Cannabinoid Conversion Solvent and Crystallization for D9-THC Purity
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Solution Overview
Problem
Existing methods for producing delta-9-tetrahydrocannabinol (D9-THC) are expensive, inefficient, and plagued by scalability issues, with conventional extraction from marijuana being costly and greenhouse cultivation being economically challenging, while chemical conversion of cannabidiol (CBD) to D9-THC faces limitations such as racemic mixtures, side products, and toxic reagent contamination.
Innovation Solution
A process involving the use of C9-C11 non-aromatic hydrocarbons as solvents in a conversion reactor followed by crystallization to convert cannabinoids like CBD into purified derivatives, including D9-THC, utilizing reaction conditions and solvent recovery to achieve high yields of cannabinoid derivatives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used to extract D9-THC from marijuana, then high-quality D9-THC can be obtained, but production costs increase and scalability is limited
Solution Approach 1:
The patent changes the chemical parameters of the conversion process by using specific catalysts (alumina, silica, molecular sieves) and controlling reaction conditions (temperature, pressure, solvent composition) to optimize both conversion efficiency and product purity, enabling scalable production without sacrificing quality
Solution Approach 2:
The patent extracts and isolates the desired D9-THC product from the reaction mixture through filtration and purification steps, separating it from unreacted CBD and side products to achieve high purity while maintaining production efficiency
2Productivity
If chemical conversion of CBD to D9-THC is performed using conventional reagents, then D9-THC can be produced, but toxic reagents and flammable chemicals create safety and contamination issues
Solution Approach 1:
The patent uses solid catalysts that can be easily filtered and disposed of or regenerated, replacing toxic liquid reagents that require complex waste treatment. The catalysts are used in small amounts and can be removed by simple filtration, eliminating toxic contamination concerns
Solution Approach 2:
The patent employs inert solvents and maintains controlled reaction conditions that prevent unwanted side reactions and eliminate the need for flammable chemicals, creating a safer reaction environment while maintaining conversion efficiency
3Quantity of substance
If complete conversion of CBD to D9-THC is achieved, then maximum yield is obtained, but unreacted CBD becomes difficult to separate from the product
Solution Approach 1:
The patent intentionally performs partial conversion of CBD to D9-THC rather than complete conversion, stopping the reaction when optimal product concentration is reached. This leaves sufficient unreacted CBD that can be easily separated by filtration, while still achieving high product yield and simplifying purification
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 achieves efficient conversion of CBD to high-purity D9-THC with reduced costs and improved scalability, minimizing impurities and environmental impact.
Implementation Method 1
Crystallization is a proven technique to produce high-purity compound mixtures and for this reason crystallization is the foundation for many pharmaceutical processes
Implementation Method 2
Compound crystallization via precipitation from solution is dependent on the solubility of the compound in a certain solvent over a broad temperature range
Data Source
AI summary
Some variations provide a process of converting a cannabinoid into a purified cannabinoid derivative, comprising: providing a starting composition comprising a cannabinoid; providing a C9-C11 non-aromatic hydrocarbon solvent; introducing the starting composition and the solvent to a conversion reactor; chemically converting some, but not all, of the cannabinoid to a cannabinoid derivative, generating a reaction mixture containing unreacted cannabinoid; conveying the reaction mixture to a crystallization unit; cooling the reaction mixture to precipitate unreacted cannabinoid out of the reaction mixture, thereby generating a mother liquor containing the cannabinoid derivative; and isolating and recovering the cannabinoid derivative from the mother liquor. Systems configured to carry out the disclosed processes are also provided. This invention offers a large-scale solution to economically convert CBD to D9-THC, among many other example. The principles of the invention may be applied to the conversion of various cannabinoids and terpenes into derivative products.