A separation device for synthesizing aromatic products from toluene and methanol

Abstract

The invention relates to a separation device for synthesizing aromatic products from toluene and methanol, comprising: an isolation tower, a separation tower, a gas-liquid separation device, a booster device and a pressure swing adsorption device; The material inlet is connected; the top outlet of the separation tower is connected with the feed port of the booster device; the top outlet of the separation tower is connected with the feed port of the gas-liquid separation device; the outlet of the booster device They are respectively connected with the feed port of the separation tower, the feed port of the gas-liquid separation device and the feed port of the pressure swing adsorption device; the discharge port of the gas-liquid separation device is respectively connected with the feed port and variable The feed port of the pressure adsorption device is connected. By redesigning the existing separation system for the synthesis of aromatic products from toluene and methanol, the number of equipment has been reduced, and the energy saving can reach more than 55% under the same separation index as the existing technology, which can be reduced to that of the existing technology 75% of the investment.

Description

technical field [0001] The invention relates to the technical field of chemical product production devices, in particular to a separation device for synthesizing aromatic hydrocarbon products from toluene and methanol. Background technique [0002] Alkylation of toluene and methanol as a new technology for the production of xylene, its main advantage is that it can convert toluene raw materials into xylene products to the greatest extent. It is also a technology for high-value utilization of methanol. [0003] In order to maximize the economic benefits of this production route, the toluene methanol fixed bed catalyst is mainly used in the shape-selective methylation technology. Through this process technology, the selectivity of p-xylene in mixed xylene is greatly improved, and the xylene produced by the catalyst is greatly improved. The mass fraction of p-xylene in toluene is as high as more than 90%, which greatly reduces the cost of subsequent p-xylene separation. There...

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Problems solved by technology

[0009] That is, although toluene and methanol can achieve high-efficiency output of xylene products, the current separation process of xylene products still has problems such as high energy consumption, high investment, and a large number of equipment.

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