Winterization

What it is & why it is essential to cannabis extraction?

The process of winterization involves lowering the temperature of a solution in order to precipitate out the fats and waxes. This is done in order to increase the purity of the final products, as well as reduce the chance for rancidity and foul-tasting oils.

Essential for High Purity Cannabis Extracts
Increases efficiency of fractional distillation and crystallization

Winterization Solutions

When is Winterization done?

Many ethanol extraction and hydrocarbon extractions are done at subzero temperatures. By using chilled solvent, the chlorophyl, lipids, and waxes remain on the plant material and are never brought into the extract. This allows for lighter colored oils that are purer and more stable. If an initial extraction was not done at subzero temperatures, or as in the case C02 extraction and certain hydrocarbon extractions, the crude oil will carry all the lipids and waxes. In this instance the crude oil is dissolved into a solvent, generally ethanol, and brought to freezing temperatures. While being held at these low temperatures, the process of winterization begins. This stage is usually done in jacketed reactors or ultra-low freezers, and is followed by a filtration stage to remove the lipids and waxes that are now solid.

Winterization Products

Reactors for Winterization

Ai Dual-Jacketed 100L 316L-Grade Stainless Steel Reactor

  • ETL certified to UL and CSA standards
  • Customizable lid for various application
  • Positive/negative pressure gauge
  • Detachable condenser and collection tanks
  • Explosion proof options available

Reaction Vessels are extremely versatile in their applications, and crucial to sectors such as pharmaceutical production, research and process chemistry, botanical extraction and purification, as well as food production, and many others. Across International offers reactors ranging from 10 liters up to 200 liters, with stainless steel and glass options.

Freezers for winterization

Ai RapidChill 12 CF -86°C Ultra Low Freezer Upright UL 120V

  • UL/CSA certified
  • State-of-the-art Vacuum Insulated Panel (VIP, Micro-Cellular Polyurethane) insulated
  • Safe, environmentally friendly, energy efficient, and easy to acquire HC refrigeration system
  • Remote alarm, RS-485, and optional 4-20 mA transmitter

The Ai RapidChill series -86C ultra-low ULT freezers is designed for fast cooling, ultra-low power consumption, very low noise, and ease of maintenance. All RapidChill ultra-low freezers are UL certified.

Filtration for winterization

Ai 5 Liter Glass Separatory Funnel Kit with All PTFE Valves

Model
 SFunnel-5L
 Separatory funnel
 Capacity: 5000 mL
Height: 23 inches
Diameter: 9.5 inches
Top port: 34/45 joint
Bottom port: GL16
Material: high borosilicate glass 3.3
 Outlet
 3/8″ hose barb, GL16
 Outlet open/close valve material  PTFE
 Top stopper
 34/45 joint PTFE stopper
 Setup dimensions (WxDxH)
 7 x 9.5 x 29 inches

Introducing the new Ai separatory funnel kits with all PTFE valves. A separatory funnel, also known as separation funnel, separating funnel, or colloquially sep funnel, is a piece of laboratory glassware used in liquid-liquid extractions to separate (partition) the components of a mixture into two immiscible solvent phases of different densities. Typically, one of the phases will be aqueous, and the other a lipophilic organic solvent such as ether, MTBE, dichloromethane, chloroform, or ethyl acetate. All of these solvents form a clear delineation between the two liquids. The more dense liquid, typically the aqueous phase unless the organic phase is halogenated, sinks and can be drained out through a valve away from the less dense liquid, which remains in the separatory funnel.

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