Clariant Produkte (deutschland) Gmbh

Clariant Corporation

Clariant Produkte Gmbh

Uwe Dahlmann

Michael Feustel

Rainer Kupfer

Peter Klug

Dirk Leinweber

Roman Morschhaeuser

Christoph Kayser

The present invention relates to an additive, and its use for inhibiting nucleation, growth and agglomeration of gas hydrates by adding an effective amount of an inhibitor to a multiphasic mixture which tends to hydrate formation and consists of water, gas and optionally condensate, or to a drilling fluid which tends to form gas hydrates. Said inhibitor comprising dialkoxylated quaternary ammonium compounds of the formula 1 where R, Rare each independently radicals of the formulae -(A-O)&#x2014;(C)&#x2014;CO&#x2014;O&#x2014;R, Ris C- to C-alkyl or C- to C-alkenyl, Ris an organic radical which optionally contains heteroatoms and has from 1 to 100 carbon atoms, Ris an alkyl or an alkenyl, n is a number from 1 to 20, A is an alkylene group, B is an alkylene group, C is a C- to C-alkylene group and X is an anion, are used as gas hydrate inhibitors.

Additives for inhibiting the formation of gas hydrates

Corrosion and gas hydrate inhibitors having improved water solubility and increased biodegradability The invention thus provides the use of compounds of the formula (1) where

Corrosion and gas hydrate inhibitors having improved water solubility and increased biodegradability

The invention provides the use of compounds of the formula (1) where

Additives for inhibiting gas hydrate formation

The invention relates to the use of polymers which contain between 1 and 99 mol-% structural units of formula 1, wherein Rrepresents hydrogen or C-Calkyl, Rrepresents C-C-alkyl, C-C-alkylene or a C-C-aryl radical, which can be substituted with a C-C-alkyl group, A represents identical or different C-Calkylene radicals and, x, represents whole number from 2-40 in quantities from 0.01-2 wt-%, in quantities from 0.01 to 2 wt-%, in relation to the aqueous phase. The polymers can be used as gas hydrate inhibitors.

The invention provides the compounds of the formula (1) where

The invention relates to compounds of the formula (1) in which

Ether carboxylic acids based on alkoxylated styrylphenols

The invention provides a process for preparing compounds of the formula (1) where A is C- to C-alkylene, B is C- to C-alkylene, n is a number from 1 to 100, and R is C- to C-alkyl, C- to C-alkenyl, or C&#x2014; to C-aryl, by

Process for the solvent-free preparation of ethercarboxylic acids having a low residual salt content

The present invention relates to an additive, and its use for inhibiting nucleation, growth and agglomeration of gas hydrates by adding an effective amount of an inhibitor to a multiphasic mixture which tends to hydrate formation and consists of water, gas and optionally condensate, or to a drilling fluid which tends to form gas hydrates. Said inhibitor comprising dialkoxylated quaternary ammonium compounds of the formula 1 where R, Rare each independently radicals of the formulae&#x2014;(B)&#x2014;(O&#x2014;A)&#x2014;O&#x2014;CO&#x2014;Ror &#x2014;(A&#x2014;O)&#x2014;(C)&#x2014;CO&#x2014;O&#x2014;R, Ris C- to C-alkyl or C- to C-alkenyl, Ris an organic radical which optionally contains heteroatoms and has from 1 to 100 carbon atoms, Ris an alkyl or an alkenyl, n is a number from 1 to 20, A is an alkylene group, B is an alkylene group, C is a C- to C-alkylene group and X is an anion, are used as gas hydrate inhibitors.

The invention relates to an additive and to a method of corrosion inhibition on devices for the recovery and transportation of hydrocarbons in crude oil recovery and processing by adding an effective amount of an inhibitor. The inhibitor comprises an alkoxylated quaternary compounds of the formula 1 where R, Rare independently groups of the formula &#x2014;(B)&#x2014;(O&#x2014;A)&#x2014;O&#x2014;CO&#x2014;Ror &#x2014;(A&#x2014;O)&#x2014;(C)&#x2014;CO&#x2014;O&#x2014;R, Ris C&#x2014; to C-alkyl or C&#x2014; to C-alkenyl, Ris an organic radical with 1 to 100 carbon atoms optionally containing heteroatoms, Ris an alkyl or an alkenyl, n is a number from 1 to 20, A is an alkylene group, B is an alkylene group, C is a C&#x2014; to C-alkylene group and X is an anion, used as corrosion inhibitors.

Corrosion inhibitors with improved water solubility and improved film persistence

The present invention relates to compounds of formula (1) and the salts thereof which correspond to formula (2).In the formulae, A is C- to C-alkylene, x is a number from 1 to 100, y is a number from 1 to 4, and R is a cation. The compound of formula (1) and/or formula (2) forms a persistent film on metal surfaces, particularly on metal surfaces under stress in metal working and in the operation of crude oil and natural gas processing.

Ether carboxylic acids based on alkoxylated mercaptobenzothiazoles and use of the same as corrosion inhibitors

The invention relates to the use of compounds of the formula (1)in which

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Heidelberg, Germany

Uwe Dahlmann