GB871511A - Vapor phase process for the manufacture of diphenylamine - Google Patents

Vapor phase process for the manufacture of diphenylamine

Info

Publication number
GB871511A
GB871511A GB29248/57A GB2924857A GB871511A GB 871511 A GB871511 A GB 871511A GB 29248/57 A GB29248/57 A GB 29248/57A GB 2924857 A GB2924857 A GB 2924857A GB 871511 A GB871511 A GB 871511A
Authority
GB
United Kingdom
Prior art keywords
alumina
diphenylamine
passed
aniline
catalyst
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
GB29248/57A
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 GB871511A publication Critical patent/GB871511A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
    • C07C209/64—Preparation of compounds containing amino groups bound to a carbon skeleton by disproportionation

Landscapes

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

Abstract

The process of the parent Specification for the production of diphenylamine is modified in that undiluted aniline vapour at a pressure between 100 and 200 lbs./sq. inch gauge is passed in continuous manner into a reaction chamber maintained at 400-550 DEG C. and containing a non-base-exchanging catalyst, such as activated alumina or titania, which has a surface area greater than 100 square metres per gram. A preferred catalyst may be obtained by precipitating alumina from sodium aluminate solution with acid, and igniting the alumina gel to form an amorphous non-cyrstalline alumina with a surface area of from 100 to 400 sq. metres per gram. In one example, aniline vapour at 445 DEG C. is passed continuously into a reaction chamber maintained at 480 DEG C. and containing activated alumina, and the product is passed to a condenser and thence to a storage tank. Feed rates of 2,0, 3,2 and 4,0 grams of aniline flowing per hour per c.c. of catalyst, and pressures from 100 to 140 lbs./sq. inch gauge are specified. The yields of diphenylamine obtained under various conditions of operation are indicated graphically.
GB29248/57A 1956-09-21 1957-09-17 Vapor phase process for the manufacture of diphenylamine Expired GB871511A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US871511XA 1956-09-21 1956-09-21

Publications (1)

Publication Number Publication Date
GB871511A true GB871511A (en) 1961-06-28

Family

ID=22203400

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29248/57A Expired GB871511A (en) 1956-09-21 1957-09-17 Vapor phase process for the manufacture of diphenylamine

Country Status (1)

Country Link
GB (1) GB871511A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5071798A (en) * 1988-09-26 1991-12-10 Nichias Corporation Heat-resistant and inorganic shaped article

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5071798A (en) * 1988-09-26 1991-12-10 Nichias Corporation Heat-resistant and inorganic shaped article

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