Method of making 2,6-dimethylnaphthalene from other dimethylnaphthalene isomers and from dimethyltetralins/dimethyldecalins with a methyl group on each ring

摘要

The invention discloses a method of making 2,6-dimethylnaphthalene from any DMN with one methyl on each ring in a two-step hydroisomerization/dehydrogenation process. The catalyst used in the hydroisomerization step is an acidic catalyst such as a silica aluminum catalyst with a hydrogenation/dehydrogenation metal. The catalyst used in the dehydrogenation step is a reforming type catalyst.