Hydrated ATBS Crystals Morphology Control
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Solution Overview
Problem
2-Acrylamido-2-methylpropane sulfonic acid (ATBS) crystals exhibit poor solid handling and processing properties due to their needle-shaped morphology, leading to issues such as low crystal particle size, high specific surface area, and explosive fine dust, which complicates filtration, drying, and handling.
Innovation Solution
A hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid is produced through a method involving mixing with an aqueous solution, heating, cooling, and solid/liquid separation, resulting in crystals with improved properties like increased minimum ignition energy and specific X-ray diffraction and infrared spectra, reducing the risk of explosion and enhancing handling characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional crystallization method is used to produce 2-acrylamido-2-methylpropane sulfonic acid, then the product can be obtained, but the crystals exhibit needle-shaped morphology leading to poor solid handling, low particle size, high specific surface area, and explosive fine dust
Solution Approach 1:
The patent applies parameter changes by modifying the crystallization conditions, specifically controlling the pH value during crystallization to obtain a specific crystalline form (Form I) with improved morphology. By adjusting the pH parameter and using specific solvents, the needle-shaped crystals are transformed into a form with better handling properties and reduced dust explosion risk
Solution Approach 2:
The patent produces a composite crystalline structure by controlling the crystallization process to form a specific hydrate form (Form I) with defined crystallographic structure. This composite approach results in crystals with optimized properties combining safety, handling characteristics, and filtration performance
2Productivity
If needle-shaped crystals are produced, then the synthesis reaction can proceed, but the crystals present poor filterability and difficulty in drying operations
Solution Approach 1:
The patent changes the crystallization parameters, specifically controlling pH and solvent composition, to produce crystals with improved filterability. The specific crystalline form (Form I) obtained through these parameter changes exhibits better filtration characteristics and drying performance compared to conventional needle-shaped crystals
3Reliability
If conventional drying is applied to remove acrylonitrile and acrylamide, then the product purity can be improved, but the needle-shaped crystal structure causes low resistance to shear force and attrition during processing
Solution Approach 1:
The patent modifies the crystallization parameters to produce a crystalline form with enhanced mechanical strength and resistance to attrition. By controlling the crystallization process to form specific crystal structures, the product maintains structural integrity during drying and processing while achieving the required purity levels
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 hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid demonstrates improved filterability, chemical, and thermal stability, reducing the risk of explosion and enhancing handling, making it suitable for applications like enhanced oil and gas recovery.
Implementation Method 1
A hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid is produced through a method involving mixing with an aqueous solution, heating, cooling, and solid/liquid separation
Implementation Method 2
having a 2-theta powder X-ray diffraction diagram comprising peaks at 10.58°, 11.2°, 12.65°, 13.66°, 16.28°, 18.45°, 20°, 20.4°, 22.5°, 25.5°, 25.88°, 26.47°, 28.52°, 30.28°, 30.8°, 34.09°, 38.19°, 40.69°, 41.82°, 43.74°, 46.04° degrees
Implementation Method 3
specific X-ray diffraction and infrared spectra
Data Source
AI summary
The present invention relates to a hydrated crystalline form of 2-acrylamido-2-methylpropane sulfonic acid having a 2-theta powder X-ray diffraction diagram comprising peaks at 10.58°, 11.2°, 12.65°, 13.66°, 16.28°, 18.45°, 20°, 20.4°, 22.5°, 25.5°, 25.88°, 26.47°, 28.52°, 30.28°, 30.8°, 34.09°, 38.19°, 40.69°, 41.82°, 43.74°, 46.04° degrees (+/−0.1°).The present invention also relates to a production method for this form of 2-acrylamido-2-methylpropane sulfonic acid and a preparation method for an aqueous solution A of a salt of this form of 2-acrylamido-2-methylpropane sulfonic acid, and the (co)polymer of this form of -acrylamido-2-methylpropane sulfonic acid.