A process and device for rapid sulfonation neutralization reaction

Abstract

The invention relates to a technology for quick sulfonation and neutralizing reaction. The technology comprises the following steps of adding organic matters into a super-gravity sulfonation reactor; mixing SO3 gas and dry air with dew point lower than -50 DEG C, and cooling to 40 to 50 DEG C, so as to form mixed gas; mixing SO3 and organic raw material according to a gas and liquid ratio of (1 to 1.5) to 1, introducing the mixed gas into the super-gravity sulfonation reactor, and performing sulfonation reaction at the temperature of 5 to 130 DEG C, so as to obtain a sulfonation product; directly sending the sulfonation product into a turbulence neutralizer, sending process water and alkaline water into the turbulence neutralizer, and neutralizing until the pH (potential of hydrogen) value of the mixture is 8 to 11 at the pressure of 0.2 to 0.6MPa and temperature of 5 to 80 DEG C; sending the obtained mixture into a gas and liquid separator to separate gas and liquid, exhausting the gas out of a gas air exhaust port at the upper part of the gas and liquid separator, and draining the liquid product out of a drain port at the lower part of the gas and liquid separator. The technology has the advantages that the reaction efficiency is high, the investment is little, the energy consumption is low, the content of effective matter in the product is high, and the luster is good.

Description

technical field [0001] The invention relates to a process and equipment for rapid sulfonation neutralization reaction of high-viscosity compounds or low-vapor-pressure compounds. [0002] technical background [0003] Sulfonation technology plays an important role in the chemical industry and is an important step in the synthesis of various organic products. At present, the relatively mature and industrialized sulfonation reactors are mainly kettle type and membrane type sulfonation reactors. Patent CN 101367751A discloses the process of sulfuric acid sulfonation using a reaction kettle. First, molten refined naphthalene is added into the reaction kettle, and then a certain amount of 105% sulfuric acid is added in proportion, and the sulfonation is carried out at a certain temperature for a certain period of time to obtain an acidity of 24- 27% sulfonate. Although the tank-type sulfonator has many advantages, this type of reactor has low efficiency, serious back-mixing, man...

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Problems solved by technology

However, the cooling capacity of this device is limited, and it is prone to local overheating. When it is applied to the sulfonation of distillate oil with higher viscosity, it is prone to coking. Strong devolatilization phenomenon will appear under these conditions, which will cause a large amount of volatilization of solvents or low vapor pressure raw materials, which will bring new problems such as tail gas treatment and recovery of raw materials and solvents.

At the same time, the traditional process from sulfonation to neutralization needs to go through gas-liquid separator, aging device, intermediate pump and connecting pipelines. For higher viscosity sulfonates, it is easy to block or scale in pipelines and equipment, resulting in production termination. Moreover, the high-viscosity sulfonate is difficult to stir, and the use of traditional neutralization reactors will lead to insufficient neutralization and long neutralization time, which will eventually affect the effective substance content of the product

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