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Sequoia Global – Delivering Expertise
Aerial view of a Sequoia used oil re-refining plant with vacuum distillation and hydrotreating units

Sequoia Energy & Environment · Since 2006

Used Oil Re-refining & Liquid Waste Recycling Plants, Engineered Worldwide

We are experts in the design of process equipment for distillation, evaporation, hydrogenation, filtration and adsorption, as applied to recycling of liquids such as used oils, waste fuels and industrial wastes.

Explore Our Technologies Request a Feasibility Study
Delivering process plants since
2006
Continents with Sequoia projects
6 of 7
Tonnes of waste recycled
1 million+
Reference projects featured
13

Who we are

With passion and precision, we deploy state-of-the-art process technologies for customers worldwide

Since 2006, Sequoia has completed projects in the USA, Europe, Asia, South America and Australia. Sequoia delivers recycling and biofuel production solutions that provide a superior return on investment. With our state-of-the-art proprietary process technologies, we deliver value from project concept to start-up.

Our technologies are world class in robustness, ease of maintenance, energy efficiency, product quality and yields. Each plant is custom designed, and Sequoia supplies the equipment and modules and helps manage the project from conception to start-up.

More about Sequoia
Sequoia process plant: 20+ years of global experience

Our expertise

Process technologies for recycling used oils, fuels, coolants and wastewater

Proprietary combinations of distillation, evaporation, hydrogenation and adsorption, designed and supplied as complete, modular plants.

Hydrogenation process flow diagram: heater, reactor, separator, compressor and column

Hydrogenation

Hydrogenation plants that produce Group II or Group III base oil from solvent neutral base stocks, vacuum gas oils or used oils, renewable diesel (HDRD) from bio-feedstocks, and PCB-free transformer oil.

Learn more about Hydrogenation

Core technologies

Four proven unit operations at the heart of every plant

  • Falling-Film & Wiped-Film Evaporation

    Proprietary long-tube vertical evaporators with no moving parts and short-path wiped film evaporators.

  • Hydrogenation of Oils & Fuels

    Hydrotreating to Group II / III base oils, renewable diesel and PCB-free transformer oil.

  • Distillation of Oil & Water

    Vacuum distillation that recovers lube base stocks, fuels and glycols at high yield.

  • Vapor Recompression

    Energy-efficient evaporation that produces boiler-feed quality water and enables ZLD.

How we deliver

From process design to plant start-up

Our engineering design centre and fabrication and assembly shop let us deliver projects on time and within budget, with process, mechanical, piping, electrical and instrumentation engineering carried out in-house.

  1. Design stage of a Sequoia project

    1. Design

    Custom process design using licensed process design, 3-D CAD piping and pressure vessel design software.

  2. Plant stage of a Sequoia project

    2. Plant

    Equipment, modules, structural steel, piping, instruments and controls supplied under one contract.

  3. Product stage of a Sequoia project

    3. Product

    Start-up support and years of operations support so the plant meets product specifications.

How we deliver expertise

News and stories

Plants operating around the world

Reference projects in Spain, Turkey, United States, United Kingdom, Uzbekistan and Argentina.

All 13 project stories

Planning a re-refining or recycling plant?

Tell us about your feedstock, capacity and location. Our engineers will advise on the right process technology, plant layout and expected economics.

Request a Feasibility Study See Our Projects