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US 8,946,487 B2Granted
Process for preparing divinyl ethers
AssigneeBASF SE
InventorsThomas Maidhof, Helmut Kronemayer, Georg Heinrich Grosch, Regina Vogelsang, Klaus Peter Gumbel, Tim Balensiefer, Alexey Shilkin
Life of this patent
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Abstract
Process for preparing divinyl ethers by reacting compounds having two hydroxyl groups (hereinafter referred to as diols) with acetylene, wherein the hydroxyl groups are incompletely reacted with acetylene and the resulting product mixture therefore comprises the monovinyl ether in addition to the divinyl ether and the monovinyl ether is separated off from the product mixture by extractive distillation in the presence of an extractant.
Claims17
A process for preparing a divinyl ether, comprising:
- reacting a diol having two hydroxyl groups with acetylene, wherein the hydroxyl groups are incompletely reacted with acetylene and a resulting product mixture comprises monovinyl ether and divinyl ether;
- and
- separating off the monovinyl ether from the product mixture by extractive distillation in the presence of an extractant,
- wherein the product mixture comprises from 60 to 95% by weight of divinyl ether and from 5 to 40% by weight of monovinyl ether, based on a total weight of divinyl ether and monovinyl ether, and the extractant is the diol.
1 more element
Dependencies are inferred from the claim text.