Catalytic dewaxing.
Improve cold flow properties and gain maximum diesel yield

Hydroprocessing renewable feedstocks is complex. From process design to choosing the optimal catalyst technology, there are many factors to consider. Our research and development programs have been focused on refining HydroFlex™ technologies for more than a decade.

This includes dewaxing which is an important factor when processing renewable feedstock where improving the diesel cold flow properties while ensuring maximum diesel yield is key to running a good business.

For FAME producers adjusting the cloud point is an almost impossible task.

One of the many benefits of hydroprocessing versus FAME is that you can gain control and adjust the cloud point. And you can minimize diesel yield loss per cloud point improvement.

You can also improve the diesel product and ensure it meets any diesel specification, and thereby is sellable, through catalytic dewaxing.

For jet fuel, dewaxing plays an even more prominent role because cloud points are lower, which means that the potential loss will be more significant. Having the right dewaxing catalysts minimizes yield loss and ensures on-spec renewable jet fuel.

Isomerization catalysts make the difference

If the temperature gets sufficiently low, there is a risk of wax crystals in the processed feedstocks which can block fuel filters and lines. The resulting fuel starvation will mean engines stop running. In other words, wax is bad for your business.

Our new generation of dewaxing catalysts are true isomerization catalysts and ensures that wax molecules are not formed when diesel is exposed to cold temperatures, which is essential in many parts of the world.

The isomerization changes long-chain n-paraffins into the same length iso-paraffins (branching). This improves cold flow properties significantly, but only shifts the boiling point slightly, keeping the compound in the diesel and jet fuel fractions.

As a result, there is hardly any loss of yield to lower boiling fractions. This significantly improves yields of higher-value diesel and jet fuel with on-spec cold flow properties.

Get the flexibility you need to deal with changing conditions

We have designed more than 150 diesel hydrotreaters that use feedstocks ranging from easy, straight-run feeds to 100% cracked feedstocks, as well as many kinds of renewable feedstocks.

Based on our worldwide comparative studies and technical documentation, we know what works and what doesn't and can help you make a well-supported decision. So, if you want to include dewaxing capabilities, we can help you analyze and compare possible configurations and recommend what is best suited to meet your exact requirements.