You are currently viewing: Literature



IsoTherming® hydroprocessing technology

DuPont Sustainable Solutions offers IsoTherming® hydroprocessing technology, a commercially proven breakthrough process which provides refiners a significantly more economical means to produce today’s ultra low sulfur transportation fuels. DuPont acquired the technology in August 2007.

In conventional hydroprocessing technology, the reactions occur in the liquid phase. A large volume of hydrogen rich recycle gas is combined with the reactor feed to ensure that the required hydrogen for the reactions can be transferred to the liquid phase. The heart of IsoTherming® technology, Figure 1, is the ability to provide the hydrogen necessary for the reactions using a liquid recycle stream. The reactor feed is combined with the recycle stream and, when saturated with hydrogen, eliminates the need for a recycle gas compressor. The required hydrogen is delivered to the reactor in a single, liquid phase, and operating the reactor liquid-full also acts as a heat sink for the exothermic reactions. The reactor operates closer to isothermal conditions, which reduces uncontrolled cracking reactions and thus lowers light ends make.

By removing the need for hydrogen dissolution in the reactor, the process has removed any mass transfer limitation of the reactions. The reaction rates can approach their kinetic limits. As a result, the reactor can now be sized for the hydroprocessing reactions themselves rather than the dissolving of hydrogen in the reaction mixture. This change in
reactor design has a number of very attractive benefits to a refiner.

Lower total investment
Lower catalyst volumes result in correspondingly smaller reactors. Not only are capital savings realized in reactor cost and catalyst, but the elimination of the need for a recycle compressor loop and the required associated ancillary equipment: (amine absorbers, knock-out drums, heat exchangers, etc.), results in reductions of ISBL cost by 20% to 40%, depending on the application.

Other Literature

MECS®–Thermo Z™ welded plate heat exchangers

Plant engineers in the know choose MECS®–THERMO Z™ for maximum waste heat recovery and the best delivered value. MECS®–ThermoZ™ is a highly efficient heat exchanger suitable for many industrial processes where gas temperatures may be up to 1500°F (816°C). It is ...


MECS® HexWall™ Baffles

For sulfuric acid plant sulfur burners and spent Acid recovery furnaces. Interlocking hexagonal ceramic blocks for fast installation and superior structural stability. MECS® HexWall™ is a versatile, mechanically stable system consisting of a series of stackable six-sided blocks incorporating ...


MECS® - Thermo Z™ the optimum–H™ system

The ideal design solution for MECS–Thermo Z gas to gas heat exchangers to eliminate cold end corrosion. When gas temperatures and dew point conditions require maximum corrosion protection from cold spots, the Optimum-h™ System can provide a value engineered approach to raising the minimum ...


Brink® mist eliminators

Brink® solutions deliver the highest efficiencies, lowest pressure drop, and longest effective life available. From the invention of Brink® Fiber Bed Mist Eliminators in 1958, MECS® has set the standard for offering the widest array of designs and ...


MECS® Excalibur™ auto lancing systems

Thee MECS® auto lance system was developed to automatically lance new sulphuric acid re tube boilers while they're in service, cleaning fire tube boilers as efficiently as manual lancing. The MECS® Excalibur™ sequentially cleans all re tubes by opening the shutter tube. Thee automated lance ...


MECS® HexPro™ Ferrules

For waste heat boilers and heat exchangers in sulphuric acid plants. Precast, precision ceramic ferrules for severe temperature and heat-cycling conditions. Fast, Simple installation. MECS® HexPro™ Ferrules are pre-engineered for each installation and come properly sized, accurately molded, ...


STRATCO® alkylation technology

In January 2003, DuPont acquired the alkylation division of STRATCO, Inc., a leading alkylation technology licensing company servicing oil refineries throughout the world. Assets acquired include the STRATCO® brand name and technology, intellectual property, a global customer base, personnel and ...


IsoTherming® hydroprocessing technology

DuPont Sustainable Solutions offers IsoTherming® hydroprocessing technology, a commercially proven breakthrough process which provides refiners a significantly more economical means to produce today’s ultra low sulfur transportation fuels. DuPont acquired the technology in August 2007.


BELCO® clean air technologies

Belco Technologies Corporation (BELCO®), part of DuPont’s Clean Technologies portfolio, is an industry leader in the supply of air pollution control systems to the oil refining, sulfur recovery, sulfuric acid, utility, chemical, pulp & paper, marine and other industries. Since 1969, BELCO® ...


MECS® sulfuric acid and environmental technologies

Is the leading provider of proprietary process technology, speciality products and technical services to the global sulfuric acid industry. MECS® has provided best-in-class sulfuric acid plant processes, clean technologies, and specialty products to a wide distribution of industries for over 80 years. ...