CHILL-PROOFING COMPOSITE FILTER AIR AND RELATED METHODS
A chill-proofing composite filter aid may include a filtration component and an adsorption component including precipitated silica at least partially coating the filtration component. The composite filter aid may have a pore volume of at least about 0.15 cm 3 /gram at an average pore size between 3 nanometers and 15 nanometers. A method for removing particles from a fluid may include providing a chill-proofing composite filter aid, pre-coating a filter element with the composite filter aid, and passing a fluid containing particles to be adsorbed through the coated filter element. A method of making a chill-proofing composite filter aid may include providing a filtration component, and at least partially coating the filtration component with an adsorption component including precipitated silica. The composite filter aid may have a pore volume of at least about 0.15 cm 3 /gram at an average pore size between 3 nanometers and 15 nanometers.
1 . A chill-proofing composite filter aid comprising:
a filtration component; and
an adsorption component comprising precipitated silica at least partially coating the filtration component,
wherein the composite filter aid has a pore volume of at least about 0.15 cm 3 /gram at an average pore size between 3 nanometers and 15 nanometers.
2 . The composite filter aid of claim 1 , wherein the filtration component comprises diatomaceous earth.
3 . The composite filter aid of claim 1 , wherein the composite filter aid has a pore volume of at least about 0.20 cm 3 /gram at an average pore size between 3 nanometers and 15 nanometers.
4 . (canceled)
5 . (canceled)
6 . The composite filter aid of claim 1 , wherein the composite filter aid has a pore volume of ranging from at least about 0.15 cm 3 /gram to about 0.35 cm 3 /gram at an average pore size between 3 nanometers and 15 nanometers.
7 . The composite filter aid of claim 1 , wherein the composite filter aid has a pore volume of ranging from at least about 0.20 cm 3 /gram to about 0.35 cm 3 /gram at an average pore size between 3 nanometers and 15 nanometers.
8 . The composite filter aid of claim 1 , wherein the composite filter aid has a pore volume of ranging from at least about 0.25 cm 3 /gram to about 0.35 cm 3 /gram at an average pore size between 3 nanometers and 15 nanometers.
9 . (canceled)
10 . The composite filter aid of claim 1 , wherein the average pore size of the composite filter aid is less than or equal to 15 nanometers.
11 . (canceled)
12 . (canceled)
13 . The composite filter aid of claim 1 , wherein the average pore size of the composite filter aid is between 3 nanometers to 12 nanometers.
14 . (canceled)
15 . The composite filter aid of claim 1 , wherein the average pore size of the composite filter aid is between 5 nanometers to 15 nanometers.
16 . (canceled)
17 . (canceled)
18 . The composite filter aid of claim 1 , wherein the composite filter aid exhibits a chill haze reduction of at least 25%.
19 - 21 . (canceled)
22 . The composite filter aid of claim 1 , wherein the adsorption component is precipitated in situ onto the filtration component.
23 . The composite filter aid of claim 1 , wherein the composite filter aid has a BET surface area of at least 50 m 2 /gram.
24 . The composite filter aid of claim 1 , wherein the composite filter aid has a BET surface area ranging from at least 50 m 2 /gram to 500 m 2 /gram.
25 . (canceled)
26 . The composite filter aid of claim 1 , wherein the precipitated silica comprises silica gel.
27 . A method for removing particles from a fluid, the method comprising:
providing a chill-proofing composite filter aid comprising
a filtration component, and
an adsorption component comprising precipitated silica at least partially coating the filtration component,
wherein the composite filter aid has a pore volume of at least about 0.15 cm 3 /gram at an average pore size between 3 nanometers and 15 nanometers;
pre-coating a filter element with the composite filter aid; and
passing a fluid containing particles to be adsorbed through the coated filter element.
28 . The method of claim 27 , wherein the fluid includes beer.
29 . The method of claim 27 , wherein the filtration component comprises diatomaceous earth.
30 . A method of making a chill-proofing composite filter aid, the method comprising:
providing a filtration component;
at least partially coating the filtration component with an adsorption component comprising precipitated silica,
wherein the composite filter aid has a pore volume of at least about 0.15 cm 3 /gram at an average pore size between 3 nanometers and 15 nanometers.
31 . The method of claim 30 , wherein the at least partially coating the filtration component with precipitated silica comprises precipitating the silica in situ onto the filtration component.
32 . The method of claim 30 , wherein the filtration component comprises diatomaceous earth.