. Introduction: • Co-products of PVC production in Vietnam from coconut shell charcoal activated method at temperatures of 900-1.0000C. • Effect: de color, odor, heavy metals, organic compounds, pesticides. 2. Technical characteristics: • Particle size: 1.68 to 3.36 mm (mesh size 6-12), from 2.36 to 4.76 mm (mesh size 4-8) • Density: 520-550 kg/m3 • type of black beans, dry, loose, angular. • The basic criteria: The iodine number: 650 - 850 mg / g Adsorption of CCl4: 40 - 60% Benzene: 23 - 33% Methylene Blue: 130 to 170 ml / g Hardness:> = 95% Ash: 2-5% Humidity: =