| 摘要 |
A process for dehydrating 2-methylpentanediol-2,4 to a mixture of 2-methyl-1,3-pentadiene and 4-methyl-1,3-pentadiene at elevated temperature in the presence of an acid catalyst using a polyglycol ether as a heat carrier, wherein a polyglycol ether containing from 80 to 100% by weight of a polyethylene glycol dimethyl ether of the formula CH<SUB>3</SUB>(OCH<SUB>2</SUB>CH<SUB>2</SUB>)<SUB>n</SUB>OCH<SUB>3 </SUB>where n=2-8 and from 0 to 20% by weight of a polyethylene glycol monomethyl ether of the formula CH<SUB>3</SUB>(OCH<SUB>2</SUB>CH<SUB>2</SUB>)<SUB>n</SUB>OH where n=2-8 based in each case on the total mass of polyglycol ether, is used.
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