Chemical Decontamination of Chemical Storage Tank

Results Achieved

Benzene and hydrogen sulfide free

93 metric tons of solids removed

Zero LEL’s after 8 hours of circulation

Typical 120 day down time reduced to 11 days

Chemical profiles


Created for the dissolution and recovery of asphaltenes in process equipment, pipelines and storage tanks. Virtually eliminates the cost of disposing of asphaltene deposits as a hazardous waste.

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Rapid absorption of vapor-state hydrocarbons in an innovative encapsulant for effective decontamination and degassing of hydrocarbon processing equipment. Significantly reduces equipment outage times.

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A major petrochemical manufacturer of ethylene, propylene and benzene in Brazil used FQE™ LEL-V and FQE™ Solvent-H to successfully decontaminate and degas a product storage tank in their tank farm.


The tank contained 93 metric tons of rock-hard asphaltene tank bottoms as one solid mass. Typically, cleaning required up to 120 days using jack hammers to remove the solids. After 5 days of a bottom circulation at 77 – 82°C (170 – 180°F) with FQE Solvent-H, the tank solids were reduced to free-flowing coke.


A subsequent 12 hour circulation with FQE LEL-V resulted in a successfully degassed tank and oil-free solids. The wash water was sent directly to waste water treatment.

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