Patent ID: 7615102

Claim:
A method for inhibiting gas hydrate formation and inhibiting corrosion on and in equipment for processing and transporting hydrocarbons, said method comprising adding to the hydrocarbons a compound of formula (1) in which R 1 , R 2 are each independently C 1 - to C 22 -alkyl, C 2 - to C 22 -alkenyl, C 6 - to C 30 -aryl or C 7 - to C 30 -alkylaryl, and R 3 is M, hydrogen or an organic radical which may contain heteroatoms and has from 1 to 100 carbon atoms, A is a C 2 - to C 4 -alkylene group, B is an optionally substituted C 1 - to C 10 -alkylene group, D is an ethylene group substituted by an organic radical having from 1 to 600 carbon atoms, X, Y are each independently O or NR 4 , R 4 are each independently hydrogen, C 1 - to C 22 -alkyl, C 2 - to C 22 -alkenyl, C 6 - to C 30 -aryl or C 7 - to C 30 -alkylaryl, and M is a cation, and n is from 0 to 30.