You are currently viewing: Literature

STRATCO® alkylation technology - acid settler coalescing media retrofit

Reduce acid carry, acid consumption and avoid downstream equipment failures due to acid corrosion. Following the success of integrating coalescing media throughout the alkylation unit, DuPont has now successfully incorporated coalescing media in the STRATCO® acid settler vessels. Existing acid settler vessels originally designed without coalescing media rely on gravity settling of the acid and hydrocarbon emulsion. When operating near original design conditions, the hydrocarbon product exiting the acid settler typically contains 50ppm free sulfuric acid. As Contactor feed rates and reaction temperatures continue to increase, acid carryover can go well over 50ppm and in some instances as high as 1000 ppm.

Excessive acid carryover is detrimental to downstream equipment
• Free acid that carries over can coat the inside of the Contactor™ reactor tubes causing reduced heat transfer
• Excessive acid carryover can lead to increased plugging/fouling of the tubes of the feed/effluent exchanger
• Depending upon unit configuration, carryover acid can cause plugging in the refrigerant recycle pump and/or the net effluent pump
• Effluent treating operation may also be impacted resulting in increased caustic consumption in caustic wash and alkaline water wash vessels
• Increased levels of corrosion/fouling in the deisobutanizer feed circuit

Modification of the existing acid settler to incorporate coalescing media reduces free acid carryover to less than 15 ppm. As shown in Figure  below, the acid settler coalescing media retrofit involves simple modification of the existing hydrocarbon outlet header. Two stages of coalescing media are employed to virtually eliminate free acid carryover from the acid settler.

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. ...