Mild hydrocracking

Stable HDN and HDS activity throughout the cycle

In mild hydrocracking (MHC), the main objectives are to obtain a certain minimum conversion between 15–50% as well as meeting speciﬁc product properties, such as sulfur content, density, cloud point and cetane number. At typical pressures in the 60-110 bar range, meeting these parameters can be challenging and cycle lengths are often determined not by conversion rates, but by a failure to comply with specifications.

Topsoe’s range of MHC catalysts and technologies enable you to meet these challenges, whatever your product specifications. Our mild hydrocracking catalysts deliver excellent nitrogen tolerance, resulting in very stable hydrodenitrogenation (HDN) and hydrodesulfurization (HDS) activity throughout the cycle.

Our Staged Partial Conversion (SPC) hydrocracking process enables high-quality ultra-low sulfur diesel (ULSD) to be produced in an fluid catalytic cracking (FCC) pretreater. With no overtreating of the FCC feedstock, the process optimizes your hydrogen use and costs, while ensuring a stable heat balance in the fluid catalytic cracking (FCC) unit.

Catalysts for mild hydrocracking

TK-921 catalyst

An amorphous hydrocracking catalyst with high selectivity for middle distillates. It is specifically suitable for hydroprocessing of VGO streams to be used for lube oil base stock production.

TK-925 catalyst

This catalyst is optimized for maximum production of middle distillate products with very low aromatic content and excellent properties. Ideal for mild hydrocracking applications.

TK-926 catalyst

This is a catalyst with excellent selectivity to diesel. TK-926 is also ideal for mild hydrocracking applications, where high stability and excellent cold flow properties of the products are ...

TK-931 catalyst

This catalyst is a low zeolitic NiW catalyst with high selectivity for middle distillates. It provides excellent middle distillate yield with low overcracking.

TK-939 D-sel™ catalyst

This is a low zeolitic NiW catalyst with high selectivity for middle distillates. Designed for maximum diesel yields with low overcracking.

TK-969 D-sel™ catalyst

This is a zeolitic NiW based hydrocracking catalyst with very high activity and a high nitrogen tolerance. It provides balanced naphtha and middle distillate yields and is one of our recommended ...

TK-941 catalyst

TK-941 has a high selectivity to middle distillates. It can be used in applications where high cracking activity and high middle distillate yield are required, and where high light-ends yield is ...

TK-943 catalyst

TK-943 is a medium- to high-activity hydrocracking catalyst developed for maximum cold ﬂow properties of diesel.

TK-971 catalyst

TK-971 is a zeolitic NiW-based hydrocracking catalyst with very high activity.

TK-947 catalyst

TK-947 is recommended for applications where high cracking activity and high middle distillate yield are required. It is also an excellent choice for mild hydrocracking (MHC) applications.

TK-951 catalyst

TK-951 is a high-activity hydrocracking catalyst, providing optimum diesel and naphtha yields, while minimizing overcracking.

TK-961 catalyst

TK-961 is a zeolitic NiW based hydrocracking catalyst with very high activity and a very high nitrogen tolerance.

TK-949 D-sel™ catalyst

TK-949 D-sel™ is a zeolitic NiW catalyst with high selectivity for middle distillates. It provides excellent middle distillate yield with low yield of light ends.

Catalyst support

Our Catalyst Support is designed to support the combined weight of the catalyst, support material and oil. It can also withstand pressure drop over the catalyst bed during the entire catalyst ...

Inlet diffuser

Our Inlet Diffusers are designed to uniformly deliver gas and liquid to the distribution tray below, while keeping the liquid on the tray level.

Scale catcher

Our Scale Catching technology is a cost effective solution to delay pressure drop development and significantly increase unit utilization. Also reduces the amount of top grading material needed.

Outlet collector

Our Outlet Collector ensures even flow distribution in the bottom bed to maximize catalyst utilization and prevents bed migration to downstream piping and equipment.

Quench mixer

Our Quench Mixer ensures efficient mixing of catalyst bed effluents from both above and from the cold quench stream.

Redistribution tray

Our Redistribution Tray ensures uniform redistribution of the mixer effluents to the catalyst bed.

Distributor tray

Our Vapor Lift Distributor Tray (VLT) ensures uniform distribution of liquid and gas over the entire cross section area of the catalyst bed.

Back-end shift partial conversion (BES)

The one-through process that converts heavy gas oils to on-spec diesel.

Catalytic dewaxing

Our dewaxing technology radically reduces the yield loss of the diesel fraction by as much as 30% compared to conventional dewaxing technologies.

Revamping hydroprocessing units

We provide support throughout all phases of the project – from the initial idea phase to systems to solution integration and even start-up. We’ll confirm that your units meet all specifications ...

Highlights

Article

Boost your mild hydrocracking performance

Discover how Topsoe’s advanced catalyst solutions and Cepsa’s revamped MHC unit achieved 33% conversion, improved middle distillate yields, and enhanced FCC integration.

Get full details

Applications within this area

Hydrocracker feed pretreatment

Proprietary HySwell™ and HyBRIM™ technologies enable Topsoe’s hydrocracker feed pretreatment catalysts to deliver unmatched high activity for HDS and, in particular, HDN.

Maximum middle distillate yield

The hydrocracker is one of the most profitable units in your refinery. Even unconverted oil from your hydrocracker can serve as a high-quality feedstock for lube oil plants, fluid catalytic...

Renewable co-processing in hydrocracking

Get proactive support for your renewable goals without compromising on your existing hydrocracking business.

Flexible operation

We offer a profound understanding and experience with catalyst kinetics and hydrocracking processes. This enables us to provide hydrocracking units that meet any market need.

Contact us

Do you have a question about our products or solutions? Or do you want to know how our technologies can support your business? Contact our experts today.