Phthalic anhydride production is a catalytic process

Journal Article · Wed Dec 31 23:00:00 EST 1975 · Coke Chem., USSR (Engl. Transl.); (United States)

OSTI ID:5295338

Andreikov, E I; Zhilina, N B; Rus'yanova, N D; Lyapkin, A A

This survey of the effects of impurities in technical naphthalene on the catalytic production of phthalic anhydride suggests that the feedstock should meet certain basic requirements. Naphthalene for phthalic anhydride production should contain minimum amounts of phenols, bases, unsaturated compounds and indole, and the latter should be completely excluded if possible. The thionaphthene content should be at least 1%, and should be up to 2% if indole cannot be excluded. On the other hand, maintaining the correct balance of indole and thionaphthene only ensures stable catalyst performance; the problem of increased resin formation remains. The feedstock can contain up to 10% methylnaphthalenes. Among the technical naphthalenes currently available, these requirements are met more closely by the distilled naphthalene from NTMK and technical naphthalene grade V. The changeover to technical naphthalene as the basic feedstock for phthalic anhydride production need not entail loss of efficiency, provided certain precautions are taken. The most important variables are the detailed compositions of the technical naphthalene grades, with particular reference to their indole and thionaphthene contents, in the light of the requirements discussed.

• OSTI ID: 5295338
• Journal Information: Coke Chem., USSR (Engl. Transl.); (United States), Journal Name: Coke Chem., USSR (Engl. Transl.); (United States) Vol. 9; ISSN COKCA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010401* -- Coal & Coal Products-- Carbonization-- (-1987)
010500 -- Coal
Lignite
& Peat-- Products & By-Products
AROMATICS
BY-PRODUCTS
CARBOXYLIC ACIDS
CATALYSTS
CHEMICAL FEEDSTOCKS
COKE OVENS
CONDENSED AROMATICS
DICARBOXYLIC ACIDS
HYDROCARBONS
IMPURITIES
NAPHTHALENE
ORGANIC ACIDS
ORGANIC COMPOUNDS
PHTHALIC ACID
POISONING
PRODUCTION
REGENERATION