Water purification compositions of magnesium oxide and applications thereof

Patent metadata

Field	Value
Publication number	US-2016229707-A1
Application number	US-201615097610-A
Country	US
Kind code	A1
Filing date	Apr 13, 2016
Priority date	Sep 26, 2011
Publication date	Aug 11, 2016
Grant date	—

Abstract

The present disclosure provides a composition for purifying water comprising a magnesium oxide component and a binder. The magnesium oxide component includes magnesium oxide, a pH regulator, and an additional water purifying material. The binder can be an organic polymer, an inorganic binder, or a combination of both.

First claim

1 . A water purification composition comprising a magnesium oxide component and a binder selected from the group consisting of a polymeric binder, calcium aluminum silicate, and combinations of these.

2 . The composition of claim 1 , wherein the magnesium oxide component comprises MgO in an amount of from about 80% to about 90% by weight.

3 . A method of forming a granular water purification composition for use in water purification comprising:
(a) forming a mixture comprising a magnesium oxide component and an inorganic binder in an amount of from about 1% to about 15% by weight of the mixture, said mixture being substantially free of organic solvent; and (b) forming granules from said mixture.

4 . The method of claim 1 wherein said mixture further comprises water and wherein said forming step comprises forming substantially uniform slurry from said mixture and drying said slurry.

5 . The method of claim 4 wherein said inorganic binder comprises an aluminum silicate.

6 . The method of claim 5 wherein the aluminum silicate comprises sodium, magnesium, and/or barium aluminum silicates.

7 . The method of claim 6 wherein the magnesium oxide component comprises MgO in an amount of about 40% to about 90% by weight.

8 . The method of claim 7 wherein the magnesium oxide component further comprises a pH regulator in an amount of about 8% to about 20% by weight.

9 . The method of claim 8 wherein the pH regulator comprises CaCO 3 .

10 . The method of claim 5 wherein said magnesium oxide component further comprises about 30% to about 50% by weight of a water purifying material selected from the group consisting of Fe 2 O 3 , TiO 2 , MgAl 2 O 4 , and combinations of two or more of these.

11 . The composition of claim 10 wherein said one or more aluminum silicates comprises sodium, magnesium, and/or barium aluminum silicates.

Assignees

• Honeywell Int Inc

Inventors

• Raghurama Raju
• Mutukuri Srinivas S N
• Srivastava Abhilasha
• Kumbarageri Reddappa Reddy
• Banavali Rajiv
• Fooken Michael

Classifications

• B01J20/28004

  Sorbent size or size distribution, e.g. particle size · CPC title

• B01J2220/62

  In a cartridge · CPC title

• C02F2101/103

  Arsenic compounds · CPC title

• B01J20/3028

  Granulating, agglomerating or aggregating · CPC title

• C02F1/66

  by neutralisation; pH adjustment (for degassing C02F1/20; using ion-exchange C02F1/42; for flocculation or precipitation of suspended impurities C02F1/52; for removing dissolved compounds C02F1/58) · CPC title