Process utilizing pyrolyzation and gasification for the synergistic co-processing of a combined feedstock of coal and heavy oil to produce a synthetic crude oil
OwnerReginald D. Richardsoninventor
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Abstract
An energy integrated process for the production of a synthetic crude oil product from heavier oils and coal in which coal is pyrolyzed and a combined feedstock of coal, coal volatiles and a heavy oil product is co-processed to produce a synergistic yield of light crude oil compatible with the refining capabilities of existing conventional refineries.
Claims37
A process for the production of a synthetic crude oil by co-processing non-coal heavy oil and coal comprising the steps of:
- (1) producing coal volatiles and a hydrocarbon residual by thermal pyrolysis of a first allotment of crushed coal using temperatures that avoid thermal degradation of the coal volatiles;
- (2) gasifying said hydrocarbon residual to produce a synthesis gas in first gasifiers moderated by one or more of the group consisting of air, oxygen or oxygen enriched air;
- (3) utilizing the sensible heat in said synthesis gas to effect the said thermal pyrolysis of said crushed coal and produce said coal volatilies;
- (4) condensing the condensible coal volatiles from the synthesis gas and mixing the coal volatiles with a second allotment of crushed coal and a non-coal heavy oil to produce an upgrader feedstock;
- (5) upgrading said feedstock by hydrogen addition comprising hydrogenation and catalytic hydrocracking to produce an upgrader lighter crude oil, an upgrading residual, and an upgrading off gas.
A process as claimed in 9 which comprises the additional steps of:
- (8) gasifying a first portion of said upgrading residual in second gasifiers moderated with oxygen to produce a slag waste residual and hot gases containing hydrogen;
- (9) water quenching said hot gases to recover the hydrogen therefrom for use in said hydrogen addition upgrading;
- and,
- (10) utilizing a second portion of said upgrading residual as feed to said first gasifiers for synthesis gas production.
A process as claimed in claim 28 wherein the process comprises the additional step of upgrading a non-coal heavy oil feed by distillation to produce said light ends of non-coal heavy oil for blending and non-coal heavy oil residual bottoms for use as the non-coal heavy oil constituent of said upgrading feedstock.
Dependencies are inferred from the claim text.