GB640178A - Improvements in or relating to the dehydration of coal tar and similar products by distillation - Google Patents

Improvements in or relating to the dehydration of coal tar and similar products by distillation

Info

Publication number
GB640178A
GB640178A GB25410/47A GB2541047A GB640178A GB 640178 A GB640178 A GB 640178A GB 25410/47 A GB25410/47 A GB 25410/47A GB 2541047 A GB2541047 A GB 2541047A GB 640178 A GB640178 A GB 640178A
Authority
GB
United Kingdom
Prior art keywords
column
tar
water
dehydrated
pipe
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
GB25410/47A
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.)
EXPL DES PROCEDES DER HALDE AB
Original Assignee
EXPL DES PROCEDES DER HALDE AB
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 EXPL DES PROCEDES DER HALDE AB filed Critical EXPL DES PROCEDES DER HALDE AB
Publication of GB640178A publication Critical patent/GB640178A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
    • B01D3/36—Azeotropic distillation
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
    • C10C1/00—Working-up tar
    • C10C1/02—Removal of water
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
    • C10C1/00—Working-up tar
    • C10C1/04—Working-up tar by distillation
    • C10C1/06—Removal of water

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

<PICT:0640178/III/1> Crude coal tar or similar products are dehydrated by azeotropic distillation using an added light hydrocarbon oil, such as benzol, as water-entrainer. After condensation of the vapours and separation of water from the condensate, the light oil is recycled to the still in admixture with the crude tar. Dehydration down to a water content of only 0.1 per cent is thereby carried out at a low temperature, i.e. close to 100 DEG C.; and foaming is eliminated. The tar may be dehydrated in column 3 which is fitted with a steam-heater 4 and perforated splash-plates 5. The top of the column is connected to a condenser 9 and decanter 11. Tank 1, to which the crude tar is supplied, is connected to the side of the column by two routes; one contains a pump 2 for supplying feed to the column, while the other is for the return of overflow from the constant liquid-level in the column. About 100 litres of light oil is added for every cubic meter of tar in the column, and the temperature of the liquid is raised to 100-110 DEG C. to distil off the azeotropic mixture. The vapours are condensed and the condensate is decanted; water being discharged through pipe 12, while the light oil is passed to tank 1 through pipe 13. Dehydrated tar is withdrawn from the base of column 3 through pipe 8.
GB25410/47A 1947-07-07 1947-09-17 Improvements in or relating to the dehydration of coal tar and similar products by distillation Expired GB640178A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR640178X 1947-07-07

Publications (1)

Publication Number Publication Date
GB640178A true GB640178A (en) 1950-07-12

Family

ID=8997284

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25410/47A Expired GB640178A (en) 1947-07-07 1947-09-17 Improvements in or relating to the dehydration of coal tar and similar products by distillation

Country Status (1)

Country Link
GB (1) GB640178A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509028A (en) * 1967-06-29 1970-04-28 Goodyear Tire & Rubber Drying p-cresol by distillation with toluene

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509028A (en) * 1967-06-29 1970-04-28 Goodyear Tire & Rubber Drying p-cresol by distillation with toluene

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