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Title: Nitride-based controlled-release fertilizers and process for making same

Patent ·
OSTI ID:1460562
;

A controlled-release solid nitride fertilizer from fly ash and a method for making are described. The fertilizer includes a nitrogen source including at least one solid nitride combined with at least one precipitation-inhibiting agent and with at least one moisture-retention agent, all compressed together to form a porous release structure that in contact with water releases ammonium ions as a nitrogen nutrient at a substantially uniform release rate over a selected release period and thereby maximizes nitrogen-use efficiency by plants.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
Assignee:
BATTELLE MEMORIAL INSTITUTE (Richland, WA)
Patent Number(s):
10,005,699
Application Number:
15/222,632
OSTI ID:
1460562
Resource Relation:
Patent File Date: 2016 Jul 28
Country of Publication:
United States
Language:
English

References (14)

Artificial Fertilizer patent May 1900
Process of Making Phosphorus Nitride patent May 1929
Manufacture of Fertilizer patent January 1933
Method for aqueous processing of AlN and compositions therefrom patent August 1993
Artificial Soil and Method of Making the Same patent-application May 2015
A non-aqueous processing route for phosphate-protection of AlN powder against hydrolysis journal January 2008
Protection of AlN powder against hydrolysis using aluminum dihydrogen phosphate journal January 2001
Reactivity of Aluminum Nitride Powder in Aqueous Silicon Nitride and Silicon Carbide Slurries journal February 2002
Ca-α/β-sialon ceramics synthesised from fly ash—preparation, characterization and properties journal May 2001
Carbonitridation of Fly Ash. I. Synthesis of SiAlON-Based Materials journal April 2005
Carbonitridation of Fly Ash. II. Effect of Decomposable Additives and Whisker Formation journal April 2005
Carbonitridation of Fly Ash. 3. Effect of Indecomposable Additives journal September 2005
Carbonitridation of Fly Ash. 4. Hydrolysis of Nitrided Fly Ash journal September 2005
Energy Estimation on CRN Process of Fly Ash as a Slow-Release Nitrogen Fertilizer journal June 2010

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