Exxon Research and Engineering Company

Exxonmobil Upstream Research Company

Stephen D Cameron

Richard S Polizzotti

Stanley J Brois

Hubert E King

Jeenok T Kim

Elisavet P Vrahopoulou

Charles Frederick Pictroski

Marsha W French

A method, including: obtaining a grain size for amorphous silica associated with a basin and a grain size for quartz associated with the basin; obtaining kinetics of silica dissolution corresponding to the basin and quartz precipitation corresponding to the basin; determining, with a processor, a concentration of amorphous silica in water based on the grain size for amorphous silica, the grain size for quartz, and the kinetics of silica dissolution and quartz precipitation; comparing, with the processor, the concentration of amorphous silica in water to an amorphous silica saturation condition; and determining, with the processor, a presence of microquartz based on a result of the comparing.

Method for predicting occurrence of microquartz in a basin

Multifunctional molybdenum compounds, which are the reactive product of molybdenum dithiocarbamates and (non-metal containing) dihydrocarbyl dithiophosphoric acids, and the oils that contain them are new compositions which are useful as lubricant additives. They impart to the lubricant formulations to which they are added low friction and excellent friction retention properties.

Lubricating oil containing additive comprising reaction product of

This invention relates to synthetic based turbo oils, preferably polyol ester-based turbo oils which exhibit exceptional load-carrying capacity by use of a synergistic combination of sulfur (S)-based and phosphorous (P)-based load additives. The S-containing additive of the present invention is alkylthiosuccinic acid, preferably C.sub.4 -C.sub.12 linear alkyl thiosuccinic acid and the P-containing additive is one or more amine phosphate(s). The turbo oil composition consisting of the dual P/S additives of the present invention achieves an excellent load-carrying capacity, which is better than or equivalent to that obtained when each additive was used alone at a comparable treat rate to the total P/S additive combination treat rate, and this lower concentration requirement of the P and S additives allows the turbo oil composition to meet or exceed US Navy MIL-L-23699 requirements including Oxidation and Corrosion Stability and Si seal compatibility.

High load-carrying turbo oils containing amine phosphate and

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Milford, NJ, United States of America

Stephen D Cameron