Wells – Processes – Distinct – separate injection and producing wells
Patent
1987-10-23
1988-11-29
Novosad, Stephen J.
Wells
Processes
Distinct, separate injection and producing wells
166275, 252 8554, E21B 4322
Patent
active
047874546
ABSTRACT:
A method of producing surfactants from lignin is disclosed by reducing lignin in the presence of a carbon monoxide or hydrogen reducing agent at high temperature and pressure to produce low molecular weight lignin phenols and subjecting the lignin phenols to one or a combination of several reactions such as alkoxylation, alkylation, sulfonation, sulfation, alkoxysulfation, and sulfomethylation. The lignin surfactants so produced can be employed in a surfactant system to recover oil from underground formations.
REFERENCES:
patent: 4344487 (1982-08-01), Kalfoglou
patent: 4548721 (1985-10-01), DeBons et al.
patent: 4611659 (1986-09-01), DeBons et al.
patent: 4627494 (1986-12-01), Kalfoglou
DeBons Francis E.
Ledoux Will A.
Naae Douglas G.
Whittington Lawrence E.
Delhommer Harold J.
Kisliuk Bruce M.
Novosad Stephen J.
Park Jack H.
Priem Kenneth R.
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