CN202379907U - Device for separating and preparing isopentane from light hydrocarbon - Google Patents
Device for separating and preparing isopentane from light hydrocarbon Download PDFInfo
- Publication number
- CN202379907U CN202379907U CN2011205250734U CN201120525073U CN202379907U CN 202379907 U CN202379907 U CN 202379907U CN 2011205250734 U CN2011205250734 U CN 2011205250734U CN 201120525073 U CN201120525073 U CN 201120525073U CN 202379907 U CN202379907 U CN 202379907U
- Authority
- CN
- China
- Prior art keywords
- removing column
- storage tank
- pentane
- tower
- iso
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 title claims abstract description 93
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 13
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 12
- 239000004215 Carbon black (E152) Substances 0.000 title abstract description 3
- 238000003860 storage Methods 0.000 claims abstract description 28
- 238000001179 sorption measurement Methods 0.000 claims abstract description 18
- 239000000470 constituent Substances 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229930195735 unsaturated hydrocarbon Natural products 0.000 abstract description 16
- 239000002994 raw material Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 8
- -1 polyethylene Polymers 0.000 description 7
- 238000000926 separation method Methods 0.000 description 6
- 241000282326 Felis catus Species 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 5
- 229920000573 polyethylene Polymers 0.000 description 5
- 239000003463 adsorbent Substances 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000098 polyolefin Polymers 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000012163 sequencing technique Methods 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000004230 Fast Yellow AB Substances 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical group CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model relates to a device for separating and preparing isopentane from light hydrocarbon; the raw material inlet of the light component removal tower is arranged in the middle of the tower body and is connected with the raw material tank through a raw material pump; an outlet at the top of the light component removal tower is connected with a storage tank A through a heat exchanger A, the storage tank A is connected with the upper part of the light component removal tower through a circulating pump A and is also connected with a light component storage tank, and an outlet at the bottom of the light component removal tower is connected with an inlet positioned in the middle of the heavy component removal tower; the top outlet of the heavy component removal tower is connected with a storage tank B through a heat exchanger B, the storage tank B is connected with the upper part of the heavy component removal tower through a circulating pump B and is simultaneously connected with an inlet positioned at the bottom of the adsorption tower, and an outlet at the bottom of the heavy component removal tower is connected with a heavy component storage tank; an outlet at the top of the adsorption tower is connected with a product storage tank through a condenser and a pump C; the bottom of the light component removal tower and the bottom of the heavy component removal tower are respectively provided with a heat exchanger C and a heat exchanger D; the purity of the product isopentane of the device is more than 99 percent, and the content of unsaturated hydrocarbon is lower than 30ppm and is adjustable.
Description
Technical field
The utility model relates to a kind of employing precise distillation-adsorption separation technology, from lighter hydrocarbons, separates and produces the device of unsaturated hydrocarbons content less than 30ppm iso-pentane solvent.
Background technology
Along with improving constantly of polyethylene production technology, also increasingly high to solvent iso-pentane index request, polyethylene device requires to be increased to 30ppm by 500ppm to unsaturated hydrocarbons content's index in the iso-pentane.
CN1232816 discloses and has a kind ofly prepared the method for iso-pentane through three fractionation and hydrogenation technique, but the purity of the iso-pentane of its preparation does not reach the requirement of polyethylene device.
US6286335, US6173584, CN1300930 disclose the separation method and the device of paraffins mixture; But its separate object does not contain C5 alkene in the paraffins mixture, can't be applied to the purification of the iso-pentane that polyethylene device uses; " reduce the research and the application of iso-pentane acid number " equally; Also be inappropriate for the purification of polyethylene device with iso-pentane, the document adopts rectification method purification iso-pentane, from iso-pentane, removes CO2.
ZL200610165315.7 has invented the precise distillation technology utilized, and adopts three tower process to produce the method for polyolefine with the iso-pentane solvent, and technology is simple, still requires in the raw material unsaturated hydrocarbons content low, and range of application receives certain limitation.
The producer of domestic production iso-pentane has increased the hydroprocessing unit for unsaturated hydrocarbons content's index in the iso-pentane is required to reduce to 30ppm by 500ppm, to take off the unsaturated hydrocarbons in the iso-pentane, causes complex process, and production cost raises.
The utility model content
It is raw material with lighter hydrocarbons that the purpose of the utility model provides a kind of, adopts precise distillation-adsorption separation technology to produce polyolefin device and uses the iso-pentane device.
The described a kind of device of producing iso-pentane that from lighter hydrocarbons, separates of the utility model is made up of lightness-removing column, weight-removing column and adsorption tower; The lightness-removing column material inlet is arranged on the middle part of tower body, is connected with head tank through feedstock pump; Lightness-removing column ejects mouth and is connected with storage tank A through interchanger A, and storage tank A is connected with lightness-removing column top through recycle pump A, is connected with the light constituent storage tank simultaneously, and the lightness-removing column outlet at bottom is connected with the import that is positioned at the weight-removing column middle part; Weight-removing column ejects mouth and is connected with storage tank B through interchanger B, and storage tank B is connected with weight-removing column top through recycle pump B, is connected with the inlet that is positioned at the adsorption tower bottom simultaneously, and the weight-removing column outlet at bottom is connected with the heavy constituent storage tank; The absorption tower top outlet is connected with the product storage tank through condensing surface, pump C; Lightness-removing column and weight-removing column bottom are respectively equipped with interchanger C and interchanger D.
Raw material is isolated the weight component through lightness-removing column, weight-removing column, obtain purity greater than 95% meet the polyolefin device purity requirement thick iso-pentane product, thick iso-pentane product gets into adsorption tower, further sloughs C
5Unsaturated hydrocarbons, wherein: the number of theoretical plate of lightness-removing column is 30-150, working pressure is 0.6-1.5MPa, tower top temperature 20-60 ℃, column bottom temperature 70-190 ℃; The number of theoretical plate of weight-removing column is 40-160, and working pressure is 0.1-1.0MPa, tower top temperature 20-80 ℃, and column bottom temperature 60-190 ℃; Adsorption tower working pressure 0.1-0.6MPa, adsorption temp 20-150 ℃, residence time 0.01-60s; Sorbent material adopts the zeolite molecular sieve or the molecular sieve of load metal-containing salt thus, after adsorbents adsorb is saturated, at temperature 200-500 ℃; Nitrogen or air existence condition be regeneration down, uses from multiple.
Wherein weight-removing column and lightness-removing column are precise rectification towers.
The separation sequence of said raw material is according to the sequencing of lightness-removing column, weight-removing column and adsorption tower.Perhaps according to the sequencing of weight-removing column, lightness-removing column and adsorption tower.
Scheme one (process flow sheet such as Fig. 1): the step that comprises does
(1) raw material that contains than low-carbon (LC) five unsaturated hydrocarbons gets into lightness-removing column, and the component lighter than iso-pentane distillates from cat head, and iso-pentane and heavier component distillate at the bottom of tower.
(2) iso-pentane and heavier component get into weight-removing column, and the component heavier than iso-pentane distillates at the bottom of tower, and thick product iso-pentane distillates from cat head.In this tower, C such as part 1-amylene, 2-methyl-1-butene alkene
5Unsaturated hydrocarbons and Skellysolve A and heavier component distillate at the bottom of tower, and cat head is higher iso-pentane of purity and the extremely low C of content
5The thick iso-pentane product of unsaturated hydrocarbons.
(3) the thick product of iso-pentane gets into adsorption tower, behind the adsorbents adsorb unsaturated hydrocarbons, obtain qualified iso-pentane product, and unsaturated hydrocarbons content can be regulated in the iso-pentane according to customer requirements.
The step that scheme two comprises does
(1) raw material that contains than low-carbon (LC) pentaene hydrocarbon gets into weight-removing column, and iso-pentane and lighter component distillate from cat head, than heavy at the bottom of tower, the distillating of iso-pentane.
(2) iso-pentane and lighter component get into lightness-removing column, and the component lighter than iso-pentane distillates from cat head, and the unsaturated hydrocarbons of iso-pentane and trace distillates at the bottom of tower.
(3) iso-pentane and micro-unsaturated hydrocarbons get into adsorption tower, behind the adsorbents adsorb unsaturated hydrocarbons, obtain qualified iso-pentane product, and unsaturated hydrocarbons content can be regulated in the iso-pentane according to customer requirements.
The shortcoming that the utility model exists to precise distillation technology; Behind precise rectification tower, increased absorptive separation column; Further remove the unsaturated hydrocarbons in the precise distillation product iso-pentane; Guarantee that presence of unsaturates is lower than 30ppm in the iso-pentane, and can obtain the lower iso-pentane of unsaturated hydrocarbons content according to customer requirements.Compare with hydrogenation-rectification process, the adsorptive separation technology mild condition, the iso-pentane that comes out from weight-removing column need not change processing condition and directly get into adsorption tower and remove unsaturated hydrocarbons, and need not add external components such as hydrogen.
Description of drawings
Fig. 1: from lighter hydrocarbons, separate the device synoptic diagram of producing iso-pentane
Embodiment
The described a kind of device of producing iso-pentane that from lighter hydrocarbons, separates of the utility model is made up of lightness-removing column T101, weight-removing column T102 and adsorption tower T103; Lightness-removing column T101 material inlet is arranged on the middle part of tower body, is connected with mother tube through feedstock pump 1-1; Lightness-removing column ejects mouth and is connected with storage tank AV101 through interchanger AE101, and storage tank AV101 is connected with lightness-removing column top through recycle pump A1-2, is connected with the light constituent storage tank simultaneously, and the lightness-removing column outlet at bottom is connected with the import that is positioned at the weight-removing column middle part; Weight-removing column ejects mouth and is connected with storage tank BV102 through interchanger BE103, and storage tank BV102 is connected with weight-removing column top through recycle pump B1-3, is connected with the inlet that is positioned at adsorption tower T103 bottom simultaneously, and the weight-removing column outlet at bottom is connected with the heavy constituent storage tank; The absorption tower top outlet is connected with the product storage tank through condensing surface E105, pump C1-4; Lightness-removing column T101 and weight-removing column T102 bottom are respectively equipped with interchanger CE102 and interchanger DE104.
Claims (1)
1. one kind is separated the device produce iso-pentane and is made up of lightness-removing column, weight-removing column and adsorption tower from lighter hydrocarbons; It is characterized in that: the lightness-removing column material inlet is arranged on the middle part of tower body, is connected with head tank through feedstock pump; Lightness-removing column ejects mouth and is connected with storage tank A through interchanger A, and storage tank A is connected with lightness-removing column top through recycle pump A, is connected with the light constituent storage tank simultaneously, and the lightness-removing column outlet at bottom is connected with the import that is positioned at the weight-removing column middle part; Weight-removing column ejects mouth and is connected with storage tank B through interchanger B, and storage tank B is connected with weight-removing column top through recycle pump B, is connected with the inlet that is positioned at the adsorption tower bottom simultaneously, and the weight-removing column outlet at bottom is connected with the heavy constituent storage tank; The absorption tower top outlet is connected with the product storage tank through condensing surface, pump C; Lightness-removing column and weight-removing column bottom are respectively equipped with interchanger C and interchanger D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205250734U CN202379907U (en) | 2011-12-15 | 2011-12-15 | Device for separating and preparing isopentane from light hydrocarbon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205250734U CN202379907U (en) | 2011-12-15 | 2011-12-15 | Device for separating and preparing isopentane from light hydrocarbon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202379907U true CN202379907U (en) | 2012-08-15 |
Family
ID=46628425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205250734U Expired - Lifetime CN202379907U (en) | 2011-12-15 | 2011-12-15 | Device for separating and preparing isopentane from light hydrocarbon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202379907U (en) |
-
2011
- 2011-12-15 CN CN2011205250734U patent/CN202379907U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120815 |
|
| CX01 | Expiry of patent term |