Method and device for separating dimethyl carbonate in coal-made ethylene glycol residual liquor
A technology of dimethyl carbonate and coal-to-ethylene glycol, which is applied in the purification/separation of carbonate/haloformate, can solve problems such as resource waste and environmental pollution, achieve high recovery rate, simple process, Content stable effect
Pending Publication Date: 2018-07-20
安阳永金化工有限公司
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[0004] The object of the present invention is to provide an energy-saving and high-efficiency coal-to-ethylene glycol by overcoming the disadvantages of environmental pollution and resource waste caused by the unreasonable recovery and treatment of raw coal-to-ethylene glycol co-production raffinate existing in the above-mentioned prior art. Separation method and device for dimethyl carbonate in raffinate
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[0028] The method and device for separating dimethyl carbonate in the coal-to-ethylene glycol raffinate of the present invention will be further elaborated and illustrated below in conjunction with specific embodiments and accompanying drawings.
[0029] A kind of separation device of dimethyl carbonate in coal-based ethylene glycol raffinate, such as figure 1 Shown, a kind of separation device of dimethyl carbonate in coal-based ethylene glycol raffinate, this separation device comprises light removal tower 1, crude DMC rectification tower 2 and fine DMC rectification tower 3, the middle entrance of light removal tower is connected with the first pipeline 101 for feeding raw materials, the tower top outlet of the light removal tower is connected with the seventh pipeline 107, and the seventh pipeline is connected with the fusel alcohol storage tank 6; the tower still outlet of the light removal tower is connected with the eighth pipeline 108 , the eighth pipeline is connected...
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The invention relates to the field of chemical engineering, in particular to the field of coal-made ethylene glycol and a method and device for separating dimethyl carbonate in coal-made ethylene glycol residual liquor. The separating device comprises a dehydrogenation tower, a rough DMC rectifying tower and a refined DMC rectifying tower, a first pipeline for feeding raw materials is connected toan inlet of the middle of the dehydrogenation tower, the dehydrogenation tower is connected to an inlet of a side-draw tank through a second pipeline, the side-draw tank is connected to the rough DMCrectifying tower through a third pipeline, the rough DMC rectifying tower is connected to the refined DMC rectifying tower through a fourth pipeline, the refined DMC rectifying tower is connected toa dimethyl carbonate storage tank through a fifth pipeline, and the refined DMC rectifying tower is connected to an inlet of the tower top of the side-draw tank through a sixth pipeline. By means of the method and device for separating dimethyl carbonate in the coal-made ethylene glycol residual liquor, dimethyl carbonate in the ethylene glycol residual liquor is mainly recycled and separated through the dehydrogenation tower, the rough DMC rectifying tower and the refined DMC rectifying tower, the equipment in use is simple, low in energy consumption and low in investment, separated dimethylcarbonate is high in purity, the production cost is greatly lowered, and the enterprise benefit is increased.
Description
technical field [0001] The invention relates to the field of chemical industry, in particular to the field of coal-to-ethylene glycol, in particular to a separation method and device for dimethyl carbonate in coal-to-ethylene glycol raffinate. Background technique [0002] Dimethyl carbonate, also known as DMC, methyl carbonate, ethane carbonate Dimethyl carbonate (DMC) is an important organic chemical intermediate, because its molecular structure contains carbonyl, methyl, methoxy and carbonyl methyl Oxygen, so it can be widely used in organic synthesis reactions such as carbonylation, methylation, methoxylation and carbonylmethylation, for the production of polycarbonate, isocyanate, polyurethane, polycarbonate diol, Allyl Diethylene Glycol Carbonate, Naphthyl Carbamate (Carbaryl), Anisole, Tetramethylalkolammonium, Long Chain Alkyl Carbonate, Carbohydrazide, Malonate, Propylenediurea Alkane, diethyl carbonate, triphosgene, furazolidone, methyl carbazate, methyl anilate a...
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Login to View More IPC IPC(8): C07C69/96C07C68/08
CPCC07C68/08C07C69/96
Inventor 韩联国张超奇邢艳红郑卫李祥燕胡贇桑良玉
Owner 安阳永金化工有限公司