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Water based oil dispersant

a technology of water-based oil and dispersant, which is applied in the direction of water/sludge/sewage treatment, separation devices, transportation and packaging, etc., can solve the problems of robbing havoc, mineral spirits and other hydrocarbon-based dispersants, and ineffective recovery

Inactive Publication Date: 2002-01-17
POLYCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0017] A still further object of the invention is to provide a petrochemical spill dispersant and method which is superior to existing, approved dispersants, in both effectiveness and non-toxicity.

Problems solved by technology

Recovery has proven to be extremely ineffective in that only a small portion of the oil is actually recovered, allowing the rest to reek havoc on nearby shorelines and wild life.
The use of mineral spirits and other hydrocarbon based dispersants is counterproductive in that it adds to the loading of the ocean with compounds of the same petrochemical class as the spill itself.

Method used

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  • Water based oil dispersant

Examples

Experimental program
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Embodiment Construction

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[0021] The effectiveness of a dispersant depends on the type of surfactant or surfactant combination used in the system.

[0022] If non-ionic surfactants are used, the Hydrophilic and Lipophilic Balance or HLB value of the combined system is a vital factor in producing a stable emulsion. The HLB is applicable mostly to non-ionic surfactants that are poly ethoxylated.

[0023] These HLB values range from zero (completely lipophilic or oil-loving) to 20 (completely hydrophilic or water-loving) and are calculated by dividing the weight percent of ethylene in the surfactant by 5.

[0024] An HLB range at about 3.5-10.5 forms a good water / oil emulsifier; at 10-15 has good wetting; at 10.5-18 is a good oil / water emulsifier and at 12-15 forms good detergents.

[0025] A non-ionic surfactant with a HLB value of 3.6 or 5.8 is added to an oil, then the surfactant will dissolve in the oil phase so that a clear solution is obtained. If a small quantity of water is added to this combination of oil-surfact...

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Abstract

An effective and non-toxic oil spill dispersant combines a predominately oil-soluble surfactant with a predominately water-soluble surfactant and a co-solvent for coupling a mixture of the predominately oil-soluble surfactant and the oil spill, with the predominately water-soluble surfactant. Water is included in the combination to help advance the interaction between the predominately oil-soluble surfactant and the predominately water-soluble surfactant as well as the co-solvent. The water component also helps reduce the viscosity of the dispersant to allow it to be pumped under pressure.

Description

FIELD AND BACKGROUND OF THE INVENTION[0001] The present invention relates in general to dispersing agents for dispersing oil and other petrochemicals from the surface of bodies of water, and in particular to a new and useful dispersant which is water-based and avoids the use of petroleum distillates, the major solvent in all currently US EPA approved oil spill dispersants.[0002] There are two basic mechanisms for dealing with an oil spill on a body of water, such as crude oil from a tanker at sea. One is to try and recover the oil and the other is to disperse the oil. Recovery has proven to be extremely ineffective in that only a small portion of the oil is actually recovered, allowing the rest to reek havoc on nearby shorelines and wild life.[0003] Currently, the United States Environmental Protection Agency (EPA) permits the use of only four commercially available dispersants to disperse oil spills. Two of them are known by the trade name COREXIT and are available from Nalco / Exxon...

Claims

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Application Information

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IPC IPC(8): C02F1/68C09K3/32C09K23/00C09K23/22C09K23/34
CPCB01F17/0085C02F1/682C09K3/32Y10S210/925C09K23/017
Inventor JACOB, SAVARIMUTHU M.BERGMAN, ROBERT E. JR.
Owner POLYCHEM