Abstract: Thickness-shear mode resonators which simultaneously measure mass deposition and fluid properties can be utilized to monitor petroleum processing, petrochemical and water treatment systems. Specialty chemical additive materials can be accurately and instantaneously added to control conditions detected by the thickness-shear mode resonators. The thickness-shear mode resonators are piezoelectric crystals used in conjunction with oscillator circuitry that can determine mass as well as viscosity and/or density of a fluid in contact with the piezoelectric surface.

Abstract: A method for the determination of organic hydroperoxides in a hydrocarbon which has been subjected to oxidative polymerization conditions is disclosed. The steps employed in the invention include mixing an organic cupric salt such as cupric acetate and a phenanthroline such as 2,9-dimethyl-1,10-phenanthroline with a sample of the hydrocarbon in an organic solvent such as acetonitrile, measuring the color change after a fixed period of time for cuprous complex formation, and comparing the measurement to the color change of a standard reference to determine the relative quantity of organic hydroperoxide in the sample.

Abstract: The premature free-radical polymerization of a non-linear, readily polymerizable organic monomer under conditions where the monomer would otherwise polymerize is inhibited by incorporating within the non-linear, readily polymerizable monomer a polymerization inhibiting amount of a fullerene or a derivative thereof.

Abstract: Generally, the invention provides a fouling probe apparatus. The fouling probe including a heat transfer conduit having a first portion formed as a loop which is removably attached to a second portion which extends linearly. A hollow housing encases the apparatus. The housing has an open forward portion and an open rear portion. The open forward portion is attachable to an oil quench tower about an opening in the quench tower and the open rear portion is adapted to be securely attached to the linearly extending second portion of the heat transfer conduit. A fouling grid is attached to the first portion of the heat transfer conduit. The fouling grid is super-heated to accelerate fouling.