Where does phthalic anhydride come from?
Where does phthalic anhydride come from?
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.
How is phthalic anhydride formed?
Phthalic anhydride is mostly produced by selective oxidation of o-xylene fed as a gas. Because of the high exothermicity of the reaction, multitubular reactors cooled by molten salts are the standard technology.
What is the Colour and shape of phthalic anhydride?
Phthalic anhydride appears as a colorless to white lustrous solid in the form of needles with a mild distinctive odor.
What is the common name of phthalic anhydride?
Phthalic anhydride
| Names | |
|---|---|
| Preferred IUPAC name 2-Benzofuran-1,3-dione | |
| Other names Isobenzofuran-1,3-dione Phthalic anhydride | |
| Identifiers | |
| CAS Number | 85-44-9 |
Is phthalic anhydride corrosive?
► Phthallic Anhydride is a DOT CORROSIVE. OSHA: The legal airborne permissible exposure limit (PEL) is 12 mg/m3 averaged over an 8-hour workshift.
What is the formula of phthalic acid?
C8H6O4
Phthalic acid/Formula
Is phthalic anhydride soluble?
Phthalic anhydride is the organic compound with the formula C6H4(CO)2O. It is the anhydride of phthalic acid. Phthalic anhydride is a principal commercial form of phthalic acid….Phthalic anhydride.
| Names | |
|---|---|
| Solubility in water | 0.62 g/100g (20—25 °C); 19.0 g/100g (100 °C); reacts slowly |
| Vapor pressure | 0.0015 mmHg (20 °C) |
Is maleic anhydride corrosive?
DOT#: UN 2215 ERG Guide #: 156 Hazard Class: 8 (Corrosive) COMBUSTIBLE SOLID Use CO2, water spray or alcohol-resistant foam as extinguishing agents. Maleic Anhydride reacts with WATER to release HEAT and Maleic Acid.
What is the Colour of succinic anhydride?
colorless
This colorless solid is the acid anhydride of succinic acid….Succinic anhydride.
| Names | |
|---|---|
| Appearance | Colorless crystalline needles |
| Density | 1.23 g/cm3 |
| Melting point | 119 to 120 °C (246 to 248 °F; 392 to 393 K) |
| Boiling point | 261 °C (502 °F; 534 K) |
What is the use of phthalic anhydride?
The primary use of phthalic anhydride (PA) is as a chemical intermediate in the production of plasticizers from polyvinyl chloride (PVC). The primary use of phthalic anhydride (PA) is as a chemical intermediate in the production of plastics from vinyl chloride.
What is the meaning of phthalic anhydride?
Phthalic anhydride is the organic compound with the formula C6H4(CO)2O. It is the anhydride of phthalic acid. It was the first anhydride of a dicarboxylic acid to be used commercially. This white solid is an important industrial chemical, especially for the large-scale production of plasticizers for plastics.