Continuous Microwave Decarboxylation of CBDA to CBD
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Solution Overview
Problem
Current methods for increasing cannabidiol (CBD) content from Cannabis sativa L. are inefficient, particularly in converting cannabidiolic acid (CBDA) to CBD, which limits the production of CBD-rich pharmaceutical and health products.
Innovation Solution
A continuous microwave processing method that irradiates a reaction mixture containing CBDA and a solvent within a microwave-transparent reaction vessel, allowing for the conversion of CBDA to CBD while maintaining high yields and purity, using controlled temperature, pressure, and flow rates to optimize CBD production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional heat-treatment methods are used to convert CBDA to CBD, then the conversion process is simple and equipment requirements are low, but the conversion efficiency is low and CBD yield is limited
Solution Approach 1:
The patent replaces traditional thermal conduction heating with microwave irradiation to convert CBDA to CBD. The microwave processing unit uses electromagnetic radiation (2.45 GHz frequency) to directly heat the reaction mixture, achieving much higher conversion efficiency (CBD content increased from 0.2-0.5% to 20-40%) compared to conventional heat treatment, while maintaining relatively simple equipment structure.
Solution Approach 2:
The patent optimizes specific microwave processing parameters including power (300-500W), frequency (2.45 GHz), treatment time (30-60 minutes), and solvent composition (ethanol/water ratio) to maximize CBD conversion efficiency. These parameter optimizations enable high-yield CBD production while controlling processing time and energy consumption.
2Quantity of substance
If microwave processing is used to increase CBD content, then CBD yield and purity are significantly improved, but energy consumption increases
Solution Approach 1:
The patent employs continuous microwave irradiation throughout the extraction and conversion process. The microwave processing unit continuously treats the cannabis extract while it passes through the reaction vessel, ensuring complete CBDA conversion to CBD without interruption. This continuous processing maximizes CBD yield while optimizing energy utilization efficiency.
Solution Approach 2:
The patent utilizes the phase transition properties of solvents during microwave processing. The reaction mixture is heated to specific temperatures (60-80°C) under controlled pressure to maintain solvent in liquid phase during extraction, then allows phase separation after cooling. This controlled phase transition enables efficient CBD extraction and concentration while managing energy input.
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
This method significantly increases CBD content in extracts, achieving high yields and purity, outperforming traditional heat-treatment methods by enhancing the efficacy of CBD for pharmaceutical, health, and cosmetic applications.
Implementation Method 1
irradiating microwaves to a reaction mixture including a sample including CBDA and a solvent in a reaction vessel
Implementation Method 2
the conversion of CBDA to CBD
Implementation Method 3
controlled temperature, pressure, and flow rates to optimize CBD production
Data Source
AI summary
Provided are: a method of preparing a cannabis processed product having an increased CBD content in an efficient and economic manner, through a decarboxylation reaction by continuous microwave irradiation of a cannabis extract; and use of a processed product having an increased CBD content prepared by the method, a fraction thereof, and a single ingredient of CBD, in foods, drugs, and cosmetics.