Automatic butyl naphthalene sulfonate production device and automatic control method thereof

Abstract

The invention discloses an automatic butyl naphthalene sulfonate production device and an automatic control method thereof. The production device comprises a PLC (programmable logic controller), a fuming sulfuric acid elevated tank and a sulfonation reaction kettle, wherein the fuming sulfuric acid elevated tank is provided with a weight sensor and a feeding control valve and connected with the PLC; the sulfonation reaction kettle is provided with a temperature sensor and connected with the PLC; a heating vapor pipe, a cooling water pipe and a freezing salt water pipe are respectively provided with a control valve and connected with the PLC. The control method comprises the following steps: automatically adjusting and controlling the fuming sulfuric acid control valve, the freezing salt water control valve, the heating vapor control valve and the cooling water control valve by the PLC so as to control the dropwise adding speed of fuming sulfuric acid, controlling the initial temperature of the reaction kettle to be less than or equal to 30 DEG C and the reaction temperature to be 35 to 40 DEG C, heating the reaction kettle to 50 to 55 DEG C, preserving heat for 8h, and then cooling the reaction kettle to 40 DEG C, and standing for 5h. The charging speed of fuming sulfuric acid and the flow rate of freezing salt water, heating vapor and cooling water are adjusted by the PLC according to the variation of the reaction temperature, so that the sulfonation reaction temperature is stable, and the safety production and product quality can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and relates to an automatic production device for sodium butylnaphthalene sulfonate and an automatic control method thereof. Background technique [0002] Sodium butylnaphthalene sulfonate is an anionic surfactant with a wide range of uses. It is an excellent penetrating agent and wetting agent. It is used in various processes of textile printing and dyeing, as an emulsifier, softener in the rubber industry, and wetting in the color lake industry. Agents and fertilizer and pesticide synergists. Sodium butylnaphthalene sulfonate is a sulfonated product obtained by the sulfonation reaction of butylnaphthalene and oleum. Therefore, the key process in production is sulfonation, which is not only related to product quality, but also related to safety. [0003] The production process used in the production of sodium butylnaphthalene sulfonate is: butanol and refined naphthalene are alkylat...

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Problems solved by technology

The sulfonation reaction of butyl naphthalene and fuming sulfuric acid must be carried out at low temperature (≤40°C) due to the requirements of the process. Since the sulfonation reaction is a violent exothermic reaction, if the temperature is high and light It will cause poor product quality, and it will cause side effects until it causes accidents.

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