|6646016||Aromatic aldehyde resins and their use as emulsion breakers|
Resins useful in methods of breaking oil-water emulsions. The resins obtained by reacting a compound of formula 1 with an aldehyde and alkoxylating, in any order: ##STR1## wherein X is --NHR1 ; --COOH; or --CONHR2 ; and is ortho-...
|5759409||Separation of water from crude oil and oil demulsifiers used for this purpose|
Water is separated from crude oil by a process in which the oil demulsifier used is a mixture of A) compounds which have demulsifying activity and are of the structure type of the (a) polyethyleneimine alkoxylate, (b) mono- or oligoamine alkoxylate, (c) alkoxy...
|4877842||Demulsifier compositions and methods of preparation and use thereof|
A composition comprising the reaction product resulting from subjecting to grafting and esterification reaction conditions a mixture comprising a polyoxyalkylene amine and a vinyl monomer. The mixture is substantially free of copolymers derived from a pol...