Grain & Oil Processing Machinery Explained: Pressing vs. Extraction vs. Refining

Publisher: Qi'e Grain and Oil Machinery Co., Ltd. (企鹅集团) — focused on R&D, manufacturing, sales, and service for oil pressing equipment, solvent extraction systems, and edible oil refining lines for B2B clients in Asia, Africa, and South America.

1) Oil Pressing Equipment (Mechanical Press)

Oil pressing uses mechanical force to squeeze oil from oilseeds. It is typically the first step for many plants and can be configured as cold pressing or hot pressing depending on process goals and raw material.

• What it produces: crude pressed oil + press cake (solid residue).
• When it’s used: as a standalone solution (small/medium lines) or as pre-pressing before extraction in larger plants.
• Typical focus: stable operation, easy maintenance, and process adaptability to different oilseeds.

2) Solvent Extraction Equipment

Solvent extraction uses a food-grade solvent system (commonly in closed-loop industrial setups) to wash remaining oil out of pre-pressed cake or prepared flakes—improving oil recovery for high-capacity operations.

• What it produces: crude extracted oil + defatted meal (after desolventizing).
• When it’s used: medium-to-large plants, or when maximizing oil recovery is a priority.
• Key system elements: extractor, desolventizing/toasting, evaporation/stripping, solvent recovery & safety controls.

3) Edible Oil Refining Equipment

Refining turns crude oil (from pressing and/or extraction) into edible-grade oil by removing impurities such as gums, free fatty acids, pigments, odors, and moisture—depending on the target standard and oil type.

• What it produces: refined edible oil + process by-products (varies by refining route).
• When it’s used: for most commercial edible oil products and export-oriented production.
• Common steps: degumming, neutralization, bleaching, deodorization (process design depends on oil and goals).

1. Preparation (upstream): cleaning, cracking, dehulling, flaking/cooking (selected based on raw material).
2. Pressing: produce crude pressed oil and cake; in larger plants, cake becomes feedstock for extraction.
3. Extraction: recover remaining oil from cake/flakes; recover solvent in a closed system.
4. Refining: upgrade crude oil into market-ready edible oil; match refining route to oil type and quality target.
5. Optional finishing: winterization/dewaxing, filtration, and packaging integration (as required by product specs).

• Raw material: type(s) of oilseed, typical impurities, moisture expectations, and sourcing stability.
• Target product: crude oil vs. refined edible oil; any local market or export specifications.
• Capacity planning: expected daily/annual throughput and future expansion intent.
• Utilities & site: available power, steam/thermal oil options, water, and plant layout constraints.
• Operational plan: staffing skill level, maintenance strategy, and spare parts readiness.
• Compliance & safety: especially important for solvent extraction system design and local regulatory requirements.

Start with Clear Definitions—Then Build the Right Line

If you are comparing oil pressing equipment, solvent extraction systems, and edible oil refining lines for a new plant or an upgrade, aligning the process route with your raw materials and product goals is the most reliable first step. Qi'e Grain and Oil Machinery can support you in clarifying the flow and translating requirements into a practical, implementable equipment configuration.