Exxon Mobil. has filed a patent for a process to remove contaminants from refinery gas. The method involves recovering ethylene and propylene from a steam cracker effluent, compressing the process gas, determining the pressure of the refinery gas, and removing impurities to produce an upgraded gas. GlobalData’s report on Exxon Mobil gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Exxon Mobil, Microscale biofuel reactors was a key innovation area identified from patents. Exxon Mobil's grant share as of January 2024 was 65%. Grant share is based on the ratio of number of grants to total number of patents.
Refinery gas contaminant removal process
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The patent application (Publication Number: US20240034703A1) describes a process for removing contaminants from a refinery gas. The process involves recovering a process gas containing ethylene and propylene from a steam cracker effluent and a refinery gas from a refinery facility. The process gas is compressed in multiple stages, and the refinery gas is introduced into a selected compressor stage based on its pressure. The combined gas is then treated to remove impurities, such as ammonia, methanol, hydrogen sulfide, and carbon dioxide, using methods like aqueous amine or sorbent treatment. Additionally, the process includes steps for regenerating the sorbent and recovering alkane feed for further processing in the steam cracker.
Furthermore, the patent application details variations in the process, such as pre-treating the refinery gas to remove nitrogen, nitrogen oxide, and oxygen impurities before combining it with the process gas. The process also involves removing water vapor from the combined gas to produce a dried gas. Various impurities like carbonyl sulfide are targeted for removal using specific treatment methods. The application also covers the recovery of tail gas and C2+ gas, combustion of tail gas for heat production, and treatment of combustion effluent to reduce sulfur-based contaminants. Overall, the process aims to efficiently remove a wide range of impurities from refinery gas to produce an upgraded gas suitable for further processing in a steam cracker facility.
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