GB1484201A - Process for dewaxing liquid hydrocarbon mixtures - Google Patents

Process for dewaxing liquid hydrocarbon mixtures

Info

Publication number
GB1484201A
GB1484201A GB2843574A GB2843574A GB1484201A GB 1484201 A GB1484201 A GB 1484201A GB 2843574 A GB2843574 A GB 2843574A GB 2843574 A GB2843574 A GB 2843574A GB 1484201 A GB1484201 A GB 1484201A
Authority
GB
United Kingdom
Prior art keywords
oil
dispersion
column
urea
solution
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
GB2843574A
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.)
Wintershall Dea Deutschland AG
Original Assignee
Deutsche Texaco AG
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 Deutsche Texaco AG filed Critical Deutsche Texaco AG
Priority to GB2843574A priority Critical patent/GB1484201A/en
Publication of GB1484201A publication Critical patent/GB1484201A/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
    • C10G73/00—Recovery or refining of mineral waxes, e.g. montan wax
    • C10G73/02—Recovery of petroleum waxes from hydrocarbon oils; Dewaxing of hydrocarbon oils
    • C10G73/24—Recovery of petroleum waxes from hydrocarbon oils; Dewaxing of hydrocarbon oils by formation of adducts

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)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

1484201 Dewaxing oils DEUTSCHE TEXACO AG 27 Jan 1975 28435/74 Heading C5E Mineral oil (e.g. refrigerator oil) containing less than 2 wt. per cent of n-paraffins is dewaxed by (a) dissolving the oil in an organic solvent which does not form an adduct with urea and in which urea is substantially insoluble, (b) mixing the oil solution with an excess (e.g. 10-20 fold) of solid urea; (c) vigorously mixing the oil solution and urea to form a dispersion of solid urea and adduct in the solution, and (d) separating the dispersion to provide a solids-free solution of dewaxed oil. The process can be carried out by introducing a dispersion of oil solution and solid urea into the central portion of a decanting column, withdrawing a solids-free solution of the dewaxed oil from the upper end of the column, and withdrawing the dispersion from the lower end of the column (e.g. after an average-residence of 10-80 minutes at 25-45‹ C.) by means of a pump and recycling it to the central portion of the column after dividing a partial stream from the dispersion. The partial stream is separated into a solids-free stream, which is either combined with the solids-free solution withdrawn from the top of the column or returned to the circulating dispersion, and a solids portion which is decomposed by heating or extraction with fresh solvent to recover urea, which is recycled to the column, and n-paraffins.
GB2843574A 1975-01-27 1975-01-27 Process for dewaxing liquid hydrocarbon mixtures Expired GB1484201A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2843574A GB1484201A (en) 1975-01-27 1975-01-27 Process for dewaxing liquid hydrocarbon mixtures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2843574A GB1484201A (en) 1975-01-27 1975-01-27 Process for dewaxing liquid hydrocarbon mixtures

Publications (1)

Publication Number Publication Date
GB1484201A true GB1484201A (en) 1977-09-01

Family

ID=10275587

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2843574A Expired GB1484201A (en) 1975-01-27 1975-01-27 Process for dewaxing liquid hydrocarbon mixtures

Country Status (1)

Country Link
GB (1) GB1484201A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112745889A (en) * 2019-10-30 2021-05-04 中国石油化工股份有限公司 Method for reducing cloud point of lubricating oil base oil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112745889A (en) * 2019-10-30 2021-05-04 中国石油化工股份有限公司 Method for reducing cloud point of lubricating oil base oil
CN112745889B (en) * 2019-10-30 2023-01-10 中国石油化工股份有限公司 Method for reducing cloud point of lubricating oil base oil

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee