GB865698A - Process for the extraction and recovery of aromatic hydrocarbons from a liquid hydrocarbon mixture - Google Patents

Process for the extraction and recovery of aromatic hydrocarbons from a liquid hydrocarbon mixture

Info

Publication number
GB865698A
GB865698A GB424359A GB424359A GB865698A GB 865698 A GB865698 A GB 865698A GB 424359 A GB424359 A GB 424359A GB 424359 A GB424359 A GB 424359A GB 865698 A GB865698 A GB 865698A
Authority
GB
United Kingdom
Prior art keywords
stripping zone
solvent
extraction
extract
feed
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
Application number
GB424359A
Inventor
Gerrit Hendrik Reman
Frederik Johannes Zuiderweg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Priority to GB424359A priority Critical patent/GB865698A/en
Publication of GB865698A publication Critical patent/GB865698A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
    • 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
    • C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
    • C10G21/06—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents characterised by the solvent used
    • C10G21/12—Organic compounds only

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Aromatic hydrocarbons are recovered from hydrocarbon mixtures by introducing the mixture into a counterflow multistage extraction system operated at 140-170 DEG C and employing a solvent boiling in the range of 225-295 DEG C. and containing dissolved water in an amount of not more than 2% by weight; cooling the solvent-extract phase by at least 15 DEG C to 115-150 DEG C; introducing the extract without appreciable flash vapourisation into a stripping zone operated at at least 1,5 atmospheres absolute, a top temperature of 115-150 DEG C and a bottom temperature of at least 165 DEG C; condensing the vapours, removing all water separating as a separate phase and recycling the remainder to the extraction system either at the end where the extract is withdrawn and/or at an intermediate point; and distilling the bottoms from the stripping zone at less than 0,5 atmosphere absolute and a bottom temperature of at least 145 DEG C. and at least 10 DEG C lower than the bottom temperature of the stripping zone. The solvent may be diethylene and/or dipropylene glycol or sulfolane. The process is particularly suitable for catalytic reformates having a final boiling point not higher than 220 DEG C and a lower cutting point about 100 DEG C. The volumetric ratio of solvent to hydrocarbon may be between 3:1 and 8:1 and the ratio of top product from the stripping zone to hydrocarbon feed may be between 0,2 and 0,7:1. The extraction may be effected in a column containing packing or sieve plates, a rotating disc contactor or a number of mixer-settler units, the number of theoretical stages being at least 5. The feed may be introduced at the first or second theoretical stage. Top product from the stripping zone is also preferably introduced at the first or second stage. The pressure in the stripping zone, and the temperature of the feed to it, should be regulated so that the weight ratio of vapour in the extract to fresh feed to the extraction system is below 1:10 and preferably no vapour is present. The difference between top and bottom temperatures in the stripping zone is preferably at least 40 DEG C, maintained by a reboiler. The bottoms from the stripping zone is distilled to separate hydrocarbons and solvent which is recycled to the extraction using live steam. Specification 739,200 is referred to.
GB424359A 1959-02-06 1959-02-06 Process for the extraction and recovery of aromatic hydrocarbons from a liquid hydrocarbon mixture Expired GB865698A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB424359A GB865698A (en) 1959-02-06 1959-02-06 Process for the extraction and recovery of aromatic hydrocarbons from a liquid hydrocarbon mixture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB424359A GB865698A (en) 1959-02-06 1959-02-06 Process for the extraction and recovery of aromatic hydrocarbons from a liquid hydrocarbon mixture

Publications (1)

Publication Number Publication Date
GB865698A true GB865698A (en) 1961-04-19

Family

ID=9773429

Family Applications (1)

Application Number Title Priority Date Filing Date
GB424359A Expired GB865698A (en) 1959-02-06 1959-02-06 Process for the extraction and recovery of aromatic hydrocarbons from a liquid hydrocarbon mixture

Country Status (1)

Country Link
GB (1) GB865698A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0043267A1 (en) * 1980-06-30 1982-01-06 Union Carbide Corporation Method of separating aromatic and nonaromatic hydrocarbons in mixed hydrocarbon feeds
EP0043685A1 (en) * 1980-06-30 1982-01-13 Union Carbide Corporation Method of separating aromatic and nonaromatic hydrocarbons in mixed hydrocarbon feeds
US4571295A (en) * 1983-05-13 1986-02-18 Union Carbide Corporation Aromatic/nonaromatic separations
US4781820A (en) * 1985-07-05 1988-11-01 Union Carbide Corporation Aromatic extraction process using mixed polyalkylene glycols/glycol ether solvents

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0043267A1 (en) * 1980-06-30 1982-01-06 Union Carbide Corporation Method of separating aromatic and nonaromatic hydrocarbons in mixed hydrocarbon feeds
EP0043685A1 (en) * 1980-06-30 1982-01-13 Union Carbide Corporation Method of separating aromatic and nonaromatic hydrocarbons in mixed hydrocarbon feeds
US4571295A (en) * 1983-05-13 1986-02-18 Union Carbide Corporation Aromatic/nonaromatic separations
US4781820A (en) * 1985-07-05 1988-11-01 Union Carbide Corporation Aromatic extraction process using mixed polyalkylene glycols/glycol ether solvents

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