GB877622A - Isopropanol purification process - Google Patents

Isopropanol purification process

Info

Publication number
GB877622A
GB877622A GB34810/57A GB3481057A GB877622A GB 877622 A GB877622 A GB 877622A GB 34810/57 A GB34810/57 A GB 34810/57A GB 3481057 A GB3481057 A GB 3481057A GB 877622 A GB877622 A GB 877622A
Authority
GB
United Kingdom
Prior art keywords
isopropanol
column
aqueous
water
crude
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
GB34810/57A
Inventor
Eric Lloyd Jones
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.)
Distillers Co Yeast Ltd
Distillers Co Ltd
Original Assignee
Distillers Co Yeast Ltd
Distillers Co Ltd
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 Distillers Co Yeast Ltd, Distillers Co Ltd filed Critical Distillers Co Yeast Ltd
Priority to GB34810/57A priority Critical patent/GB877622A/en
Publication of GB877622A publication Critical patent/GB877622A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C29/00Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
    • C07C29/74Separation; Purification; Use of additives, e.g. for stabilisation

Landscapes

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

Abstract

Aqueous isopropanol is recovered by a distillation process (see Group III) from crude aqueous isopropanol, such as is obtained by the sulphuric acid hydration of propylene, and is then dehydrated, at least in part, by contact with a suitable inorganic salt or an aqueous solution thereof. Specified salts are potassium carbonate, ammonium carbonate and ammonium nitrate, but the second Provisional Specification refers also to potassium fluoride. A 50% aqueous potassium carbonate solution is used in the example.ALSO:In recovering isopropanol from crude aqueous isopropanol, such as is obtained by the sulphuric acid hydration of propylene, the crude isopropanol is first distilled in the presence of water under such conditions that the concentration of isopropanol in the liquid at the base of the distillation column is not more than 3 moles per 100 moles of water. The crude isopropanol is preferably fed to an intermediate point in the distillation column and the water is preferably introduced at a higher point, preferably at a temperature of at least 90 DEG C. The column is preferably operated without external reflux. The dilute aqueous isopropanol from the base of the column is then distilled in a rectification column from which purified aqueous isopropanol, which may be of approximately azeotropic concentration, is withdrawn as an overhead product. This latter column is preferably operated with external reflux, a small amount of which may be removed to prevent the accumulation of volatile impurities in the column. A bleed of a fraction having a boiling point between that of the distillate and that of the liquid in the bottom of the column may also be withdrawn from an intermediate point on the column to remove impurities. The product from the top of the second column is then freed from water, at least in part, by contact with a suitable inorganic salt, or its aqueous solution, and this treatment may be followed by distillation to provide substantially dry isopropanol. Specified salts are potassium carbonate, ammonium carbonate and ammonium nitrate, but the second Provisional Specification refers also to potassium fluoride. In the example, the purified aqueous isopropanol from the top of the second column is treated in counterflow with a 50% aqueous potassium carbonate solution, and the partly dehydrated isopropanol is passed to a distillation column, from the base of which isopropanol containing only about 0.3% of water is withdrawn.
GB34810/57A 1957-11-08 1957-11-08 Isopropanol purification process Expired GB877622A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB34810/57A GB877622A (en) 1957-11-08 1957-11-08 Isopropanol purification process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB34810/57A GB877622A (en) 1957-11-08 1957-11-08 Isopropanol purification process

Publications (1)

Publication Number Publication Date
GB877622A true GB877622A (en) 1961-09-20

Family

ID=10370190

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34810/57A Expired GB877622A (en) 1957-11-08 1957-11-08 Isopropanol purification process

Country Status (1)

Country Link
GB (1) GB877622A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4454359A (en) * 1982-06-21 1984-06-12 The Procter & Gamble Company Process for drying alcohols
CN107021872A (en) * 2017-05-10 2017-08-08 天津九源化工工程有限公司 A kind of process for separation and purification of aqueous isopropanol
CN111377799A (en) * 2018-12-31 2020-07-07 江苏苏博特新材料股份有限公司 3-methyl-3-butene-1-ol dehydration method and device thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4454359A (en) * 1982-06-21 1984-06-12 The Procter & Gamble Company Process for drying alcohols
CN107021872A (en) * 2017-05-10 2017-08-08 天津九源化工工程有限公司 A kind of process for separation and purification of aqueous isopropanol
CN111377799A (en) * 2018-12-31 2020-07-07 江苏苏博特新材料股份有限公司 3-methyl-3-butene-1-ol dehydration method and device thereof
CN111377799B (en) * 2018-12-31 2022-12-02 江苏苏博特新材料股份有限公司 3-methyl-3-butene-1-ol dehydration method and device thereof

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