Process for the preparation of alkoxylates using ester compounds as catalyst
AssigneeHoechst Aktiengesellschaft
InventorsDetlef Wehle, Gernot Kremer, Ignaz Wimmer
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Abstract
According to the invention, the alkoxylation of compounds containing active hydrogen atoms is carried out in the presence of specific alkaline earth metal salts of alkylor alkenylsuccinic monoesters as catalyst. The alkoxylates obtained have a narrow homolog distribution and a good appearance.
Claims13
A process for the preparation of alkoxylates comprising alkoxylating a compound containing at least one active hydrogen atom in the presence of a catalyst wherein said catalyst contains at least one alkaline earth metal salt of an alkyl- or alkenylsuccinic monoester of the formulae (I) and (II) below ##STR2## in which R is C.sub.8 to C.sub.30 alkyl or C.sub.8 to C.sub.30 alkenyl,
- n is a number from 0 to 6,
- R.sup.1 is C.sub.1 to C.sub.18 alkyl or C.sub.3 to C.sub.18 alkenyl or hydrogen,
- if n is 1 or >1,
- M is Ba, Ca or St, and
- Y is a number from 0.9 to 1.8.
- and wherein from 10 to 70% of the titratable alkalinity of said alkaline earth metal salt of an alkyl- or alkenylsuccinic monoester of the formula (I) or (II) has been neutralized by an inorganic acid which forms salts of low solubility in water with the cations Ba, Ca or Sr.
A process for the preparation of alkoxylates comprising alkoxylating a compound containing at least one active hydrogen atom in the presence of a catalyst wherein said catalyst contains at least one alkaline earth metal salt of an alkyl- or alkenylsuccinic monoester of the formulae (I) and (II) below ##STR3## in which R is C.sub.8 to C.sub.30 alkyl or C.sub.8 to C.sub.30 alkenyl,
- n is a number from 0 to 6,
- R.sup.1 is C.sub.1 to C.sub.18 alkyl or C.sub.3 to C.sub.18 alkenyl or
- hydrogen, if n is 1 or >1,
- M is Ba, Ca or Sr, and
- y is a number from 0.9 to 1.8,
- and wherein said catalyst is formed from an alkanol and a substituted succinic anhydride and converted into the Ba, Ca or Sr salt form in the same reaction zone in which the alkoxylating step is carried out.
Dependencies are inferred from the claim text.