N-(Aminoiminomethyl)-2-Aminoacetic Acid Form B for Dust-Free Flow
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Solution Overview
Problem
Existing methods for preparing N-(aminoiminomethyl)-2-aminoacetic acid result in a fine crystalline powder with high dust content, which is unsuitable for use as a feed additive due to poor flowability and dusting, and require additional processing steps and binders, leading to low dissolution rates and mechanical instability.
Innovation Solution
A process involving the crystallization of N-(aminoiminomethyl)-2-aminoacetic acid from water-containing solutions with guanidine compounds to produce a thermodynamically metastable crystal modification (form B), which forms spherical or polygonal aggregates with low dust content and high solubility, eliminating the need for binders and complex equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If N-(aminoiminomethyl)-2-aminoacetic acid is prepared by known crystallization methods, then the product is obtained as a fine crystalline powder, but the product has high dust content and poor flowability
Solution Approach 1:
The invention changes the physical parameters of crystallization by introducing guanidine compounds as additives during the crystallization process. This parameter change transforms the crystal growth pattern from fine needles to spherical aggregates, fundamentally altering the product morphology and flow properties without changing the chemical composition
Solution Approach 2:
Guanidine compounds act as intermediary substances that mediate the crystallization process. These compounds interact with the crystallizing N-(aminoiminomethyl)-2-aminoacetic acid to control crystal growth, forming spherical aggregates with reduced dust content and improved flowability while maintaining product purity
2Ease of operation
If polymeric binders are added to improve flowability, then the product becomes less dusty, but the dissolution rate decreases and the process requires complex equipment
Solution Approach 1:
The invention extracts and eliminates the need for polymeric binders from the process. By using guanidine compounds during crystallization to form spherical aggregates inherently, the harmful addition of binders is removed, preserving both flowability and dissolution rate without requiring extrusion or granulation equipment
Solution Approach 2:
The crystallization process itself is modified to self-generate the desired spherical aggregate morphology through guanidine compound mediation. The system serves its own flowability needs through controlled crystal growth rather than requiring post-processing binding and granulation steps
3Productivity
If granules are produced with low binder content to maintain dissolution rate, then the dissolution rate is preserved, but the granules have low strength and high abrasion values
Solution Approach 1:
The invention performs preliminary action by controlling the crystal growth morphology during the crystallization process itself. Spherical aggregates with appropriate mechanical strength are formed in advance through guanidine compound mediation, eliminating the need for subsequent granulation that would compromise strength at low binder contents
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 metastable crystal form B provides a free-flowing, dust-free product with enhanced dissolution rates and increased solubility, suitable for use as a feed additive without additional processing, and can be produced using standard chemical industry apparatus.
Implementation Method 1
N-(aminoiminomethyl)-2-aminoacetic acid is crystallized from a water-containing solution in the presence of at least one guanidine compound
Implementation Method 2
N-(aminoiminomethyl)-2-aminoacetic acid in a thermodynamically metastable crystal modification
Data Source
AI summary
The present invention relates to a method for preparing N-(aminoiminomethyl)-2-aminoacetic acid comprising N-(aminoiminomethyl)-2-aminoacetic acid in a thermodynamically metastable crystal modification.