AMINOUREAFORMALDEHYDE FERTILIZER METHOD AND COMPOSITION
申请公布号:WO1994015890(A1)
申请号:US1993012653
申请日期:1993.12.30
申请公布日期:1994.07.21
摘要:<p>A new method of preparing a new aminoureaformaldehyde fertilizer composition which exhibits high cold water insoluble nitrogen (CWIN) levels and high Availability Indices (AI). The method utilizes the discoveries that ammonia compounds, usually ammonium salts, inhibit the urea-formaldehyde polymerization reaction and decrease the formation of hot water insoluble nitrogen (HWIN), and that the ammonium compounds take part in the reaction to form controlled release compounds which are both cold water soluble and insoluble. The process is carried out at elevated temperatures between 60 and 125 °F, so that it may be completed in an order of magnitude less time than either the dilute or concentrated conventional commercial ureaform processes, requiring between 2 and 20 minutes for completion. In the process, between 3 and 25 per cent of the total nitrogen is supplied as ammonia nitrogen with the remainder from urea, respective formaldehyde to urea to ammonia mol ratio is 1.0, between 1.0 and 2.0 and between 0.05 and 1.0. The new fertilizer composition is produced directly as semi-dry granules, and exhibits urea conversions to CWIN between 50 and 85 per cent with AIs higher than 45.</p>
FLOWER VASE SHAPED LIGHTING DEVICE
CABLE TYPE SHIFT LOCK MECHANISM FOR AUTOMATIC TRANSMISSION
FIXING OF HEAVY METALS IN FLY ASH
METHOD AND DEVICE FOR EXECUTING SEQUENTIAL MULTITHREAD
LUBRICANT FOR ROLLING SEAMLESS STEEL TUBE
ANTIMICROBIAL LIQUID AGENT FOR CEMENT AND GYPSUM
DRAWING OF HIGH-MOLECULAR WEIGHT POLYOLEFIN AND APPARATUS THEREFOR
MODIFICATION OF WHISKER SURFACE AND ALUMINUM ALLOY COMPOUND MATERIAL
BLOCK COPOLYMER COMPOSITION AND ITS HEAT-SHRINKABLE FILM
EASY-TO-TEAR FILM AND MANUFACTURE THEREOF
FORMING METHOD OF CONDUCTIVE MICRO PATTERN
PROMOTER FOR GERMINATION AND ROOTING OF PLANT