Method for manufacturing an ammonium phosphate fertilizer having low cadmium content

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 10947164
APP PUB NO 20180222809A1
SERIAL NO

15750053

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The invention relates to a method for manufacturing an ammonium phosphate fertilizer from a phosphoric acid aqueous solution that has less than 50% P2O5 concentration and is obtained by wet phosphate ore treatment, said phosphoric acid containing traces of cadmium, comprising the following steps:

    (a) neutralizing said phosphoric acid solution (1) with ammonia (3) up to a molar ratio N/P of between 0.1 and 0.8,(b) reacting said partially neutralized solution (4) with a sulfide source (6) so as to form a cadmium sulfide precipitate (9),(c) separating said precipitate (9) so as to obtain a refined ammoniated phosphoric acid solution (10),(d) ammoniating and granulating said refined solution (10) so as to form said fertilizer (12).

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
OCP SACASABLANCA 20200

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Khouloud, Mehdi El Jadida, MA 1 3
Kossir, Abdelaali Casablanca, MA 2 3
Samrane, Kamal Casablanca, MA 3 3

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
7.5 Year Payment $3600.00 $1800.00 $900.00 Sep 16, 2028
11.5 Year Payment $7400.00 $3700.00 $1850.00 Sep 16, 2032
Fee Large entity fee small entity fee micro entity fee
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00