Which company produces phthalic anhydride?

The companies engaged in the production of phthalic anhydride are BASF (Germany), Shandong Hongxin (China), Nan-Ya Plastics (Taiwan), ExxonMobil Chemical (U.S.), Aekyung Petrochemical (Japan), IG Petrochemicals (India), Polynt SPA (Italy), and Koppers Industries (U.S.).

What is phthalic anhydride made of?

Phthalic anhydride is presently obtained by catalytic oxidation of ortho–xylene or naphthalene. When separating the phthalic anhydride from production by products such as o–xylene in water, or maleic anhydride, a series of “switch condensers” is required. Phthalic anhydride can also be prepared from phthalic acid.

Which catalyst is used for the production of phthalic anhydride?

vanadium pentoxide
The reactors contain the catalyst, vanadium pentoxide, and are operated at 650 to 725-F (340 to 385-C).

What is phthalic anhydride used for?

Phthalic anhydride is widely used worldwide for an extremely broad range of applications spanning from the plastics industry to the synthesis of resins, agricultural fungicides and amines. Its production is currently based on the vapor phase oxidation of o-xylene and naphthalene.

What are the products of Thirumalai Chemicals?

DETAILED APPLICATIONS

  • Carbonated Beverages. Adding Malic Acid improves artificially sweetened products.
  • Non-carbonated Beverages.
  • Ciders and Wines.
  • Confectionaries.
  • Hard Candy.
  • Soft Candy.
  • Powdered Mixes.
  • Calcium Supplements and Calcium-fortified Beverages.

How is Phthalimide made?

How is Phthalimide formed? Phthalimide can be prepared by heating alcoholic ammonia with phthalic anhydride, which yields 95–97 per cent. Alternatively, it can be prepared by taking ammonium carbonate or urea to treat the anhydride. It may also be caused by o-xylene ammoxidation.

How do you make phthalic acid?

Production. Phthalic acid is produced by the catalytic oxidation of naphthalene or ortho-xylene directly to phthalic anhydride and a subsequent hydrolysis of the anhydride. Phthalic acid was first obtained by French chemist Auguste Laurent in 1836 by oxidizing naphthalene tetrachloride.

When o-xylene is used for production of phthalic anhydride is?

A process for the manufacture of phthalic anhydride by oxidizing o-xylene and/or naphthalene over a supported catalyst containing vanadium pentoxide and titanium dioxide, at from 350° to 500° C, in which the o-xylene or naphthalene is passed, with an oxygen-containing carrier gas, over the catalyst, and in which the …

When O-Xylene is used for production of phthalic anhydride is?

Which reactor is recommended for an air oxidation of naphthalene to phthalic anhydride?

fluidized bed reactor
Naphthalene-based feedstock is made up of vaporized naphthalene and compressed air. It is transferred to the fluidized bed reactor and oxidized in the presence of a catalyst, vanadium pentoxide, at 650 to 725-F (340 to 385-C).

Can you eat phthalic anhydride?

Moderately toxic by inhalation or ingestion and a skin irritant.