You are currently viewing: Literature



Isomalk-4 C7 paraffin isomerization technology

Isomalk-4 is a low-temperature isomerization technology for processing C7 paraffins contained in wide-range naphtha streams. In a conventional refinery configuration, C7 paraffins are distributed to the C5-C6 isomerization unit and the reformer. These components have a high X-factor that reduces the overall yield of the liquid products, lowers RON of the gasoline, and forms unwanted amounts of benzene. GTC’s innovative process allows isomerization of this hydrocarbon stream to achieve a low-RVP gasoline component with 84-86 RON, while improving the operation of the other naphtha processing units. By applying Isomalk-4, the wide-range naphtha can yield over 90 wt% liquid having a 95-98 RON, with benzene content <0.6 vol.%. This meets required gasoline specifications without any additional blending.

With Isomalk-4, refiners can realize the maximum value of the naphtha molecules, and minimize cracking and benzene formation. The naphtha stream is split into three streams. The lightest one, with <1% C7 is sent to the C5-C6 isomerization unit to yield 98-99 wt.% of 91.5-92.5 RON component. The C7 mid-cut stream is sent to the Isomalk-4 unit to achieve the equilibrium amount of diand trimethylbutanes, having very high octane. The feed to the reformer is controlled to minimize benzene precursors, cracking, and hydrodealkylation reactions, thereby improving the octane and yield.

Other Literature

Isomalk-3 - A robust n-C4 isomerization processs

A Robust n-C4 Isomerization Process. Isomalk-3 is a low-temperature isomerization technology for processing n-butane into isobutane, its branched isomer. Isobutane is an important intermediate required for the production of isobutylene or alkylate. Isobutylene can be used to produce MTBE or other high ...


GT-BTX PluS® meeting the world’s clean gasoline needs

As the worldwide refining industry becomes more intricately linked, the specifications for fuels are converging around certain common aspects. Chief among these are the environmental limits on benzene and sulfur content in motor gasoline. GTC Technology’s GT-BTX PluS provides an effective and economical ...


GT-DWC dividing wall column design saves cost and energy

GTC Technology is widely known for innovation, technical knowledge and commitment to excellence through proprietary technologies and customized solutions. Our process equipment technology offerings include the dividing wall column (DWC), which separates a multi-component feed into three or more purified ...


Isomalk-2 - A low-temperature light naphtha isomerization process

Isomalk-2 is a low-temperature isomerization technology that has been commercially proven in grassroots applications, revamps of semi-regenerative reforming units, and replacement of other isomerization technologies. This flexible process utilizes a robust platinum-containing mixed metal oxide SI-2 catalyst ...


Isomalk-4 C7 paraffin isomerization technology

Isomalk-4 is a low-temperature isomerization technology for processing C7 paraffins contained in wide-range naphtha streams. In a conventional refinery configuration, C7 paraffins are distributed to the C5-C6 isomerization unit and the reformer. These components have a high X-factor that reduces the ...


GT-TolAlk rethinking aromatics recovery

As the growth of the paraxylene (PX) market continues to be driven by increasing global demand, PX prices and margins remain strong and are expected to remain healthy over the next several years. Toluene methylation is an effective and economical solution to maximize PX yields by adding the methyl group ...


GT-Styrene® a cost-effective process for recovering styrene

In an effort to improve the production economics of naphtha cracking plants, operators must consider the recovery of valuable components from pyrolysis gasoline (pygas) over blending into the gasoline. Styrene is one such component that has far more value as a petrochemical product than as a motor fuel ...


High performance packed tower solutions

Engineered to Innovate: GTC Technology is a global licensor of process technologies and mass transfer solutions with the core mission of creating value for our clients. Refining, petrochemical and chemical companies around the world rely on our advanced technology to optimize production capacity and ...


High performance tray tower solutions

Advanced distillation column design. Revamping distillation columns requires a solid process design background, particularly when conducting evaluations of existing equipment and data. GTC advises clients to understand where they are on the reflux to theoretical stage curve prior to setting the design ...


On-line heater and boiler chemical cleaning technology

GTC’s fired heater cleaning solves common process feed heater problems. With rising pressure to reduce energy costs, GTC’s advanced fired heater/boiler chemical cleaning technology is an effective way to improve heater efficiency without shutting down plant operations. Our technology is designed ...