Tetracene extraction and distillation system and technology

Abstract

The invention discloses a tetracene extraction and distillation system and technology. The system comprises an extraction and distillation tower, a recycling tower, a benzene tower, a toluene tower and a xylene tower, which are connected in sequence, wherein the extraction and distillation tower is used for extracting, distilling and separating through introducing hydrogen oil and a solvent. Afterthe technology is applied, the technology is used for continuously producing for many years, and tetracene distillation extraction is carried out on full components by utilizing hydrogenated oil; under the condition that a solvent regeneration device is not needed, the quality of all products can be ensured; especially, the separation efficiency and stability of the extraction and distillation are improved and the purity of 99.99 percent or above can be produced all year round; the consumption amount of a solvent is nearly zero. Meanwhile, the labor amount of post operation is also greatly reduced after each system is stable.

Description

technical field [0001] The invention belongs to the technical field of benzene processing technology, and in particular relates to a tetrabenzene extraction and distillation system and technology. Background technique [0002] In the 21st century, almost all newly-built crude (light) benzene processing technology adopts hydrogenation extractive distillation benzene processing technology. Crude (light) benzene refining is to use crude (light) benzene in coal chemical industry as raw material, remove impurities such as sulfides, nitrides and hydrocarbons in it by chemical methods, and obtain high-purity benzene, toluene, Xylene and other products. At that time, since there was no hydrogenation extractive distillation benzene processing technology with independent intellectual property rights in China, we had to spend a high amount of technology introduction fees to introduce low-temperature gas-phase hydrogenation technology (K.K method) from German Uhde company or introduce ...

AI Technical Summary

Problems solved by technology

However, during the extraction process of sulfolane, the continuous deterioration of sulfolane is gradually highlighted, which reduces its extraction ability, directly leads to the decline of extraction and distillation ability, and directly leads to the deterioration of product quality.

The main performance is that the color of sulfolane becomes darker, with black polymers, pH value drops, and heavy aromatics and some colloids are mixed in the solvent to form deposits and solvents. In this way, the system increases the amount of solvent regeneration in order to ensure the quality of the final product. , not only consumes a large amount of new sulfolane, but also consumes a large amount of regeneration heat and a series of problems such as residue treatment after regeneration

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