Continuous production process of sodium salicylate solution

Abstract

The invention discloses a continuous production process of a sodium salicylate solution. The continuous production process comprises a sodium phenate solution storage tank, a sodium hydroxide solution storage tank, a centrifugal pump, a static mixer, a falling film evaporator, a horizontal film evaporator, a spiral feeder, a reaction kettle, a pressure gauge, a thermometer, a sodium salicylate powder storage tank, a sodium salicylate solution storage tank, a valve and the like. Outlets of the phenol solution storage tank and the sodium hydroxide solution storage tank are respectively connected to a static mixer through a pipeline, a manual ball valve and a centrifugal pump, the static mixer is connected to a reaction kettle through a falling film evaporator, a horizontal film evaporator and a spiral feeder, and the reaction kettle comprises a gas distribution pipe, a jacket, a motor, a thermometer and a pressure gauge. And the reaction kettle is connected to a sodium salicylate solution storage tank through a sodium salicylate powder storage tank. According to the invention, the continuous preparation of the sodium salicylate solution can be realized, and the problems of long production period, incapability of continuous feeding and discharging, high energy consumption and insufficient productivity in the existing intermittent production are solved.

Description

technical field [0001] The invention relates to the field of chemical equipment, in particular to a continuous production process of sodium salicylate solution. Background technique [0002] Sodium salicylate is a synthetic raw material or intermediate of various antipyretic and analgesic drugs. The existing process is intermittent production, which has problems such as long production cycle, low energy utilization rate and low effective conversion rate, while continuous production can effectively Simplify production process steps and reduce energy consumption. [0003] At present, the main method of industrial production of sodium salicylate is to add sodium phenate solution in a stirred tank, vacuum dry to solid particles, feed carbon dioxide gas, and carry out carboxylation reaction preparation under certain temperature and pressure conditions. However, at present, this production method is only applied to intermittent production processes, including drying, carboxylatio...

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Problems solved by technology

[0005] In order to solve the problems of long production cycle, inability to continuously feed and discharge materials, high energy consumption and insufficient production capacity of the existing intermittent production process, the invention provides a continuous production process of sodium salicylate solution

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