Reaction device used for producing polyoxyethylene and process thereof

Abstract

The invention relates to a reaction device used for producing polyoxyethylene and a process thereof. The reaction device is composed of a kettle body (1), a stirrer (2), a motor (6), a nozzle (9), a jacket (10), a bubbling device (15) and a reaction kettle cover (19), wherein the reaction kettle cover covers the kettle body; a flat coiled pipe (11) is arranged on the outer wall of the kettle body; the jacket is arranged outside the kettle body; the stirrer (2) is arranged on a middle shaft of the kettle body (1); a stirring blade is arranged on the stirrer; a second stirring blade (4) is connected with a wall scraping device (12) through a spring (13); the nozzle (9) is welded on a stirring shaft of the stirrer; and the bubbling device (15) is arranged on the inner wall of the bottom end of the kettle body. The process for producing polyoxyethylene by using the device provided by the invention comprises preparation of a catalyst, modification of the catalyst, aging of the catalyst and preparation of polyoxyethylene. The reaction device has the following advantages that materials can be in sufficient contact so that a molecular weight distribution range of a polyoxyethylene product is relatively narrow and the quality of a polyoxyethylene product is improved; and a catalyst reaction and a polymerization reaction in the production of polyoxyethylene are carried out in the same reaction device so that the heat exchange speed and the production efficiency are greatly improved.

Description

technical field [0001] The invention relates to a reaction device and a polymer preparation process using the device, in particular to a reaction device for producing polyethylene oxide and a process thereof. Background technique [0002] Polyethylene oxide is formed by ring-opening polymerization of ethylene oxide under the action of a catalyst. Generally, products with a molecular weight of less than 20,000 are called polyethylene glycol (PEG), which is liquid or waxy solid; those with a molecular weight greater than 20,000 The product is called Polyethylene Oxide (PEO) and is a powdery flowable solid. Polyethylene oxide is widely used in the fields of pharmaceuticals, papermaking, and daily chemicals. At present, most of the mature industrial production technologies are owned by foreign countries. my country started relatively late, and currently there are few manufacturers that have realized industrial production. [0003] The catalyst used in the polymerization reactio...

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Problems solved by technology

[0005] The object of the present invention is to provide a reaction device and its process for producing polyoxyethylene in order to improve the deficiencies of the prior art; to solve the problem that the reaction materials cannot be fully contacted in the production of polyoxyethylene, optimize the reaction device, and improve the quality of the product ; At the same time, solving the technical problem of catalyst reaction and polymerization reaction in the same reaction device can reduce reaction cost and improve production efficiency

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