	US 12,384,732 B2
	Fertilizers containing calcium sulfate urea and methods for producing and using the same
Mohamed Akasha M. Khaleel, Riyadh (SA); Andrew George Kells, Wilton (GB); and Saleh Nafe Al Shammari, Riyadh (SA)
Assigned to SABIC AGRI-NUTRIENTS COMPANY, Jubail (SA)
Appl. No. 17/299,406
Filed by SABIC AGRI-NUTRIENTS COMPANY, Jubail (SA)
PCT Filed Dec. 5, 2019, PCT No. PCT/IB2019/060479 § 371(c)(1), (2) Date Jun. 3, 2021, PCT Pub. No. WO2020/115698, PCT Pub. Date Jun. 11, 2020.
Claims priority of provisional application 62/776,557, filed on Dec. 7, 2018.
Prior Publication US 2022/0119320 A1, Apr. 21, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C05G 1/00 (2006.01); C05C 1/00 (2006.01); C05C 3/00 (2006.01); C05C 9/00 (2006.01); C05D 3/00 (2006.01); C05D 9/02 (2006.01)

CPC C05G 1/00 (2013.01) [C05C 1/00 (2013.01); C05C 3/00 (2013.01); C05C 9/00 (2013.01); C05D 3/00 (2013.01); C05D 9/02 (2013.01)]

20 Claims

1. A fertilizer composition comprising a calcium sulfate urea adduct and a urea free nitrogenous fertilizer, wherein the composition comprises 23 wt. % to 26 wt. % elemental nitrogen, 9 wt. % to 11 wt. % elemental calcium, and 6 wt. % to 11 wt. % elemental sulfur, and wherein at least 50 wt. % of urea in the composition is comprised in the calcium sulfate urea adduct.

13. A method of making the fertilizer composition of claim 1, the method comprising:

(a) forming and/or obtaining a calcium sulfate urea adduct and combining the formed and/or obtained adduct with a urea free nitrogenous fertilizer to obtain the fertilizer composition; or

(b) forming a calcium sulfate urea adduct from a mixture comprising urea, CaSO₄, water, and a urea free nitrogenous fertilizer to obtain the fertilizer composition.

20. A method of fertilizing, the method comprising applying the fertilizer composition of claim 1 to a portion of a soil, a crop, or the soil and the crop.