Corrosion and gas hydrate inhibitors having improved water...

Details Corrosion and gas hydrate inhibitors having improved water... Corrosion and gas hydrate inhibitors having improved water...

2004-02-20

2008-10-14

Anthony, Joseph D (Department: 1796)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

C560S179000, C562S553000, C562S574000, C564S152000, C564S158000, C252S390000, C252S401000, C252S403000, C507S240000, C507S241000, C507S242000, C508S255000, C585S015000

Reexamination Certificate

active

07435845

ABSTRACT:
Corrosion and gas hydrate inhibitors having improved water solubility and increased biodegradabilityThe invention thus provides the use of compounds of the formula (1)whereR1, R2are each independently C1- to C22-alkyl, C2- to C22-alkenyl, C6- to C30-aryl or C7- to C30-alkylaryl,R3is C1- to C22-alkyl, C2- to C22-alkenyl, C6- to C30-aryl or C7- to C30-alkylaryl, —CHR5—COO−or —O−,R4is M, hydrogen or an organic radical which optionally contains heteroatoms and has from 1 to 100 carbon atoms,B is an optionally substituted C1- to C10-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 NR6,R5, R6are each independently hydrogen, C1- to C22-alkyl, C2- to C22-alkenyl, C6- to C30-aryl or C7- to C30-alkylaryl, andM is a cationas corrosion and gas hydrate inhibitors, and also the compounds of formula 1.

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Co-pending U.S. Appl. No. 11/664,861, filed Apr. 5, 2007.

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