The process of subcritical ethane extraction of soy protein.
Preparation of raw materials: high-quality soybeans are selected as raw materials.
Pre-treatment: The soybeans are subjected to pre-treatment operations such as cleaning, soaking, crushing and peeling.
Adjustment of conditions: according to the extraction needs, adjust the process parameters of subcritical fluid extraction, including extraction temperature, pressure, time and material solubility ratio.
Extraction process: Pretreated soybeans are loaded into the extraction tank and injected with subcritical ethane as the extractant. At a certain temperature (usually close to room temperature) and pressure, the extraction process. Since ethane has good solubility for oils and fats in the subcritical state, soy protein can be extracted at a lower temperature, reducing damage to protein structure and function .
Solid-liquid separation: After the extraction is completed, the extract is separated from the solid residue.
Evaporation: The extract is evaporated to remove the ethane solvent and obtain the concentrate containing soy protein.
Drying: The concentrate is spray-dried or freeze-dried to obtain soy protein powder.
Post-processing: The extracted soy protein is subjected to necessary post-processing, such as crushing, sieving, etc., in order to obtain a final product that meets the requirements.
Quality control: carry out quality test on the extracted soy protein, including protein content, solubility, emulsification and other indexes.
Packaging and storage: Package the qualified soy protein and store it under suitable conditions.
