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A device for extracting high-purity methyl formate from the by-product of dimethyl oxalate hydrogenation to ethylene glycol

A technology of dimethyl oxalate and methyl formate, applied in the field of chemical production, can solve the problems of methyl formate not being recycled, waste of resources and the like, and achieve the effects of ensuring recycling rate, saving costs and increasing economic benefits

Active Publication Date: 2020-09-25
GNSG ANHUI HONG SIFANG
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a device for extracting high-purity methyl formate from the by-products of the hydrogenation of dimethyl oxalate to prepare ethylene glycol, which solves the problems in the process of hydrogenation of dimethyl oxalate to prepare ethylene glycol. The by-product methyl formate cannot be effectively recycled, leading to the problem of waste of resources

Method used

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  • A device for extracting high-purity methyl formate from the by-product of dimethyl oxalate hydrogenation to ethylene glycol
  • A device for extracting high-purity methyl formate from the by-product of dimethyl oxalate hydrogenation to ethylene glycol
  • A device for extracting high-purity methyl formate from the by-product of dimethyl oxalate hydrogenation to ethylene glycol

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Embodiment Construction

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0034] Since methyl formate is a light component and is easily volatile, there are very high requirements for the collection and storage of raw materials, as well as rectification and separation. A device for extracting high-purity methyl formate from diol by-products,

[0035] Such as Figure 1-8 As shown, a device for extracting high-purity methyl formate from the by-product of the hydrogenation of dimethyl oxalate to ethylene ...

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Abstract

The invention provides a device for extracting high-purity methyl formate from a by-product of dimethyl oxalate hydrogenation for ethylene glycol preparation and relates to the technical field of chemical production. The device comprises a rectifying tower and a product tower, wherein slot liquid distributors in the rectifying tower and the product tower include primary slots and secondary slots,buffer cells are arranged in the primary slots, the secondary slots consist of multiple parallelly distributed slots, and the primary slots and the secondary slots of vertical structures; T-shaped baffles are alternatively arranged on two side walls of the inside of each distributed slot, transverse baffles of the T-shaped baffles are connected with the inner side walls of the distributed slots. The slot liquid distributors are provided with the T-shaped baffles alternatively distributed on the two side walls of the inside of the distributed slots, the gas and liquid contact time is prolongedthrough the T-shaped baffles, and it is ensured that the reaction time reaches an expected separation effect.

Description

technical field [0001] The invention relates to the technical field of chemical production, in particular to a device for extracting high-purity methyl formate from by-products produced by hydrogenation of dimethyl oxalate to prepare ethylene glycol. Background technique [0002] Ethylene glycol, commonly known as glycol, has a wide range of uses. It can be used to synthesize polymer compounds such as "polyester" (dacron), and can also be used as raw materials for films, rubber, plasticizers, desiccants, and brake fluids. It is also commonly used High boiling point solvent, the freezing point of its 60% aqueous solution is -40°C, so it can be used as antifreeze for car radiators in winter and refrigerant for aircraft engines. Ethylene glycol can also be used as a wetting agent for cellophane, fibers, leather, and adhesives. The vapor produced by heating ethylene glycol can be used as a stage smoke screen, and the nitrate ester of ethylene glycol is an explosive. [0003] E...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/14B01D3/32C07C69/06C07C67/54
CPCB01D3/146B01D3/322C07C67/54C07C69/06
Inventor 汤德昌王晓华谢中平曹宗元宫勋郑国柱王吉锁吴孜菘沈光海朱仁锁陈正渠
Owner GNSG ANHUI HONG SIFANG
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