EP 2081878 A2 20090729 - SULPHUR FERTILIZER AND GRANULATED SULPHUR FERTILIZER MANUFACTURING METHOD
Title (en)
SULPHUR FERTILIZER AND GRANULATED SULPHUR FERTILIZER MANUFACTURING METHOD
Title (de)
SCHWEFELDÜNGER UND VERFAHREN ZUR HERSTELLUNG VON GRANULATFÖRMIGEM SCHWEFELDÜNGER
Title (fr)
ENGRAIS SOUFRÉ ET PROCÉDÉ DE FABRICATION D'ENGRAIS SOUFRÉ EN GRANULÉS
Publication
Application
Priority
- PL 2007000059 W 20070820
- PL 38049006 A 20060825
Abstract (en)
[origin: WO2008024007A2] The invention covers sulphur fertilizer, in form of globular granules or pellets constituting solidified mixture of liquid sulphur, bentonite and lignosulfonates, and alternatively fertilizing additives. In its solidified mixture, the fertilizer contains 60-95% of sulphur, 4-20% of sodium or calcium bentonite, and 1-8% of calcium or sodium lignosulfonate. According to the invention, the method applied to produce granulated sulphur fertilizer is characterised by the following: the mixture of liquid sulphur with bentonite and alternatively with lignosulfonate or fertilizing additives is splashed in the granulator at the temperature of 120-150° C to form micro-drops, onto a curtain made by falling granules. Then, micro-drops are solidified layer by layer on surfaces of falling granules at the temperature of 90-115° C in a stream of air flowing through the curtain. At the same time, additional coolant is sprayed to cool the air. Granules and worn out coolant with air and dust are removed from the process in separate streams, while granules leaving the process are kept at the temperature of 40-90° C, and subgrain returned to the process favourably cools down to the temperature under 30° C.
IPC 8 full level
CPC (source: EP)
C05G 5/36 (2020.02)
Citation (search report)
See references of WO 2008024007A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
WO 2008024007 A2 20080228; WO 2008024007 A3 20080703; EP 2081878 A2 20090729; PL 206943 B1 20101029; PL 380490 A1 20080303; UA 96161 C2 20111010
DOCDB simple family (application)
PL 2007000059 W 20070820; EP 07793963 A 20070820; PL 38049006 A 20060825; UA A200902799 A 20070820