Separation system for C sub 4 hydrotreater effluent having reduced hydrocarbon loss

Patent · Tue Sep 03 04:00:00 EDT 1991

OSTI ID:5687858

Haizmann, R S; Zarchy, A S; Syminiak, M F

This patent describes a process for treating a sulfurous hydrocarbon stream comprising C{sub 4} and larger hydrocarbons and containing a sulfur concentration of at least 20 ppm to convert sulfur compounds to H{sub 2}S and reduce the sulfur concentration of the hydrocarbon stream. It comprises admixing the sulfurous hydrocarbon feedstream with a hydrogen stream in a ratio of less than 50 SCFB; contacting the sulfurous hydrocarbon stream and the hydrogen in a hydrotreating zone with a hydrotreating catalyst at hydrotreating conditions to convert sulfur compounds to H{sub 2}S and produce a hydrotreated effluent stream; passing the hydrotreated effluent feedstream to a flash separator at conditions that will maintain a liquid phase containing at least 75 wt % of the H{sub 2}S and removing hydrogen from the hydrotreated effluent to produce an at least partially stabilized effluent; passing the partially stabilized effluent at liquid phase conditions to an adsorption section and contacting the stabilized effluent with an adsorbent material selective for H{sub 2}S to adsorb H{sub 2}S from the effluent stream; recovering a desulfurized hydrocarbon stream from the adsorption section; passing a regeneration gas to the adsorption section and contacting the adsorbent material with the regeneration gas to desorb H{sub 2}S from the adsorbent material; and, removing regeneration gas containing H{sub 2}S from the process.

• Assignee: UOP, Des Plaines, IL (United States)
• Patent Number(s): A; US 5045175
• Application Number: PPN: US 7-600790
• OSTI ID: 5687858
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
010408 -- Coal
Lignite
& Peat-- C1 Processes-- (1987-)
02 PETROLEUM
020400 -- Petroleum-- Processing
10 SYNTHETIC FUELS
100200 -- Synthetic Fuels-- Production-- (1990-)
CHEMICAL FEEDSTOCKS
CHEMICAL REACTIONS
COAL GASIFICATION
COAL LIQUEFACTION
DECOMPOSITION
DESULFURIZATION
FLASH HYDROPYROLYSIS PROCESS
GASIFICATION
HYDROCARBONS
LIQUEFACTION
ORGANIC COMPOUNDS
PROCESSING
PYROLYSIS
REFINING
SULFUR CONTENT
THERMOCHEMICAL PROCESSES