Grease epoxidation continuous production method

Abstract

The invention discloses a grease epoxidation continuous production method. The grease epoxidation continuous production method comprises the following steps of using unsaturated grease and hydrogen peroxide as the raw materials, using formic acid as a catalyst, using PEG-30 as an oil and water dispersant, and using a hydraulic cavitation element as a mixer; mixing the oil phase and water phase ofa reaction solution by the hydraulic cavitation element; performing the continuous epoxidation reaction on the mixed reaction solution in a heat exchange type reactor, so as to obtain the epoxy grease. The grease epoxidation continuous production method has the advantages that only a small amount of PEG-30 is added in the reaction process, the initial mixing of the water phase and the oil phase isenhanced by the PEG-30 and the hydraulic cavitation technique, and the good mixing state is maintained in the subsequent reaction process, so that the continuous production type is realized, and theproduction efficiency is high; after the PEG-30 is added, the quality of the final epoxy grease product is not influenced; by adopting the technology, the large-scale industrialized production effectis realized, and the production cost is low.

Description

technical field [0001] The invention relates to a continuous production method of oil epoxidation. 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. The realization of continuous production can greatly reduce the cost of production and improve the safety of production. [0003] At present, industrial grease epoxidation mostly uses mechanical stirring reactors (Chinese patents CN 201482479U, CN101914219B, CN102391210A, CN 101139328B, CN 101284821A, CN 100580025C, CN100590188C, CN 101928267B, CN 10467525). (1) This type of reactor relies on stirring paddles to achieve the mixing of materials, and the liquid is prone to form a small circulation during the stirring process, resulting in insufficient contact between the oil and water phases, resulting in low reaction efficiency. ...

AI Technical Summary

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.

The industry usually avoids excessive temperature rise by adding hydrogen peroxide slowly (addition time of 2-4 hours). However, the temperature fluctuation will still exceed 10 ℃, 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 economy of the stirred reactor

However, this multi-pot series mode has complex equipment and a large amount of equipment, which requires a large investment and a large area. A large number of equipment also puts forward higher requirements for control and safety.

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