Process for improving products quality and yields from delayed coking
This patent describes a delayed coking process comprising of a coker fractionator, coker heater and coke drums wherein a coker fresh feed consisting of petroleum hydrocarbon derivatives from various refining processes is thermally processed in the heater and coke drums producing green coke, hydrocarbons and gases. It comprises: adding hydrogen-rich gas in the absence of a catalyst to the coker heater charge material in a soaking pipe with a fluid residence time in the range of about 10 to 90 minutes in an amount in the range of about 30 to 300 SCF per barrel of the heater charge material under an inlet hydrogen partial pressure in the range of about 200 to 650 psig from an inlet operating temperature in the range of about 400{degrees} F. to 650{degrees} F. to an outlet operating temperature in the range of about 50{degrees} F. to 250{degrees} F. cooler than the inlet operating temperature range to minimize a formation of converted asphaltenes and feeding the coker heater feed material thus hydrogenated directly into the coker heater without separating any constituents from the heater feed material thereby improving the quality and yields of products from the process.
- Assignee:
- NOV; NOV-90-029036; EDB-90-152969
- Patent Number(s):
- US 4919793; A
- Application Number:
- PPN: US s 7-232761
- OSTI ID:
- 6571962
- Resource Relation:
- Patent File Date: 5 Aug 1988
- Country of Publication:
- United States
- Language:
- English
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Delayed coking process
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