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Cannabis Manufacturing: Proper Liquid Filtration for Professional Quality Cannabis Extracts and Oils
Filtration for Cannabis Manufacturing
A Growing Industry in Botanical Extraction Extracts of the active ingredients from the Cannabis sativa plant are now common options for various applications, particularly in the medical community in certain states in the United States, and Canada. Cannabis oil extracts can be further processed to make
standard extracts, concentrates, oils, THC distillate oil, CBD oil, or solids for application like those
for medical marijuana in the form of edibles, vape oil, or topical applications.
For manufacturers of cannabis products, proper filtration is crucial to producing high-quality, pure,
and safe cannabis extracts and cannabis products.
The Difference Filtration Makes The filtration stage of producing essential cannabis oil, wax,
shatter, concentrate, or distillate, including medical marijuana and hemp oil, is key to ensuring
product safety and quality.
Reliable cannabis extract producers of medical-grade marijuana and hemp oil turn to
precision equipment to achieve excellence in every aspect of the liquid product from taste, and
smell, to an appealing appearance.
The right combination of proper techniques and tools is the difference between a clear, amber
extract, and a muddy, undesirable product that contains plant particles, debris, and unwanted
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Where Filtration Meets the Extraction Process
The filtration methods used, and the extent to which they are used, vary based on the desired quality of the end product, as well as the type of product.
Preparing for Filtration: The Extraction Process
If done properly, this step eliminates the need for excessive filtration early in the process.
1. Crude extraction is the process that blends a solvent like ethanol, CO2 , butane, or propane with the
biomass to liquefy the product. Each liquid is used for a different end-product or to abide by local laws.
a. For example, extractions using cold ethanol are usually only used to make distillate oil—not shatters, crumbles, or waxes. The resulting clear or light amber oil can be used for vaping applications, but ethanol is also used in cities that restrict the use of manufacturing processes with volatile chemicals
like propane. For larger processes, one batch may include 100-200 pounds of plant material, and 100 gallons of ethanol.
b. Propane, when allowed, is cleaner than butane processes, and can cut the extraction process in half, but is not as commonly used as ethanol extraction.
c. CO2 provides the cleanest extraction. However, the systems are very costly, operate under very
high pressure, and take the longest to extract.
2. The desired result is a solvent saturated with cannabinoids; the oils have dissolved from the plant
material into the solvent.
3. For butane, propane, or CO2 solvents, the next step is winterization, or freezing for solvent removal.
When extracting with cold ethanol, winterization is not necessary due to the extremely low temperatures. Winterization in a commercial production setting normally involves lowering temperatures to between -40 degrees Celsius, to -80, for 12-16 hours.
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