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1-butene refining energy-saving process and device with heat pump heat integration

A technology of heat integration and butene, applied in the direction of sustainable manufacturing/processing, organic chemistry, chemical industry, etc., can solve the problems that the process flow needs to be further improved, and achieve the effect of remarkable energy saving effect, obvious energy saving characteristics, and simple operation

Active Publication Date: 2021-02-05
SHANDONG QILU PETROCHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Patent CN2014101190893 discloses an energy-saving process flow for the separation and purification of 1-butene. The etherified C4 mixture from MTBE undergoes selective hydrogenation reaction, and the relatively light isobutane group is removed through a de-isobutanizing rectification tower. points, and at the same time, H 2 、H 2 O and methanol and hydrocarbons form low-boiling azeotropes and remove them from the top of the tower, and then pass through the 1-butene rectification tower to remove the relatively heavy components of n-butane, trans-2-butene and cis-2-butene , high-purity 1-butene can be obtained from the top of the tower, and the whole process uses process integration to realize the heat integration of the deisobutanizer and 1-butene refining tower, thereby obtaining an energy-saving 1-butene precision separation process, but The energy-saving effect of the technological process of this method needs to be further improved

Method used

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  • 1-butene refining energy-saving process and device with heat pump heat integration
  • 1-butene refining energy-saving process and device with heat pump heat integration
  • 1-butene refining energy-saving process and device with heat pump heat integration

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Such as figure 1 As shown, a 1-butene refining energy-saving device with heat pump heat integration includes a feed pipe 1, a de-weight tower 6 and a de-light tower 9; the feed pipe 1 is divided into two paths, respectively connected to the 1# heat exchanger 3, 2# heat exchanger 5, then synthesize one way to connect the 6 feed inlets of the weight-removing tower; the outlet at the bottom of the weight-removing tower 6 is connected to the 2# heat exchanger 5; Connect 3# heat exchanger 7 and compressor 8, be divided into two roads then, one road connects the 3# reboiler 21 at the bottom of the light removal tower 9 towers, the other road connects the 2# reboiler 16 in the middle of the weight removal tower 6, and then Re-synthesize one way, connect 1# reflux tank 19 after air cooler 17 and throttle valve 18; 1# reboiler 15 at the bottom of weight removal tower 6 is connected with 3# heat exchanger 7; 1# reflux tank 19 is connected respectively The reflux port at the top ...

Embodiment 2

[0054] The 1-butene refining energy-saving device with heat pump heat integration in Example 1 is used for 1-butene refining, and the specific process flow is as follows:

[0055] After the selective hydrogenation reaction of the C4 mixture after the ether from MTBE, the main components are hydrogen, water, methanol, C3, 1-butene, isobutane, n-butane, trans-2-butene and cis- 2-butene-containing 1-butene mixture, the temperature of 1-butene-containing mixture is 40°C, the flow rate is 5507.41kg / h, and the composition is shown in Table 1.

[0056] The material composition of the mixture containing 1-butene in table 1

[0057] composition hydrogen water carbon three Isobutane n-butane 1-butene Isobutylene kg / h 0.3333 4.626 18.906 172.044 1138.344 3397.1 2.968 composition cis-2-butene trans-2-butene Butadiene vinyl acetylene Methanol MTBE Dimethyl ether kg / h 443.866 327.587 0.055 0.048 0.249 0.00095 1.283

[0...

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Abstract

The invention relates to the technical field of 1-butene refining, in particular to a 1-butene refining energy-saving process and device with heat pump heat integration. According to the 1-butene refining energy-saving process with heat pump heat integration, after an etherified C4 mixture of MTBE undergoes a selective hydrogenation reaction, a 1-butene-containing mixture with main components of hydrogen, water, methanol, C3, 1-butene, isobutane, n-butane, trans-2-butene and cis-2-butene is obtained, the method comprises the following steps: removing heavy components containing n-butane, trans-2-butene and cis-2-butene by virtue of a heavy component removal tower, and removing light components containing isobutane and C3 by virtue of a light component removal tower, so as to obtain 1-butene from the bottom of the light component removal tower. According to the 1-butene refining energy-saving process and device with the heat pump heat integration function, energy integration of a heat pump rectification system of the heavy component removal tower and the light component removal tower and waste heat recycling is achieved through the technical means with the heat pump heat integrationfunction, the obvious energy-saving characteristic is achieved, and economic benefits are improved.

Description

technical field [0001] The invention relates to the technical field of 1-butene refining, in particular to an energy-saving process and device for 1-butene refining with heat pump heat integration. Background technique [0002] 1-Butene is a carbon tetraolefin, which can be used as a polyethylene comonomer, and can also be used to produce fine chemical products such as methyl ethyl ketone, valeraldehyde, isodecyl alcohol, etc., and has a wide range of uses. Polymer grade 1-butene can be produced by dimerization of ethylene. Since ethylene itself is very expensive, the production cost is very high and it cannot be applied on a large scale in industry. However, the mixed C4 produced in the cracking process of petroleum hydrocarbons can be removed by extraction. , After 3-butadiene, the carbon four after removing the ether of isobutene through etherification reaction is an excellent raw material for the production of high-purity 1-butene. Therefore, how to extract 1-butene fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/163C07C7/04C07C11/08B01D3/14B01D3/32
CPCC07C7/163C07C7/04C07C7/005B01D3/143B01D3/32C07C11/08Y02P20/10
Inventor 刘奉强周鹏庞泉德
Owner SHANDONG QILU PETROCHEM ENG