Pharmaceutical freeze dryer
The pharmaceutical freeze dryer (lyophilizer) is equipment that allows the drying of materials without the need to heat them. The physical principle involved in freeze-drying is sublimation, which is the direct passage from a solid to a gaseous state, without passing through the liquid state. For the process to take place, the frozen product is dried under a vacuum, without thawing. A pharmaceutical freeze dryer is a high-tech equipment, which dehydrates by freezing (sublimation), keeping all the characteristics, nutrients, and physical structure of the products.
With the continuous development of freeze-drying technology, the pharmaceutical freeze dryer is widely used in the fields of freeze-drying of oral medicines, Chinese herbal medicines, plant extracts, and bio-medicine. The freeze-drying technology is increasingly favored by people because of its unmatched advantages of other drying methods, and its application scale is constantly expanding rapidly.
Pharmaceutical freeze dryer removes water from plants and organic compounds while they are in a frozen state. This locks in the freshness of herbs and plants. Their appearance, nutritional content, and potency remain the same as when they were fresh. Freeze drying completely removes water in about 24 hours. No other preservation method comes close to removing water this quickly. This is important because the longer a harvested plant or compound retains water, the greater the chance it has of spoiling and losing nutrition and potency.
Most water extraction methods destroy enzymes and terpenes because of the heat used in the extraction process. Because the pharmaceutical freeze-drying process does not use heat to remove water, the enzymes and terpenes in freeze dried products are not destroyed.
In recent years, the Chinese patent medicines have been processed by Pharmaceutical freeze dryer. The prepared Chinese patent medicines will be immersed, extracted, filtered, concentrated, and freeze-dried to make powders, tablets, or injections.