Biomass 1,6-Hexanediol Purification for Polymer Reactivity
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Solution Overview
Problem
Existing methods for producing biomass resource-derived 1,6-hexanediol compositions result in decreased reactivity and physical properties of polymers like polyesters and polyurethanes due to high content of compounds with two or more secondary hydroxyl groups, such as glucose and 6-hydroxyhexanal, which are not addressed in previous documents.
Innovation Solution
A method to produce 1,6-hexanediol compositions by adjusting the content of compounds with two or more secondary hydroxyl groups and 6-hydroxyhexanal to 100 ppm or less and 1500 ppm or less, respectively, through ion exchange and distillation, under controlled temperatures, using biomass-derived 6-hydroxycaproic acid as a raw material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If biomass resource-derived raw materials are used to produce 1,6-hexanediol compositions, then environmental friendliness is improved, but reactivity and physical properties of polymers deteriorate
Solution Approach 1:
The patent extracts and removes harmful impurities (compounds with two or more secondary hydroxyl groups and 6-hydroxyhexanal) from the biomass-derived 1,6-hexanediol composition through purification processes. This extraction of harmful substances allows the retention of the environmental benefits of biomass-derived 1,6-hexanediol while eliminating the factors that cause decreased reactivity and poor polymer properties.
Solution Approach 2:
The patent changes the compositional parameters of the 1,6-hexanediol composition by controlling the content of impurities to specific ranges (compounds with two or more secondary hydroxyl groups: 100 ppm or less; 6-hydroxyhexanal and derivatives: 1500 ppm or less). This parameter control enables the composition to maintain both environmental friendliness and satisfactory reactivity for polymer production.
2Object-affected harmful factors
If biomass resource-derived raw materials are used to produce 1,6-hexanediol compositions, then environmental friendliness is improved, but physical properties of polymers deteriorate
Solution Approach 1:
The patent extracts harmful impurities that cause poor polymer physical properties through purification processes. By removing compounds with two or more secondary hydroxyl groups and 6-hydroxyhexanal, the patent enables the production of polymers with satisfactory tensile strength and elongation while maintaining the environmental benefits of biomass-derived 1,6-hexanediol.
Solution Approach 2:
The patent controls the compositional parameters by limiting the content of harmful impurities to specific ranges. This parameter control ensures that the polymer physical properties (tensile strength, tensile elongation) remain satisfactory while preserving the environmental friendliness of using biomass resource-derived raw materials.
3Reliability
If purification steps are added to remove impurities, then reactivity is improved, but process complexity increases
Solution Approach 1:
The patent establishes specific compositional parameters for impurity content (compounds with two or more secondary hydroxyl groups: 100 ppm or less; 6-hydroxyhexanal and derivatives: 1500 ppm or less) as the target for purification. By defining clear parameter targets, the patent makes the purification process more manageable and controllable, reducing the overall complexity while achieving the desired reactivity improvement.
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 method produces a 1,6-hexanediol composition with enhanced reactivity, leading to polymers with improved tensile strength and elongation, while being environmentally friendly by reducing carbon dioxide emissions.
Implementation Method 1
a step (2) of purifying the 1,6-hexanediol composition obtained in the step (1) by ion exchange and/or distillation
Implementation Method 2
a step (2) of purifying the 1,6-hexanediol composition obtained in the step (1) by ion exchange and/or distillation
Data Source
AI summary
An object of the present invention is to provide an environmentally friendly method for producing a biomass resource-derived 1,6-hexanediol composition having excellent reactivity, a 1,6-hexanediol composition having excellent reactivity, which is obtained by the production method, and a polymer having excellent reactivity, which is obtained by reacting the 1,6-hexanediol composition. The production method of the present invention relates to a method for producing a 1,6-hexanediol composition, the method including: a step (1) of producing a 1,6-hexanediol composition from 6-hydroxycaproic acid and/or a derivative thereof obtained from a biomass resource-derived raw material; and a step (2) of purifying the 1,6-hexanediol composition obtained in the step (1), by ion exchange and/or distillation.