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GB788475A - Purifying synthetic alcohol by a distillation process - Google Patents

Purifying synthetic alcohol by a distillation process

Info

Publication number
GB788475A
GB788475A GB28066/55A GB2806655A GB788475A GB 788475 A GB788475 A GB 788475A GB 28066/55 A GB28066/55 A GB 28066/55A GB 2806655 A GB2806655 A GB 2806655A GB 788475 A GB788475 A GB 788475A
Authority
GB
United Kingdom
Prior art keywords
column
withdrawn
alcohol
line
per cent
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
GB28066/55A
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.)
National Petro-Chemicals Corp
Original Assignee
National Petro-Chemicals Corp
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 National Petro-Chemicals Corp filed Critical National Petro-Chemicals Corp
Publication of GB788475A publication Critical patent/GB788475A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
    • C07C29/03—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by addition of hydroxy groups to unsaturated carbon-to-carbon bonds, e.g. with the aid of H2O2
    • C07C29/04—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by addition of hydroxy groups to unsaturated carbon-to-carbon bonds, e.g. with the aid of H2O2 by hydration of carbon-to-carbon double bonds
    • 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
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B01D3/143—Fractional distillation or use of a fractionation or rectification column by two or more of a fractionation, separation or rectification step
    • B01D3/146—Multiple effect distillation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
    • C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
    • C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
    • C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
    • C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
    • C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
    • C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation
    • C07C29/84—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation by extractive distillation

Landscapes

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

Abstract

<PICT:0788475/III/1> Synthetic alcohols produced by the catalytic hydration of mono-olefins are purified by a three-stage distillation process comprising (i) subjecting the crude alcohol to fractional distillation to remove low-boiling impurities including all the ether, (ii) eliminating malodorous impurities such as polymer oils by submitting the alcohol to water-extractive distillation, (iii) rectifying the aqueous alcohol withdrawn as bottoms from the base of the extractive distillation column, whereby concentrated and odourless alcohol of high-purity is obtained. In an example, crude ethanol containing 58 per cent ethanol, 7.5 per cent diethyl ether, 0.5 per cent polymer oils and 34 per cent water, is heated to 200 DEG F. in preheater 1 and fed to 40-plate column 3. This column is operated at a pressure of 15 p.s.i.g., and is heated by live steam, introduced through line 4, to maintain a base-temperature of 210 DEG F. and a head-temperature of 125-130 DEG F. The distillate obtained at the top of the column is predominantly ether; this is divided into two streams, one of which is returned to the column as reflux, while the other is withdrawn from the system via line 9. Some of the more volatile polymer oil impurities accumulate in column 3 slightly above the feed, and are withdrawn via line 10. Dilute alcohol is withdrawn from the base of column 3, and is passed via cooler 12 to decanter 13, where it is diluted with water to adjust the concentration to about 30-45 per cent EtOH. Hydrocarbon oil impurities become insoluble and settle out as an upper layer, which is removed through line 14. The aqueous alcohol is pumped through line 17 into 45-plate column 18 where extractive distillation is effected, steam being introduced into the base of the column via line 20, and water being fed into the top of the column through line 19. The distillate is passed to decanter 24 where the oil impurities form an upper phase, which is withdrawn via line 25. The lower aqueous phase may be returned to column 18 as reflux, or it may be partially or wholly withdrawn through line 27. The bottoms stream from column 18, which contains 3 to 20 per cent EtOH, is pumped to 65-plate column 31, where the alcohol is rectified. Refined and concentrated alcohol is withdrawn from the system via line 37 or line 40. Heavy oils are withdrawn from column 31 through side-connections 38. The water withdrawn from the base of column 31 may, if desired, be partially or totally recycled to column 18.
GB28066/55A 1954-10-12 1955-10-03 Purifying synthetic alcohol by a distillation process Expired GB788475A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US788475XA 1954-10-12 1954-10-12

Publications (1)

Publication Number Publication Date
GB788475A true GB788475A (en) 1958-01-02

Family

ID=22146565

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28066/55A Expired GB788475A (en) 1954-10-12 1955-10-03 Purifying synthetic alcohol by a distillation process

Country Status (1)

Country Link
GB (1) GB788475A (en)

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