Louis P Irwin

US Patent:

7563378, Jul 21, 2009

Filed:

Apr 9, 2008

Appl. No.:

12/099843

Inventors:

Louis Irwin - Mulberry FL, US

Assignee:

Arr-Max Products, LP - Mulberry FL

International Classification:

B01D 37/02

US Classification:

210778, 210727, 210734, 4233211

Abstract:

A process to improve the polymeric filtration aid performance used in removal of gypsum from phosphoric acid/gypsum slurry. A synergistic effect has been observed by using a Dual Injection method. This method more specifically involves using two polymers (A & B) of different chemistry and injecting into slurry at a different time. The polymer chemistry of filtration aid A is selected from the group consisting of non-ionic, and anionic polymers and the polymer chemistry of filtration aid B is selected from the group consisting of sulfonated polymers. The polymer (A & B) usage is reduced by around 50% and performance improved.

US Patent:

8182698, May 22, 2012

Filed:

Jun 30, 2010

Appl. No.:

12/828061

Inventors:

Louis Irwin - Mulberry FL, US

Assignee:

ARR-MAZ Custom Chemicals, Inc. - Mulberry FL

International Classification:

B01D 21/01
B01D 21/00
B01D 37/02
B03D 3/00
C02F 1/52
C02F 1/00

US Classification:

210727

Abstract:

A chemical process to improve the filtration performance for the removal of gypsum from phosphoric acid/gypsum slurry using a filtration aid that is selected from a class of polymers, lower molecular weight anionic polyelectrolytes, which previously have not been used for this application. The polymer is CMC or Carboxymethyl Cellulose, which is a polymerized cellulose ether. CMC is found to be extremely effective for phosphoric acid/gypsum slurry that was produced from igneous phosphate rock. CMC is also available in food grade, which is novel for filtration aids for the production of phosphoric acid which may be used for human or animal feed.

US Patent:

20070102368, May 10, 2007

Filed:

Nov 8, 2005

Appl. No.:

11/269357

Inventors:

Louis Irwin - Winter Haven FL, US

Assignee:

ARR-MAZ Products, L.P. - Winter Haven FL

International Classification:

B01D 37/02

US Classification:

210728000, 210778000

Abstract:

A process to improve the polymeric filtration aid performance used in removal of gypsum from phosphoric acid/gypsum slurry. A synergistic effect has been observed by using a Dual Injection method. This method more specifically involves using two polymers (A & B) of different chemistry and injecting into slurry at a different time. The polymer chemistry of filtration aid A is selected from the group consisting of non-ionic, anionic, and cationic polymers and the polymer chemistry of filtration aid B is selected from the group consisting of sulfonated polymers. The polymer (A & B) usage is reduced by around 50% and performance improved.