Device and method for synthesizing polymethoxy dimethyl ether with medium concentration formaldehyde and methylal

A polymethoxydimethyl ether and methylal technology, which is applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of unfavorable industrialized continuous production, high operation and maintenance cost, complex structure and the like, Achieve the effect of reducing high production cost problems, solving high energy consumption problems, and large heat transfer area

Inactive Publication Date: 2017-01-04
鄂尔多斯市易臻石化科技有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0008] The invention solves the problems of complex structure, high operation and maintenance cost, high energy consumption, low yield and unfavorable industrial continuous production of the existing equipment for producing polyoxymethylene dimethyl ether, and provides a medium-concentration formaldehyde and methylal Device and method for synthesizing polyoxymethylene dimethyl ether

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  • Device and method for synthesizing polymethoxy dimethyl ether with medium concentration formaldehyde and methylal

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Embodiment 1

[0016] Embodiment one: the method for synthesizing polyoxymethylene dimethyl ether with medium concentration formaldehyde and methylal, comprises the following operation steps: a, in the straight pipe section of pipeline reactor, fill super strong solid acid catalyst; b, mass fraction is 55 % formaldehyde aqueous solution and methylal are added to the static mixer through two raw material input pipes according to the molar ratio of 1:1 and mixed evenly; c, the uniformly mixed reaction raw materials are transported into the pipeline reactor through pipelines, and the pipeline reaction is controlled The temperature throughout the reactor is constant at 100°C, the reaction pressure is 1.0MPa, and the feed flow rate is adjusted so that the liquid volume space velocity in the pipe reactor is 0.3h -1 ; d, after the material is reacted in the pipeline reactor, it is transported from the upper mouth of the pipeline reactor to the refining separation equipment for separation and refinin...

Embodiment 2

[0017] Embodiment two: the method for synthesizing polyoxymethylene dimethyl ether with medium-concentration formaldehyde and methylal, comprises the following operation steps: a, in the straight pipe section of pipeline reactor, fill super strong solid acid catalyst; b, mass fraction is 55 % formaldehyde aqueous solution and methylal are added to the static mixer through two raw material input pipes according to the molar ratio of 1:2 and mixed evenly; c, the uniformly mixed reaction raw materials are transported into the pipeline reactor through pipelines, and the pipeline reaction is controlled The temperature throughout the reactor is constant at 150°C, the reaction pressure is 0.4MPa, and the feed flow rate is adjusted so that the liquid volume space velocity in the pipeline reactor is 0.4h -1 ; d, after the material is reacted in the pipeline reactor, it is transported from the upper mouth of the pipeline reactor to the refining separation equipment for separation and ref...

Embodiment 3

[0018] Embodiment three: the method for synthesizing polyoxymethylene dimethyl ether with moderate concentration formaldehyde and methylal, comprises the following operation steps: a, in the straight pipe section of pipeline reactor, fill super strong solid acid catalyst; b, mass fraction is 55 % formaldehyde aqueous solution and methylal are added to the static mixer through two raw material input pipes according to the molar ratio of 1:4 and mixed evenly; c, the uniformly mixed reaction raw materials are transported into the pipeline reactor through pipelines, and the pipeline reaction is controlled The temperature throughout the reactor is constant at 70°C, the reaction pressure is 0.7MPa, and the feed flow rate is adjusted so that the liquid volume space velocity in the pipe reactor is 0.2h -1 ; d, after the material is reacted in the pipeline reactor, it is transported from the upper mouth of the pipeline reactor to the refining separation equipment for separation and refi...

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Abstract

The invention relates to a device and a method for preparing polymethoxy dimethyl ether, particularly relates to a device and a method for synthesizing polymethoxy dimethyl ether with medium concentration formaldehyde and methylal, solves the problems of complicated structure, high operation and maintenance costs, high energy consumption, low yield and not conducive to industrialized continuous production in the prior device, the technical scheme is that the device comprises a static mixer, one end is connected with the input tube, the other end is connected with the pipeline reactor, the other end of the pipeline reactor is connected with a refining separation device. The method comprises the steps of a, filling the reactor with catalyst; b, feeding raw materials into the mixer and mixing well; c, feeding raw materials into the reactor, controlling the temperature, pressure, liquid volume space velocity; d, separation and purification. The device and the method have the advantages of lower energy consumption, high production capacity, suitable for large-scale and continuous production, small back-mixing, sectional temperature control, low wear rate of catalyst, easy separation, no corrosion to device and simple subsequent processing, less pollution, high selectivity, low cost, few high polymer in the product and low separation and purification energy consumption.

Description

technical field [0001] The invention relates to the application field of coal chemical industry, in particular to a preparation method and a device for producing polyoxymethylene dimethyl ether, in particular to a device and a method for synthesizing polyoxymethylene dimethyl ether with medium-concentration formaldehyde and methylal. Background technique [0002] As an important part of my country's energy structure, coal energy plays a vital role in ensuring the security of my country's energy supply, and the coal chemical industry is an effective means to realize the efficient use of coal energy. The development of new coal chemical industry can partially replace petrochemical products, which is of great strategic significance for ensuring national energy security. Polyoxymethylene dimethyl ether (its general formula is CH 3 O(CH 2 O) n CH3, where n≥1 is an integer, the value is generally less than 8, and DMM is used below n Indicated) is a clean diesel component that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/56C07C41/58C07C43/30
CPCC07C41/56C07C41/58C07C43/30
Inventor 张培杰唐清松刘利明龙庆友闫建栋罗立文徐永强姜翠玉皎向阳
Owner 鄂尔多斯市易臻石化科技有限公司
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