Apparatus for reducing arene extraction solvent sulfolane, and application thereof

Abstract

The invention relates to an apparatus used for reducing an arene extraction solvent sulfolane, and an application thereof. The apparatus has a structure that: an arene extraction apparatus lean solvent outlet port is connected to a flow meter (1); the flow meter (1) is connected to a solvent heat exchanger (2); the solvent heat exchanger (2) is connected to a solvent cooling device (3); the solvent cooling device (3) is connected to a filter (4); the filter (4) is connected to a resin exchange tower (5); the resin exchange tower (5) is connected to another channel of the solvent heat exchanger (2); the other channel of the solvent heat exchanger (2) is connected to the other port of the arene extraction apparatus; and alkalescence anion-exchange resin is installed in the resin exchange tower. Under the conditions that the space velocity is 1.5-9.0h<->, and the temperature is 40-60 DEG C, after the processing of the apparatus, the pH value of a sulfolane solvent is increased to above 6.0, the chromaticity is reduced to 0-0.5, a chlorine ion content is reduced to below 1mg/kg, an equipment corrosion inhibition efficiency is 81.5%, and a maintenance period of the arene extraction apparatus reaches 3 years.

Description

technical field [0001] The invention relates to an industrial device and an application method for reducing the corrosion of sulfolane, an aromatic hydrocarbon extraction solvent, and more specifically relates to an industrial device and an application method that uses an anion exchange resin to remove chloride ions in sulfolane, and reduces the corrosion of sulfolane to extraction device equipment. application method. Background technique [0002] In order to ensure the chlorine balance of the reforming reaction water in the aromatics complex, it is necessary to continuously supplement tetrachlorethylene at the regenerator, and a part of the supplemented tetrachlorethylene enters the downstream unit in the form of chloride ions along with the reformed product during the reaction process. One of the deheptanizer tops is produced C 6 、C 7 The components enter the sulfolane extraction unit for processing. During the process of processing materials, the Cl brought in by the ...

AI Technical Summary

Problems solved by technology

This method has high energy consumption and power consumption for deteriorating sulfolane, and does not involve the removal method of chloride ions

CN1861594A discloses the regeneration method of inferior sulfolane. On the basis of CN1230545A, an online pH meter is set in the sulfolane passage, which realizes real-time monitoring of the quality of sulfolane after regeneration, but does not solve the defects of the original patent

[0007] In view of the current purification methods for inferior sulfolane, they are all aimed at the H produced by the deterioration of sulfolane 2 SO 3 The purification method adopted for organic acidic substances such as sulfonic acids and sulfonic acids does not involve 6 、C 7 Component enters Cl in sulfolane - The removal of strong base resin, and the existence of poor organic pollution resistance of strong base resin, or difficulty in regeneration of molecular sieve adsorbent, or difficulty in post-treatment of white clay, and the deterioration of sulfolane, or the first distillation and then through the anion exchange resin layer, high energy consumption, Or use solid alkali adsorbent to produce defects such as industrial waste slag. This patent provides a sulfolane dechlorination method and industrial application device with low operating cost, relatively simple operation process, and no or little solid residue generation. 6 、C 7 Cl accumulated by components entering sulfolane - , to solve the Cl of sulfolane plant equipment - Corrosion problems, the corrosion inhibition rate of the equipment reached 81.5%, and the high-temperature heat exchanger of the sulfolane unit was repaired every 2 to 3 years, eliminating potential safety hazards, reducing operating costs, realizing long-term operation of the unit, and ensuring the safe operation of the aromatics complex at full load, improving Economic Benefits of Aromatics Complex

Images