Application:
Paraxylene is primarily used as a basic raw material in the manufacture of terephthalic acid (TPA), purified terephthalic acid (PTA) and dimethyl-terephthalate (DMT). TPA, PTA and DMT are used to manufacture polyethylene terephthalate (PET) saturated polyester polymers. Polyesters are used to produce fibers and films. PET bottles are widely used for water because of its non-breakage properties as well as carbonated beverages because of good carbon dioxide barrier properties. In addition, they are light-weight, shatter-resistant and possess high tensile strength. Polyester uses include:
• Carbonated and non-carbonated beverage containers
• Containers for household chemicals, toiletries, cosmetics, etc.
• Fabrics for curtains, upholstery, clothing, etc.
• Microwave oven packaging material
• Films for x-rays, magnetic tapes, photographic film and electrical insulation
• Packaging for boil-in bags, processed meats, shrink films and blister packs
Also of extreme importance is the availability of various methods for recycling polyester and the wide acceptance of products produced from recycled polyester.
PARA XYLENE
| # |
Property |
Specification Value |
ASTM Method |
| 1 |
Purity wt. % |
99.0 min |
ASTM D 3798-89 |
| 2 |
Non aromatics wt. % |
0.2 max |
ASTM D 3798-89 |
| 3 |
m-Xylene wt. % |
0.3 max |
ASTM D 3798-89 |
| 4 |
o-Xylene wt. % |
0.1max |
ASTM D 3798-89 |
| 5 |
Ethylbenzene wt. % |
0.5 max |
ASTM D 3798-89 |
| 6 |
Toluene wt. % |
0.1 max |
ASTM D 3798-89 |
| 7 |
Appearance |
Clear liquid free of sedimentation |
VISUAL |
| or haze at 18.3 to 25.6 `c |
| 8 |
Color, Pt-co scale |
20 max |
ASTM D 1209-84 |
| 9 |
Distillation range `c at 760 mm Hg |
20 max includeing 138.3 |
ASTM D 850-79 |
| 10 |
Total Sulfur wt. ppm |
1.0 max |
ASTM D 4045-87 |
| 11 |
Specific Gravity at 15.56/15.56 `c |
0.865 - 0.867 |
ASTM D 4052-86 |