The different types of Soybean Lecithin: According to the different processing steps of soybean phospholipids, they can be divided into the following types:
- Natural crude Soy Lecithin. It is prepared by vacuum dehydration of by-product (oil foot) of soybean refined oil, also known as concentrated soybean phospholipid. The product has an acetone insoluble matter (phospholipid and glycolipid) content of 60% to 64%, and a soybean oil content of 36% to 40%.
- Modified Soy Lecithin. It is made by chemical modification of concentrated soybean phospholipids and has good hydrophilicity and oil-in-water (O/W) emulsification function. There are three main modification methods: physical method, chemical method and enzymatic method. Its acetone insoluble content is the same as that of natural crude phospholipids, but its emulsification and hydrophilic properties are significantly higher than concentrated soybean phospholipids, so it has greater advantages in feed addition performance, liquid feed preparation and energy digestion and absorption. It is widely used in feed.
- Deoiled Soy Lecithin Powder/granules. It is a high-purity phospholipid product obtained by removing concentrated soybean phospholipids from acetone and oil. It is also called deoiled phospholipid powder. The color is beige or light brown, in the form of powder and granules, and the acetone insoluble content is 95% to 98%.
- Refined Soy Lecithin. The deoiled soy lecithin obtained by acetone precipitation can be purified by ethanol oil extraction, and after ethanol treatment, it is divided into an alcohol-soluble portion and an alcohol-insoluble portion. The alcohol-soluble part of the phospholipid has a high content of choline and enhances its hydrophilicity, and is an O/W type emulsifier; the alcohol-insoluble part is divided into phosphatidic acid ethanolamine and phospholipid cold muscle alcohol, and is a W/O type emulsifier.
- Lecithin oil. It is a phospholipid product diluted with vegetable oil and fatty acid. It has low viscosity and is easy to pump or spray. The phospholipid content is generally from 30% to 52%.
- Powdered soybean lecithin. it is solid powdery products formed by liquid lecithin and with carrier. The phospholipid content is from 10% to 50%.
- Bleached Soy Lecithin. The crude phospholipids are further dehydrated by bleaching with hydrogen peroxide and have a water content of less than 1%.