US20190241536A1 – August 8, 2019 – METHOD FOR EXTRACTING COMPOSITIONS FROM PLANTS

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Inventors :

Anthony J. Durkacz; Mark T. Cullen

Owner :

WORLD CLASS EXTRACTIONS INC.

Application Number :

US16265768

Document Number :

US20190241536A1

Priority Date :

February 1, 2019

Filing Date :

February 1, 2019

Date of Grant/ Publication :

August 8, 2019

Class :

C07D311 / 80; C07C37 / 68; C07C37 / 70; C07C37 / 74

Abstract

Methods for extracting and concentrating cannabinoids using ultrasound-enhanced solvent extraction. Freshly harvested cannabis plant materials, which may be selectively chosen plant parts or the entire plant itself, are shredded to a particular particle size. The plant material is then mixed with a solvent to form a slurry, and thereafter subjected to ultrasound to release intracellular contents into the solvent. Filtering steps are then applied to remove biomass, waxes and chlorophyll. Water removal and solvent recovery steps are further applied to ultimately derive an extract having high concentrations of target cannabinoids, and in particular cannabidiol (CBD). The methods may be deployed on-site in batch or continuous flow processes, and may further be utilized to derive other types of materials from plants, such as essential oils.

Claim(s)

1 . A method for extracting and concentrating cannabinoids from cannabis plant material comprising the step: a) harvesting a cannabis plant from which said cannabis plant material is derived; b) shredding or grinding said harvested plant in step a) to produce particulate plant material; c) mixing said particulate plant material in step b) with a solvent to form a slurry; d) subjecting said slurry produced in step c) to ultrasonic energy, said ultrasonic energy being applied at a frequency ranging from 5 kHz-1 MHz and having a displacement amplitude in the range from about 20 to 100 mm with power being delivered to said slurry in a range from about 90 to about 160 watts per square centimeter of slurry treated, said ultrasound being applied for a duration ranging from 30 seconds to 5 minutes; e) filtering said slurry treated with ultrasound in step d) to remove wax, biomass and chlorophyll to derive a liquid extract; and f) treating said extract produced in step e) to remove any water emanating from said cannabis plant shredded in step b) and residual solvent introduced in step c) to produce a concentrated resultant extract.;
20 . A method for extracting and concentrating cannabinoids from cannabis plant material comprising the step: a) harvesting a cannabis plant from which said cannabis plant material is derived; b) shredding or grinding said harvested plant in step a) to produce particulate plant material; c) mixing said particulate plant material in step b) with a solvent to form a slurry; d) subjecting said slurry produced in step c) to ultrasonic energy, said ultrasonic energy being applied at a frequency ranging from 5 kHz-1 MHz and having a displacement amplitude in the range from about 20 to 100 mm with power being delivered to said slurry in a range from about 90 to about 160 watts per square centimeter of slurry treated, said ultrasound being applied for a duration ranging from 30 seconds to 5 minutes; and e) sequentially filtering said slurry produced in step d) to remove biomass, chlorophyll and wax to derive a liquid extract; f) heating said extract produced in step e) to vaporize and separate any water emanating from said cannabis plant shredded in step b), and solvent introduced in step c) to isolate a concentrated resultant extract.

Summary

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