Recycle of oily refinery wastes
First Claim
Patent Images
1. A process for disposing of petroleum containing sludge comprising:
- (i) segregating waste oil-containing sludges into a first sludge and a second sludge, the first sludge being of high oil content relative to the second sludge and the second sludge being of high water content relative to the first sludge;
(ii) dewatering the first, high oil content sludge;
(iii) introducing the dewatered sludge into a delayed coking drum under delayed coking conditions in the presence of a liquid coker hydrocarbon feedstock to form coke;
(iv) introducing the second, high water content sludge into a delayed coking drum to quench the coke formed in the coking drum.
2 Assignments
0 Petitions
Accused Products
Abstract
Petroleum refinery waste stream sludges are recycled by segregating the sludges according to their oil content. Sludges of high oil content are developed and then injected into a delayed coking unit during the coking phase so that they are converted to coke and liquid coking products. High water content sludges are used to quench the coke during the quench phase of the coking cycle, with minimal increases in coke volatile matter. The process increases the capacity of the delayed coking unit to process and recycle refinery waste sludges and produce a coke of lower volatile content.
54 Citations
24 Claims
-
1. A process for disposing of petroleum containing sludge comprising:
-
(i) segregating waste oil-containing sludges into a first sludge and a second sludge, the first sludge being of high oil content relative to the second sludge and the second sludge being of high water content relative to the first sludge; (ii) dewatering the first, high oil content sludge; (iii) introducing the dewatered sludge into a delayed coking drum under delayed coking conditions in the presence of a liquid coker hydrocarbon feedstock to form coke; (iv) introducing the second, high water content sludge into a delayed coking drum to quench the coke formed in the coking drum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
- 12. A process for disposing of petroleum refinery sludges in a delayed coker by introducing a hydrocarbon coker feedstock into a delayed coking drum under coking conditions to produce delayed coke in the drum and quench coke produced in the drum, in which a first, dewatered petroleum of high oil content relative to a second sludge is the coker feedstock introduced into the delayed coking drum and subjected to delayed coking in the coking drum to form coke, and quenching the coke in the coking drum with the second sludge of which is of higher water content relative to the first sludge.
-
15. A process for disposing of petroleum refinery sludges in a delayed coker by introducing a liquid hydrocarbon coker feedstock into a delayed coking drum under delayed coking conditions to produce delayed coker in the drum and quenching the coke produced in the drum, which comprises:
-
(i) dewatering a first, refinery sludge of high oil content relative to a second refinery sludge which is of high water content relative to the first sludge by filtering the sludge to remove water from it; (ii) introducing the dewatered sludge into a delayed coker drum with coking feed; (iii) subjecting the dewatered sludge and coking feed to coking conditions in the coking drum to form delayed coke; (iv) quenching the coke in the drum with the second refinery sludge of higher water content relative to the first sludge. - View Dependent Claims (16, 17, 18, 19)
-
-
20. A process for disposing of petroleum refinery sludge in a delayed coker unit while producing fuels grade coke and anode grade coke, which process comprises:
-
(i) introducing a liquid hydrocarbon coker feedstock into a delayed coking drum for anode grade coke production and coking the feed under delayed coking conditions and quenching the coke produced in the drum to produce delayed anode grade coke in the drum, (ii) dewatering a first refinery sludge of high oil content relative to a second refinery sludge by filtering the sludge to remove water from it; (iii) introducing the dewatered sludge into a delayed coker drum with coking feed; (iv) subjecting the dewatered sludge and coking feed to coking conditions in the coking drum to form delayed fuels grade coke; (v) quenching the fuels grade coke in the drum with the second refinery sludge of higher water content relative to the first sludge. - View Dependent Claims (21, 22, 23, 24)
-
Specification