GB365076A - Improved process for dehydrating acetic acid - Google Patents

Improved process for dehydrating acetic acid

Info

Publication number
GB365076A
GB365076A GB3073930A GB3073930A GB365076A GB 365076 A GB365076 A GB 365076A GB 3073930 A GB3073930 A GB 3073930A GB 3073930 A GB3073930 A GB 3073930A GB 365076 A GB365076 A GB 365076A
Authority
GB
United Kingdom
Prior art keywords
acid
acetic acid
sulphur dioxide
nitric
nitrogen
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
GB3073930A
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to GB3073930A priority Critical patent/GB365076A/en
Publication of GB365076A publication Critical patent/GB365076A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42—Separation; Purification; Stabilisation; Use of additives
    • C07C51/487—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to chemical modification

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Acetic acid is dehydrated by forming nitrosyl sulphuric acid therein, for example by treating the acid with sulphur dioxide or trioxide and a suitable oxide of nitrogen. As the oxide of nitrogen, nitric peroxide can be used, but it may be replaced by a mixture of nitric oxide and oxygen, or by concentrated nitric acid. The sulphur dioxide may be developed in the solution from salts such as water soluble sulphites or bisulphites, or from organic sulphites such as ethyl sulphite. The acetic acid may be separated by distillation, preferably under reduced pressure, from the gases dissolved therein and from the sulphuric acid formed, or it may be used without separation of the gases or sulphuric acid in acetylation processes, for example, in the acetylation of cellulose. Cellulose (containing approximately 8 per cent of moisture) is treated with acetic acid, and nitric peroxide, sulphur dioxide and oxygen are introduced into the mass until the water is removed and crystals of nitrosyl sulphuric acid are formed. The pretreated cellulose may then be acetylated, with or without the removal of the oxides of nitrogen and sulphur dioxide, since these gases together act as catalysts for the reaction.
GB3073930A 1930-10-14 1930-10-14 Improved process for dehydrating acetic acid Expired GB365076A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3073930A GB365076A (en) 1930-10-14 1930-10-14 Improved process for dehydrating acetic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3073930A GB365076A (en) 1930-10-14 1930-10-14 Improved process for dehydrating acetic acid

Publications (1)

Publication Number Publication Date
GB365076A true GB365076A (en) 1932-01-14

Family

ID=10312369

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3073930A Expired GB365076A (en) 1930-10-14 1930-10-14 Improved process for dehydrating acetic acid

Country Status (1)

Country Link
GB (1) GB365076A (en)

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