7results about "Hydroxy group formation/introduction" patented technology

A method for producing a higher alcohol from a waste plastic feedstock is disclosed, comprising: (a) providing a hydrocarbon feed stream comprising a pyrolysis oil feed obtained from pyrolysis of plastic waste, wherein the pyrolysis oil comprises at least 20 wt % higher olefins with a carbon number in the range C5-C20, based on its total hydrocarbon content; (b) contacting the hydrocarbon feed stream with synthesis gas under hydroformylation conditions in the presence of a hydroformylation catalyst and recovering a hydroformylation product; (c) subjecting the hydroformylation product to hydrogenation and / or a distillation to recover a higher alcohol product.

The application discloses a novel zirconium-nitrogen coordination polymer catalyst, which has a porous structure and is prepared by a coordination self-assembly method at normal temperature from zirconium ions and non-cyclic nitrogen-containing organic ligands, only introduces Lewis acid-base sites, and does not introduce Brønsted acid sites. The presence of the Lewis acid-base sites can efficiently catalyze MPV transfer hydrogenation reaction of biomass-based aldehyde ketone compounds, the absence of the Brønsted acid sites can avoid side reactions such as etherification and acetalization, and the porous structure can greatly promote the mass and heat transfer processes during the reaction, and the synergistic effect between them further improves the yield and selectivity of the target product.

This invention discloses a chiral monophosphine ligand, its preparation method, and its application in asymmetric synthesis. The ligand preparation method involves mixing an N,N',1,2-tetrasubstituted ethane-1,2-diamine compound, phosphorus trichloride, triethylamine, and solvent under a nitrogen or argon atmosphere at -80 to -70°C, and reacting at 60 to 80°C for 6 to 8 hours. The resulting reaction mixture is then cooled to room temperature, and an alcohol, phenol, or Grignard reagent is added dropwise, reacting at 60 to 80°C for 8 to 12 hours. The resulting mixture is then post-treated to obtain the chiral monophosphine ligand. The application involves stirring a nickel catalyst, a chiral monophosphine ligand, a solvent, a diene, and an aldehyde under an argon or nitrogen atmosphere at a specified temperature for 12 to 15 hours. The mixture is then post-treated to obtain the target product. This method utilizes widely available and inexpensive raw materials, and the operation is simple, achieving high stereoselectivity and enantioselectivity in the synthesis of alcohol compounds containing chiral conjugated dienes through a one-step reaction.

The present invention provides a method for obtaining a dealkoxyphenylated product in high yield from a substrate such as a sugar bonded via an oxygen atom to an alkoxyphenyl group. By reacting a lambda 3 -iodide with a substrate bonded via an oxygen atom to a phenyl group substituted with a C1-C5 alkoxy group in the para or ortho position in a fluorine-containing alcohol and water, a dealkoxyphenylated product can be obtained in high yield under mild conditions.

Disclosed is a method for producing higher alcohols from a waste plastic feedstock, the method comprising the steps of: (a) providing a hydrocarbon feedstream comprising a pyrolysis oil feed obtained from the pyrolysis of plastic waste, the pyrolysis oil comprising at least 20 wt. % higher olefins having carbon numbers in the range of C5 to C20, based on the total hydrocarbon content of the pyrolysis oil; (b) contacting the hydrocarbon feedstream with a synthesis gas under hydroformylation conditions in the presence of a hydroformylation catalyst and recovering a hydroformylation product; and (c) subjecting the hydroformylation product to hydrogenation and / or distillation to recover a higher alcohol product.

This invention discloses an iron-catalyzed method for the hydroxylation of alkenes. The method includes the following steps: in a solvent, using nitrostyrene compounds and alkenes as substrates, peroxides as oxidants, iron as catalysts, and amino acids and their derivatives as ligands, the hydroxylation of alkenes is catalyzed to generate alkenylated alcohols. This method can synthesize alkenylated alcohols in one step, is simple, and utilizes widely available and inexpensive catalysts and oxidants. The reaction conditions are mild and highly selective. It uses 1-2 equivalents of olefin substrates, exhibiting good functional group compatibility and a wide range of substrate applicability. Drug molecules and their derivatives are compatible, achieving the hydroxylation of alkenes. Under optimized reaction conditions, the yield of the target product after separation can reach 86%.