A selective and stable Fe/TiO2 catalyst for selective hydrogenation of butadiene in alkene-rich stream

2021 ◽  
Author(s):  
Zhao Wang ◽  
Laura Santander de Soto ◽  
Christophe Méthivier ◽  
Sandra Casale ◽  
Catherine Louis ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
High Selectivity ◽  
Good Stability ◽  
Tio2 Catalyst

The Fe/TiO2 catalyst shows high selectivity to alkenes at high butadiene conversion and good stability at 175 °C.

Selective hydrogenation of 2-pentenal using highly dispersed Pt catalysts supported on ZnSnAl mixed metal oxides derived from layered double hydroxides

2020 ◽  
Vol 10 (4) ◽  
pp. 1106-1116
Author(s):  
Huanjun Wang ◽  
Xiaocheng Lan ◽  
Shiqing Wang ◽  
Babar Ali ◽  
Tiefeng Wang
Keyword(s):  
Metal Oxides ◽  
Layered Double Hydroxides ◽  
Selective Hydrogenation ◽  
High Selectivity ◽  
Mixed Metal Oxides ◽  
Pt Catalysts ◽  
Mixed Metal ◽  
Highly Dispersed ◽  
Double Hydroxides

Highly dispersed Pt catalysts supported on ZnSnAl mixed metal oxides showed high selectivity for 2-pentenol in selective hydrogenation of 2-pentenal.

A New Supported Rhodium Catalyst for Selective Hydrogenation of Nitriles to Primary Amines

2007 ◽  
Vol 72 (4) ◽  
pp. 468-474 ◽  
Author(s):  
Peter T. Witte
Keyword(s):  
Selective Hydrogenation ◽  
High Selectivity ◽  
Rhodium Catalyst ◽  
Primary Amines ◽  
Mild Conditions ◽  
Pharmaceutical Applications ◽  
Strong Acids ◽  
Hydrogenation Of Nitriles ◽  
Supported Rhodium Catalyst

Nitriles are converted to primary amines with high selectivity using a newly developed alumina-supported rhodium catalyst. The high selectivity is obtained without any additives, which are often used to prevent the formation of higher amines. The catalyst is active under mild conditions in various solvents, which makes it specifically suitable for use in pharmaceutical applications or for other substrates that can react with additives like strong acids or bases.

High performance of Ir-promoted Ni/TiO2 catalyst toward the selective hydrogenation of cinnamaldehyde

2013 ◽  
Vol 303 ◽  
pp. 110-116 ◽  
Author(s):  
Weiwei Lin ◽  
Haiyang Cheng ◽  
Limin He ◽  
Yancun Yu ◽  
Fengyu Zhao
Keyword(s):  
Selective Hydrogenation ◽  
High Performance ◽  
Tio2 Catalyst

scholarly journals Improvement of the selectivity of isophorone hydrogenation by Lewis acids

2018 ◽  
Vol 5 (5) ◽  
pp. 171523 ◽  
Author(s):  
Yucui Hou ◽  
Shuhang Ren ◽  
Muge Niu ◽  
Weize Wu
Keyword(s):  
Organic Solvent ◽  
Lewis Acid ◽  
Selective Hydrogenation ◽  
Lewis Acids ◽  
High Selectivity ◽  
Positive Impact

The selective hydrogenation of isophorone (3,5,5-trimethyl-2- cyclohexen-1-one) to produce 3,3,5-trimethylcyclohexanone (TMCH), an important organic solvent and pharmaceutical intermediate, is of significance in industry. However, the over-hydrogenation to produce the by-product 3,3,5-trimethylcyclohexanol causes issues. Up to now, it is still a challenge to hydrogenate isophorone to TMCH with high selectivity. In this work, we found that Lewis acids could inhibit the hydrogenation of C=O bond on isophorone, thus greatly improving the selectivity towards TMCH. In addition, added solvents like supercritical CO 2 also had a positive impact on the selectivity. Both the conversion and selectivity could be increased to more than 99% when suitable Lewis acid and solvent were employed. Nevertheless, Lewis acid also exhibited some inhibition on the hydrogenation of the C=C bond of isophorone. Hence, a relatively weak Lewis acid, ZnCl 2 , is suitable for the selective hydrogenation.

Liquid-Phase Selective Hydrogenation of 1-Heptyne over Pd/TiO2 Catalyst Synthesized by One-Step Flame Spray Pyrolysis

2010 ◽  
Vol 136 (1-2) ◽  
pp. 164-170 ◽  
Author(s):  
Okorn Mekasuwandumrong ◽  
Songphon Phothakwanpracha ◽  
Bunjerd Jongsomjit ◽  
Artiwan Shotipruk ◽  
Joongjai Panpranot
Keyword(s):  
Liquid Phase ◽  
Spray Pyrolysis ◽  
Selective Hydrogenation ◽  
Flame Spray Pyrolysis ◽  
Flame Spray ◽  
Tio2 Catalyst ◽  
One Step

Research on Environmental Friendly Floatation Agent

2011 ◽  
Vol 421 ◽  
pp. 810-814
Author(s):  
Wei Wei Xie ◽  
Xiao Wei He ◽  
Kai Wu Huang ◽  
Yu Ran Zhang ◽  
Cong Kun Liu
Keyword(s):  
High Selectivity ◽  
Diesel Oil ◽  
Ash Content ◽  
Good Stability ◽  
Excellent Performance ◽  
Coal Flotation ◽  
Material Recovery ◽  
Environmental Friendly ◽  
Oil Water ◽  
Flotation Collector

A newly developed coal flotation collector EDO and its flotation characteristics for three Shanxi different coals were introduced in this paper. EDO was an emulsion composed by diesel oil, water and independent development surfactant PGS. Compared flotation experiments show that, at the same dosage, EDO gives 2~5% combustile material recovery promotion than typical collector with only a slightly ash content increment, but saving over 70% diesel oil, and improves the floatation speed. EDO could promote the dispersion of diesel oil in the slurry, so that the efficiency of floatation was improved. The flotation results showed that the EDO had the characteristics of excellent performance, high selectivity and good stability.

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