Ethylene glycol rectification device system and rectification technique in industry of producing ethylene glycol by synthesis gas
A technology of ethylene glycol and synthesis gas, which is applied in the preparation of hydroxyl compounds, organic compounds, chemical instruments and methods, etc., can solve the problems of high energy consumption and low output of high-grade products, and achieve improved purity and high-quality products The effect of product output and cost reduction
Active Publication Date: 2013-07-10
PUJING CHEM IND SHA
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Since rectification is carried out under high-pressure 25kg steam and the ethylene glycol after three-tower rectification still contains more impurities such as ethanol and butanediol, the rectification work number in the industrialization process of syngas to ethylene glycol is currently used The rectification process has problems such as high energy consumption and low output of superior products
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Embodiment 1
[0030] The ethylene glycol rectification process in the synthesis gas system ethylene glycol industry of the present invention is:
[0031] (1) Ethylene glycol mixture (49.2% methanol, 0.14% ethanol, 45.2% ethylene glycol, 1.0% butanediol, 2.0% water, 2.46% methyl glycolate) produced by hydrogenation reactor , enter the rectification work number, first enter the primary dealcoholization tower 1, open 3kg of steam, atmospheric rectification extracts light component methanol at 72°C from the top of the tower, enters the methanol tank 7, and contains ethylene glycol at the bottom of the tower The alcohol mixture (methanol 16.24%, ethanol 2.9%, ethylene glycol 75.71%, butanediol 1.7%, water 3.45%) enters the secondary dealcoholization tower 2;
[0032] (2) Open 3kg of steam to extract methanol at 45°C from the top of the secondary dealcoholization tower 2 at a vacuum degree of -0.045MPa, and also enter the methanol tank 7, and the ethylene glycol mixture (methanol 0.3%, ethanol 3...
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The invention discloses an ethylene glycol rectification device system in industry of producing ethylene glycol by synthesis gas. The ethylene glycol rectification device system comprises a primary dealcoholization tower, a secondary dealcoholization tower, an ethylene glycol refining tower, wherein the primary dealcoholization tower is connected with a hydrogenation reaction product tank by a pipeline, the secondary dealcoholization tower is connected with the primary dealcoholization tower by a pipeline, the ethylene glycol refining tower is connected with the secondary dealcoholization tower, an ethanol removal tower and a butylenes glycol removal tower which are connected by a pipeline are arranged on the pipeline between the secondary dealcoholization tower and the ethylene glycol refining tower, the top of the ethanol removal tower is connected with an ethanol tank, and the top of the butylenes glycol removal tower is connected with the butylenes glycol tank. The invention further discloses a rectification technique in industry of producing ethylene glycol by synthesis gas. According to the ethylene glycol rectification device system in industry of producing ethylene glycol by synthesis gas, the steam consumption can be reduced, the energy consumption can be saved, the purity of the methanol can be improved, the output of premium grade products can be increased, the production cost can be greatly lowered, and the enterprise benefits can be increased.
Description
technical field [0001] The invention relates to an ethylene glycol rectification device system and a rectification process in the synthesis gas to ethylene glycol industry. Background technique [0002] Ethylene glycol (EG), also known as glycol and ethylene glycol, is an important petrochemical basic organic raw material, mainly used in the production of polyester fiber, antifreeze, unsaturated polyester resin, lubricant, plasticizer Non-ionic surfactants and explosives, etc. At present, the methods of synthesizing ethylene glycol at home and abroad can be divided into petroleum production process and non-petroleum production process. [0003] The process of producing ethylene glycol by petroleum method uses ethylene and oxygen as raw materials, and ethylene glycol is finally obtained through ethylene oxide. At present, this method is used in large-scale ethylene glycol production both at home and abroad. This method is relatively mature and widely used. However, this m...
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IPC IPC(8): C07C31/20C07C29/80
Inventor 李久玉陈林任启云葛良赋王珊陈明功
Owner PUJING CHEM IND SHA
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