Cottonseed hot press: 110-130°C cook + 80-110°C press, dark crude → NBD refining

Hot-press sequence

Six-step hot-press flow with parameters

Post-press chain

Crude oil and cake handling

• Crude oil: dark red/brown, FFA 1-3%, gossypol ~0.04% free + 0.5-1.5% bound. Settle 24-48 h in jacketed tank → 200-300 mesh plate-frame filter → buffer tank → refining feed.
• Refining (NBD): degum (phosphoric acid 0.05-0.1%) → neutralize (caustic soda) → bleach (activated clay 1-2%) → deodorize (240-260°C × 30-60 min vacuum). Reduces free gossypol to <0.045% per FAO/WHO.
• Cake: 6-9% residual oil + 23-35% protein (with hulls) or 41-44% (decorticated meal). Hot cake discharge → cooler → 25/50 kg bagger or bulk silo for ruminant feed (gossypol-tolerant).
• Hulls: ruminant feed (high fiber), boiler fuel, or particle board feedstock. Hull handling area 50-100 m² for 10-30 t/d line.
• Capex by scale: 10-30 t/d gin-side $80-150k Phase 1; 50-100 t/d mill $300-600k including refining; pilot 1-3 t/d $30-60k.

Project boundary

What to confirm before scoping Cottonseed Hot Press | Cook 110-130°C, Press 80-110°C, Yield 14-18%, Gossypol Reduction

Cottonseed Hot Press | Cook 110-130°C, Press 80-110°C, Yield 14-18%, Gossypol Reduction should not be quoted from an equipment name alone. Check feed lots, target oil, post-press handling, and packing rhythm in one scope before deciding which Cottonseed Oil Press modules stay. Cottonseed is almost always 300/325 hot press + cook + mandatory refining (gossypol).

When feed condition, moisture, impurities, batch weight, and product position are unclear, press tonnage and filter area become guesswork. Factory systems share 60 MPa and 2.2 kW motors; hot pure press is 30–40 min/barrel and cold pure press is ~2 h/barrel — cycle time matters more than brochure tonnage.

• Confirm whether feed is whole seed, kernels, pretreated material, or an existing semi-finished stream.
• Confirm whether the target is crude oil, filtered oil, bottled oil, drum ingredient oil, or a refining handoff.
• Hot cycle reference: pure press 30-40 min/barrel, ~1.5 h for 2 barrels with loading; cold pure press ~2 h/barrel, ~4.5 h for 2 barrels.
• Confirm batch rhythm, labor, changeover, retained samples, power (often 380V/50Hz/3ph), and site install conditions.

Factory model check

Match hot / cold models to factory hard data

Pin models to published factory specs before tonnage talk.

Hot 300/325: 300–325 ton, 60 MPa system, standard barrel Ø390×800 mm / max 100 kg, pure press 30–40 min/barrel, ~1.5 h for 2 barrels with loading, 2.2 kW motor. Cold 355/400/426/480/500: 370–630 ton, integrated frame, same 100 kg standard barrel, pure press ~2 h/barrel, ~4.5 h for 2 barrels with loading; optional Ø300 high-pressure barrel max 60 kg. Residual oil target ~≤5% (peanut hot often 6–8% measured).

• Standard barrel Ø390×800 mm, max ~100 kg crushed feed; optional Ø300 high-pressure barrel max ~60 kg.
• Cylinder material 27SiMn; cold frames are integrated molded steel; hot frames are typically H-type channel steel.
• Cottonseed is almost always 300/325 hot press + cook + mandatory refining (gossypol).

Equipment check

project scope needs to land in equipment interfaces

Once the route is clear, write the interfaces: how preparation feeds the press, how oil leaves the press, how filtration connects to tanks, and how packing receives finished oil.