Mineral oils: processes and products – Chemical conversion of hydrocarbons – Plural serial stages of chemical conversion
Patent
1991-03-22
1992-10-06
Morris, Theodore
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Plural serial stages of chemical conversion
208 67, 208 68, 208 69, 208 74, 208 75, 208100, C10G 6904, C10G 5102, C10G 5506, C10G 6512
Patent
active
051528835
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a process for the production of high octane number gasolines. More specifically, the present invention relates to the production of improved RON and MON gasoline from heavier hydrocarbon feedstocks which come from fluidized bed catalytic cracking of vacuum gasoils, deasphalted oils and residues.
The fluidized bed catalytic cracking process of heavy hydrocarbon feedstocks such as vacuum gasoils is a well known process in particular for producing gasolines. Moreover. because of the removal of lead additives, it is very important to produce high octane number gasolines. Therefore. there is a need for producing from the same feedstocks gasolines with improved octane numbers or RON ("Research" octane number) and specifically MON ("Motor" octane number).
It is well known to subject heavy hydrocarbon feedstocks such as gasoils. vacuum gasoils or other analogues, to a fluidized bed catalytic cracking (FCC) in order to produce light products rich in olefins and hydrocarbons boiling in the range of gasolines. Heavier products are also produced such as light cycle oils (LCO) boiling between 221 and 350.degree. C., heavy cycle oils (HCO) boiling between 350 and 400.degree. C. and clarified oils (CLO) boiling at a temperature higher than 400.degree. C. More often, HCO and CLO are used as fuel components, while LCO is subjected to a hydrogenation treatment to improve its characteristics in order to be used as diesel component for example.
It is also described that there is an advantage to subject only the hydrogenated LCO to a FCC treatment with a partially desactivated FCC catalyst but it requires complicated making of the catalytic cracker which has to be used.
The Applicant has now found that there was a possibility to improve significantly the RON and MON of the gasolines produced by catalytic cracking of heavy hydrocarbons.
The present invention relates to a process for producing gasolines with improved RON and MON from heavy hydrocarbon feedstocks.
The present invention also relates to a process for producing gasolines with improved RON and MON from hydrogenated LCO. HCO and CLO.
The process according to the present invention for producing gasolines with improved RON and MON is characterized by the following steps : cracking by contacting it with a fluid catalyst of catalytic cracking in order to produce gaseous products, hydrocarbons boiling in the range of gasolines, LCO. HCO and CLO; are subjected to a hydrogenation step at a temperature comprised between 320 and 420.degree. C., at a pressure comprised between 30 and 200 bars and in the presence of a hydrogenation catalyst in order to produce gaseous hydrocarbons, hydrocarbons boiling in the range of gasolines and hydrocarbons boiling at a temperature higher than about 221.degree. C.; 221.degree. C. are separated; 221.degree. C. are subjected to a fluidized bed catalytic cracking in a reactor which is preferentially different from step (a). improved RON and MON are recovered.
The present invention is also described in an annexed drawing in which FIG. 1 represents a schematic diagram according to the process of the invention .
Referring to FIG. 1. a heavy hydrocarbon feedstock which can be gasoil, vacuum gasoil or the same, is introduced through pipe 10. This feedstock is introduced into the FCC reactor 20 in which it is contacted with a fluid catalyst of catalytic cracking coming from pipe 22. The feedstock and the catalyst are mixed together and carried upwards. The catalyst is made of fine particles so that it acts as a fluidized bed. The reaction occurs into reactor 20; the catalyst comes down by gravity and is recovered for regeneration through pipe 18 into reactor 16 while several products of catalytic cracking which comprise gaseous hydrocarbons, hydrocarbons boiling in the range of gasolines, LCO. HCO and CLO are recovered through pipe 24 and sent into a separator (25) in which gaseous and light products coming from pipe 26 are separated from heavier products coming from pipe 28. The light products which are recovered thr
REFERENCES:
patent: 2243298 (1941-05-01), Thomas
patent: 3755141 (1973-08-01), Youngblood et al.
patent: 4943366 (1990-07-01), Fischer et al.
Grootjans Jacques F.
Melin Michel
Fina Research S.A.
Hailey P. L.
Morris Theodore
Wheelington Jim D.
LandOfFree
Process for the production of improved octane numbers gasolines does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the production of improved octane numbers gasolines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of improved octane numbers gasolines will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1187019