Demetallizing and decarbonizing heavy residual oil feeds
AssigneeAshland Oil, Inc.
InventorsLloyd E. Busch, Gerald O. Henderson
Life of this patent
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Abstract
The method and means for effecting selective visbreaking of residual oil feeds comprising metallo-organic compounds with a fluid solid sorbent particle material in the presence of process sour water and wet gas recycle material is described to provide a gas oil rich product more suitable for crystalline zeolite fluid catalytic cracking operations.
Claims17
In a process for visbreaking a residual oil portion of a crude oil with solid sorbent particle material of little or no catalytic cracking activity to produce a demetallized and decarbonized product comprising gas oils suitable for crystalline zeolite catalytic conversion to gasoline boiling range material, the improvement which comprises, contacting the residual oil portion of a crude oil with an initially formed upflowing high temperature suspension of solid sorbent particulate material in a normally gaseous C.sub.4 minus product of the process rich in hydrogen in a time-temperature relationship particularly accomplishing hydrovisbreaking of 566.degree. C. (1050.degree. F.) plus boiling material to produce material boiling below 552.degree. C. (1025.degree. F.) comprising decarbonized and demetallized gas oil boiling range product without substantial restriction on the amount of thermal naphtha produced, restricting the contact time between solids and charged residual oil to less than 2 seconds in the upwardly flowing suspension and;
- recovering a vaporous gas oil containing product of the visbreaking operation at a temperature in the range of 516.degree. C. (960.degree. F.) to 593.degree. C. (1100.degree. F.) separated from a major portion of the solid sorbent material.
In a process for selectively hydrovisbreaking reduced crude to produce increased yield of materials boiling below 552.degree. C. (1025.degree. F.) comprising gas oils, the improvement which comprises, forming an upflowing high temperature suspension of clay-type solid sorbent particle material in a C.sub.4 minus gaseous stream comprising hydrogen in the lower portion of a riser contact zone, adding sour water to a reduced crude oil feed to form a mix temperature thereof in the range of 149.degree. C. to 260.degree. C. (300.degree. F. to 500.degree. F.) before contact thereof with said upflowing high temperature suspension comprising solid sorbent particles in said riser contact zone, maintaining said reduced crude in contact with said solid sorbent for a time in the range of 0.5 up to 2 seconds before separating vaporous gas oil containing products of said selective visbreaking operation from solid sorbent material, separating a C.sub.4 minus product stream rich in hydrogen and a sour water stream for reuse in the process from vaporous hydrocarbon products boiling below 552.degree. C. (1025.degree. F.), and recovering decarbonized and demetallized hydrocarbon products of said visbreaking operation.
A method for upgrading a residual portion of crude oil comprising components boiling above 552.degree. C. (1025.degree. F.) which comprises, forming a upflowing suspension of catalytically spent solid sorbent particle material recovered from a regeneration zone at a temperature in the range of 760.degree. C. to 871.degree. C. (1400.degree. F. to 1600.degree. F.) in a C.sub.4 minus reducing wet gaseous product stream, charging said residual portion of crude oil admixed with sour water and providing a mix temperature thereof below about 260.degree. C. (500.degree. F.) in contact with said upflowing suspension of solid sorbent material providing a ratio of solid sorbent particles to oil feed in a ratio of 5-15 to 1 for a contact time less than 2 seconds, recovering a product stream of said thermal conversion operation at the discharge of a riser contact zone at a temperature below 593.degree. C. (1100.degree. F.) and effecting immediate separation thereof into a vaporous product stream and a stream of solid particles comprising metal deposits admixed with carbonaceous deposits, quenching vaporous products separated from solid particles and recovering the quenched vaporous products for separation and recovery of C.sub.4 minus wet gaseous material and a sour water product from higher boiling hydrocarbons comprising gas oils, and passing separated solid particles to a regeneration zone for removal of carbonaceous products by combustion thereby heating the particles to an elevated temperature suitable for forming said suspension.
A method for decarbonizing and demetallizing a residual oil product of crude oil distillation comprising metallo-organic compounds and Conradson carbon producing components boiling above 566.degree. C. (1050.degree. F.) which comprises, contacting said residual oil product with a formed high temperature suspension of C.sub.4 minus wet gas comprising hydrogen and a solid sorbent fluid particulate of little if any catalytic activity in a riser contact zone under operating conditions of space velocity, time of hydrovisbreaking of multi-ring hydrocarbon components boiling above 566.degree. C. (1050.degree. F.) to lower order ring compounds boiling below 566.degree. C. (1050.degree. F.) in the absence of imposing a substantial restriction on the production of thermal naphtha, recovering a product of said hydrovisbreaking operation separated from solid sorbent particulate comprising gas oil boiling range components reduced in metal contaminants and Conradson carbon producing compoenets, and removing carbonaceous products of said visbreaking operation from separated solid sorbent particulate by combustion in a regeneration zone.
In a process for upgrading high boiling hydrocarbons comprising metal contaminants and/or Conradson carbon producing components boiling above 566.degree. C. (1050.degree. F.) by non-catalytic thermal visbreaking, the improvement which comprises, forming a upflowing suspension from solid sorbent particle material at a regeneration temperature in the range of 760.degree. C. to 871.degree. C. (1400.degree. F. to 1600.degree. F.) admixed with a hydrogen containing wet gas C.sub.4 minus product of the visbreaking operation in a bottom portion of a riser contact zone of high solids content, admixing sour water obtained from the visbreaking process with said high boiling hydrocarbon to form a mix temperature thereof in the range of 149.degree. C. to 260.degree. C. (300.degree. F. to 500.degree. F.), passing said sour water-high boiling hydrocarbon mixture in contact with said upflowing suspension for a time restricting the temperature at the riser outlet within the range of 510.degree. C. to 566.degree. C. (950.degree. F. to 1050.degree. F.) whereby substantial hydrovisbreaking of the 566.degree. C. (1050.degree. F.) plus components to components boiling below 566.degree. C. (1050.degree. F.) is accomplished by at least 90 percent, separating and recovering vaporous hydrocarbons of said hydrovisbreaking operation from solid particle sorbent material, and regenerating solid sorbent particles by combustion of carbon containing deposits of said hydrovisbreaking operation.
Dependencies are inferred from the claim text.