US 12,378,167 B2 · NPK liquid and solid fertilizer, obtaining process, fertilizing compositions and use

Abstract

A process of chemical cleavage of leather or skins containing chromium using sodium, potassium or calcium methylates (CH3O−) or ethylates (CH3CH2O−), producing chromium hydroxide (green paste), ammonium sulfate and liquid fertilizer. The chromium trioxide III (Cr2O3) obtained was used in the production of Fe—Cr alloy. The liquid fertilizer was applied to strawberry, violet and acerola crops, and can be applied to other types of crops. The fertilizer is also compatible with pesticides, being able to compose a composition containing fertilizer and pesticide or even used to obtain products containing fertilizers and pesticides, which allow application in a single step, exempting the process in the field A solid NPK fertilizer formulation obtained by combining N recovered from waste and homogeneously mixed with K and P salts.

Claims6

Dependent claims

A process for producing a fertilizer comprising:

a) preparing a methoxide or ethoxide solution, in a concentration range between 0.01 and 1 mol/L;
b) heating the solution obtained in step a) between 5° and 100° C.;
c) adding wet blue leather or skin in a wet blue leather or skin/methoxide or ethoxide/water ratio between 0.1:0.05:0.1 and 1:0.1:1 to obtain a product;
d) submitting the product obtained in step c) to a cleavage reaction for 30 to 60 minutes to obtain a dense liquid fertilizer, ammonia, and chromium trioxide;
e) submitting the ammonia obtained in step d) to a neutralization reaction using nitric or sulfuric or phosphoric acid at a concentration of 1 to 5 mol/L to obtain ammonium sulfate.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/766,459Filed 28 Aug 2020

Priority

BR 10201902097044 Oct 2019

Published

US 2024/0101490 A128 Mar 2024

Granted

5 Aug 2025

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

C05F 1/005
Fertilisers made from animal corpses, or parts thereof: from meat-wastes or from other wastes of animal origin, e.g. skins, hair, hoofs, feathers,…
C05C 3/00
Fertilisers containing other salts of ammonia or ammonia itself
C05F 17/60
Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation: heating or cooling during…
C14C 3/32
Tanning; Compositions for tanning: recovering tanning agents from leather

NPK liquid and solid fertilizer, obtaining process, fertilizing compositions and use

Life of this patent

NPK liquid and solid fertilizer, obtaining process, fertilizing compositions and use

Life of this patent

Abstract

Claims6