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Critical solution temperature of the thermostat phosphine ligands in the two-phase Hydroformylation

Author: Cheng
Tutor: JinZiLin
School: Dalian University of Technology
Course: Organic Chemistry
Keywords: Two-phase catalysis Thermoregulated phase- separable catalysis Critical solution temperature Non-ionic surface - active phosphine ligand Hydrogen formic acid reaction
CLC: O621.25
Type: Master's thesis
Year: 2002
Downloads: 53
Quote: 0
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Abstract


This thesis by measuring the dissolution properties of the non - ionic surface-active phosphine ligand in the non - polar aprotic solvent , found P [pC 6 H 4 O (CH 2 CH 2 O) n H] 3 (PETPP) in toluene, benzene critical solution temperature (CST) characteristics , to filter out the organic solvent suitable for the separation of a homogeneous catalyst - toluene , on this basis, to achieve a non-aqueous liquid / liquid two -phase catalytic process - thermostat phase separation catalysis, to resolve the separation of the noble metal catalyst of the homogeneous catalytic provide a new way . Of emphasis on the thermostat ligand PETPP / Rh complex hydroformylation of higher olefins hydrogen catalytic activity in toluene and separation and recycling effect . The experimental results show that this system can be well catalyzed C straight chain 6-14 Hydroformylation of higher olefins , and presents the characteristics of the thermoregulated phase separation catalyzed . Under the optimum reaction conditions , 1 - decene the conversion rate and the aldehyde yield , respectively 98.7% and 96.0% , respectively . Catalyst by 10 cycles , the activity remains the same , 1 - decene conversion rate of greater than 94.9% , rhodium total loss of 3.44% (mass percentage ) ; further study found that if a molecular weight of the narrow distribution PETPP and mixed solvent enables rhodium loss of pure toluene solvent was reduced by 50% or more . This confirmed that the thermoregulated phase separation with \

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CLC: > Mathematical sciences and chemical > Chemistry > Organic Chemistry > Organic Chemistry general issues > Properties of organic compounds > Chemical properties of organic reactions
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