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Apparatus for extracting coarse 1,3-butadiene by double baffle plated tower and method thereof

A technology of butadiene and partition tower, which is applied in the field of crude oil extraction, and can solve the problems of numerous equipment, complicated operation, and high production cost

Active Publication Date: 2006-06-21
QINGDAO ECSS SOFT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing method has the outstanding shortcomings of requiring a large number of equipment, complicated operation, large energy consumption and high production cost.

Method used

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  • Apparatus for extracting coarse 1,3-butadiene by double baffle plated tower and method thereof
  • Apparatus for extracting coarse 1,3-butadiene by double baffle plated tower and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The internal structure of the partition tower 1 of the device of the present invention is divided into a butadiene extraction and rectification section 5, a weight removal subsection 32, an alkyne extraction and rectification section 6, a common middle tower area 7, a solvent analysis section 8, and an alkyne distillation section 9 and share the lower tower area 10; the butadiene extractive rectification section 5 and the weight-removing fractional section 32, and the alkyne extractive rectification section 6 are separated by the vertical partition plate 2 of the upper section; the solvent analysis section 8 and the alkyne distillation section 9 are used The longitudinal partitions 3 of the lower section are spaced apart, and the alkyne distillation section 9 is separated from the upper common middle tower area 7 by the upper end cover plate 4; a raffinate condenser 11 is provided at the top of the butadiene extraction and rectification section 5; A crude butadiene conde...

Embodiment 2

[0040] The product does not consider the weight-removal component, and the side line tower 33 and related accessories are removed from the partition tower structure. figure 2 Flow process, all the other are identical with embodiment 1.

[0041] Add the 13498.4kg / h C4 mixture stream 17 with a temperature of 54.0°C in gaseous form to the 36th theoretical plate of the butadiene extractive rectification section 5 of the partition column with 100 theoretical plates in total, the aqueous acetonitrile solvent Stream 16 is added to the 4th theoretical plate, and water-containing acetonitrile solvent and carbon four mixture weight ratio are 5.4: 1.0, and carbon four mixture has the weight percent of following composition:

[0042] Propane 0.5047

[0043] Propylene 0.1019

[0044] n-Butane 1.3094

[0045] Isobutane 0.3802

[0046] Isobutylene 23.3535

[0047] 1-butene 16.6869

[0048] trans-2-butene 5.1783

[0049] Cis-2-butene 3.8939

[0050] 1,3-Butadiene 47.5445

[0051] 1,...

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Abstract

The invention relates to a device and method for separating butylenes and removing butynol and heavy component to get coarse 1,3-butynol from carbon four mixture through extractive distillation by using water-bearing acetonitrile as dissolvent in double baffle tower. The extractive distillation operation is carried out in the baffle tower with up and low two section longitudinal baffle, the inner structure of the baffle tower comprises butadiene extraction and distillation section, heavy component stripping section, alkyne extraction and distillation section, shared middle tower zone, dissolvent analysizing section, alkyne steaming section and shared lower tower zone. Introducing the liquid in the middle of heavy component stripping section and alkyne extraction and distillation section to side tower to strip the heavy component, dislodging the side tower and relative equipment if the heavy component is not needed stripping. The inventive device and method complish the traditional two-time extraction and distillation and part of heavy component stripping in one tower, and is characterized by small investment, simple operation, low energy consumption and reduced product cost.

Description

Technical field: [0001] The present invention relates to a kind of device and method for extracting crude 1,3-butadiene, in particular is to separate butene from C4 mixture by extraction and rectification with double-baffle tower integrated process and water-containing acetonitrile as solvent A device and method for obtaining crude 1,3-butadiene by removing butyne and heavy components. technical background: [0002] Industrially crude 1,3-butadiene is usually obtained from the carbon four mixture fraction. The main components of the mixture are 1-butene, isobutene, cis-2-butene, trans-2-butene, 1,3-butadiene and a small amount of 1-butyne and vinyl acetylene. Aqueous acetonitrile can be used as a solvent to obtain crude 1,3-butadiene after two extractive distillations (comprising extractive distillation and solvent analysis): the first extractive distillation separates butene from butadiene, and the second The secondary extractive distillation removes butyne and vinyl acet...

Claims

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Application Information

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IPC IPC(8): C07C11/167C07C7/08
Inventor 韩方煜方自真王浩薛振祥项曙光
Owner QINGDAO ECSS SOFT TECH
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