GB342119A - Improvements in or relating to the extraction of formic acid from the residual lye from the purification of cellulose - Google Patents

Improvements in or relating to the extraction of formic acid from the residual lye from the purification of cellulose

Info

Publication number
GB342119A
GB342119A GB2237/30A GB223730A GB342119A GB 342119 A GB342119 A GB 342119A GB 2237/30 A GB2237/30 A GB 2237/30A GB 223730 A GB223730 A GB 223730A GB 342119 A GB342119 A GB 342119A
Authority
GB
United Kingdom
Prior art keywords
cellulose
acid
formic acid
purification
relating
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
GB2237/30A
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.)
Papeteries Navarre SA
Original Assignee
Papeteries Navarre SA
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 Papeteries Navarre SA filed Critical Papeteries Navarre SA
Publication of GB342119A publication Critical patent/GB342119A/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
    • C07C51/48—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Extraction Or Liquid Replacement (AREA)

Abstract

The liquor which has been used for purifying cellulose by the process of Specification 318,868, or reduced pressure, while vapours of nitric acid, [Class 2 (ii), Cellulose &c.], is treated with an acid or acid salt such as sulphuric acid or sodium bisulphite and formic acid is distilled off. Preferably concentrated lye is used. Sodium sulphate is recovered from the residue by lixiviation before or after calcination.ALSO:Formic acid is obtained from the liquor which has been used for purifying cellulose by the process of Specification 318,868, [Class 2 (ii), Cellulose &c.], by adding an acid or acid salt such as sulphuric acid or sodium bisulphate, and distilling. Preferably concentrated lye is used. Sodium sulphate is recovered from the residue by lixiviation before or after calcination.
GB2237/30A 1929-11-30 1930-01-22 Improvements in or relating to the extraction of formic acid from the residual lye from the purification of cellulose Expired GB342119A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR342119X 1929-11-30

Publications (1)

Publication Number Publication Date
GB342119A true GB342119A (en) 1931-01-29

Family

ID=8891966

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2237/30A Expired GB342119A (en) 1929-11-30 1930-01-22 Improvements in or relating to the extraction of formic acid from the residual lye from the purification of cellulose

Country Status (1)

Country Link
GB (1) GB342119A (en)

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