GB883042A - Method of purifying naphthalene - Google Patents

Method of purifying naphthalene

Info

Publication number
GB883042A
GB883042A GB11975/60A GB1197560A GB883042A GB 883042 A GB883042 A GB 883042A GB 11975/60 A GB11975/60 A GB 11975/60A GB 1197560 A GB1197560 A GB 1197560A GB 883042 A GB883042 A GB 883042A
Authority
GB
United Kingdom
Prior art keywords
naphthalene
parts
reflux
sulphuric acid
purified
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
GB11975/60A
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.)
Wyeth Holdings LLC
Original Assignee
American Cyanamid 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 American Cyanamid Co filed Critical American Cyanamid Co
Publication of GB883042A publication Critical patent/GB883042A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/148—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound
    • C07C7/17—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound with acids or sulfur oxides
    • C07C7/171—Sulfuric acid or oleum

Landscapes

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

Abstract

Acid washed naphthalene is further purified by distilling in the presence of at least 0,1% by weight of an alkali metal hydroxide. The naphthalene preferably has a setting point of at least 79,5 DEG C. having been purified by sulphuric acid washing or treatment with formaldehyde and sulphuric acid. The caustic alkali, preferably used in amounts of 0,3-2%, may be used as finely divided solid or 10-30% aqueous solution. In the examples, 1,000 parts of naphthalene are distilled, 5 parts being removed at 90% reflux and the main fraction of 880 parts at 50% reflux.ALSO:Acid washed naphthalene is further purified by distilling in the presence of at least 0.1% by weight of an alkali metal hydroxide. The naphthalene preferably has a setting point of at least 79.5 DEG C. having been purified by sulphuric acid washing treatment with formaldehyde and sulphuric acid. The caustic alkali, preferably used in amounts of 0.3%-2%, may be used as finely divided solid or 10%-30% aqueous solution. In the examples, 1,000 parts of naphthalene are distilled, 5 parts being removed at 90% reflux and the main fraction of 880 parts at 50% reflux.
GB11975/60A 1960-02-12 1960-04-05 Method of purifying naphthalene Expired GB883042A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US883042XA 1960-02-12 1960-02-12

Publications (1)

Publication Number Publication Date
GB883042A true GB883042A (en) 1961-11-22

Family

ID=22210587

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11975/60A Expired GB883042A (en) 1960-02-12 1960-04-05 Method of purifying naphthalene

Country Status (1)

Country Link
GB (1) GB883042A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525777A (en) * 1968-12-23 1970-08-25 United States Steel Corp Method of recovering naphthalene

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525777A (en) * 1968-12-23 1970-08-25 United States Steel Corp Method of recovering naphthalene

Similar Documents

Publication Publication Date Title
JPS5629572A (en) Purification of percarboxylic acid organic solution
GB883042A (en) Method of purifying naphthalene
ES356618A1 (en) Purification of aqueous hydrogen peroxide solutions containing dissolved organic compound by use of nonionic porous resin
GB762205A (en) Purification of acrylonitrile
ES268941A1 (en) Process for the manufacture of cyclodecanol-(1)-one (6)
GB435965A (en) Process for the treatment of benzols, petrols and other hydrocarbons
GB932988A (en) Improvements in or relating to tobacco products
GB950168A (en) Purification of para-aminodiphenylamine
GB909945A (en) Stabilized hydrogen peroxide
GB910130A (en) Diphenylamine purification process
GB887908A (en) A process for the purification of isoprene
GB550854A (en) Improvements in or relating to the manufacture of esters of chlorine containing organic acids
GB939873A (en) Manufacture of dinitrotoluene
GB1023856A (en) Method for purifying aqueous solutions of methylbutynol
GB760054A (en) Purification of naphthalene
ES280225A1 (en) Improved process for the purification of caprolactam
GB928126A (en) Process for the production of lead hydroxide oxide 5 pb0.2ho
GB888659A (en) Purification of adiponitrile
GB846172A (en) Purification of benzene
BE598093A (en) Process for the recovery of adipic acid precursors, such as cyclohexanol and cyclohexanone.
GB810500A (en) 1, 2-epoxy-2-methyl pentane and its conversion to 2-methyl-pentanal-1
GB906859A (en) Process of refining benzene
GB550853A (en) Improvements in the manufacture of esters of chlorine-containing organic acids
GB586133A (en) Improvements in or relating to the recovery of crotonic acid
BE587528A (en) Extraction of formic acid from aqueous solutions of pentaerythritol