Alkylation Conversion Technology Gives Refiners Safer Options

Sept. 11, 2017
DuPont introduces DuPont ConvEx HF alkylation conversion and expansion technology.

Comparison of isobutane recycle loops

DuPont Clean Technologies (DuPont) launches DuPont ConvEx HF alkylation conversion technology, which reportedly enables refiners to convert volatile and toxic hydrofluoric acid (HF) alkylation units to the safer sulfuric acid alkylation technology. The new technology also offers refiners the opportunity for capacity increases at minimal additional cost, according to DuPont.

Historically, the expense of converting from HF to sulfuric acid alkylation was estimated by the industry at 80% of the cost of a grassroots sulfuric acid alkylation unit of a similar size, says DuPont. By reusing existing equipment, conversion with DuPont ConvEx technology is reportedly estimated to be lower – approximately 40-60% of the cost of a grassroots sulfuric acid alkylation unit. In situations where plot space is available near the existing facility, downtime can be reduced by installing new equipment during normal operations, according to the company.

Fundamental to the expansion aspect of the DuPont ConvEx technology is the difference in the way in which isobutane is recycled between the HF and sulfuric acid alkylation technologies. HF alkylation units provide all isobutane to the reaction zone by recycling it from the fractionation section, while sulfuric acid alkylation units provide half of the required isobutane from fractionation and half from the refrigeration section. This difference is significant, according to DuPont, as conversion from HF to sulfuric acid alkylation means isobutane required from fractionation is cut in half, freeing up fractionation space and, therefore, effectively doubling the capacity of the alkylation unit without requiring any significant changes to the fractionation equipment.

For more information, visit:

Sponsored Recommendations

Heat Recovery: Turning Air Compressors into an Energy Source

More than just providing plant air, they're also a useful source of heat, energy savings, and sustainable operations.

Controls for Industrial Compressed Air Systems

Master controllers leverage the advantages of each type of compressor control and take air system operations and efficiency to new heights.

Discover Your Savings Potential with the Kaeser Toolbox

Discover your compressed air station savings potential today with our toolbox full of calculators that will help you determine how you can optimize your system!

The Art of Dryer Sizing

Read how to size compressed air dryers with these tips and simple calculations and correction factors from air system specialists.