Process for the preparation of ether carboxylic acids with a low setting point
AssigneeClariant GmbH
InventorsUwe Dahlmann, Rainer Kupfer, Eduard Masvidal Climent
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Abstract
The invention provides a process for the preparation of compounds of the formula (1) 1 in which A is C2- to C4-alkylene, B is C1- to C4-alkylene n is a number from 1 to 100, and R is C1- to C30-alkyl, C2- to C30-alkenyl, or C6- to C30-aryl, by alkylating a basic mixture of oxethylated alcohols of the formula 2 and alkoxides thereof with a C2- to C5-chlorocarboxylic acid, and purifying the basic intermediate obtained in this way, following acidification, by washing with aqueous sulfate solution until the ether carboxylic acid obtained in this way has a conductivity of <1000 μS/cm.
Claims8
A process for the preparation of compounds of the formula (1)
- 6
- in which
- A is C2- to C4-alkylene,
- B is C1- to C4-alkylene
- n is a number from 1 to 100, and
- R is C1- to C30-alkyl, C2- to C30-alkenyl, or C6- to C30-aryl,
- by alkylating a basic mixture of oxethylated alcohols of the formula
- 7
- and alkoxides thereof with a C2- to C5-chlorocarboxylic acid, and purifying the basic intermediate obtained in this way, following acidification, by washing with aqueous sulfate solution until the ether carboxylic acid obtained in this way has a conductivity of <1000 μS/cm.
Dependencies are inferred from the claim text.