Fat, Oil & Residual Oil

Extraction route determines residual oil

Solvent extraction leaves very little oil; mechanical pressing leaves considerably more. The two are different products commercially even when crude protein looks similar, and they behave differently in pelleting, storage and shelf life.

Fat is an energy claim and a stability liability

Residual oil raises metabolisable energy but also introduces oxidation risk. High-fat meals and marine ingredients should carry an antioxidant declaration, and their oxidation indices should be verified at origin and again if the cargo has been stored.

常见行业参考值

Solvent-extracted meals	0.5–2.5%	Residual oil after extraction
Expeller / cold-pressed meals	5–12%	Higher energy, shorter shelf life
Full-fat soybean	17–20%	Requires urease control
Fish meal	6–12%	Antioxidant treatment normally required

Indicative industry reference values for orientation only — always contract against the delivered lot.

应核实事项

—Extraction route stated on the specification
—Antioxidant type, dose and treatment date for high-fat and marine ingredients
—Peroxide value, anisidine value and free fatty acids at the point of transfer of risk

常见风险

—Rancidity and palatability loss
—Energy value drifting from the formulation matrix
—Self-heating in bulk storage

常见错误

—Comparing expeller and solvent-extracted meals on protein alone
—Buying high-fat marine ingredients without an oxidation panel

常见问题

Why do expeller meals often carry a premium?

They deliver higher energy and are accepted in some non-solvent or organic supply chains. That premium is only justified when the oil is fresh and adequately protected against oxidation.