Stanley M Farabee, Age 707610 Ashton Dr, Houston, TX 77095

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7610 Ashton Dr, Houston, TX 77095 (281) 858-6473

Beaumont, TX

Lexington, NC

Groves, TX

Oak Ridge, TN

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Us Patents

Method For Controlling Sedimentation In An Ebulated Bed Process

US Patent:
5156733, Oct 20, 1992
Filed:
Aug 23, 1991
Appl. No.:
7/749087
Inventors:
Govanon Nongbri - Port Neches TX
Gerald V. Nelson - Nederland TX
Stanley M. Farabee - Beaumont TX
Assignee:
Texaco Inc. - White Plains NY
International Classification:
C10G 4520
US Classification:
208108
Abstract:
In an ebullated bed process, it has been found that in switching from one sediment yielding feedstock to a second sediment yielding feedstock that the transient sediment concentration has caused unit shutdowns with lost production. A method has been found which avoids these high transient sediment concentrations. Fresh addition is substituted for regenerated catalyst addition until the average carbon on catalyst in the bed drops to 22 wt% basis carbon free catalyst. Second feedstock is added incrementally and sediment in the product analyzed. After full second feedstock rate is achieved, first feedstock is reduced incrementally with sediment analysis. Higher unit utilization is achieved with the corresponding increased yearly production.

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