Adsorption process for producing ultra low hydrocarbon streams

Details Adsorption process for producing ultra low hydrocarbon streams Adsorption process for producing ultra low hydrocarbon streams

2000-03-10

2002-11-19

Preisch, Nadine (Department: 1764)

Mineral oils: processes and products

Refining

With solid catalyst or absorbent

C208S305000, C208S302000, C208S307000, C208S20800M, C208S248000, C208S297000, C208S250000, C585S820000, C585S826000

Reexamination Certificate

active

06482316

ABSTRACT:

FIELD OF THE INVENTION
The instant process is directed to an adsorption method for producing ultra low sulfur hydrocarbon streams, specifically naphthas while preserving octane.
BACKGROUND OF THE INVENTION
Due to environmental regulations the amount of sulfur present in naphtha streams must be closely controlled. The regulations will require the amount of sulfur in gasolines to be reduced to about 150 ppm by the year 2000, with further reduction to about 30 ppm by the year 2004. Thus, there is a critical need for technologies that are capable of lowering the amount of sulfur present in naphtha streams.
Present technology for lowering the amount of sulfur in naphtha streams is accompanied by an octane loss since the technology saturates the olefins present in the streams. Thus, following the sulfur removal, the streams must be isomerized to regain octane. Such processes include the Mobil-Oct Gain and UOP/Intevap ISAL processes. However, these processes have substantial yield losses and are prohibitively expensive.
SUMMARY OF THE INVENTION
The instant invention is directed to a method for reducing the amount of sulfur in hydrocarbon streams comprising the steps of:
(a) contacting a hydrocarbon stream comprising hydrocarbons and sulfur compounds with an adsorbent selective for adsorption of said sulfur compounds, under adsorption conditions capable of retaining said sulfur compounds on said adsorbent and obtaining an adsorption effluent comprising a desulfurized hydrocarbon stream,
(b) collecting said desulfurized hydrocarbon stream,
(c) desorbing said sulfur compounds from said adsorbent by passing a desorbent through said adsorbent under desorption conditions to obtain a desorption effluent comprising sulfur compounds and said desorbent,
(d) treating said desorption effluent to remove said sulfur compounds from said desorption effluent and collecting a desulfurized desorbent effluent comprising desorbent.
The process may likewise comprises step (e) recycling said desulfurized desorbent effluent of said step (d) to said step (c).
The process may alternatively comprise combining said desulfurized desorbent effluent of said step (d) with said desulfurized hydrocarbon stream of said step (b) in a mogas pool.


REFERENCES:
patent: 3182014 (1965-05-01), Seelig et al.
patent: 3450629 (1969-06-01), Sudduth et al.
patent: 3725299 (1973-04-01), Turnock et al.
patent: 3922217 (1975-11-01), Cohen et al.
patent: 4225319 (1980-09-01), Thomas
patent: 4234314 (1980-11-01), Jones et al.
patent: 4430205 (1984-02-01), Felsky
patent: 4831206 (1989-05-01), Zarchy
patent: 4831207 (1989-05-01), O'Keefe et al.
patent: 4831208 (1989-05-01), Zarchy
patent: 4835338 (1989-05-01), Liu
patent: 4952746 (1990-08-01), Johnson et al.
patent: 5082987 (1992-01-01), Olbrich et al.
patent: 5109139 (1992-04-01), Dickenson et al.
patent: 5164076 (1992-11-01), Zarchy et al.
patent: 5171923 (1992-12-01), Dickenson et al.
patent: 5212128 (1993-05-01), Schorfheide et al.
patent: 5220099 (1993-06-01), Schreiner et al.
patent: 5264187 (1993-11-01), Olbrich et al.
patent: 5271835 (1993-12-01), Gorawara et al.
patent: 5306681 (1994-04-01), Schorfheide et al.
patent: 5454933 (1995-10-01), Savage et al.
patent: 5730860 (1998-03-01), Irvine
patent: 5750820 (1998-05-01), Wei
patent: 5792897 (1998-08-01), Rosser, Jr. et al.
patent: 5807475 (1998-09-01), Kulprathipanja et al.
patent: 5843300 (1998-12-01), Zinnen et al.
patent: 5849981 (1998-12-01), Kulprathipanja
patent: 5912395 (1999-06-01), Noe
patent: 5935422 (1999-08-01), Zinnen
patent: 6126814 (2000-10-01), Lapinski et al.
patent: 0284228 (1988-09-01), None
patent: 1017576 (1952-12-01), None
patent: 707606 (1954-04-01), None

Affiliated with

Also associated with

Rating

Adsorption process for producing ultra low hydrocarbon streams does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adsorption process for producing ultra low hydrocarbon streams, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adsorption process for producing ultra low hydrocarbon streams will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2925436