THCA Extraction via Liquefied Propane and Centrifugal Crystallization
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Solution Overview
Problem
Current methods for purifying tetrahydrocannabinolic acid (THCA) from THC in Cannabis are expensive, time-intensive, and not scalable for medicinal or pharmaceutical production, and there is a lack of data on the effects of plant-based medicines due to instability and variability in plant-based compounds.
Innovation Solution
A method involving maceration, solvent extraction with liquefied n-propane, followed by centrifugation to separate terpene and isoprenoid compounds, allowing for the selective isolation of highly-purified THCA through crystallization and fractionation, using a process that is cost-effective and robust for scaled production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current purification methods are used for THCA from THC, then purification can be achieved, but the process is expensive, time-intensive, and not scalable
Solution Approach 1:
The patent employs phase transition of solvents (supercritical fluid extraction using CO2) to achieve selective separation of THCA from THC and other cannabis compounds. The supercritical state allows for efficient extraction, and phase change back to liquid/gas enables easy separation and concentration of the target compound, dramatically improving purification speed and scalability while reducing process complexity
Solution Approach 2:
The patent utilizes changes in temperature, pressure, and solvent composition parameters to selectively extract and purify THCA. By adjusting these parameters during the extraction and fractionation process, the method achieves rapid separation of THCA from psychoactive compounds and other cannabis constituents, enabling scalable production without complex equipment
2Reliability
If plant-based medicines are used directly, then medicinal effects can be observed, but instability and variability of compounds make safety and efficacy testing difficult
Solution Approach 1:
The patent extracts and isolates specific non-psychoactive compounds (THCA, CBDA, THCV) from the complex cannabis plant matrix. This extraction of individual compounds eliminates the variability and instability issues associated with whole plant extracts, providing consistent, purified materials for reliable safety and efficacy testing while simplifying the testing process by removing confounding synergistic or interfering effects
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 enables rapid, cost-effective extraction and purification of THCA, achieving high purity and stability, reducing the concentration of psychoactive compounds, and facilitating meaningful medicinal testing and pharmaceutical use.
Implementation Method 1
liquefied and chilled n-propane then being introduced into the degassed solvent extraction chamber containing plant material such that the liquid n-propane solubilizes the terpene and isoprenoid compounds from plant material
Implementation Method 2
the extract and polymorphic crystals then being subject to centrifugal separation, with the pelleted polymorphic crystals containing primarily isoprenoid compounds being separated from the terpene compound-rich supernatant
Implementation Method 3
with the temperature and vacuum being such that after a certain period of time polymorphic crystals begin to form
Data Source
AI summary
A method for the extraction and isolation of the terpene and isoprenoid compounds from plant material, followed by a centrifugal force induced selective crystallization of isoprenoids resulting in a separation of terpene and isoprenoid fractions. This this method is suitable for the extraction of cannabinoids from Cannabis and the enrichment tetrahydrocannabinolic acid and reduction of tetrahydrocannabinol in an extract.