摘要:
Ethylene glycol is produced by reacting at elevated temperature methanol, a polymeric source of formaldehyde and an organic peroxide having the formula R-O-O-R 1 wherein R and R 1 are independently either alkyl or aralkyl groups containing from 3 to 12 carbon atoms. The polymeric source of formaldehyde is preferably paraformaldehyde.
摘要:
Ethylene glycol is produced by reacting at elevated temperature methanol, a polymeric source of formaldehyde and an organic peroxide having the formula R-O-O-R 1 wherein R and R 1 are independently either alkyl or aralkyl groups containing from 3 to 12 carbon atoms. The polymeric source of formaldehyde is preferably paraformaldehyde.
摘要:
A process for the production of quinones from an aromatic alcohol is described. The process uses a hydrocarbyl hydroperoxide, e.g t-butylhydroperoxide, and a copper catalyst to effect the reaction. The use of a hydrocarbyl hydroperoxide improves the rate of reaction relative to the use of hydrogen peroxide. The process is particularly useful as a first stage in the production of 2, 3, 6-trimethylhydroquinone, a Vitamin E precursor, from cheap, readily available starting materials.
摘要:
A process for the production of quinones from an aromatic hydroxy compound is described. The process uses a hydrocarbyl hydroperoxide, e.g. t-butylhydroperoxide, a weak acid and a ruthenium catalyst to effect the reaction. The use of a hydrocarbyl hydroperoxide improves the rate of reaction relative to the use of hydrogen peroxide. The process is particularly useful as a first stage in the production of 2,3,6-trimethylhydroquinone, a Vitamin E precursor, from cheap, readily available starting materials.
摘要:
A recycle solvent for use in a metal catalysed process for the production of ethanol and/or acetaldehyde by the liquid phase reaction of methanol, carbon monoxide and hydrogen is provided. The solvent should (i) form a single phase with methanol and the liquid products of the process throughout the process; (2) be one in which the catalyst and any associated promoters are soluble; (3) have a boiling point at atmospheric pressure in excess of 120°C and (4) should be chemically stable under the reaction conditions and not interact in a deliterious manner with either the catalyst or the other components of the reaction. A preferred class of recycle solvent is sulpholane and its substituted derivatives.
摘要:
A process for the oxidation of alkanes or alkenes is described. The process uses a hydrocarbyl hydroperoxide as an oxidising agent in combination with a ruthenium catalyst and optionally a hydrogen bromide or hydrobromic acid promoter. The products of the oxidation are alcohols, ketones or a mixture of both.
摘要:
A process for the oxidation of alkanes or alkenes is described. The process uses a hydrocarbyl hydroperoxide as an oxidising agent in combination with a ruthenium catalyst and optionally a hydrogen bromide or hydrobromic acid promoter. The products of the oxidation are alcohols, ketones or a mixture of both.
摘要:
A recycle solvent for use in a metal catalysed process for the production of ethanol and/or acetaldehyde by the liquid phase reaction of methanol, carbon monoxide and hydrogen is provided. The solvent should (i) form a single phase with methanol and the liquid products of the process throughout the process; (2) be one in which the catalyst and any associated promoters are soluble; (3) have a boiling point at atmospheric pressure in excess of 120°C and (4) should be chemically stable under the reaction conditions and not interact in a deliterious manner with either the catalyst or the other components of the reaction. A preferred class of recycle solvent is sulpholane and its substituted derivatives.