Phenol production technology

A production process and an aromatic sulfonate technology, applied in the field of phenol production technology, can solve problems such as low production efficiency and long reaction time, and achieve the effects of reducing environmental protection pressure, shortening reaction time, and improving reaction yield

Inactive Publication Date: 2016-01-06
严兴扬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcoming that the technology reaction time of current production phenol is long, and production efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment l

[0018] The 100kg sodium p-toluenesulfonate solid and the 50kg sodium hydroxide solid are mixed homogeneously in a mixer. Turn on the electric heating to control the temperature of the twin-screw extrusion reactor to 350° C., and then feed the mixed material into the twin-screw extrusion reactor at a uniform speed at a rate of 15 kg / h through the feeder. Driven by the extrusion of the screw, it moves to the other end of the pipeline and undergoes an alkali fusion reaction at the same time. The rotation speed of the twin-screw extrusion reactor is 85 rpm, and the residence time of the material in it is 16 minutes. The material from the outlet of the twin-screw extrusion reactor enters the aging kettle for aging for 40 minutes, the aging temperature is controlled at 360°C, and the aged material overflows through the outlet at the upper end of the aging kettle. The obtained material was subjected to acid treatment according to a conventional method, and purified to obtain 43.5 kg ...

Embodiment 2

[0020] The 100kg sodium p-toluenesulfonate solid and the 46kg sodium hydroxide solid are mixed homogeneously in a mixer. Turn on the electric heating to control the temperature of the twin-screw extrusion reactor to 350° C., and then feed the mixed material into the twin-screw extrusion reactor at a uniform speed at a rate of 15 kg / h through the feeder. Under the extrusion of the screw, it moves to the other end of the pipeline and undergoes an alkali fusion reaction at the same time. The rotation speed of the twin-screw extrusion reactor is 280 rpm, and the residence time of the material in it is 5 minutes. The material from the outlet of the twin-screw extrusion reactor enters the aging kettle for aging for 40 minutes, the aging temperature is controlled at 360°C, and the aged material overflows through the outlet at the upper end of the aging kettle. The obtained material was subjected to acid treatment according to a conventional method, and then purified to obtain 41.2 kg...

Embodiment 3

[0022] The 100kg sodium p-toluenesulfonate solid and the 50kg sodium hydroxide solid are mixed homogeneously in a mixer. Turn on the electric heating to control the temperature of the twin-screw extrusion reactor to 340°C, and then feed the mixed materials into the twin-screw extrusion reactor at a uniform speed through the feeder at a rate of 15kg, / h. Under the extrusion of the screw, it moves to the other end of the pipeline and simultaneously undergoes an alkali fusion reaction. The speed of the twin-screw extrusion reactor is 280 rpm, and the residence time of the material in it is omln. The material from the outlet of the twin-screw extrusion reactor enters the aging kettle for aging for 40 minutes, the aging temperature is controlled at 360°C, and the aged material overflows through the outlet at the upper end of the aging kettle. The obtained material was subjected to acid treatment according to a conventional method, and purified to obtain 42.7 kg of p-cresol crude pro...

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PUM

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Abstract

The invention relates to a phenol production technology. The technology realizes continuous production, and improves the production efficiency and the reaction yield. The phenol production technology is characterized in that aryl sulfonate and an alkali undergo an alkali fusion reaction, the alkali fusion reaction is carried out in a screw reactor, and the screw reactor is a twin-screw extrusion reactor. The aryl sulfonate and the alkali are solids. Compared with traditional intermittent kettle type alkali fusion technologies, the technology shortens the reaction time by 2 / 3, obviously reduces material coking and decomposition phenomena, improves the reaction yield by 10% or above and improves the content of crude phenols to 90% or above. The aryl sulfonate solid is used in the reaction, so the content of phenol-containing water steam generated in the alkali fusion process is greatly reduced, treatment is simple, the environmental protection pressure is obviously reduced, and the national present energy saving and emission reduction industry policy is met.

Description

technical field [0001] The invention relates to a production process of phenol. Background technique [0002] Phenols are an important class of chemical substances whose chemical structure is characterized by substituted hydroxyl groups on the aromatic rings. The preparation of phenol usually adopts the alkali fusion method of aryl sulfonate, that is, the alkali fusion reaction of aryl sulfonate and alkali produces phenoxide, which is acidified and purified to obtain phenol. [0003] Among phenolic substances, p-cresol is an important organic chemical intermediate, which is widely used in medicine, spices and plastics industries. At present, p-cresol is produced by sulfonation and alkali fusion process routes. That is, toluene sulfonation produces p-toluenesulfonic acid, and p-toluenesulfonic acid is neutralized to obtain a saturated aqueous solution of sodium p-toluenesulfonate, which is de-alkali-fused to produce p-cresol. Among them, alkali fusion is currently the batc...

Claims

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Application Information

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IPC IPC(8): C07C37/04C07C39/07C07C39/06
Inventor 严兴扬
Owner 严兴扬
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