SELECTIVE REMOVAL OF BENZENE FROM SPENT SULFUR ABSORBENTS

• Main Authors: FERRER, Gabrielle C, HENKEL, Tobias A, SPENCER, Jason E
• Format: Patent
• Language: English; French
• Published: 02.05.2019
• Subjects: ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; LIQUEFIED PETROLEUM GAS; LUBRICANTS; METALLURGY; NATURAL GAS; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE; THEIR RELEVANT APPARATUS; TRANSPORTING

As an improvement to processes for desulfurization of natural gas and synthetic natural gas streams that employ conventional zeolitic materials (absorbents), including copper-containing zeolites, pre-treatment methods and post-treatment methods are provided that lower the level of leachable benzene following desulfurization with the absorbents to <0.5 mg benzene/L leachate, while retaining within the absorbents a majority of sulfur adsorbed from a gas stream Dans le but d'améliorer les procédés de désulfuration de flux de gaz naturel et de gaz naturel synthétique utilisant des matériaux zéolitiques classiques (absorbants), comprenant des zéolites contenant du cuivre, l'invention concerne des procédés de prétraitement et des procédés de post-traitement qui abaissent le niveau de benzène lixiviable après désulfuration avec des absorbants jusqu'à <0,5 mg de benzène/l de lixiviat, tout en conservant à l'intérieur des absorbants la majeure partie du soufre adsorbé provenant d'un flux de gaz.