Dialkyl Tin Oxide Catalyst Composition for Transesterification
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Solution Overview
Problem
Current methods for synthesizing amino alkyl (meth)acrylates using dialkyl tin oxide catalysts are complex, energy-intensive, generate waste, and pose health risks due to fine particle exposure, with induction times increasing production costs and requiring multiple steps and high temperatures.
Innovation Solution
A highly concentrated and stable dialkyl tin oxide composition comprising 80-90% dialkyl tin oxide, 5-10% alkyl(meth)acrylate ester, and 5-10% amino alcohol, prepared through a process involving wetting, grinding, and heating to create a suspension that reduces particle size and eliminates fine particles, allowing for efficient transesterification at lower temperatures without generating waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dialkyl tin oxide is used in solid form for transesterification, then catalytic activity is achieved, but induction time increases and productivity decreases
Solution Approach 1:
The patent changes the physical state parameter of dialkyl tin oxide from solid to liquid form. This parameter change eliminates the induction period observed with solid catalysts while maintaining catalytic activity, thereby improving productivity without sacrificing reliability
Solution Approach 2:
The patent introduces an organic solvent as an intermediary medium to dissolve dialkyl tin oxide, creating a liquid catalyst solution. This intermediary enables the catalyst to function effectively in liquid form, resolving the contradiction between maintaining catalytic activity and improving productivity
2Productivity
If dialkyl tin oxide particle size is reduced to pulverulent state, then induction time decreases, but safety risks increase due to dust inhalation
Solution Approach 1:
The patent changes the physical state parameter from solid particles to liquid solution, eliminating dust formation while maintaining the benefits of reduced induction time. This resolves the contradiction between improving productivity and ensuring safety
Solution Approach 2:
The patent converts the harmful dust particles into a beneficial liquid solution form. The same dialkyl tin oxide that creates safety hazards as fine dust is transformed into a safe liquid catalyst that retains the productivity benefits of fine particle distribution
3Reliability
If reagents are dried by azeotropic distillation before DBTO addition, then water content is reduced, but process complexity and energy consumption increase
Solution Approach 1:
The patent uses the reaction components themselves (amino alcohol and alkyl (meth)acrylate) as the solvent medium for the catalyst, eliminating the need for separate drying steps. The system serves its own solvent function, reducing process complexity while maintaining reliability
Solution Approach 2:
The patent extracts the separate drying step from the overall process by incorporating catalyst dissolution directly into the reaction medium preparation, eliminating the need for azeotropic distillation while maintaining water content control
4Reliability
If solvent evaporation and filtration steps are added to pre-activate organo tin derivative, then catalyst activation is improved, but process complexity increases
Solution Approach 1:
The patent merges the catalyst activation and reaction initiation steps by dissolving dialkyl tin oxide directly in the reaction medium. This eliminates separate activation steps while maintaining effective catalyst activation, thereby reducing process complexity
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 composition significantly reduces induction and reaction times, improves productivity, and eliminates health risks associated with fine particles, while simplifying the process and reducing energy consumption, resulting in a more efficient and eco-friendly synthesis of amino alkyl (meth)acrylates.
Implementation Method 1
dialkyl tin oxide catalyst composition and its use for the synthesis of amino alkyl (meth)acrylates by transesterification
Implementation Method 2
The first wetting solution and the second wetting solution are used during the wetting, grinding and/or slicing of the dialkyl tin oxide particles
Implementation Method 3
grinding and/or slicing of the wetted dialkyl tin oxide particles in the presence of a second wetting solution
Implementation Method 4
heating of the resulting composition to obtain a composition (B)
Data Source
AI summary
The invention relates to a new dialkyl tin oxide catalyst composition and its use for the synthesis of amino alkyl (meth)acrylates by transesterification from an alkyl (meth)acrylates and an amino alcohol, and especially 2-dimethylaminoethyl (meth)acrylate.The invention also relates to polymers made with quaternized amino alkyl (meth)acrylates and use of said polymers in water treatment, sludge dewatering, papermaking process, agriculture, cosmetic and detergency composition, textile process, oil and gas recovery process such as enhanced oil recovery, fracturing, mining operation such as tailings treatment.