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System and method for synthesizing polyoxymethylene dimethyl ether from methylal

A technology of polyoxymethylene dimethyl ether and methylal, applied in chemical instruments and methods, preparation of organic compounds, sustainable manufacturing/processing, etc., to achieve accurate oxygen concentration, increase product yield, and shorten the process

Active Publication Date: 2020-08-11
陈华
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the present invention provides a system and method for synthesizing polyoxymethylene dimethyl ether from methylal, which can effectively solve the problems in the industrial synthesis process of polyoxymethylene dimethyl ether, and the prepared polyoxymethylene dimethyl ether Methyl ether can be used as a new type of environmentally friendly diesel oxygen-containing component, which can increase the oxygen content of diesel, improve the combustion performance of diesel, accelerate the transformation of the sluggish coal chemical industry, and promote the development of coal chemical and petrochemical to high-efficiency, energy-saving and green chemistry

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  • System and method for synthesizing polyoxymethylene dimethyl ether from methylal
  • System and method for synthesizing polyoxymethylene dimethyl ether from methylal
  • System and method for synthesizing polyoxymethylene dimethyl ether from methylal

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Embodiment 1

[0061] Embodiment 1 of the present invention discloses a system for synthesizing polyoxymethylene dimethyl ether from methylal, including a formaldehyde synthesis unit, a formaldehyde absorption unit, an etherification reaction unit and a refining separation unit connected in sequence;

[0062] The formaldehyde synthesis unit includes a tubular fixed-bed reactor, a heat transfer oil circulation unit connected to the tubular fixed-bed reactor, a methylal pretreatment unit and a product cooling unit, and the methylal pretreatment unit and the product cooling unit perform heat exchange .

[0063] In order to further optimize the technical solution, the heat transfer oil circulation unit includes a heat transfer oil storage tank, a heat transfer oil circulation pump, a heat transfer oil heater, a reactor heat transfer oil storage tank, a heat transfer oil condenser and a first steam generator;

[0064] The heat transfer oil storage tank is connected with the heat transfer oil heat...

Embodiment 2～6

[0095] Embodiments 2 to 6 of the present invention also provide a method for synthesizing polyoxymethylene dimethyl ether from methylal. The system for synthesizing polyoxymethylene dimethyl ether from methylal disclosed in Example 1 specifically includes the following steps , where the specific technical parameters are shown in Table 1 below:

[0096] (1) Introduce nitrogen into the formaldehyde synthesis unit to make the oxygen concentration 3 Multi-component powder compound in the shape of a cylinder.

[0097] (2) Control the reaction of formaldehyde and methylal in the cluster reactor, and the products are refined and separated through the first refining tower, the second refining tower and the third refining tower in turn, and PODE2, PODE3, PODE4, PODE5, PODE6, PODE7~ 8; Among them, the molar ratio of formaldehyde and methylal is 1.3:1~1.1:1, the reaction temperature is 50℃~110℃, and the reaction pressure is 0.5MPa~3MPa; the neutralizing dehydrating agent is input into th...

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Abstract

The invention discloses a system for synthesizing polyoxymethylene dimethyl ether from methylal. The system comprises a formaldehyde synthesis unit, a formaldehyde absorption unit, an etherification reaction unit and a refining separation unit which are connected in sequence. The formaldehyde synthesis unit comprises a dehydrogenation reactor, and a molten salt circulation unit, a methylal pretreatment unit and a product cooling unit which are connected with the dehydrogenation reactor. According to the system and a method for synthesizing polyoxymethylene dimethyl ether from methylal providedby the invention, the problem in the industrial synthesis process of polyoxymethylene dimethyl ether can be effectively solved, and as a novel environment-friendly diesel oil oxygen-containing component, the polyoxymethylene dimethyl ether can quickly transform the inadvertent coal chemical industry to relieve surplus productivity, make up for the technical blank of the new energy industry for replacing diesel oil and promote the development of coal chemical industry and petrochemical industry to efficient energy-saving green chemistry.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis of new energy, and more specifically relates to a system and method for synthesizing polyoxymethylene dimethyl ether from methylal. Background technique [0002] With the development of the economy, the consumption of non-renewable resources is increasing, and the problem of resource depletion is about to be faced. Gasoline and diesel oil are non-renewable resources, which are derived from petroleum, and are the key to the above-mentioned resource depletion problem; Pollution of the environment has become the main source of urban air pollution, which is not conducive to the development of the earth's ecological environment. In order to solve the current situation, researchers are currently looking for new energy sources that can replace non-renewable resources such as diesel. However, emerging nuclear energy, solar energy, wind energy, and water energy can only be used as supplementary ...

Claims

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Application Information

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IPC IPC(8): C07C41/56C07C43/30C07C41/58
CPCC07C41/56C07C41/58C07C43/30Y02P20/10
Inventor 陈华刘红喜郁刘军卢建华李桂成董云海
Owner 陈华
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