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Exxonmobil Chemical Patents Inc.

Exxonmobil Engineering & Technology Company

Travis Sparks

Michael Lee Gregory

Johnathan Scott Ratliff

Robert G Tinger

Paul Podsiadlo

Scott Jeffrey Weigel

Michel Molinier

Mayank Shekhar

Joseph E Gatt

Todd E Detjen

Jeffrey L Andrews

Jocelyn A Gilcrest

Jesus A Ramos

Hari Nair

A liquid phase isomerization process comprising cofeeding molecular hydrogen at a feeding rate ≥100 ppm by weight can effectively convert a C8 aromatic hydrocarbon isomerization feed in the presence of an isomerization catalyst with a very low deactivation rate of the catalyst, even at high WHSV ≥5 hour.

Processes for isomerizing C8 aromatic hydrocarbons

Methods are provided for activation of catalysts comprising low amounts of a hydrogenation metal, such as low amounts of a Group 8-10 noble metal. The amount of hydrogenation metal on the catalyst can correspond to 0.5 wt % or less (with respect to the weight of the catalyst), or 0.1 wt % or less, or 0.05 wt % or less. Prior to loading a catalyst into a reactor, the corresponding catalyst precursor can be first activated in a hydrogen-containing atmosphere containing 1.0 vppm of CO or less. The thus first-activated catalyst can be transferred to a reactor with optional exposure to oxygen during the transfer, where it can be further activated using a hydrogen-containing atmosphere containing 3.0 vppm of CO or higher, to yield a twice-activated catalyst with high performance. The catalyst can be advantageously a transalkylation catalyst or an isomerization catalyst useful for converting aromatic hydrocarbons.

Activation of low metal content catalyst

Processes for activating precious metal-containing catalysts. The processes can decrease the amount of high purity hydrogen required for starting up a catalytic conversion process such as transalkylation of heavy aromatics, without detrimental impact to the metal activity. The processes can include a low temperature treatment step with a high purity first gas, such as hydrogen generated by electrolysis and/or reformer hydrogen diluted with high purity inert gas, and a high temperature treatment step with a low purity second gas such as the reformer hydrogen. Also, the processes can include mixing a hydrogen gas of high or low purity with a high purity inert gas to form a gas mixture with a proportion of hydrogen no less than 2% and a reduced carbon monoxide concentration relative to the low purity hydrogen, and contacting the catalyst with the gas mixture.

Transalkylation start-up processes for supported precious metal catalyst

Disclosed are utilitarian and ornamental features of fluid flow meter housing technologies. Such housing technologies comprises removable covers where such covers are associated with the meter housings without using bolts to better distribute pressure across the surfaces of the flow measurement components inside the meter. Such configuration reduces measurement component deformation over time. Further disclosed are damping elements configured to reduce noise from the measurement elements disposed inside a fluid flow meter.

Perpetual meter with noise damping

Perpetual measurement chamber

The invention is a universal receiver that addresses the problem of collecting consumption data from multiple types of utility metering wireless devices that use different and often proprietary protocols where such parameters are unknown to the system owner. The universal receiver automatically detects unknown AMR/AMI broadcasts utilizing know parameters for typical AMR/AMI signals and executing a decoding algorithm that includes series of RF parameter detection, signal characterization, signal decoding, and data qualifying techniques with minimal or no involvement needed by a user.

Universal receiver

Disclosed is fluid meter housing technology comprising removable covers where such covers are associated with meter housings without using bolts. The water meters are further designed with a 'weakest link' component configured to fail under overpressure conditions to minimize damage to more expensive metering components.

Water meter technology

Growing community of inventors

Longview, TX, United States of America

Travis Sparks