High-Efficiency Energy-Saving Corn Germ Oil Production Line Equipment

Corn Germ Oil Production Line: Efficient Extraction with Premium Quality

Corn germ oil is highly valued in the edible oil industry for its nutritional benefits and health advantages. Our corn germ oil production line integrates advanced technology and engineering design to deliver a comprehensive solution from raw material preparation to refined oil, ensuring high efficiency and excellent oil quality throughout the manufacturing process.

Process Overview

We provide two tailored processing methods for corn germ oil extraction, differentiated by capacity, with 100 TPD as the dividing line for optimal selection:

1. Full Press Method (Ideal for ≤ 100 TPD): This approach employs a screw press as the main extraction equipment. Pre-steamed and roasted oil cake is gradually compressed inside the press chamber by the screw shaft, applying intense mechanical pressure that squeezes out the oil. Typically, the residual oil content in the pressed cake ranges from 6% to 8%. Advantages include a streamlined process, lower capital expenditure, and crude oil with rich flavor. The limitation is a relatively lower oil yield, making it suitable for small to medium scale producers.


2. Combined Pre-Pressing and Solvent Extraction Process (Ideal for > 100 TPD): This method uses a set of equipment including a pre-press, leaching system, evaporation unit, and DTDC solvent extractor. The pre-press removes a significant portion of the oil, leaving a cake containing 12%-18% residual oil. This cake is subsequently crushed and subjected to solvent leaching—commonly using n-hexane—in a countercurrent extraction setup to recover remaining oil with residual oil dropping to ≤ 0.5%. Solvent consumption is maintained at ≤ 1.5 kg per ton. This process achieves very high oil recovery efficiency, superior economics, and is optimized for large-scale continuous operations.

Sectional Process Details

1. Raw Material Pre-Treatment: This crucial stage ensures equipment safety, steady operation, and improved oil extraction rates. Initial cleaning includes vibrating and flat rotary screens plus powerful magnetic separators to remove starch, corn fibers, gluten, and any metal contaminants. Moisture adjustment (to 10%-12%) and heating to about 80℃ is done in a layered softening pan to enhance the germ’s flexibility and toughness. The softened germ is then flattened into thin sheets (0.3-0.5 mm) using a double-roll mill, breaking down cell walls. Following this, steaming and frying under controlled conditions reduce moisture content to 5%-7% and heat the material to 105-110℃ for optimal oil release.


2. Pressing and Solvent Extraction: Depending on plant capacity, the oil extraction path differs. The small-scale full pressing uses screw presses to squeeze oil directly, while larger capacities employ a combination of pre-pressing and solvent extraction for deep oil recovery.


3. Refining Section (Complete with Dewaxing): Essential for producing market-ready corn germ oil, refining includes dewaxing to enhance clarity and cold stability. The process entails hydration degumming followed by disc centrifugation for impurity removal. Neutralization is primarily done via physical refining paired with deodorization, streamlining operations and cutting costs. Decolorization incorporates activated clay adsorption and vacuum filtering, resulting in clear, pale yellow oil. Dewaxing is performed through controlled freeze crystallization and filtration, progressively cooling the oil from 30℃ down to 5-10℃ to promote wax crystal formation and effective removal. Final deodorization applies high-temperature vacuum steam distillation to eliminate odors and peroxides, elevate the smoke point, and deliver a stable, pure-flavored product.

Advantages of Our Solution

• Optimized Oil Extraction Efficiency: Tailored extraction methods suited for various production scales maximize oil output and enhance profitability.


• Top-Tier Oil Quality: Comprehensive refining including essential dewaxing guarantees a crystal-clear and stable oil product even under low-temperature conditions, meeting high-end market standards.


• Durable and Dependable Equipment: Selection of premium core machinery ensures continuous, stable operation and consistent product quality throughout the production line.