KR20010054298A - A process for separating para-xylene using xylene column - Google Patents
A process for separating para-xylene using xylene column Download PDFInfo
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- KR20010054298A KR20010054298A KR1019990055066A KR19990055066A KR20010054298A KR 20010054298 A KR20010054298 A KR 20010054298A KR 1019990055066 A KR1019990055066 A KR 1019990055066A KR 19990055066 A KR19990055066 A KR 19990055066A KR 20010054298 A KR20010054298 A KR 20010054298A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G7/00—Distillation of hydrocarbon oils
- C10G7/08—Azeotropic or extractive distillation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/143—Fractional distillation or use of a fractionation or rectification column by two or more of a fractionation, separation or rectification step
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1096—Aromatics or polyaromatics
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- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
본 발명은 자일렌 컬럼을 이용하여 C8 이상 화합물의 혼합물을 C8 화합물의 혼합물과 C9 이상 화합물의 혼합물로 분리하고, 자일렌 컬럼 상단부에 바이패스(bypass)를 설치하여 o-자일렌, m-자일렌 및 에틸벤젠 등을 배출시키고, 자일렌 컬럼 투입부에 바이패스를 설치하여 자일렌 컬럼 하단부에 C8 이상 화합물의 혼합물을 동시에 투입시킴을 특징으로 하는 자일렌 컬럼을 이용한 파라-자일렌의 분리 공정에 관한 것이다.In the present invention, a mixture of C8 or more compounds is separated into a mixture of C8 and C9 compounds by using a xylene column, and a bypass is installed at the top of the xylene column to provide o-xylene and m-xyl. Separation process of para-xylene using a xylene column characterized by discharging ethylene and ethylbenzene, and installing a bypass at the xylene column inlet and simultaneously injecting a mixture of C8 or more compounds at the bottom of the xylene column. It is about.
파라-자일렌은 프탈산(phthalic acid)의 합성 원료이고, 또한 프탈산은 폴리에스테르 섬유의 중요한 원료가 된다. 이와 같은 파라-자일렌은 일반적으로 개질화된 탄화수소 화합물을 분리하여 제조된다.Para-xylene is a synthetic raw material of phthalic acid, and phthalic acid is also an important raw material of polyester fiber. Such para-xylene is generally prepared by separating the modified hydrocarbon compound.
일반적인 고리형 탄화수소 화합물의 분리는 증류컬럼에서 비점 차이로 분리되며, 이때 일반적으로 고분자 화합물은 비점이 높고 저분자 화합물은 비점이 낮기 때문에 증류 컬럼 상부에서는 비점이 낮은 저분자 화합물이 분리되고, 증류 컬럼 하부에서는 비점이 높은 고분자 화합물이 분리된다.In general, cyclic hydrocarbon compounds are separated by a difference in boiling point in a distillation column. In this case, low molecular weight compounds are separated at the top of the distillation column because polymer compounds have high boiling points and low molecular weight compounds have low boiling points. High boiling point polymer compounds are separated.
또한 분리된 화합물에서 원하는 물질을 분리시킨 후, 기타 물질을 회수하거나, 순환시키는 공정을 설계함으로서 원하는 화합물을 분리하게 된다.In addition, the desired compound is separated by designing a process for recovering or circulating other substances after separating a desired substance from the separated compound.
본 발명은 파라-자일렌을 분리하기 위한 자일렌 컬럼 등에서의 과부하현상을 해소하기 위해 자일렌 컬럼의 투입 방식과 분리 배출 방식을 개선하여 바이패스(bypass)를 설치하여 파라-자일렌을 더욱 효율적으로 분리하기 위한 공정 개선을 이룩한 것이다.The present invention improves the input and separation discharge method of the xylene column in order to solve the overload phenomenon in the xylene column for separating the para-xylene to install the bypass (bypass) more efficient para-xylene The process improvement for the separation is achieved.
도 1은 종래의 자일렌 컬럼을 이용한 파라-자일렌의 분리 공정도이다.1 is a separation process diagram of para-xylene using a conventional xylene column.
도 2는 본 발명의 자일렌 컬럼을 이용한 파라-자일렌의 분리 공정도이다.2 is a separation process diagram of para-xylene using the xylene column of the present invention.
※ 도면부호 설명※ Explanation of Drawings
10 : 리포메이트 스플리터(Reformate splitter)10: Reformate splitter
20 : 자일렌 컬럼, 30 : 파라-자일렌 분리기20: xylene column, 30: para-xylene separator
40 : 이성화 장치, 50 : 디헵타나이저(dehaptanizer)40 isomerization apparatus, 50 deheptanizer (dehaptanizer)
따라서 본 발명의 목적은 C8 이상 화합물의 혼합물을 자일렌 컬럼을 이용하여 C8 화합물의 혼합물과 C9 이상 화합물의 혼합물로 분리함에 있어서, 자일렌 컬럼(20) 최상부의 파라-자일렌 배출구와 동시에 자일렌 컬럼(20) 상부 약 1/7 위치에 바이패스를 설치하여 직접 이성화 장치(40)로 투입케 하고, 자일렌 컬럼(20) 약 1/2 위치와 2/3 위치에 C8 이상 화합물의 혼합물을 동시에 투입함을 특징으로 하는 자일렌 컬럼을 이용한 파라-자일렌 분리 공정을 제공하는 것이다.Accordingly, it is an object of the present invention to separate a mixture of C8 and higher compounds into a mixture of C8 and C9 compounds using a xylene column, simultaneously with the xylene and the para-xylene outlet on top of the xylene column 20. Bypass is installed at approximately 1/7 position on the top of the column 20 to direct input to the isomerization unit 40, and a mixture of C8 or more compounds at approximately 1/2 and 2/3 positions of the xylene column 20 It is to provide a para-xylene separation process using a xylene column, characterized in that the input at the same time.
또한 이때 자일렌 컬럼(20) 상부에서 상부 약 1/7 위치에서 바이패스를 통하여 이성화 장치(40)로 투입되는 화합물은 o-자일렌, m-자일렌 및 에틸벤젠임을 특징으로 하고, 이성화 장치(40)에서 이성화되어 이성화된 화합물 중 파라-자일렌을디헵타나이저(50)에서 분리하고 나머지 화합물인 o-자일렌, m-자일렌 및 에틸벤젠은 회수하여 자일렌 컬럼(20) 상단부 약 1/6 ∼1/5 위치에 재순환시킴을 특징으로 한다.In this case, the compound introduced into the isomerization device 40 through the bypass at the upper approximately 1/7 position in the upper part of the xylene column 20 is characterized in that o-xylene, m-xylene and ethylbenzene, Para-xylene of the isomerized compound isomerized in (40) is separated from the diheptanizer (50), and the remaining compounds o-xylene, m-xylene and ethylbenzene are recovered to recover the upper part of the xylene column (20). Recirculation at positions 1/6 to 1/5.
이하 본 발명을 첨부한 도면에 의거 더욱 상세히 설명한다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.
도 1은 종래의 자일렌 컬럼(20)을 이용한 파라-자일렌 분리 방법을 나타낸 것으로, 자일렌 컬럼(20) 최상단부에서 분리된 C8 화합물의 혼합물중 파라-자일렌은 파라-자일렌 분리기(30)에서 분리되고, 나머지 화합물의 혼합물은 이성화 장치(40)에서 이성화되어 이성화된 화합물중 파라-자일렌만을 분리하고 나머지 화합물, 즉 o-자일렌, m-자일렌 및 에틸벤젠은 회수되어 자일렌 컬럼(20)으로 재순환됨을 나타내고 있다.1 shows a para-xylene separation method using a conventional xylene column 20. In the mixture of C8 compounds separated at the top of the xylene column 20, para-xylene is a para-xylene separator ( 30), the mixture of the remaining compounds isomerized in the isomerization device 40 to separate only para-xylene among the isomerized compounds and the remaining compounds, i.e., o-xylene, m-xylene and ethylbenzene, are recovered and xylated. It is shown that it is recycled to the lene column 20.
그러나 도 1에 나타난 바와 같이 자일렌 컬럼(20)의 최상부에서는 극히 소량의 화합물들만이 증류되므로 자일렌 컬럼(20) 및 파라-자일렌 분리기(30)의 작동시 많은 부하가 생겨 파라-자일렌의 생산에 한계가 있다.However, as shown in FIG. 1, only a small amount of compounds are distilled at the top of the xylene column 20, so that a large load is generated when the xylene column 20 and the para-xylene separator 30 are operated. There is a limit to the production.
도 2는 본 발명의 자일렌 컬럼(20)을 이용한 파라-자일렌의 분리 공정도로서, 종래와는 달리 자일렌 컬럼(20) 최상부의 파라-자일렌 배출구와 동시에 자일렌 컬럼(20) 상부 약 1/7 위치에 바이패스를 설치하여 직접 이성화 장치(40)로 투입케하고, 자일렌 컬럼(20) 약 1/2 위치와 2/3 위치에 C8 이상 화합물의 혼합물을 동시에 투입함을 상세히 도시하고 있다.2 is a separation process diagram of para-xylene using the xylene column 20 of the present invention, unlike the prior art, the upper part of the xylene column 20 simultaneously with the para-xylene outlet at the top of the xylene column 20 is shown. The bypass is installed at the 1/7 position to be directly introduced into the isomerization device 40, and the mixture of the C8 or more compound is simultaneously introduced into the xylene column 20 at about 1/2 and 2/3 positions. Doing.
이러한 투입 경로의 분산과 파라-자일렌을 포함한 C8 화합물의 혼합물의 분리를 더욱 용이하게 함으로서 파라-자일렌 분리기(30)의 과부하 문제를 해결한 것이다.The overload problem of the para-xylene separator 30 is solved by more easily dispersing the input route and separating the mixture of the C8 compound including para-xylene.
본 발명의 효과는 자일렌 컬럼(20)의 투입 루트를 다양화하고 바이패스를 설치하여 C8 화합물의 혼합물을 분리케 함으로서 파라-자일렌 분리기(30)의 과부하가 해소되며 또한 감소된 부하만큼 이성화 장치(40)의 부하를 증가시킴으로서 디헵타나이저(50)에서 파라-자일렌 생산을 증가시키는 효과가 있는 것이다.The effect of the present invention is to diversify the input route of the xylene column 20 and to install a bypass to separate the mixture of C8 compounds, thereby overloading the para-xylene separator 30 and isomerizing by the reduced load. Increasing the load of the device 40 has the effect of increasing para-xylene production in the deheptanizer 50.
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| KR1019990055066A KR100330766B1 (en) | 1999-12-06 | 1999-12-06 | A process for separating para-xylene using xylene column |
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| KR1019990055066A KR100330766B1 (en) | 1999-12-06 | 1999-12-06 | A process for separating para-xylene using xylene column |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009025993A2 (en) * | 2007-08-17 | 2009-02-26 | Uop Llc | Method and apparatus for altering a feed to a reaction zone |
| US7686946B2 (en) | 2007-08-17 | 2010-03-30 | Uop Llc | Method of altering a feed to a reaction zone |
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1999
- 1999-12-06 KR KR1019990055066A patent/KR100330766B1/en active IP Right Grant
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009025993A2 (en) * | 2007-08-17 | 2009-02-26 | Uop Llc | Method and apparatus for altering a feed to a reaction zone |
| WO2009025993A3 (en) * | 2007-08-17 | 2009-04-30 | Uop Llc | Method and apparatus for altering a feed to a reaction zone |
| US7686946B2 (en) | 2007-08-17 | 2010-03-30 | Uop Llc | Method of altering a feed to a reaction zone |
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