US3607963A - Separation of acetylene and ethylene from cracked gas - Google Patents

Separation of acetylene and ethylene from cracked gas Download PDF

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Publication number
US3607963A
US3607963A US798041A US3607963DA US3607963A US 3607963 A US3607963 A US 3607963A US 798041 A US798041 A US 798041A US 3607963D A US3607963D A US 3607963DA US 3607963 A US3607963 A US 3607963A
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United States
Prior art keywords
acetylene
gas
ethylene
condensate
cooling
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Expired - Lifetime
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US798041A
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English (en)
Inventor
Axel Danneil
Otto Nagel
Rolf Platz
Kurt Taglieber
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BASF SE
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BASF SE
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Priority claimed from DE19681643757 external-priority patent/DE1643757C3/de
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0238—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 2 carbon atoms or more
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/005—Processes comprising at least two steps in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0204—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
    • F25J3/0219—Refinery gas, cracking gas, coke oven gas, gaseous mixtures containing aliphatic unsaturated CnHm or gaseous mixtures of undefined nature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0271—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of H2/CO mixtures, i.e. of synthesis gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/74—Refluxing the column with at least a part of the partially condensed overhead gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
    • F25J2205/04—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum in the feed line, i.e. upstream of the fractionation step
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/50—Processes or apparatus using other separation and/or other processing means using absorption, i.e. with selective solvents or lean oil, heavier CnHm and including generally a regeneration step for the solvent or lean oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/12—Refinery or petrochemical off-gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/62—Ethane or ethylene
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/02—Recycle of a stream in general, e.g. a by-pass stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/04—Internal refrigeration with work-producing gas expansion loop

Definitions

  • This invention relates to a process for the production of acetylene and ethylene from cracked gas.
  • U.S. Pat. No. 3,471,584 discloses a process for the separation or" acetylene and ethylene from cracked gas also containing methane, ethane and hydrocarbons having from three to five carbon atoms with or without carbon oxysulfide and carbon disulfide, which gas has been obtained in the cracking of petroleum or petroleum fractions by a flame burning beneath the surface of the same and from which carbon dioxide and hydrogen sulfide have been removed, wherein the cracked gas is dried, part of the methane and the whole of the remaining hydrocarbons and any carbon oxysulfide and carbon disulfide are separated by condensation, the condensate is vaporized and compressed and then the acetylene and ethylene together with methane and ethane are separated by pressure distillation from a liquid fraction which contains the whole of the hydrocarbons having three to five carbon atoms and any carbon oxysulfide and carbon disulfide.
  • the condensate thus obtained being separated and the remaining gas mixture containing small amounts of acetylene being freed from acetylene by scrubbing with a liquid consisting of ethylene, ethane or a mixture thereof and the gas mixture devoid of acetylene then being cooled to 1 to 170 C.
  • the gas is further cooled to l40 to-l 70 C. to remove the residual ethylene and. ethane.
  • the necessary preliminary separation of the carbon dioxide and any sulfur for example in the form of hydrogen sulfide, may be carried out in known manner, for example by treatment with an aqueous solution of an alkali metal salt of an amino acid. Methods referred to in the main patent may generally be used for this purpose. This is also true of any fine purification from carbon dioxide and subsequent drying of the cracked gas devoid of carbon dioxide and hydrogen sulfide prior to condensation. In addition to the drying specified in the main patent, scrubbing with anhydrous methanol or saturation with methanol vapor has proved to be suitable. I
  • the condensation itself is generally carried out at a pressure of from 5 to .40 atmospheres.
  • a particular embodiment of the process consists in raising the temperature of the gas (cooled to -l40 to l70 C. after the ethylene wash) after condensate has again been separatedto to l00 C. countercurrent to the gas leaving the ethylene scrubber.
  • the gas mixture which has had its temperature raised in this way may be flashed in a flash unit with performance of external work so that the gas mixture is cooled and may be used for countercurrent cooling in the condensation stages.
  • the condensate deposited in the condensation stages or if desired, in a single condensation stage may be flashed and vaporized in countercurrent heat exchange for cooling the gas mixture.
  • the invention is illustrated by the following example.
  • the gas is cooled to 20 C., the condensate obtained being separated in a separator 3.
  • the remaining gas is passed through line 4 to a heat exchanger 5, cooled to 110 C. and freed from condensate in a separator 6.
  • the residual gas flows through line 7 into a column 8 in which by countercurrent scrubbing with a mixture consisting substantially of liquid ethylene and ethane it is freed from acetylene to such an extent that the acetylene content in line 9 is less that 1 percent (with reference to the mixture of acetylene and ethylene) so that upon further cooling to C. in a heat exchanger 10 no deposition of solid acetylene can take place.
  • Gas and liquid are separated in a separator 11.
  • the gas with a residual content of ethylene of 2,000 p.p.m. and of acetylene of less than 10 p.p.m. passes in line 12 through the heat exchanger 10 and is warmed to a temperature of 125 C. countercurrent to the current of gas in line 9 and supplied to a flash turbine 13.
  • the gas is expanded from 7.8 atmospheres to 1.4 atmospheres while performing external work, its temperature thus being lowered to 1 69 C.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
US798041A 1968-02-13 1969-02-10 Separation of acetylene and ethylene from cracked gas Expired - Lifetime US3607963A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681643757 DE1643757C3 (de) 1968-02-13 1968-02-13 Verfahren zur Gewinnung eines Acetylen, Xthan, Äthylen und C tief 3bis C tief 5 -Kohlenwasserstoffe enthaltenden Kondensats

Publications (1)

Publication Number Publication Date
US3607963A true US3607963A (en) 1971-09-21

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US798041A Expired - Lifetime US3607963A (en) 1968-02-13 1969-02-10 Separation of acetylene and ethylene from cracked gas

Country Status (7)

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US (1) US3607963A (un)
AT (1) AT288336B (un)
BE (1) BE728312A (un)
ES (1) ES363604A2 (un)
FR (1) FR2001799A1 (un)
GB (1) GB1248693A (un)
SE (1) SE348721B (un)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5516089A (en) * 1978-07-17 1980-02-04 Dut Pty Ltd Method of simultaneously cooling and dehydrating hydrocarbon gas mixture
US4336045A (en) * 1981-06-29 1982-06-22 Union Carbide Corporation Acetylene removal in ethylene and hydrogen separation and recovery process
US4735704A (en) * 1986-05-16 1988-04-05 Santa Fe Braun Inc. Liquid removal enhancement
AU584577B2 (en) * 1986-12-19 1989-05-25 M.W. Kellogg Company, The Process for separation of hydrocarbon gases
US4846863A (en) * 1987-02-18 1989-07-11 Costain Petrocarbon Limited Separation of hydrocarbon mixtures
US5358469A (en) * 1990-02-09 1994-10-25 Ultraflex Systems, Inc. Dynamic splint
US5421167A (en) * 1994-04-01 1995-06-06 The M. W. Kellogg Company Enhanced olefin recovery method
US5444176A (en) * 1992-10-28 1995-08-22 Exxon Chemical Patents Inc. Process for recovering olefins from cat-cracked gas without accumulating undesirable oxides of nitrogen
US5749840A (en) * 1989-12-07 1998-05-12 Ultraflex Systems, Inc. Dynamic splint
WO2016200053A1 (ko) * 2015-06-09 2016-12-15 주식회사 엘지화학 에틸렌을 회수하기 위한 분리방법 및 분리공정 시스템
WO2016200052A1 (ko) * 2015-06-09 2016-12-15 주식회사 엘지화학 에틸렌을 회수하기 위한 분리방법 및 분리공정 시스템

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492591A (en) * 1981-05-26 1985-01-08 Air Products And Chemicals, Inc. Method and apparatus for recovering hydrogen from a feed comprising methane, ethylene, hydrogen and acetylene
CN106016968A (zh) * 2016-07-14 2016-10-12 王嘉文 二氧化碳液化提纯的方法及设备

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0008857A1 (en) * 1978-07-17 1980-03-19 Dut Pty Limited Method of simultaneously cooling and removing water from hydrocarbon gas mixtures and apparatus therefor
JPH0117405B2 (un) * 1978-07-17 1989-03-30 Dut Pty Ltd
JPS5516089A (en) * 1978-07-17 1980-02-04 Dut Pty Ltd Method of simultaneously cooling and dehydrating hydrocarbon gas mixture
US4336045A (en) * 1981-06-29 1982-06-22 Union Carbide Corporation Acetylene removal in ethylene and hydrogen separation and recovery process
US4735704A (en) * 1986-05-16 1988-04-05 Santa Fe Braun Inc. Liquid removal enhancement
AU584577B2 (en) * 1986-12-19 1989-05-25 M.W. Kellogg Company, The Process for separation of hydrocarbon gases
US4846863A (en) * 1987-02-18 1989-07-11 Costain Petrocarbon Limited Separation of hydrocarbon mixtures
US5749840A (en) * 1989-12-07 1998-05-12 Ultraflex Systems, Inc. Dynamic splint
US5358469A (en) * 1990-02-09 1994-10-25 Ultraflex Systems, Inc. Dynamic splint
US5444176A (en) * 1992-10-28 1995-08-22 Exxon Chemical Patents Inc. Process for recovering olefins from cat-cracked gas without accumulating undesirable oxides of nitrogen
US5421167A (en) * 1994-04-01 1995-06-06 The M. W. Kellogg Company Enhanced olefin recovery method
WO2016200053A1 (ko) * 2015-06-09 2016-12-15 주식회사 엘지화학 에틸렌을 회수하기 위한 분리방법 및 분리공정 시스템
WO2016200052A1 (ko) * 2015-06-09 2016-12-15 주식회사 엘지화학 에틸렌을 회수하기 위한 분리방법 및 분리공정 시스템
CN106488898A (zh) * 2015-06-09 2017-03-08 株式会社Lg化学 用于回收乙烯的分离方法和分离工艺系统
US10315972B2 (en) 2015-06-09 2019-06-11 Lg Chem, Ltd. Separation method and separation process system for recovering ethylene
CN106488898B (zh) * 2015-06-09 2019-07-16 株式会社Lg化学 用于回收乙烯的分离方法和分离工艺系统
US10371442B2 (en) 2015-06-09 2019-08-06 Lg Chem, Ltd. Separation method and separation process system for recovering ethylene

Also Published As

Publication number Publication date
SE348721B (un) 1972-09-11
ES363604A2 (es) 1971-01-01
FR2001799A1 (un) 1969-10-03
GB1248693A (en) 1971-10-06
BE728312A (un) 1969-08-12
AT288336B (de) 1971-02-25

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