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A kind of method for preparing methyl formate

A technology of methyl formate and methanol, which is applied in the field of preparing methyl formate, can solve the problems of synthetic methyl formate impurity sensitivity, strict requirements on raw material purity, complicated process route, etc., and achieve environment-friendly production process safety, product separation investment and The effect of low energy consumption and high process safety

Active Publication Date: 2018-07-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The current technology for synthesizing methyl formate is sensitive to impurities, has strict requirements on the purity of raw materials, complex process routes, high energy consumption, and high investment
In view of the above reasons, the production scale of a single set is generally within 100,000 tons / year, and it is difficult to form a scale effect

Method used

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  • A kind of method for preparing methyl formate
  • A kind of method for preparing methyl formate
  • A kind of method for preparing methyl formate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Production of methyl formate reaction process:

[0058] As a typical scheme, the reaction process flow of the method for the production of methyl formate of the present application is as follows figure 2 As shown, wherein, the first reaction zone uses a catalytic rectification tower to carry out the process of preparing methylal from the condensation reaction of formaldehyde, methanol, and dimethyl ether; the second reaction zone uses a fixed-bed reactor to carry out the disproportionation reaction of methylal; The first-stage separation device is used for the separation of dimethyl ether in the product of the disproportionation reaction of methylal; the second-stage separation device is used for the separation of methyl formate, the product of the disproportionation reaction of methylal, from unreacted raw materials.

[0059] Specifically, the raw materials include: formaldehyde solution, methanol, and recycled dimethyl ether separated from the product. The above thre...

Embodiment 2～6

[0066] Catalyst A in the first reaction zone, catalyst B in the second reaction zone, feed ratio in the first zone, mass space velocity of formaldehyde in the feed to the first zone, temperature in the second reaction zone, and pressure in the second reaction zone are shown in Table 1. , other operation steps are all identical with embodiment 1, and its reaction result is shown in table 1.

Embodiment 7～8

[0068] Catalyst B in the second reaction zone is shown in Table 1. Weigh 200g of 20-40 mesh catalyst, put it into a stainless steel reaction tube with an inner diameter of 30mm, activate it with nitrogen at normal pressure and 100°C for 1 hour, and then carry out the reaction. Catalyst A in the first reaction zone, the ratio of feed to the first zone, the mass space velocity of formaldehyde in the feed to the first zone, the temperature in the second reaction zone, and the pressure in the second reaction zone are respectively shown in Table 1, and other operating steps are all in accordance with the implementation Example 1 is the same, and its reaction result is shown in Table 1.

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Abstract

The application relates to a method for the preparation of methyl formate. The raw material containing formaldehyde, methanol and / or dimethyl ether enters the first reaction zone and contacts with catalyst A and separates to obtain component I. After entering the second reaction zone and contacting catalyst B, methyl formate is obtained as product, dimethyl formate through separation. Ether returns to the first reaction zone, and component II returns to the second reaction zone; the ratio of formaldehyde, methanol and / or dimethyl ether in the raw material is based on the molar number of carbon atoms contained in each component, which is formaldehyde:methanol and / or dimethyl ether Methyl ether = 1:2~4; the mass space velocity of formaldehyde in the raw material is 0.01~15.0h-1; the temperature in the first reaction zone is 50~100°C; the temperature in the second reaction zone is 50~200°C; the pressure 0.1-10Mpa; each component is independently gas phase and / or liquid phase. The catalyst in the present application has long service life, mild reaction conditions, high raw material utilization rate, continuous production, and large-scale industrial application potential.

Description

technical field [0001] The invention relates to the field of chemical engineering, in particular to a method for preparing methyl formate. Background technique [0002] in C 1 In chemistry, after methane chemistry, synthesis gas chemistry and methanol chemistry, methyl formate has gradually developed into a new C 1 Starting materials and building blocks of chemicals. Starting from methyl formate, formic acid, acetic acid, ethylene glycol, methyl propionate, methyl acrylate, methyl glycolate, N-formylmorpholine, N-methylformamide, N,N-dimethyl Formamide and many other C 1 Chemical chemical products. [0003] The current technology for synthesizing methyl formate is sensitive to impurities, has strict requirements on the purity of raw materials, complex process routes, high energy consumption and high investment. In view of the above reasons, the production scale of a single set is generally within 100,000 tons per year, and it is difficult to form a scale effect. The ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/06C07C67/00
Inventor 倪友明朱文良刘勇刘红超刘中民李利娜刘世平周慧
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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