New method for preparing 1,3-dioxolane by catalytic condensation

A technology of dioxolane and catalytic condensation, applied in the direction of organic chemistry, can solve the problems of easy pollution of the environment, strong corrosion, and use restrictions, and achieve the effects of high catalytic efficiency, low equipment requirements, and fast reaction rate
CN102174033AInactive Publication Date: 2011-09-07TIANJIN JIULIAN TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TIANJIN JIULIAN TECH CO LTD
Publication Date
2011-09-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a new method for preparing 1,3-dioxolane by catalytic condensation, which comprises the following step of: enabling glycol and formaldehyde (trioxymethylene, paraformaldehyde or 37% formalin) to be subjected to condensation reaction under the catalysis of silica gel-supported phosphotungstic acid. The 1,3-dioxolane prepared by the method provided by the invention can be used as a solvent of grease, polymers, coatings and bonding agents, an extracting agent of wax and medicaments (vitamins and the like), a solvent for lithium battery electrolytes, a chlorine-based solvent stabilizing agent, a medicament intermediate or the like. The invention has the advantages that the process is simple, the catalytic efficiency is high, the catalyst dose is little, the reaction rate is high, the yield is high, the equipment requirement is low, a catalyst can be easily recovered and can be reused, and large-scale commercialized preparation and production can be realized, thereby meeting the currently increased market demand.
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Description

technical field

[0001] The invention relates to a novel catalytic condensation preparation method of 1,3-dioxolane. Background technique

[0002] 1,3-Dioxolane is used more and more widely because of its strong water solubility and good solvency. Mainly used as solvents, detergents and extractants for oils and polymers, electrolytic solvents for lithium batteries, chlorine-based solvent stabilizers, pharmaceutical intermediates, etc. Ru 2036919 etc. have reported that ethylene glycol and formaldehyde react in the presence of an acidic catalyst to generate 1,3-dioxolane. The shortcoming of this method is that the commonly used catalyst is an inorganic acid (such as H 2 SO 4 , HCl, p-MeC 6 h 4 SO 3 H, etc.), not only have many side reactions, but also are highly corrosive and easy to pollute the environment, so that their use is limited.

[0003] Heteropolyacid (HPA) is an oxygen-containing multi-component composed of central atoms (such as P, Si, As, Ge, etc.) and coord...

Claims

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