US 11,806,689 B2
Method of making a fertilizer seed core
Satish Burla, Bangalore (IN); Rajamalleswaramma Koripelly, Bangalore (IN); Gurumallappa Yoganand, Bangalore (IN); Samik Gupta, Bengaluru (IN); and Sabeshan Kanagalingam, Riyadh (SA)
Assigned to SABIC GLOBAL TECHNOLOGIES B.V., Bergen op Zoom (NL)
Appl. No. 16/076,105
Filed by SABIC Global Technologies B.V., Bergen op Zoom (NL)
PCT Filed Feb. 8, 2017, PCT No. PCT/IB2017/050683
§ 371(c)(1), (2) Date Aug. 7, 2018,
PCT Pub. No. WO2017/137902, PCT Pub. Date Aug. 17, 2017.
Claims priority of provisional application 62/292,393, filed on Feb. 8, 2016.
Prior Publication US 2021/0070671 A1, Mar. 11, 2021
Int. Cl. B01J 2/20 (2006.01); B29C 48/345 (2019.01); B29C 48/04 (2019.01); B30B 11/22 (2006.01); B29C 48/285 (2019.01); C05G 5/12 (2020.01); B29L 31/00 (2006.01)
CPC B01J 2/20 (2013.01) [B29C 48/04 (2019.02); B29C 48/297 (2019.02); B29C 48/345 (2019.02); B30B 11/221 (2013.01); C05G 5/12 (2020.02); B29L 2031/7004 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of making a fertilizer seed core, the method comprising:
supplying a fertilizer component, a liquid component, a binder and a filler to a zoned extruder comprising a die head, a screw, and at least three zones;
supplying the fertilizer component and the binder to the extruder and supplying the liquid component to the extruder following the fertilizer component and the binder;
mixing the fertilizer component, the liquid component, the binder and the filler to yield a thixotropic mixture comprising equal distribution of the fertilizer component, the liquid component, the binder and the filler; and
passing the thixotropic mixture through the die head, wherein the die head comprises openings 0.5 to 4 millimeter in diameter and wherein either one or both of the end of the screw is 1-15 millimeters from the die head and/or the extrusion process has a residence time of 5 to 15 minutes.