution Approach 2:
The patent replaces conventional high-energy drying methods with a fluidized bed drying system that uses improved heat and mass transfer mechanics. This substitution achieves effective water removal with lower energy input, addressing both water content reduction and energy consumption concerns.
3Quantity of substance
If conventional drying methods are used, then water content is reduced, but the product becomes dusty and poor in flowability
Solution Approach 1:
The patent optimizes drying parameters including temperature, residence time, and fluidization velocity to achieve proper particle formation. These parameter changes ensure adequate water removal while maintaining particle integrity and surface properties that promote good flowability and reduce dusting.
Solution Approach 2:
The patent uses a fluidized bed drying system that employs controlled gas flow to fluidize the particles during drying. This pneumatic approach ensures uniform drying, proper particle coating, and maintains particle morphology that enhances flowability while minimizing dust generation.
4Productivity
If high drying temperature is used to reduce water content quickly, then productivity is improved, but product stability deteriorates
Solution Approach 1:
The patent changes the drying temperature parameter to a moderate range that balances drying speed with product stability. Combined with optimized residence time and fluidization conditions, this achieves adequate productivity while preventing thermal degradation and maintaining product stability.
Solution Approach 2:
The patent employs continuous drying in a fluidized bed system that maintains constant optimal conditions throughout the process. This continuous action at moderate temperature is more efficient than intermittent high-temperature drying, achieving both productivity and stability goals.
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 process effectively produces a stable, free-flowable, and dust-free N,N-dimethyl glycinate salt with a defined water content, suitable for use in animal feed premixes, enhancing handling and storage stability while reducing energy consumption.
Implementation Method 1
subjecting the composition to a heat treatment by contacting the composition in the fluidized bed dryer with a drying gas stream
Implementation Method 2
subjecting the composition to a heat treatment in the fluidized bed dryer by contacting the composition with a drying gas stream, wherein the temperature of the composition in the fluidized bed during the heat treatment does not exceed 50° C.
Implementation Method 3
a solution or dispersion of the composition comprising an alkali metal salt of a compound of general formula (I) or (II) is sprayed onto at least a portion of the composition present in the fluidized bed dryer
Data Source
AI summary
The application relates to a process for drying a composition comprising an alkali metal salt of a compound of general formula (I) R1R2N—CHR3—COOM or formula (II) R1R2N—CHR3CHR3—COOM, in particular N,N-dimethyl glycinate salt, and the use thereof. In the process, the composition, in particular the N,N-di methyl glycinate salt, is dried by feeding the composition into a fluidized bed dryer and subjecting the composition to a heat treatment by contacting the composition in the fluidized bed dryer with a drying gas stream, and during the heat treatment a solution or dispersion of the composition is sprayed onto at least a portion of the composition present in the fluidized bed dryer, or alternatively or in addition the composition, in particular N,N-dimethyl glycinate salt, is fed into a fluidized bed dryer and subjected to heat treatment in the fluidized bed dryer by contacting the composition with a drying gas stream, and the temperature of the composition in the fluidized bed during the heat treatment does not exceed 50° C.