GB823339A - Improvements in or relating to the distillation of ethanol - Google Patents

Improvements in or relating to the distillation of ethanol

Info

Publication number
GB823339A
GB823339A GB3512857A GB3512857A GB823339A GB 823339 A GB823339 A GB 823339A GB 3512857 A GB3512857 A GB 3512857A GB 3512857 A GB3512857 A GB 3512857A GB 823339 A GB823339 A GB 823339A
Authority
GB
United Kingdom
Prior art keywords
column
vapours
line
stripper
reflux
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
GB3512857A
Inventor
Gunnar Baecklund
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.)
CEMATUR AB
Original Assignee
CEMATUR 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 CEMATUR AB filed Critical CEMATUR AB
Priority to GB3512857A priority Critical patent/GB823339A/en
Publication of GB823339A publication Critical patent/GB823339A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D1/00Evaporating
    • B01D1/28Evaporating with vapour compression
    • B01D1/284Special features relating to the compressed vapour
    • B01D1/2856The compressed vapour is used for heating a reboiler or a heat exchanger outside an evaporator
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D3/00Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/001Processes specially adapted for distillation or rectification of fermented solutions

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

<PICT:0823339/III/1> Ethanol is separated from aqueous solutions thereof by stripping the solution in a beer still or stripping column, condensing part of the vapours obtained in a steam generator to produce steam which is compressed and used as heating medium in the stripper, introducing part of the vapours from the stripper into a rectifying column into which ethanol with a water content below that of the azeotropic mixture is introduced as reflux, condensing the overhead vapours and withdrawing the condensate as product. The vapours are preferably dehydrated and condensed and part of this condensate is used as the reflux to the rectifying column. Aqueous ethanol, e.g. mash containing 7 or 8% by weight of ethanol is introduced by line 7, heated and introduced to a preliminary stripper 2 containing 15-20 plates where volatile impurities such as acetaldehyde and esters are removed. Purified mash passes by line 14 to stripping column 1 containing 10-20 plates fed with live steam from ejector 23. The vapours partly pass by line 18 to be used as heating medium for the stripper 2 and partly to steam generator 16. Steam produced in the generator by condensation of the vapours passes by line 22 is compressed in the ejector 23 and passed to the stripper. Water from the base of the stripper is pumped by line 19 to the steam generator from which excess is withdrawn by line 21. Vapours from the stripper are further condensed in condenser 17 to provide reflux for the stripper. The amount of condensation in the condenser 17 may be regulated according to the temperature in the following column 3, more vapours being passed to the column if the temperature falls. Remaining vapours pass to rectifying column 3 having 10-20 plates and fed with a reflux containing less water than the azeotropic mixture by line 38. Bottoms are passed by line 29 for use as reflux to the stripper. Overhead vapours pass by line 28 to the dehydrating column 4 fed with a water-absorbing substance such as glycerol, acetates or, more preferably, ethylene glycol by line 30. This column may contain 15-20 plates in the lower part and 5-10 in the upper part. Vapours pass to heat exchanger 8 and condenser 34 to give liquid which is withdrawn as product by line 39 and returned as reflux to columns 3 and 4 by lines 38 and 37. The product may be anhydrous. Bottoms from column 4 containing glycol, ethanol and water pass to column 5 where ethanol is stripped by added live steam and returned to column 4. Bottoms from column 5 are fractionated under reduced pressure in column 6 to give glycol as bottoms which are pumped back to column 4 and water overhead. Fused oil may be withdrawn by line 13 and also if desired from one or more plates of column 3. The pH on the lower plates of column 3 and of the reflux to stripper 1 is preferably maintained at at least 4 by adding an alkaline solution to a higher plate of column 3 and allowing this to flow countercurrent to the vapours.
GB3512857A 1957-11-11 1957-11-11 Improvements in or relating to the distillation of ethanol Expired GB823339A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3512857A GB823339A (en) 1957-11-11 1957-11-11 Improvements in or relating to the distillation of ethanol

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3512857A GB823339A (en) 1957-11-11 1957-11-11 Improvements in or relating to the distillation of ethanol

Publications (1)

Publication Number Publication Date
GB823339A true GB823339A (en) 1959-11-11

Family

ID=10374163

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3512857A Expired GB823339A (en) 1957-11-11 1957-11-11 Improvements in or relating to the distillation of ethanol

Country Status (1)

Country Link
GB (1) GB823339A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4695349A (en) * 1984-03-07 1987-09-22 Linde Aktiengesellschaft Process and apparatus for distillation and/or stripping
FR2698374A1 (en) * 1992-11-24 1994-05-27 Ungda Rectification of low-alcohol@ wine - by using steam jet compressor at head of rectification column.
FR2699552A1 (en) * 1992-12-21 1994-06-24 Cogat Pierre Olivier Prodn. of low alcohol@ wines from conc. sugar prods.
US10350511B1 (en) * 2016-07-15 2019-07-16 Bioleap, Inc. Distillation reflux reduction

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4695349A (en) * 1984-03-07 1987-09-22 Linde Aktiengesellschaft Process and apparatus for distillation and/or stripping
FR2698374A1 (en) * 1992-11-24 1994-05-27 Ungda Rectification of low-alcohol@ wine - by using steam jet compressor at head of rectification column.
FR2699552A1 (en) * 1992-12-21 1994-06-24 Cogat Pierre Olivier Prodn. of low alcohol@ wines from conc. sugar prods.
US10350511B1 (en) * 2016-07-15 2019-07-16 Bioleap, Inc. Distillation reflux reduction

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