The invention relates to a method for producing latent heat storage material from linear alcohols by dehydrating to dialkyl ethers or to olefins, and hydrogenating to paraffins and dialkyl ether as a latent heat storage material.

The disclosure relates to a selective head-to-head dimerization of conjugated diene compounds by a catalytic process in a reaction medium without solvent or with solvent comprising hydrocarbons, in the presence of a specific additive of the phenol type.

The disclosure relates to a selective head-to-head dimerization of conjugated diene compounds by a catalytic process in a reaction medium without solvent or with solvent comprising hydrocarbons, in the presence of a specific additive of the phenol type.

Systems and methods for the separation of classes of paraffins from a hydrocarbon sample can include a first column comprising a first zeolite adsorbent material for the isolation of one or more n-paraffins from the hydrocarbon sample and generation of a first eluate including one or more iso-paraffins and one or more one-ring or multi-ring naphthenes. The system can further include a second column, coupled to the first column, comprising a second zeolite adsorbent material for the isolation of one or more iso-paraffins or one-ring naphthenes from the first eluate and generation of a second eluate including one or more multi-ring naphthenes.

Systems and methods for the separation of classes of paraffins from a hydrocarbon sample can include a first column comprising a first zeolite adsorbent material for the isolation of one or more n-paraffins from the hydrocarbon sample and generation of a first eluate including one or more iso-paraffins and one or more one-ring or multi-ring naphthenes. The system can further include a second column, coupled to the first column, comprising a second zeolite adsorbent material for the isolation of one or more iso-paraffins or one-ring naphthenes from the first eluate and generation of a second eluate including one or more multi-ring naphthenes.

Organosilicon Lewis acids supported on activated oxides and metal oxo complexes grafted on the organosilicon Lewis acids as heterogeneous catalysts and the related compositions, methods and systems are described. These organosilicon Lewis acids and the grafted metal oxo complexes catalyze industrially important chemical reactions including, respectively, CF bond activation and olefin metathesis reactions such as homocoupling and polymerizations.

Organosilicon Lewis acids supported on activated oxides and metal oxo complexes grafted on the organosilicon Lewis acids as heterogeneous catalysts and the related compositions, methods and systems are described. These organosilicon Lewis acids and the grafted metal oxo complexes catalyze industrially important chemical reactions including, respectively, CF bond activation and olefin metathesis reactions such as homocoupling and polymerizations.

Systems and methods for the separation of classes of paraffins from a hydrocarbon sample can include a first column comprising a first zeolite adsorbent material for the isolation of one or more n-paraffins from the hydrocarbon sample and generation of a first eluate including one or more iso-paraffins and one or more one-ring or multi-ring naphthenes. The system can further include a second column, coupled to the first column, comprising a second zeolite adsorbent material for the isolation of one or more iso-paraffins or one-ring naphthenes from the first eluate and generation of a second eluate including one or more multi-ring naphthenes.

Systems and methods for the separation of classes of paraffins from a hydrocarbon sample can include a first column comprising a first zeolite adsorbent material for the isolation of one or more n-paraffins from the hydrocarbon sample and generation of a first eluate including one or more iso-paraffins and one or more one-ring or multi-ring naphthenes. The system can further include a second column, coupled to the first column, comprising a second zeolite adsorbent material for the isolation of one or more iso-paraffins or one-ring naphthenes from the first eluate and generation of a second eluate including one or more multi-ring naphthenes.

The present disclosure provides a method and a catalyst for selective oligomerization of ethylene. The raw material for the catalyst consists of a dehydropyridine annulene-type ligand, a transition metal compound, and an organometallic compound in a molar ratio of 1:0.5-100:0.1-5000. The present disclosure also provides a method for selective oligomerization of ethylene accomplished by using the above-mentioned catalyst. The catalyst for selective oligomerization of ethylene has high catalytic activity, high selectivity for the target products 1-hexene and 1-octene, and low selectivity for 1-butene and 1-C.sub.10.sup.+.