What is Ethanol Extraction(Alcohol Extraction)?
In this method, the plant material mixes with the ethanol, which are capable of stripping the cannabinoids from the hemp plant. Then ethanol can be boiled away. It can be said that ethanol is the most commonly used solvent for extracting CBD because of its effectiveness. It can produce more cannabinoids as well as preserve more terpenes. Some people even consider that ethanol extraction is the best method for extracting CBD from hemp. But it can pull more chlorophyll from the plant. It is also a long purification process.
What Makes the Best Equipment?
With the continuous development of evaporation equipment technology, evaporation equipment has been widely used in the field of chemical production and wastewater treatment. The evaporation effect and energy saving effect brought by it benefit chemical production, industrial wastewater treatment, dyes, and metallurgy. The wastewater treatment in the pharmaceutical, paper and other fields has been greatly improved, and at the same time promoted the transformation of these industries towards green and sustainable development.
Evaporation equipment, also known as evaporator, is equipment that concentrates the solution by heating or precipitates crystals from the solution. The evaporation equipment is divided into evaporation concentration equipment and evaporation crystallization equipment.
How is Ethanol Used for Cannabis Extraction?
Ethanol is a semi-polar dissolved coal, and the acting solvent is widely used in pharmaceutical, food, light industry, chemical and other industries. In order to reduce the use cost of ethanol solvents and the pollution to the environment, ethanol recovery devices are widely used. The ethanol recovery tower is currently the most widely used setting. It utilizes the principle that the boiling point of alcohol is lower than that of other solutions. At a temperature slightly higher than the boiling point of alcohol, the dilute alcohol solution to be recovered is heated and volatilized. After the tower body is refined , precipitate pure alcohol gas, and increase the concentration of alcohol solution, to achieve the purpose of alcohol recovery.
How does a Rotary Evaporator Work?
A rotary evaporator, known as “rotavap” as well, refers to a kind of equipment for solvent evaporation under reduced pressure, which is composed of a vacuum system, a heated water or oil bath, a condenser and a motor that rotates the evaporation flask. As its name suggests, what is special is that the evaporation flask can rotate.
A rotavap evaporates solvents from samples by utilizing the principle that the solvent will have a lower boiling point at a reduced pressure. Specifically speaking, the stepless speed regulation is adopted to make the evaporation flask rotate at a constant speed. By the rotation, materials can form a large area of uniform thin film on the inner wall of the flask. The evaporation flask is heated evenly by a water or oil bath, and materials, with a lower boiling point, is evaporated rapidly under the vacuum condition. The solvent steam is recycled in the receiving flask after being cooled by the high efficiency glass condenser.
A rotary evaporator is mainly used for the process of evaporation, concentration, crystallization, drying, separation, and solvent recovery, and especially used for the continuous distillation of large amounts of volatile solvents under reduced pressure. With so many application purposes, there is no doubt that a rotary evaporator can be applied in many areas. For example, it can be used in the small and pilot experiments and production in the biological, pharmaceutical, chemical fields and even food-making industries
What are Advantages of Rotary Evaporation for Ethanol Extraction?
- Higher evaporation efficiency. There are several factors contributing to higher evaporation efficiency. Firstly, the rotating flask can rotate at a constant speed, and materials can form a widespread film on the inner surface of the flask, which improves the evaporation efficiency greatly. Secondly, the high-efficiency glass condenser can improve the evaporation efficiency as well. Last but not least, continuous feeding and high vacuum degree are another factors.
- Better security. The stainless steel and aluminum alloy are widely used in the mechanical structure, and all glass parts are made of heat-resistant high borosilicate glass, which ensure a better security. Besides, the water/oil bath can be equipped with transparent covers to prevent splashing, and anti-explosion frequency changer and dynamo are available as well. All of these designs contribute to better security.
- More convenient operation. It’s much more convenient to use a rotary evaporator, because of the electrodeless speed regulation, digital display K Type Sensor and intelligent temperature control and other designs adopted by it.