Device for producing methyl formate by gas phase methanol carbonylation, process and catalyst on-line evaluation method

Abstract

The invention discloses a device for producing methyl formate by gas phase methanol carbonylation, which is characterized in that the device comprises a nitrogen gas pipeline, a carbon monoxide gas pipeline, a hydrogen gas pipeline, a nitric oxide gas pipeline, an oxygen gas pipeline, a methanol storage tank (1), a fluid pump (2), an esterification column (3), a first rectifying column (4), a waste water storage tank (5), a first condenser (6), a gas mixing box (7), a reactor (8), a heating furnace (9), a catalyst (10), a needle valve (11), an on-line gas chromatography system (12), a gas-liquid separator (13), a second rectifying column (14), a second condenser (15), a methyl formate storage tank (16), an air release valve (17), and a circulating pump (18). The device adopts a fixed bed reactor, is easy to separate the catalyst from the product, and is simple in operation; the reactor is a normal pressure reactor; and the money investment is less.

Description

technical field [0001] The invention belongs to the technical field of methyl formate production, and in particular relates to a device, process and catalyst online evaluation method for producing methyl formate by gas-phase methanol carbonylation. Background technique [0002] Methyl formate is an extremely important intermediate in C1 chemistry and has a wide range of uses. Starting from methyl formate, formic acid, formamide, N,N-dimethylformamide, dimethyl carbonate, ethylene glycol, acetic acid, methyl acetate, acetic anhydride, methyl methacrylate, high-purity CO can be produced It can also be used as insecticide, fungicide, fumigant and tobacco treatment agent. At present, my country's annual demand for methyl formate is about 1.36 million tons, but the production capacity is about 50,000 tons, with a gap of 1.3 million tons. The consumption composition of methyl formate is as follows: 30% for synthetic leather, 26% for pesticide, 25% for medicine, 10% for acrylonit...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problems existing in the existing liquid-phase process reaction device, the present invention provides a device, process and catalyst online evaluation method for gas-phase methanol carbonylation to produce methyl formate, using a fixed-bed reactor, and the reactor is an atmospheric pressure reactor , the catalyst does not require high purity of the raw material gas, which solves the technical problems existing in the existing liquid phase process reaction device: 1. Difficulty in separating the catalyst from the product; 2. The investment in equipment is very high; 3. The operation of the device is difficult

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