Process for the separation of diethylbenzene in carbon deka-aromatic hydrocarbons
A carbon ten aromatic hydrocarbon and separation method technology, applied in the field of separation of diethylbenzene, can solve the problems of not finding an efficient adsorbent desorbent, large investment, etc., and achieve good separation effect and thermal stability, low energy consumption, and product purity. high effect
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Embodiment 1
[0013] 1.C 10 Preliminary Separation of Mixed Diethylbenzene in Heavy Aromatics
[0014] to C 10 The heavy aromatics reformate feedstock is subjected to initial fractionation to separate the diethylbenzene component. Some main parameters of the rectification experimental device: rectification column type: packed column, with vacuum sleeve for heat insulation; packing material: 2mm θ ring; rectification column size: 30mm×1.5m; kettle capacity: 3000ml; The way of distillation, normal pressure operation. Heating and distilling the raw materials in the tower kettle, a condenser is installed at the top of the tower, and the reflux ratio is controlled by a reflux ratio controller. At the beginning, use full reflux and heat quickly to make the liquid in the tower kettle boil quickly. After the reflux liquid is present at the top of the tower, reduce the heating power of the tower kettle to make the temperature at the top of the tower and reflux stable. The weight ratio of reflux t...
Embodiment 2
[0022] 1.C 10 Preliminary Separation of Mixed Diethylbenzene in Heavy Aromatics
[0023] The rectification experimental apparatus is identical with embodiment 1. The weight ratio of reflux to outflow was 3:1, and the production rate was 30 g / h. The fraction in the range of 178-182° C. was collected, and the mixed diethylbenzene content was 84.2% by weight. 2. Extractive distillation
[0024] The extractive distillation experimental device is the same as in Example 1. The extractant is dibutyl phthalate: the flow rate is 300 g / hour. Feed temperature ~ 180 ° C, feed position is the upper half of the tower; raw material concentration: mixed diethylbenzene content is 84.2% (weight)), flow rate 60 grams / hour, feed temperature 150 ° C, feed position is extraction The lower half of the distillation column.
[0025] A mixture of extractant, p-diethylbenzene and a small amount of m-diethylbenzene flows out from the bottom of the column. Meta-diethylbenzene is condensed by the ...
Embodiment 3
[0029] 1.C 10 Preliminary Separation of Mixed Diethylbenzene in Heavy Aromatics
[0030] The rectification experimental apparatus is identical with embodiment 1. The weight ratio of reflux to outflow was 30:1 and the production rate was 30 g / h. The fractions in the range of 178-182° C. were collected, and the separated mixed diethylbenzene content was 92.5% by weight.
[0031] 2. Extractive distillation
[0032] The extractive distillation experimental device is the same as in Example 1. The extractant is a mixture of dimethyl phthalate and dibutyl phthalate, the weight ratio is 1:1: the flow rate is 800 g / hour. Feed temperature ~ 180°C, feed position is the upper half of the tower; raw material concentration: mixed diethylbenzene 92.5% (weight), flow rate 40 g / h, feed temperature 150°C, feed position is the extractive distillation column lower half.
[0033]A mixture of extractant, p-diethylbenzene and a small amount of m-diethylbenzene flows out from the bottom of the ...
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