A kind of energy-saving method of butene oxidative dehydrogenation to butadiene plant

A technology for oxidative dehydrogenation and butadiene, which can be used in chemical instruments and methods, chemical industry, organic chemistry, etc., and can solve problems such as large energy consumption of devices

Active Publication Date: 2016-06-15
SINOPEC ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of excessive energy consumption of butene oxidative dehydrogenation to butadiene plant in the prior art, the present invention provides an energy-saving method for butene oxidative dehydrogenation to butadiene plant

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  • A kind of energy-saving method of butene oxidative dehydrogenation to butadiene plant
  • A kind of energy-saving method of butene oxidative dehydrogenation to butadiene plant

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Embodiment

[0027] Such as figure 2 As shown, an aftercondenser is installed after the desorption tower; the reflux tank of the desorption tower is connected to the aftercondenser, the liquid outlet of the aftercondenser is connected to the reflux tank of the desorption tower, and the gas outlet of the postcondenser is connected to the inlet separation tank of the generated gas compressor.

[0028] The design load of a 100,000 tons / year butene oxidative dehydrogenation to butadiene plant is 100%. Under normal load conditions, the flow rate of the generated gas after water cooling in the water cooling tower is 50151kg / h. Part of the process of aldehyde washing and primary oil absorption The process is:

[0029] A. Compression and aldehyde washing: The generated gas from the top of the water cooling tower enters the aldehyde washing tower after being pressurized by the compressor, and countercurrently contacts with the fresh desalted water from the top of the tower and the wastewater enter...

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Abstract

The invention discloses an energy-saving method of device for preparing butadiene by oxidative dehydrogenation of butane. The method comprises the following steps: after exchanging heat of rich absorbent oil containing C4 from a column bottom of an absorption tower by virtue of rich oil of the column bottom of a desorption column to 95-120 DEG C, sending to the desorption column; and arranging a post-condenser behind the desorption column, wherein a return tank of the desorption column is connected with the post-condenser, a liquid outlet of the post-condenser is connected with the return tank of the desorption column, and a gas outlet of the post-condenser is connected with a separation tank of a produced gas compressor inlet. The energy-saving method disclosed by the invention can be used for saving energy and improving the device efficiency.

Description

technical field [0001] The invention relates to the field of butadiene production, and more particularly relates to an energy-saving method for a butadiene oxidative dehydrogenation device. Background technique [0002] Butadiene is an important petrochemical basic organic raw material and synthetic rubber monomer. Its position in the petrochemical olefin raw material is second only to ethylene and propylene. At present, the industry mainly uses three methods of solvent extraction and distillation, from Mixed C by-product of steam cracking to ethylene 4 The butadiene products are extracted from the distillate, which are the acetonitrile method, the DMF method and the NMP method. These three methods have the economic advantages of low cost, low energy consumption and little pollution. However, with the cracking of light hydrocarbons and the removal of ethane Hydrogen, C 1 The research and development, popularization and application of new ethylene production processes such ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C07C11/167C07C7/11C07C7/00
CPCY02P20/10
Inventor丁文有阮细强陈茂春陈钢王春慧彭勃侯霞晖贾崑
OwnerSINOPEC ENG