Separation and purification apparatus for processing 4-hydroxybiphenyl

Abstract

The invention discloses a separation and purification apparatus for processing 4-hydroxybiphenyl. The apparatus comprises a reaction device and a crystallization device, the reaction device comprisesan upper reaction chamber and a lower layering chamber, horizontal stirring shafts and vertical stirring shafts are mounted in the upper reaction chamber, vibrating rods are mounted in the lower layering chamber, a floater is arranged in lower layering chamber, the lower end of the reaction device is communicated with a purifying tank, a water pump is mounted on the upper surface of one end of thepurifying tank, the crystallization device is fixedly connected to the right side of the reaction device, the crystallization device includes a cooling chamber and a cooling drum, the lower end of the right side of the crystallization device is communicated with a discharging pipeline, and the surface of one side of the discharging pipeline is provided with a PLC. The separation and purificationapparatus for processing 4-hydroxybiphenyl realizes separation and purification of 4-hydroxybiphenyl through the reaction device and the crystallization device, and has high use values.

Description

technical field [0001] The invention belongs to the technical field of separation and purification devices, in particular to a separation and purification device for processing 4-hydroxybiphenyl. Background technique [0002] 4-Hydroxybiphenyl, also known as p-hydroxybiphenyl, is a white needle-like or flaky crystal with a melting point of 164-165°C, a boiling point of 305-308°C, and a flash point of 165°C. It is easily soluble in alcohol and ether. At the same time, it is also soluble in alkali solution and can sublimate. At present, most of the preparation methods are recovered from the distillation residue of phenol produced by sulfonation. Its main purpose is to be used as an intermediate for dyes, resins and rubber. Light-sensitizing and green light-sensitizing dyes are one of the main raw materials for color films and are also used as analytical reagents. [0003] However, there are still many problems in the separation and purification of 4-hydroxybiphenyl. For examp...

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Problems solved by technology

[0003] However, there are still many problems in the separation and purification of 4-hydroxybiphenyl. For example, the efficiency of most separation and purification devices is not high, thereby reducing production efficiency, and most separation and purification devices are not easy to operate and control. At the same time, the steps are complicated, resulting in high cost, and most of the separation and purification devices are not environmentally friendly, causing certain damage to nature

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