A device and method for continuous production of polyoxydimethyl ether

A polyoxydimethyl ether and paraformaldehyde technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as failure to achieve substantial breakthroughs, and achieve wide adaptability and shortened reactions. effect of time

Inactive Publication Date: 2017-05-10
李敬珍
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Problems solved by technology

Including liquid ion technology, also failed to achieve a substantial breakthrough

Method used

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  • A device and method for continuous production of polyoxydimethyl ether

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Embodiment 1

[0047] According to this technology, methanol and paraformaldehyde are fed at a ratio of 1:1, respectively 2.5 tons, and CH 3 (CH 2 O) 3-5 OCH 3 Mixed products. A 0.5-ton interlayer reactor is used, the heating method is electric heating rod heat-conducting oil, the operating temperature is 120°C, and the pressure is 0.15Mpa; the later refining adopts double towers and normal pressure. Catalyst preparation: 355kg of 98% sulfuric acid, 295kg of 85% phosphoric acid.

[0048] Specific steps:

[0049] 1. After the final inspection of equipment function, performance and safety status is completed, the prepared multifunctional catalyst is added to the reactor at one time, and the pressure stabilization, pressure maintenance and pressure relief valves of the reactor are adjusted to 0.15Mpa, and nitrogen is sealed.

[0050] 2. Send electricity to heat up to the set temperature and keep it relatively stable.

[0051] 3. According to the set flow rate, start to evenly feed materia...

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Abstract

The invention relates to the technical field of clean coal utilization, petroleum refining and oil additives and particularly relates to a method for continuously producing polyoxy dimethyl ether. According to the method, methanol and paraformaldehyde are used as raw materials, a compound multifunctional catalyst is adopted at a catalyst, and polyoxy dimethyl ether is produced continuously on a liquid fixed bed. The method comprises the step that methanol, methylal or a methanol-methylal mixture catalytically reacts with formaldehyde, metaformaldehyde, dimethyl ether or a formaldehyde-metaformaldehyde-dimethyl ether mixture in an acidic liquid fixed bed reactor at 100-150DEG C under 0.01-0.15MPa under the action of the compound multifunctional catalyst. The invention invents and prepares the multifunctional catalyst, invents and creates the high-efficiency liquid fixed bed reactor which is simple in structure, easy to control and high in through-put capacity, innovates an extreme synthesis way of using the catalyst excessively, and adopts ultrasonic and membrane technologies in final refining so as to explore a new way to remove residual waste acid from liquid material except by hydrogenization and an anion-cation bed, thus forming a complete set of technology for continuously and efficiently preparing polyoxy dimethyl ether from methanol or methylal and formaldehyde, trioxymethylene or paraformaldehyde.

Description

technical field [0001] The present invention relates to the technical fields of coal clean utilization, petroleum refining and oil product additives, and specifically relates to a method for continuous production of polyoxydimethyl ether, which utilizes methanol and paraformaldehyde as raw materials, and uses a composite multifunctional catalyst as the raw material. The catalyst is a method for continuously producing polyoxydimethyl ether through a liquid fixed bed. Background technique [0002] Polyoxydimethyl ether (Dmmn), molecular formula: CH3 (CH3 (CH20)n OCH3, where n≥2. This product contains oxygen: 42.5%-49.5% (take Dmm3-6 as an example), cetane number : 78-104, boiling point: 156-280 degrees, density about 1.1, viscosity 1.05-2.75, flash point higher than 60 degrees, index performance is very similar to standard diesel oil, and obviously better than ordinary diesel oil, it is a very ideal diesel oil additive And the deployment of component oils, scientific addition...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C43/30C07C41/56C07C41/50
CPCC07C41/50C07C41/56C07C43/30
Inventor 李敬珍梁福强李旭光
Owner 李敬珍
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