Inventor

FRAYER JAMES A

12 patents

Patents

12 patents

US4133777AJan 9, 1979

Hydrodesulfurization catalyst

GULF RESEARCH DEVELOPMENT CO40 citations91

US4111796ASep 5, 1978

Method for presulfiding hydrodesulfurization catalysts

GULF RESEARCH DEVELOPMENT CO27 citations81

US3968026AJul 6, 1976

Hydrodesulfurization process with parallel first stages in series with a unified second stage

GULF RESEARCH DEVELOPMENT CO22 citations81

US4173528ANov 6, 1979

Multistage residual oil hydrodesulfurization process employing segmented feed addition and product removal

GULF RESEARCH DEVELOPMENT CO13 citations72

US3968028AJul 6, 1976

Process for onstream regeneration of a hydrodesulfurization catalyst

GULF RESEARCH DEVELOPMENT CO7 citations72

US3968027AJul 6, 1976

Multi-stage hydrodesulfurization utilizing a second stage catalyst promoted with a group IV-B metal

GULF RESEARCH DEVELOPMENT CO10 citations72

US4179355ADec 18, 1979

Combination residual oil hydrodesulfurization and thermal cracking process

GULF RESEARCH DEVELOPMENT CO18 citations69

US4179354ADec 18, 1979

Combination residual oil hydrodesulfurization and catalytic cracking process

GULF RESEARCH DEVELOPMENT CO4 citations61

US4170545AOct 9, 1979

Multistage residual oil hydrodesulfurization process with an interstage flashing step

GULF RESEARCH DEVELOPMENT CO3 citations61

US4170546AOct 9, 1979

Multistage residual oil hydrodesulfurization process

GULF RESEARCH DEVELOPMENT CO4 citations61

US3968029AJul 6, 1976

Desulfurization process employing multi-catalyst reactor

GULF RESEARCH DEVELOPMENT CO2 citations61

US3968031AJul 6, 1976

Multi-stage hydrodesulfurization process utilizing multi-cycle second stage promoted catalyst

GULF RESEARCH DEVELOPMENT CO3 citations61