Auto-tandem catalytic reductive hydroformylation with continuous multiphase catalyst recycling

Insights into the Mechanism of Tandem Alkene Hydroformylation over a Nanostructured Catalyst with Multiple Interfaces.

The concept of tandem catalysis, where sequential reactions catalyzed by different interfaces in single nanostructure give desirable product selectively, has previously been applied effectively in the production of propanal from methanol (via carbon monoxide and hydrogen) and ethylene via tandem hydroformylation. However, the underlying mechanism leading to enhanced product selectivity has rema...

Preparation, Catalytic Properties and Recycling Capabilities Jacobsen’s Catalyst

Continuous Homogeneous Hydroformylation with Nanofiltration for Retention of Polymer Supported Rh Catalyst Complexes

Introduction Industrial higher olefin (> C5) hydroformylation processes require harsh temperatures and pressures (140 200 oC, 5 30 MPa) as well as tedious catalyst separation schemes involving hazardous reagents to recycle the cobalt catalyst [1]. The use of rhodium (Rh) as a catalyst would lower the operating temperature and pressure but requires almost quantitative recovery and recycle of the...

Catalytic Hydroformylation of Unsaturated Fatty Derivatives with Cobalt Carbonyl

Two cobalt-carbonyl oxo processes were developed to prepare useful products in high yield from fatty derivatives. In one process, hydroformylation in the presence of MeOH at 120 C gives dimethyl acetal esters from either methyl oleate or oleic acid. In the other, a two-step process, hydroformylation (120 C) followed by hydrogenation (180 C) gives better yields of hydroxY methyl esters from both...

On Catalytic P Systems with One Catalyst

P systems are a computational model introduced by G. Păun in [4]. One of the basic variant considered there was P systems with catalysts and priorities; these systems where shown to be computationally universal. In [2], Sośık and Freund proved that priorities among the rules can be discarded from the model without any loss of computational power. Moreover, it was shown that for extended P syste...