A kind of dimethyl sulfate esterification reaction tower

Abstract

The invention relates to the field of chemical industry and particularly discloses a dimethyl sulfate esterification reaction tower. The dimethyl sulfate esterification reaction tower comprises a tower body, wherein a top feed opening and a material outlet are respectively formed in the top and the bottom of the tower body, the interior of the tower body is sequentially divided by an upper tower plate and a lower tower plate arranged up and down into an upper layer of tower cavity, a middle layer of tower cavity and a lower layer of tower cavity from top to bottom, the three layers of tower cavities are respectively connected with a cooling device, a flow guide cylinder with an open top end is arranged at the middle position of the bottom of each layer of tower cavity, a gas distributor is arranged at the bottom of each flow guide cylinder, and each gas distributor is communicated with a gas inlet formed in the side wall of the layer of tower cavity through a pipeline. The dimethyl sulfate esterification reaction tower disclosed by the invention has the beneficial effects that the long-time contact between dimethyl ether and sulfur trioxide in a dimethyl sulfate esterification process can be effectively increased, the excessive reaction of the dimethyl ether is ensured, so that the sulfur trioxide can be completely reacted, the acidity of the product is reduced and the esterification process is converted from discontinuous production to continuous production.

Description

(1) Technical field [0001] The invention relates to the field of chemical industry, in particular to a dimethyl sulfate esterification reaction tower. (2) Background technology [0002] The reaction tower is a device commonly used in chemical production to react two or more materials at a certain pressure and temperature. It is often used in the countercurrent contact reaction of gas and liquid. In general, after the materials enter the tower, under the condition of steam or other external heating (or cooling), the materials will undergo chemical reactions due to the characteristics of the materials. Most of the common reaction towers in chemical production use liquid materials to enter from the top of the tower (tower side), gas materials to enter from the side of the bottom of the tower, and the final product is extracted from the bottom of the tower, and the heat exchanger installed inside the tower is used The heat required for the reaction is forced to circulate by the...

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Problems solved by technology

The existing reaction tower can only meet the simple gas-liquid contact reaction of general materials, but for the esterification process of dimethyl sulfate, the general simple reaction tower cannot be used, because dimethyl ether is a liquefied gas, its volatile If there is not enough space and travel, it will not be able to make enough contact with the sulfur trioxide in the liquid phase to achieve complete reaction

[0003] The existing esterification process of dimethyl sulfate is generally carried out by using an esterification tank. In order to ensure that dimethyl ether can fully react with sulfur trioxide, it takes a long time to allow it to fully react, which makes the production process difficult. Intermittent, and the reaction will still be incomplete and uneven, the reaction speed is slow, and the reaction efficiency is low. In addition, the esterification process of dimethyl sulfate will generate a lot of heat, and the characteristics of the esterification tank itself require that the temperature in the tank should not be too high , so continuous external cooling is required to ensure the temperature in the esterification tank, which consumes a lot of energy and brings inconvenience to the production work

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