2134-29-4Relevant articles and documents
Method for preparing 3-hydroxypropionaldehyde by hydrating acrolein
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Paragraph 0050-0059, (2020/12/31)
The invention relates to a method for preparing 3-hydroxy propionaldehyde by hydrating acrolein. The acrolein is homogeneously catalyzed under the action of a N-heterocyclic carboxylic acid ionic liquid to prepare 3-hydroxy propionaldehyde, wherein the hydration reaction liquid is subjected to aqueous two-phase extraction to recover the ionic liquid catalyst for cyclic utilization. According to the invention, the method is simple to operate and stable in process, the catalyst has very high reaction activity and very good selectivity, and the problems of separation of a homogeneous catalyst andinstability and easy deactivation of a solid catalyst in the hydration process are effectively solved.
Substrate inhibition in ruthenium(III) catalyzed oxidation of propane-1,3-diol by periodate in acidic medium: A kinetic study
Koteswara Rao,Nadh, R. Venkata,Ratnam, K. Venkata
, p. 1569 - 1575 (2020/07/30)
Ruthenium(III) catalyzed oxidation of propane-1,3-diol by potassium periodate was studied in aqueous perchloric acid medium. Orders of reaction with respect to concentrations of oxidant, substrate, acid and catalyst were determined. First order in oxidant and catalyst concentrations, and inverse fractional order in acid medium were observed. In addition, substrate inhibition (i.e. a decrease in reaction rate with an increase in substrate concentration) was observed. Effect of addition of salt and solvent was studied. Based on the studies of temperature variation, Arrhenius parameters were calculated. Plausible mechanism was also proposed based on observed kinetics.
Catalytic glycerol hydrogenolysis to 1,3-propanediol in a gas-solid fluidized bed
Edake, Mahesh,Dalil, Marjan,Darabi Mahboub, Mohammad Jaber,Dubois, Jean-Luc,Patience, Gregory S.
, p. 3853 - 3860 (2017/02/05)
Glycerol is a potential feedstock to produce 1,3-propanediol (1,3-PDO), which is a valuable commercial polyester monomer. Here, we report the gas-phase glycerol hydrogenolysis to 1,3-propanediol over Pt/WO3/Al2O3 in a fluidized bed operating above 240 °C and at ambient pressure. Fluidized beds are ideal contactors for this reaction because the heat transfer rates are sufficiently high to vaporize glycerol thereby minimizing its combustion and thermal degradation. The yield of 1,3-PDO approached 14% after 2 h at 260 °C. The major co-products were 1,2-PDO (18%), 1-propanol (28%) and 2-propanol (15%). In the first step, glycerol may dehydrate to acrolein, followed by rehydration to 3-hydroxypropanal and then hydrogenation to 1,3-PDO. The concentrations of the by-products including acrolein, ethylene glycol, propane, and acetone increased with increasing temperature.