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Single step synthesis gas-to-dimethyl ether process with methanol introduction

机译:引入甲醇的一步法合成气制二甲醚工艺

摘要

A process is set forth for converting synthesis gas into dimethyl ether (DME) in a single step comprising contacting the synthesis gas with a bifunctional catalyst system having a methanol synthesis functionality and a methanol dehydration functionality. In particular, the present invention is an improvement to said process for increasing the stability of the bifunctional catalyst system, particularly when the process is conducted in the liquid phase. The improvement comprises introducing a methanol containing stream into the DME reactor such that the methanol concentration throughout the DME reactor is maintained at a concentration greater than 1.0%, generally between 4.0% and 8.0%. In one embodiment of the present invention, the methanol containing stream comprises at least a portion of the byproduct methanol from the DME reactor such that said portion of byproduct methanol is introduced into the DME reactor as a recycle stream.
机译:提出了一种在单个步骤中将合成气转化为二甲醚(DME)的方法,该方法包括使合成气与具有甲醇合成官能度和甲醇脱水官能度的双官能催化剂体系接触。特别地,本发明是对用于增加双官能催化剂体系的稳定性的所述方法的改进,特别是当该方法在液相中进行时。所述改进包括将含甲醇的物流引入DME反应器中,使得整个DME反应器中的甲醇浓度保持在大于1.0%的浓度,通常在4.0%至8.0%之间。在本发明的一个实施方案中,含甲醇的料流包含至少一部分来自DME反应器的副产物甲醇,使得所述一部分副产物甲醇作为再循环料流引入DME反应器中。

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