Max S Robbins

US Patent:

45992509, Jul 8, 1986

Filed:

Nov 19, 1982

Appl. No.:

6/442879

Inventors:

Virgil H. Cargle - Houston TX
Max L. Robbins - South Orange NJ
Jan Bock - Bridgewater NJ

Assignee:

Exxon Research & Engineering Co. - Florham Park NJ

International Classification:

B05D 700
C09K 318
C10L 900
C10L 1000

US Classification:

427220

Abstract:

A method for treating particulate solids such as coal to reduce the cohesive strength of such solids when frozen which consists of spraying said solids with a hydrocarbon liquid solution of a balanced blend of surfactants which blend will form a single phase microemulsion at 20. degree. C. when added to water at the salinity of the water on said solids at a water to hydrocarbon ratio in the range between 99:1 and 85:15, said blend represented by the monoethanol amine salt of dodecyl o-xylene sulfonic acid and a dinonylphenol reacted with 9 moles of ethylene oxide, onto the wetted surface of said solids to form a single phase microemulsion which is optimally designed to undergo a lipophilic shift upon contacting the surface of said particles whereby an in-situ water-in-oil coarse emulsion is formed on the surfaces of said particles.