Process method and system for producing dimethoxymethane by utilizing coupling reaction and application thereof

A technology of dimethanol formal and coupling reaction, which is applied in the production of bulk chemicals, chemical instruments and methods, and the preparation of organic compounds. It can solve the problems of rising raw material costs and inconvenient industrial continuous production, and reduce equipment corrosion Improve energy utilization and improve air quality

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A technology of dimethanol formal and coupling reaction, which is applied in the production of bulk chemicals, chemical instruments and methods, and the preparation of organic compounds. It can solve the problems of rising raw material costs and inconvenient industrial continuous production, and reduce equipment corrosion Improve energy utilization and improve air quality

CN111138251APending Publication Date: 2020-05-12SOUTHWEST RES & DESIGN INST OF CHEM IND

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Embodiment 1

[0057] Using the aforementioned system and process method, this embodiment provides a method for producing DMM by coupling reaction. The specific method is: control the feed rate of raw material methanol to 150mL / h, and the feed rate of air to 136NL / h. After the heat exchange tower and the first heat exchange tower enter the superheating tower, the methanol-air mixture superheated to 70°C enters the reformer filled with 50mL of vanadium-based catalyst to undergo oxidation-condensation coupling reaction, the reaction temperature is controlled at 99°C, and the system pressure is 0.2 MPa, the reaction tail gas is cooled step by step and gas-liquid separation, the main component of the gas phase is N 2 , O 2 , containing a small amount of CO, CO 2 and trace H 2 etc., the main components of the liquid phase are methanol, water, DMM, methyl formate, etc., and the gas and liquid phases are respectively sent to the Agilent 6820 gas chromatograph for off-line sampling and detection, ...

Embodiment 2

[0064] Using the aforementioned system and process method, this embodiment provides a method for producing DMM by coupling reaction, the specific method is: control the feed rate of raw material methanol to 50L / h, and the feed rate of air to 29Nm 3 / h, the two respectively pass through the second heat exchange tower and the first heat exchange tower and then enter the superheating tower, and the methanol-air mixture superheated to 270 °C enters the reformer filled with 100L heteropolyacid catalyst for oxidation-condensation coupling reaction , the reaction temperature is controlled at 270°C, the system pressure is 2.6MPa, the reaction tail gas is cooled step by step and gas-liquid separation, the main component of the gas phase is N 2 , O 2 , containing a small amount of CO, CO 2 and trace H 2 etc., the main components of the liquid phase are methanol, water, DMM, methyl formate, formic acid, etc., and the gas and liquid phases are separately sampled and detected by the Agil...

Embodiment 3

[0066] Using the aforementioned system and process method, this embodiment provides a method for producing DMM by coupling reaction, the specific method is: control the raw material methanol feed rate 60m 3 / h, air feed rate 4392Nm 3 / h, the two pass through the second heat exchange tower and the first heat exchange tower respectively, and then enter the superheating tower, and the methanol-air mixture superheated to 140°C enters the 20m 3 Oxidation-condensation coupling reaction occurs in the reformer of heteropolyacid catalyst, the reaction temperature is controlled at 160°C, the system pressure is 1.0MPa, the reaction tail gas is cooled step by step and gas-liquid separation, the main component of the gas phase is N 2 , O 2 , containing a small amount of CO, CO 2 and trace H 2 etc., the main components of the liquid phase are methanol, water, DMM, methyl formate, hemiacetal, etc., and the gas and liquid phases are separately sampled and detected by the Agilent 6820 gas c...

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Abstract

The invention discloses a process method and a system for producing dimethoxymethane through a coupling reaction and application thereof. According to the method, after raw materials are heated by utilizing the heat of the converted gas, methanol is efficiently converted into dimethoxymethane in one step under the action of a double-effect catalyst. The whole technological process is short, and device investment and operation cost are low. By providing technologies such as air generation and purification, raw material methanol recycling, safety production control, catalytic reaction system andenergy supply, three-waste discharge control, heat and kinetic energy recovery and the like, the whole production process has the advantages of high production energy efficiency, low safety risk, wastewater reduction, up-to-standard emission of waste gas, reduced equipment corrosion, product pollution and the like, and is particularly suitable for industrial implementation and industrial continuous production.

Description

technical field [0001] The invention belongs to the field of chemical engineering and technology, and specifically relates to a process method, system and application for producing dimethyl formal by coupling reaction. Background technique [0002] Dimethanol formal, also known as methylal, has a chemical formula of CH 3 OCH 2 OCH 3 , English abbreviation DMM, its unique oxygen bridge connection structure determines its special physical and chemical properties, and is widely used as raw materials, intermediates or products of chemical / pharmaceutical / pesticide. [0003] The traditional process of producing DMM is that methanol is first oxidized by silver method or iron molybdenum method to produce formaldehyde, and then formaldehyde and methanol are condensed under the action of acid catalyst to form DMM. Although the process technology is mature and efficient, there are problems such as long process, high raw material consumption and energy consumption, a lot of aldehyde / ...

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Application Information

Patent Timeline

12 May 2020

Publication

CN111138251A

IPC: C07C41/56; C07C43/30; C07C67/00; C07C69/708; C07C29/149; C07C31/20; C07C69/653; C08G16/02

CPC: C07C41/56; C07C67/00; C07C29/149; C08G16/0225; C07C43/30; C07C69/708; C07C31/202; C07C69/653

Inventors: 程金燮; 陈鹏