Oil-Based Esterquat Preparation With Low Triesterquat Formation
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Solution Overview
Problem
Existing methods for producing esterquats used in fabric softeners result in high levels of triesterquats, which are inactive, and require expensive fatty acids, complex processes, and low-molecular alcohol solvents that cause undesirable side reactions and increased costs.
Innovation Solution
A transesterification process involving the stepwise addition of fatty acid oils to hydroxy alkyl tertiary amines under atmospheric pressure, followed by quaternization without low-molecular alcohol solvents, to enhance selectivity towards mono- and diesterquats and reduce equipment and operating costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If fatty acids are used as starting material, then the fabric softener material can be produced, but the production cost increases due to expensive fatty acids
Solution Approach 1:
The invention changes the starting material from pure fatty acids to fatty acid-containing oils, which are cheaper and more readily available. This parameter change in raw material selection reduces production cost while still enabling the transesterification reaction to produce the desired esterquat fabric softener material
Solution Approach 2:
The invention uses cheaper fatty acid-containing oils (such as vegetable oils or animal fats) instead of expensive pure fatty acids. These oil-based starting materials are more economical and can be easily obtained, reducing the overall production cost while maintaining product effectiveness
2Productivity
If low-molecular alcohol solvents are used in quaternization reaction, then the reaction can proceed, but undesirable side reactions occur generating unpleasant odor
Solution Approach 1:
The invention extracts or removes the low-molecular alcohol solvent from the quaternization reaction system. By conducting the reaction without these solvents, the harmful side reactions that generate unpleasant odors are eliminated, while the quaternization reaction still proceeds effectively to produce the desired esterquat product
3Manufacturing precision
If high vacuum conditions are applied during transesterification, then the reaction can be controlled, but the process complexity and operating costs increase
Solution Approach 1:
The invention enables the transesterification reaction to proceed effectively under atmospheric pressure without requiring high vacuum conditions. The reaction system is self-sufficient and can be controlled using simple equipment, eliminating the need for complex vacuum apparatus while still achieving the desired reaction outcomes and product quality
4Reliability
If trialkanolamine reacts with fatty acids to produce fabric softener, then the softening effect is achieved, but the amount of inactive triesterquat increases reducing product efficiency
Solution Approach 1:
The invention segments the fatty acid starting material into a mixture of different chain lengths and structures within the fatty acid-containing oil. This segmentation approach, combined with controlled transesterification, produces a more favorable distribution of mono- and diesterquats (active compounds) while reducing triesterquat formation, thereby increasing the concentration of effective softening agents in the final product
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 increases the selectivity of mono- and diesterquats, reduces the formation of unwanted by-products, and lowers production costs by using fatty acid oils instead of expensive fatty acids, while eliminating the need for vacuum conditions and low-molecular alcohol solvents.
Implementation Method 1
a transesterification reaction of a hydroxy alkyl tertiary amine with a fatty acid oil or a mixture comprising one or more fatty acid oils and one or more fatty acids
Implementation Method 2
followed by quaternization without low-molecular alcohol solvents
Data Source
AI summary
The present invention relates to a process for producing an esterquat by a transesterification reaction of a fatty acid oil or a mixture comprising one or more fatty acid oils and one or more fatty acids with a tertiary hydroxy amine and then a quaternization reaction. Esterquats obtained by the method of the invention show beneficial properties in particular when used as active component in fabric softener materials.