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What is a Closed Loop Extractor? Private

2 weeks ago Home & Garden Balfour   8 views

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Sanitary pumps are used in the food, agricultural, and pharmaceutical industries to transport liquids and liquid–solids. This chapter provides a guide to sanitary pump selection and use. “Sanitary” means that the pump is cleanable. Sanitation standards for pumps are reviewed. Four classes of sanitary pumps are described and a decision tree for selecting the best class for a given application is introduced. Five application requirements needed for pump selection are outlined: process requirements, product properties, operational requirements, cost, and safety. Installation details and cleaning processes for pump s are assessed.

Sanitary pumps used in high-purity applications such as pharmaceutical processing and biotechnology typically require a level of design that is higher than in most other processing industries. The pumps not only need to transfer product efficiently, but they must also meet strict design and cleanability requirements mandated by the many organizations that establish standards for ultra-clean processing!

The first big question when selecting a pump is: ‘What type of pump do I need?’ To answer that, it helps to understand a little about pump design and consider the various pump styles that are available to fit your application.

Solvent Collection Tanks

The extraction/collection tank collects the extracted oil and solvent at the end of the process. The larger the vessel the more trim (raw plant matter) you can process at once. It is not uncommon for a large collection vessel to be the repository of multiple material columns, provided it has enough volume to hold the volume of solvent initially. Once in the collection vessel, the solvent is warmed until it reverts to a gaseous form which can then be removed with a recovery pump such as the Haskel we carry. The extracted oil ("drop off") can then be poured into an external container for further vacuum purge if necessary.

Closed-loop extraction is a method used for extraction of cannabinoids like tetrahydrocannabinol (THC), cannabidiol (CBD), and terpenes from cannabis plant material. This extraction method occurs entirely within a closed vessel, so the hydrocarbon solvent used to extract cannabinoids never makes contact with the outside atmosphere – hence the name “closed loop extractor.”

Closed-loop extraction is not new or unique to the cannabis industry. Industries also use this extraction method to extract essential oils for things like food additives and perfumes. However, in recent years, it has become a widely popular cannabis extraction method. Closed-loop extraction is efficient, produces a clean product, and industry professionals regard it as safer than open-loop, or “open blast”, extraction.

Solvents for Closed-Loop Extractors

Closed-loop extractors use hydrocarbons like butane as solvents to extract cannabinoids. Butane is the most popular solvent in the cannabis industry – It’s a non-polar hydrocarbon with a low boiling point ( 31.1°F), which allows for the cold-boiling of any residual solvent from the concentrate and preserves temperature-sensitive terpenes.

Extractor kits can also use propane. Propane can be purged easily because of its low boiling temperature and makes a slightly different extraction than butane. However, because propane is much more expensive than butane, it’s common to find closed-loop equipment that works on a blend of butane and propane. Blending butane with propane creates a gas mixture that strips additional terpenes and purges more efficiently than just butane alone.

In both open and closed-loop extraction, the initial process is the same. The pressurized solvent (usually butane) is washed over the cannabis plant matter, extracting the desired cannabinoids from the biomass material. In closed-loop extraction, the concentrate is then purged of all solvent in a separate vacuum oven, and then subsequently heated. In open-loop extraction, there is no purge, and some butane residue remains in the concentrate.

After the wash, and in closed-loop extraction, purge/heating, the concentrated oil can be collected and further refined.

The Essential Oils Industry Discovery of Closed-Loop Extractors with extractor spool

Essential oil industrial professionals have used closed-loop hydrocarbon extraction since the 1970s. The United States Food and Drug Administration (FDA) considers butane and propane as food-safe ingredients, within certain limits. Hydrocarbon extraction is a popular choice among cannabis industry professionals because it produces a finished product with approximately 90-99% cannabinoids. Hydrocarbon extraction also creates many quality concentrate products from a single extraction, without any further refinement. Thus, hydrocarbons are the most commonly used extraction solvents.

Many people initially used open-loop extraction methods for cannabis extraction. It wasn’t until recently that cannabis industry professionals adopted a closed-loop methodology to create cannabis concentrates. The development of closed-loop technologies represents a paradigm shift in the way both producers and consumers approach concentrates.


 
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