Renewable Diesel Production

Renewable diesel is a paraffinic hydrocarbon fuel produced by catalytically hydrotreating renewable feedstocks into straight-chain alkanes molecularly indistinguishable from premium petroleum diesel.

Common feedstocks include:

• Used cooking oils (UCO)
• Rendered animal fats, tallow, and brown grease
• Vegetable oils (soybean, canola, palm, camelina)
• Tall oil and distillers corn oil (DCO)
• Trap grease and other advanced lipid waste streams

Why HVO is winning the drop-in fuel race:

• 100% drop-in — no blending wall, no fuel system retrofits
• Superior cold-flow performance — CFPP down to –40 °C with isomerization
• 50–85% lifecycle GHG reduction vs. fossil diesel (CI score dependent on feedstock)
• Higher cetane (typically 70–90 vs. 40–55 for fossil diesel) for cleaner combustion
• Lower aromatics and near-zero sulfur, reducing PM and NOx emissions
• Compatible with existing pipelines, terminals, and engines

HVO is the only renewable diesel pathway that requires no compromise between sustainability and operability — which is precisely why refiners are converting hydrotreaters and building greenfield RDUs at record pace.

Specifying a metering pump for HVO service is not a commodity decision. The wrong choice silently costs millions in catalyst, downtime, and lost RIN/LCFS credits.

Critical specification drivers:

• Chemical compatibility — Phosphoric and citric acids, caustic soda, sulfiding agents, wash water with chloride/H₂S, and hydrogen-rich streams all demand engineered wetted materials (Alloy 20, Hastelloy C, PTFE, super duplex).
• Pressure envelope — RDU hydrogen and wash-water injection commonly exceed 1,000 psi (70 bar); high-pressure CCS and hydrogen recycle services can reach 10,000+ psi.
• Flow accuracy and turndown — Catalyst protection and product quality depend on ±1% steady-state accuracy across wide turndown ratios.
• API 675 compliance — Non-negotiable for refinery-grade installations.
• Zero fugitive emissions — Leak-tight diaphragm designs are mandatory under modern EHS, LDAR, and ESG frameworks.
• Smart diagnostics — Predictive maintenance and remote monitoring are now expected, not optional.

Why Milton Roy Primeroyal Sets the Refinery Benchmark

• Hydraulically actuated metallic and PTFE diaphragm liquid ends — zero leakage, infinite life under correct operation

• Pressures up to 20,000 psi (1,379 bar)
• ±1% steady-state accuracy across 10:1 turndown (extendable with VFD control)
• Multiplexing: up to 6 liquid ends from a single drive — one footprint, multiple injection points
• Full API 675, ATEX, IECEx, NACE MR0175 / ISO 15156 certification packages

Whether you are converting an existing hydrotreater, scoping a greenfield HVO complex, or benchmarking pump technology for your next FEED study, the resources below distill decades of Milton Roy experience in renewable fuels. 

Each was built with refinery process engineers, project managers, and reliability leaders in mind — practical, technical, and focused on what actually drives uptime, catalyst life, and project ROI.