Process for the preparation of sulfated alkanol oxethylates...

C - Chemistry – Metallurgy – 07 – C

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C07C 303/24 (2006.01) C07C 305/10 (2006.01) C07C 305/18 (2006.01)

Patent

CA 1321599

HOE 88/F 902 Abstract of the disclosure Process for the preparation of sulfated alkanol oxethyl- ates or alkylphenol oxethylates having a lowered content of 1,4-dioxane A process for the preparation of sulfated alkanol oxethyl- ates or alkylphenol oxethylates is described. After com- pletion of the reaction with SO3, 0.1 to 0.5 % by weight, relative to the alkanol oxethylates or alkylphenol oxethy- lates employed, of at least one of the following compounds: water, ethanol, 1-propanol, 2-propanol or n-heptane are admixed to the reaction mixture and liquid and gas are sub- sequently separated at a temperature of 20 to 60°C. The liquid is then neutralized with aqueous alkali as customary and leads to ether sulfate/water mixtures with considerably reduced contents of 1,4-dioxane which can either be used without further aftertreatment or with a considerably re- duced outlay in terms of aftertreatment as personal hygiene agents and for various other purposes.

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