A dimethyl ether synthetic catalyst as well as its preparing method

Abstract

The invention relates to dimethyl ether synthetic catalyst and the preparation method thereof, and belongs to the catalyst preparation technical field. The invention has the purpose to provide the catalyst suitable for the use of a slurry bed and the preparation method thereof. The invention is characterized in that inert reaction medium is taken as the oil phase, catalyst raw materials are respectively prepared into sol and solution as the water phase, and catalyst precursor milk gel is obtained through the process of sol-emulsion-gel. The milk gel performs the heating treatment under the ambience of N2 and the strong stirring after being aged, and thus the slurried catalyst is obtained to be directly used for the dimethyl ether synthetic reaction of the slurry bed. The invention takes water phase liquid beads in the emulsion as the micro-reaction environment to prepare a catalyst precursor, and has the predominant advantage that the granularity and the appearance can be controlled, the preparation environment and the operation environment of the catalyst are the very same, and the problem of the easy inactivation of the catalyst and the abrasion of the catalyst in the dimethyl ether synthesis of the slurry bed can be solved.

Description

1. Technical field [0001] The invention relates to a catalyst for synthesizing dimethyl ether and a preparation method thereof, and relates to a catalyst for preparing dimethyl ether by a one-step method of slurry bed synthesis gas and a preparation method thereof, belonging to the technical field of catalyst preparation. 2. Background technology [0002] As an important chemical raw material and environmental protection product, dimethyl ether (DME) is widely used as aerosol, refrigerant and various organic synthesis raw materials in the chemical and pharmaceutical industries. In recent years, with the increasingly prominent problems of global energy shortage and ecological environment pollution, DME, as a new type of clean liquid fuel, especially as a substitute for vehicle fuel and liquefied petroleum gas, has attracted widespread attention and has become a new research hotspots. [0003] Slurry bed reactor is considered to be the most promising technology suitable for o...

AI Technical Summary

Problems solved by technology

The preparation environment of the catalyst is exactly the same as the use environment, and has the outstanding advantages of controllable particle size and shape. The catalyst prepared by this method has dual functions of methanol synthesis and methanol dehydration, and has good stability at the same time, successfully solving the problem of slurry state Catalyst deactivation and catalyst wear problems in the synthesis of bed dimethyl ether