Method for synthesizing epoxy stop end butanol polyoxyethylene polyoxypropylene ether

Abstract

The invention relates to a method for synthesizing epoxy stop end butanol polyoxyethylene polyoxypropylene ether and belongs to the technical field of organic compound synthesis. A WO3 / ZrO2 catalyst is added into butanol polyoxyethylene polyoxypropylene ether; under the protection of nitrogen, epichlorohydrin is added dropwise slowly; after the reaction is over, the catalyst is filtered and recycled, epichlorohydrin is recycled through reduced pressure distillation, a chlorhydrin ether intermediate product is obtained; solid alkali and quaternary ammonium salt catalysts are added; under the protection of nitrogen, after the reaction and filtering for desalting, a neutralizer is added for neutralization, an adsorbent is added, and the refining is performed. By applying the method to synthesis of epoxy stop end polyoxyethylene polyoxypropylene ether, the catalyst is effectively recycled and reused 15 times or above, and the influence on devices and the operating environment caused by the strong acid catalyst is avoided; moreover, the balance of the stop end rate and color is achieved, and the condition indexes of finished products are also guaranteed.

Description

technical field [0001] The invention relates to a method for synthesizing epoxy-terminated butanol polyoxyethylene polyoxypropylene ether, which belongs to the technical field of organic compound synthesis. Background technique [0002] The molecule of epoxy-terminated butanol polyoxyethylene polyoxypropylene ether contains epoxy-based active groups, which has good reactivity and is mainly used in epoxy resin diluents, catalysts, cross-linking agents and chain transfer agents , chloride stabilizer, fabric finishing agent and modified silicone oil, etc., are important intermediates for the synthesis of various surfactants and important polymerization intermediates. [0003] At present, there are two main methods of epoxy-terminated polyether: [0004] The first is a one-step method, that is, a phase transfer method: polyether and epichlorohydrin are used as raw materials, and the target product is directly generated by reacting in the presence of a phase transfer catalyst an...

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Problems solved by technology

The active components of the catalyst used in the reported patent, boron trifluoride and concentrated sulfuric acid, will be lost as the reaction progresses, so the catalyst cannot be recovered. These lost catalysts will cause serious corrosion to the equipment, and the cycle life of the catalyst is limited. Moreover, the reported patents are mainly end-capped single molecules, and there is no epoxy group-terminated polyether with long chain and large molecular weight.

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