Sulfide Preparation TRIZ Cases
- 1,2-Benzisothiazolin-3-One Synthesis With Low Thioether By-Products
A sulfide-alkyl halide route raises 1,2-benzisothiazolin-3-one yield while cutting thioether by-products and enabling alkyl halide reuse.
- Dual-Polythiol Composition for Stria-Free Optical Lens Polymerization
A higher-molecular-weight polythiol additive moderates isocyanate reaction speed to suppress stria and improve optical lens uniformity.
- Hydroxyl-Containing Thiol-Alkene Ethers for Low-Odor Resins
Highly miscible hydroxyl-containing monomers polymerize within seconds, reducing thiol odor and dimensional change in casting and 3D printing.
- Thiourethane Optical Material pH Adjustment Whitening Prevention
Washing polythiol with acid and base adjusts pH to 3.1–7, preventing lens edge whitening and nonuniform polymerization in thiourethane optical materials.
- Sulfonyl Chloride III Synthesis via Reagent Replacement
Replacing expensive LDA with economical alternatives lowers production costs for pyroxsulam herbicide synthesis while maintaining high market accessibility.
- CeO2 Nanoparticle Catalyst for Methionine Hydrolysis Yield
Precise CeO2 particle sizing resolves yield consistency contradictions in methionine production, achieving 95% selectivity.
- Continuous-Flow Reactor for Carbocisteine Impurity Control
A continuous-flow reactor system manages reaction parameters to produce high-purity carbocisteine.
- Methionine Production via Single-Step Catalytic Hydrolysis
Single-step catalytic hydrolysis of amino-nitrile precursors eliminates intermediate isolation steps, boosting manufacturing yield for industrial production.
- Reactive Absorption for Methylmercaptopropionaldehyde Production
A reactive absorber merges acrolein absorption and reaction with methyl mercaptan to form methylmercaptopropionaldehyde in a single unit.
- Photoredox Catalytic SF6 Addition to Unsaturated Bonds
Visible light photocatalysis converts inert sulfur hexafluoride into reactive reagents, bypassing toxic alternatives like SF5Cl for safer synthesis.
- CeO2 Catalyst Particle Size Optimization for Methionine Hydrolysis
Optimized CeO2 particles resolve inconsistent yields in methionine hydrolysis by maintaining 99% conversion at 75°C.
- Mono Vinyl Thioether Synthesis via Low Pressure Acetylene Addition
Operating below 2 bars suppresses divinyl by-products, ensuring high selectivity and purity without complex separation steps.
- Clean D,L-Methionine Synthesis via CO2 Phase Transition
Pressurized carbon dioxide acidifies the reaction fluid to control pH, eliminating organic wastewater from polyvinyl alcohol use.
- Thiophene Synthesis via Merged Steps and Preliminary Action
A thiophene synthesis process merges reaction steps to streamline production of pharmaceutical intermediates.
- Polythiol Purity Control via Chromatography Peak Monitoring
Hydrolysis termination based on gel permeation chromatography peak area ratios yields high purity polythiol compositions.