Production of petroleum cokes. [with recovery of light petroleum distillates]

Patent · Mon Nov 04 00:00:00 EST 1974

OSTI ID:7186613

Hayashi, K; Nakaniwa, M; Yamamoto, M; Ozaki, K; Baba, A

A process is claimed for the production of high crystalline coke from a virgin crude oil having a sulfur content of lower than 0.4 percent by weight and substantial amounts of non-crystalline substances which prevent the growth of coke crystals which comprises removing said non-crystalline substances by: preheating the virgin crude oil in a tube heater to a temperature of 460/sup 0/--520/sup 0/C under a pressure of 5--20 kg/cm/sup 2/G; maintaining the oil in the tube heater at that temperature for 30--500 seconds to effect cracking and heat-soaking thereof; flashing the oil thus heat-treated into a first coking drum, where the oil is subjected to a first delayed coking at a temperature of 410/sup 0/--430/sup 0/C under a pressure of 2--10 kg/cm/sup 2/G for a residence time of 3--5 hours to produce a non-crystalline coke; removing from the flashed product of the first coking drum cracked gases and light petroleum fractions including gasoline, kerosene and gas oil to provide a heavy residue substantially free of said non-crystalline substances; preheating said heavy residue of the flashed product to a temperature required for a second coking stage; and introducing the preheated heavy residue into a second coking drum, where it is subjected to a second delayed coking at a temperature of 430/sup 0/--460/sup 0/C under a pressure of 4--20 kg/cm/sup 2/G to produce said high-crystalline coke.

• Assignee: Maruzen Petrochemical Co., Ltd.
• Patent Number(s): US 3959115
• OSTI ID: 7186613
• Resource Relation: Patent Priority Date: Priority date 1 Mar 1972, Japan
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
COKE
PRODUCTION
FUEL GAS
RECOVERY
PETROLEUM
COKING
PETROLEUM DISTILLATES
FUEL OILS
GASOLINE
HIGH TEMPERATURE
KEROSENE
CARBONIZATION
CHEMICAL REACTIONS
DECOMPOSITION
DISTILLATES
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
GAS FUELS
GASES
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
020500* - Petroleum- Products & By-Products