Intro to Products

C4LPG

Butane is a hydrocarbon with four carbon atoms bonded together and has two isomers, C4LPG and isobutane.

Used as fuel and it is a colorless gas at ambient temperature and atmospheric pressure.

CAS number : 106-97-8 / Molecular formula : C4H10

Plant processes

The isobutane plant produce high-purity isobutane through distillation using the difference in boiling points of C4LPG and isobutane. After high-purity butane(C4LPG with Olefine less than 100 wt ppm) is produced through the second hydrogenation reaction with butane(C4LPG with Olefine less than 4 mol%) converted by the hydrogenation reaction of C4 Raffinate produced from each plant.

  • Hydrogenation Reaction Unit
    This unit mixes the high-purity C4LPG (with Olefine less than 4 mol%), produced in C4 hydrogenation with hydrogen, passes it through the catalytic layer of the 2-tier reactor and lowers Olefine to less than 100 wt ppm, and sends C4LPG at the bottom of the reactor to the stabilization column. The stabilization column is a packing tower, and discharges the off-gas to the top of the column, and the C4LPG at the bottom of the column to the butane separation column.
  • Isobutane Fractionation Unit
    Off gas is emitted from the upper part of the isobutane fractionation tower, and isobutane products are produced by SIDE CUT. From the bottom, C4LPG is produced.
  • Moisture Removal and DME Removal Unit
    The moisture (20wt ppm) contained in the Isobutane product is lowered by the dryer to 1wt ppm, and sent to the DME (Dimethylether) removal tower for removal of DME, and to the Isobutane storage tank.
Product uses

C4LPG is utilized as fuel.

  • Butane Gas
Product inquiry
Product inquiry List
Product Speciality Contact person Phone number Inquiry
C4LPG Lee Seung-hwan 82-2-6370-5426 Mail inquiry
Properties
C4LPG
Specifications List
Test Item Unit Test Method Specification
VAPOR PRESSURE
(at 37.8 /40 ℃)
PSIG
MPa
ASTM D 1267 MAX 70
MAX 0.52
C3'S & LIGHTER M-% ASTM D 2163 RECORD
C4’S M-% ASTM D 2163 MIN 85
BUTADIENE M-% ASTM D 2163 MAX 0.5
COPPER CORROSION - ASTM D 1838 MAX NO.1
RESIDUE IN EVAPORATION mL /100mL ASTM D 2158 MAX 0.05
95% EVAPORATION TEMP ASTM D 1837 MAX 2.2
T-SULFUR Wt-ppm ASTM D 6667 MAX 200
WATER - ASTM D 2713 PASS
C4LPG (OCT)
Properties List
Test Item Unit Test Method Specification
C3'S & LIGHTER M-% ASTM D 2163 MIN 2.0
C4LPG M-% ASTM D 2163 MIN 68.0
ISOBUTANE M-% ASTM D 2163 MAX 29.0
C5’S & HEAVIER M-% ASTM D 2163 MAX 3.0
TOTAL OLEFIN M-% ASTM D 2163 MAX 3.5
TBC Wt-ppm ASTM D 1157 MAX 10
NMP Wt-ppm BY GC MAX 10
T-SULFUR Wt-ppm ASTM D 6667 MAX 10
WATER - VISUAL NO FREE WATER

* The above specifications represent standards may differ from the actual subject matter.