Method for preparing aromatic hydrocarbons from methanol with low carbon olefin as byproduct, and apparatus thereof

Abstract

The invention discloses a method for preparing aromatic hydrocarbons from methanol with low carbon olefin as a byproduct, and an apparatus thereof. The problems of low yield of the aromatic hydrocarbons, large output of dry gas and liquefied gas, and the like in the prior art are solved in the invention. The method comprises the following steps: preheating the raw material methanol to 350-500DEG C, adding the preheated methanol to a riser reactor, carrying out a contact reaction on the preheated methanol and a catalyst in the riser reactor for 0.8-4.0s, allowing the reaction product of the riser reactor to enter a deep catalysis reactor (such as a fluidized bed, moving bed or fixed bed reactor) to carry out a reaction, returning C2-C5 alkanes in the reaction products of the deep catalysis reactor to the deep catalysis reactor in order to re-process the C2-C5 alkanes, and discharging other products from the apparatus, wherein the catalyst is a ZSM-5 / SAPO-34 catalyst modified by Ga, Zn, P and Ag.

Description

technical field [0001] The invention belongs to the field of preparing aromatics from methanol, and relates to a method for preparing aromatics from methanol and by-producting low-carbon olefins and a device used in the method. Background technique [0002] Low-carbon aromatics mainly include benzene, toluene and xylene, generally referred to as BTX, which are important basic chemical raw materials, of which p-xylene (PX) accounts for about 45% of the total consumption of BTX, and about 95% of aromatics production in industry comes from Petrochemical, a small amount comes from coal tar processing. In 2010, my country's BTX output was about 14.2 million tons, and the apparent consumption reached 19 million tons. The gap between supply and demand was about 4.8 million tons, of which the self-sufficiency rate of PX was only 61.6%, and the net import was 3.32 million tons. In order to fill the gap in the aromatics market and reduce the dependence of aromatics on petroleum resourc...

AI Technical Summary

Problems solved by technology

It has solved the problems of low yield of aromatics and large output of dry gas and liquefied gas in the prior art, and at the same time can make the device operate continuously

Images