EP 0309621 A1 19890405 - Control of polynuclear aromatic by-products in a hydrocracking process.
Title (en)
Control of polynuclear aromatic by-products in a hydrocracking process.
Title (de)
Kontrolle der aromatischen polynuklearen Nebenprodukte in einem Hydrokrackverfahren.
Title (fr)
ContrÔle des sous-produits aromatiques polynucléaires dans un procédé d'hydrocraquage.
Publication
Application
Priority
EP 87308545 A 19870928
Abstract (en)
The detrimental effects of polynuclear aromatic (PNA) by-products are controlled in a catalytic hydrocracking process by (a) introducing a reduced crude into a vacuum fractionation zone to produce a vacuum gas oil stream having a tendency to form detrimental PNA compounds in a hydrocracking zone, a slop wax side stream, and a vacuum bottoms; (b) contacting the vacuum gas oil stream in a hydrocracking zone with added hydrogen and a metal-promoted hydrocracking catalyst at elevated temperature and pressure sufficient to gain a substantial conversion to lower boiling products and to form trace quantities of PNA; (c) partially condensing the hydrocarbon effluent from the hydrocracking zone and separating the same into a low boiling hydrocarbon product stream and a stream containing unconverted hydrocarbons boiling above 650 DEG F (343 DEG C) and trace quantities of PNA compounds; and (d) introducing at least a portion of the stream containing the unconverted hydrocarbons and PNA compounds into the vacuum fractionation zone, thereby recovering a substantial portion of the polynuclear aromatic compounds in the slop wax side stream which significantly minimizes the introduction of the detrimental PNA compounds into the hydrocracking zone.
IPC 1-7
IPC 8 full level
C10G 47/00 (2006.01); C10G 67/04 (2006.01)
CPC (source: EP)
C10G 47/00 (2013.01); C10G 67/049 (2013.01)
Citation (search report)
- [AD] US 4447315 A 19840508 - LAMB PAUL R [US], et al
- [A] FR 1411301 A 19650917 - GULF RESEARCH DEVELOPMENT CO
Designated contracting state (EPC)
AT BE DE ES FR GB GR IT NL SE
DOCDB simple family (publication)
EP 0309621 A1 19890405; EP 0309621 B1 19910424; AT E62925 T1 19910515; DE 3769649 D1 19910529; ES 2021720 B3 19911116; GR 3001857 T3 19921123
DOCDB simple family (application)
EP 87308545 A 19870928; AT 87308545 T 19870928; DE 3769649 T 19870928; ES 87308545 T 19870928; GR 910400477 T 19910425