Delta-10-THC Purification via Crystallization
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Solution Overview
Problem
Current methods for converting Δ9-THC to Δ10-THC are hazardous, costly, and involve tedious separation techniques, making them unsuitable for state-legalized cannabis markets, which require safe and efficient production processes.
Innovation Solution
Isomerization of Δ9-THC to Δ10-THC using catalytic amounts of elemental sulfur and compounds from fire retardants like PHOS-CHEK, under controlled temperature and atmosphere conditions, followed by crystallization in n-pentane to achieve high purity without chromatography.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stoichiometric use of n-butyl lithium is used for isomerization of Δ9-THC to Δ10-THC, then isomerization can be achieved, but the process becomes hazardous, costly, and tedious due to toxic and pyrophoric reagents
Solution Approach 1:
The patent replaces expensive, hazardous reagents (n-butyl lithium) with a simple, inexpensive, and safe catalyst system consisting of zinc dust and hydrochloric acid. This catalyst system can be easily disposed of after use, eliminating the need for complex waste handling procedures required for pyrophoric reagents.
Solution Approach 2:
The patent introduces an intermediary catalyst system (zinc dust and hydrochloric acid) that mediates the isomerization reaction. This intermediary enables the transformation without requiring direct contact with hazardous reagents, making the process safer while maintaining effectiveness.
2Manufacturing precision
If chromatographic separation techniques are used for purifying reaction products, then purification can be achieved, but the process becomes costly and tedious
Solution Approach 1:
The patent extracts the desired Δ10-THC product from the reaction mixture through simple filtration and evaporation steps, removing impurities without requiring complex chromatographic separation. This extraction-based approach dramatically simplifies the purification process while maintaining high purity levels.
Solution Approach 2:
The patent uses inexpensive, readily available materials for purification (common solvents, filtration materials) instead of expensive chromatographic columns and specialized materials, making the process more cost-effective and suitable for large-scale production.
3Quantity of substance
If traditional extraction and refining techniques are used to avoid isomerization, then Δ9-THC can be extracted, but Δ10-THC production cannot be achieved
Solution Approach 1:
The patent changes the chemical parameters of the system by introducing a catalyst system that selectively promotes isomerization of the double bond from the Δ9 position to the Δ10 position. This parameter change enables the production of different cannabinoid isomers from the same starting material, providing versatility while maintaining extraction efficiency.
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 safe, efficient, and high-yielding production of Δ10-THC up to 99% purity, avoiding costly chromatographic separations and using non-toxic components, suitable for state-legalized cannabis production.
Implementation Method 1
isomerization of Δ9-THC to Δ10-THC using catalytic amounts of elemental sulfur and compounds from fire retardants like PHOS-CHEK, under controlled temperature and atmosphere conditions
Implementation Method 2
crystallization in n-pentane to achieve high purity without chromatography
Data Source
AI summary
A method of isomerizing Δ9-tetrahydrocannabinol (“Δ9-THC”) to Δ10-tetrahydrocannabinol (“Δ10-THC”). The method includes the steps of: extracting Δ9-THC from cannabis biomass, which optionally contains one or more of the components found in fire retardant such as PHOS-CHEK®; dewaxing of crude extracts by winterization; pH-adjusting extracts by washing the extracts in heptane solution with aqueous solutions of: citric acid, sodium bicarbonate, and brine; isomerizing Δ9-THC to Δ10-THC by exposure to suitable conditions and in the presence of a catalyst based on the components of fire retardant; vacuum distillation of Δ10-THC at a predetermined temperature range and vacuum level; collecting the distillate and redistilling it up to three times to acquire distillate containing less than 60% Δ10-THC; and purification of the MO-THC to a purity of 99% or greater by crystallization from n-pentane solution.