Adjustable Lower Spray Membrane Sulfonation Reactor and Its Application

Abstract

The invention relates to an adjustable downward-spray film sulfonation reactor. The body of the reactor is in the shape of a cylinder, the bottom of the reactor is in the shape of a cone, the inner wall of the reactor is smooth, and the body of the reactor and the bottom of the reactor are connected through a flange and are detachable; the top of the reactor is provided with a sulfur trioxide gas inlet, a compressed air inlet, a sulfonation raw material inlet, a thermometer opening and a pressure gage opening, wherein insulation jackets are arranged out of the body of the reactor, a circulating water inlet and a circulating water outlet are arranged out of the insulation jackets, the bottom side of the body of the reactor is provided with a reaction product outlet and a tail gas outlet pipeline, a slag removal opening is arranged at the bottom of the body of the reactor, three pipelines of the sulfur trioxide gas inlet, the compressed air inlet, the sulfonation raw material inlet and an inner sleeve head are welded together, are capable of moving up and down and are fixed by a cutting sleeve when moved to a specific position, and a ratio of move stroke to the height of the body of the reactor is 1: 2 to 1: 5. After sulfonation by the reactor, the acid value of acid oil is 7 to 250 mgKOH / g, and the content of sulfur trioxide in tail gas is less than 500 mu g / L.

Description

technical field [0001] The invention relates to a sulfonation reaction device for producing petroleum sulfonate, which is an adjustable lower spray membrane sulfonation reactor. Background technique [0002] At present, sulfur trioxide sulfonation methods can be divided into three types: injection type, membrane type and kettle type. Most of the raw materials used in the membrane method are heavy alkylbenzenes, heavy alkylbenzene fractions or corresponding refined distillate oils; if the petroleum fractions are not refined, the acid residue generated during the sulfonation process will block the sulfonator , affecting the smooth progress of sulfonation. The kettle method is used to produce more petroleum sulfonates, but the disadvantage is that the reaction time is longer and there are more by-products; There are many acid slags in the plant, which can easily block the injection pipe or other pipelines of the device, affecting production. At the same time, when the device ...

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Problems solved by technology

Most of the raw materials used in the membrane method are heavy alkylbenzenes, heavy alkylbenzene fractions or corresponding refined distillate oils; if the petroleum fractions are not refined, the acid residue generated during the sulfonation process will block the sulfonator , affecting the smooth progress of sulfonation

The kettle method is used to produce more petroleum sulfonates, but the disadvantage is that the reaction time is longer and there are more by-products; There are many acid slags, which are easy to block the injection pipe or other pipelines of the device, affecting production. At the same time, when the device is shut down, sulfur trioxide waste gas, waste water or waste acid slag may leak, polluting the environment

[0003] CN1472199A adopts the continuous tank type sulfonation method. Since the organic solvent is used as the diluent, a solvent recovery system needs to be added. At the same time, during the sulfonation reaction process, the reaction temperature needs to be controlled within the range of -30 to 30°C, and a refrigeration system needs to be equipped to increase production cost of sulfonate

In addition, in the production process, due to the use of a large amount of toxic and harmful solvents, it will cause harm to safe production, operators and the environment.

[0004] The sulfur trioxide membrane-type sulfonation disclosed in CN1275431A and CN1203935A adopts the same sulfonation reactor for different feed oils to react, which will cause some raw materials to undergo sulfonation reaction, which is manifested in the formation of too much acid slag. If the slag adheres to the pipe wall and runs for a long time, it will inevitably block the pipe, thus affecting the sulfonation effect and resulting in unstable quality of the produced sulfonate

However, if the conversion rate of sulfonated aromatics in the raw oil is greater than 40%, the amount of acid residue will be as high as 4-9%, which makes the post-treatment process of the process more cumbersome

[0006] CN1690025A adopts kettle-type sulfonation technology, and uses a decanter centrifuge connected in series behind the sulfonation reaction kettle to separate a large amount of acid slag generated in the sulfonation process, which solves the problem of reactor and pipeline blocked by acid residue generated in the kettle-type sulfonation reaction, And the reaction is carried out continuously, but the mass transfer efficiency in the tank type sulfonation technology is low, the reaction time is long, and the problems of many by-products still exist

But the disadvantage of this technique is that SO 3 Long contact time with oil mist, raw oil and SO 3 After the gas is contacted, the product will undergo a sulfonation reaction during the falling process, which cannot be adapted to sulfonated raw materials with different properties.

In addition, the acid slag produced in the reaction process sticks and accumulates on the heating coil to form large pieces of acid slag, which affects the reaction quality and easily blocks the air passage.

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