Prodn. of floatable materials for absorption beds - by carbonising pre-expanded grain, esp. useful in anaerobic waste water treatment plants

• Main Authors: GIZYCKI, ULRICH VON., 5090 LEVERKUSEN, DE, BONIN, WULF VON., 5068 ODENTHAL, DE
• Format: Patent
• Language: English; German
• Published: 17.09.1992
• Subjects: ARTIFICIAL STONE; BLASTING; BUILDING; CEILINGS; CEMENTS; CERAMICS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; ENGINEERING ELEMENTS AND UNITS; FIXED CONSTRUCTIONS; FLOORS; GENERAL BUILDING CONSTRUCTIONS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INSULATION OR OTHER PROTECTION OF BUILDINGS; JOINTS OR FITTINGS FOR PIPES; LIGHTING; LIME, MAGNESIA; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PIPES; REFRACTORIES; ROOFS; SLAG; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; THERMAL INSULATION IN GENERAL; TRANSPORTING; TREATMENT OF NATURAL STONE; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WALLS, e.g. PARTITIONS; WEAPONS

Prodn. is effected by carbonising pre-expanded natural 'fruits' (esp. grains) at 180-450 deg.C. The starting material is popcorn, puffed wheat or puffed rice. Carbonisation is effected in the presence of air, opt. in a closed vessel to form a moulded prod. USE - The floatable materials are...