Grease epoxidation reactor

Abstract

The invention discloses a grease epoxidation reactor. The grease epoxidation reactor mainly comprises a reaction kettle, a circulating pump, a cavitator and a static mixing type heat exchanger. The grease epoxidation reactor is characterized in that initial microscopic mixing of an oil phase and a water phase is realized by the cavitator; the reaction kettle adopts an upper-lower overflowing structure, liquid passing through the static mixing type heat exchanger enters the reaction kettle by a liquid distributor, and liquid flowing out of the liquid distributor can maintain a mixed state stillin the middle area of the reaction kettle; after the auxiliary-reaction part, the oil phase and the water phase are gathered and layered into an upper part and a lower part, and the water phase can enrich peroxyformic acid; the water phase with the lower part enriching the peroxyformic acid and the upper-part oil phase enter next reaction cycle again by the cavitator. The grease epoxidation reactor disclosed by the invention has the beneficial effects that the microscopic mixing of the oil phase and the water phase is realized by the cavitator, a good mixing state of the oil and the water ismaintained by the static mixing type heat exchanger and the reaction kettle with the upper-lower overflowing structure, the heat generated in reaction can be removed in time, simultaneously, good masstransfer and good heat transfer are realized simultaneously and the requirement of industrial capacity is met.

Description

technical field [0001] The invention relates to the field of liquid-liquid heterogeneous strong exothermic reaction, in particular to a grease epoxidation reactor. Background technique [0002] The oil epoxidation reaction system is a liquid-liquid heterogeneous strong exothermic reaction system, and good mass transfer and heat transfer are the prerequisites to ensure the smooth progress of this type of reaction. In addition, consideration must also be given to the suitability of the reactor for industrial applications, ie sufficient capacity. The design of the present invention is proposed on the premise of the above three basic requirements (good mass transfer, good heat transfer and meeting industrial production capacity). [0003] At present, industrial grease epoxidation mostly adopts mechanical stirring reactor (Chinese patent CN 201482479U, CN101914219BCN102391210A, CN 101139328B, CN 101284821A, CN 100580025C, CN100590188C, CN 101928267B, CN 102675254A). (1) This ty...

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Problems solved by technology

However, the heat release of grease epoxidation is as high as 60kcal / mol, and the heat transfer coefficient of immersion heat transfer is low, which is far from meeting the needs of the reactor for heat transfer.

In the industry, the method of slowly adding hydrogen peroxide (adding time of 2-4h) is usually used to avoid excessive temperature rise. However, the temperature fluctuation will still exceed 10°C, which will affect product quality and bring greater safety hazards.

(3) In addition, with the stirring structure, the larger the reaction tank, the greater the stirring power, which is not conducive to industrial scale-up, which reflects the poor economical efficiency of the stirred reactor

Obviously, it still has not solved the two problems of how to maintain the oil-water dispersion state and good heat exchange

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