Process for treating a sludge containing hydrocarbons

Patent · Tue May 03 04:00:00 EDT 1988

OSTI ID:6961083

Atherton, G A; Dickakian, G A; Grant, Jr, E D

A process for treating a steam cracker tar sludge containing liquid hydrocarbons and insoluble particles to remove the liquid hydrocarbons from the particles in the sludge is described which comprise: mixing the sludge with heptane which has a boiling point when combined with water of about 182/sup 0/F in an amount of 50% to 150% by weight of hydrocarbons in the sludge and mixing the heptane and the sludge within the range of 100/sup 0/F to 210/sup 0/F to maintain the sludge flowable and heating the sludge to remove any water present as a heptane/water azeotrope; separating the particles from the heptaneslude mixture by filtration and washing the particles with additional heptane in an amount of 20% to 500% by weight of the hydrocarbons in the original sludge; mixing the separate particles and remaining heptane with water in an amount of 250% to 700% by weight of the separated fines and recovering heptane; and removing remaining heptane by distillation to obtain a cake of treated particles containing less than 20% by weight of hydrocarbons.

• Assignee: Exxon Research and Engineering Co., Florham Park, NJ
• Patent Number(s): US 4741840
• OSTI ID: 6961083
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020800 -- Petroleum-- Waste Management
04 OIL SHALES AND TAR SANDS
040900* -- Oil Shales & Tar Sands-- Waste management
ALKANES
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DISTILLATION
HEATING
HEPTANE
HYDROCARBONS
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
MATERIALS RECOVERY
MEDIUM TEMPERATURE
MINERAL WASTES
MIXING
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
PROCESSING
PYROLYSIS
RECOVERY
REMOVAL
SEPARATION PROCESSES
SLUDGES
SOLID WASTES
TAR
THERMAL CRACKING
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
WATER