properties of supported Ni for 1‐butene dimerization. The low concentration of Brønsted acid sites on these catalysts reduces the double bond isomerization of butene and inhibits the formation of dimethylhexene as primary product. While the alkali and alkali‐earth cations act as weak Lewis acid sites, only Ni2+ sites are catalytically active for dimerization of 1‐butene. n‐Octene and methylheptene are
Boron-fluorine chemistry. II. Reaction of boron monofluoride with acetylenes
作者:P. L. Timms
DOI:10.1021/ja01019a014
日期:1968.8
METHOD FOR PRODUCING O-XYLENE
申请人:Schindler Götz-Peter
公开号:US20090326287A1
公开(公告)日:2009-12-31
A process for preparing o-xylene comprises the steps of
a) dimerizing 2-butenes to 3,4- and/or 2,3-dimethylhexenes and
b) aromatizing the 3,4- and/or 2,3-dimethylhexenes under dehydrogenating conditions to give o-xylene
and is suitable for the selective preparation of o-xylene.