原料性质对正构烷烃加氢异构化选择性影响的研究

摘要

The hydroisomerization reactions of alkanes,single or mixed ones,with different struc-ture on zeolite catalyst were studied. It is found that the chain lengths of alkanes have an obvious influ-ence on the hydroisomerization selectivity of alkanes and that there is a mutual influence on isomerization reaction even between alkanes with different chain length and between normal and iso-alkanes. The data show that the longer the chain of the alkane,the more difficult to reduce the pour point of the alkane.The results indicate that long-chain n-alkanes can influence the reaction activity of the short-chain ones.The iso-alkanes in the mixed feed only influence the isomerization reactivity of the n-alkanes,but have an impact on the product distribution. At close conversion rate,the iso-product distribution of mixed material is more beneficial to reduce the pour point than that of the individual alkane.%对不同结构的烷烃在分子筛催化剂上的加氢异构化反应进行研究，考察正构烷烃链长变化对其加氢异构化选择性的影响、长链正构烷烃与短链正构烷烃之间的影响、正构烷烃与异构烷烃之间的影响。结果表明：正构烷烃的碳链越长其降凝越困难；混合原料中长链正构烷烃与短链正构烷烃相互影响、正构烷烃与异构烷烃相互影响，长链烷烃存在时会影响短链烷烃的反应活性，而异构烷烃的存在对正构烷烃反应活性无影响，但对正构烷烃的异构产物分布有影响；在转化率相当的条件下，混合原料的异构产物分布比单纯正构烷烃的异构烷烃分布更加有利于降低凝点。