Free radical post-crosslinked adsorbent and method of...

Details Free radical post-crosslinked adsorbent and method of... Free radical post-crosslinked adsorbent and method of...

2009-06-10

2011-12-13

Zemel, Irina S (Department: 1765)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S131000, C521S142000, C521S146000, C502S402000

Reexamination Certificate

active

08076384

ABSTRACT:
A post-crosslinked adsorbent comprises: monomer units of (a) at least 55 wt % at least one polyvinylaromatic monomer and (b) up to 45 wt % at least one monovinylaromatic monomer; and 0.5-2.5 mmol/g pendent vinyl groups; wherein the dry adsorbent has BET specific surface area in the range of about 650-1000 m2/g, BET average pore diameter 7.2-10 nm, BET porosity 1.29-2.45 mL/g, BJH adsorption micropore volume was less than 20% of total BJH adsorption pore volume, and HK micropore volume was less than 21% of total BJH adsorption pore volume. The invention is also directed to a preparation method for the polymeric adsorbent.

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Zhou et al., “Postcrosslinking of Macrolporous Styrene-Divinylbenzene Copolymers via Pendant Vinyl Groups: Effect of the Starting Copolymers on the Pore Structure of the Postcrosslinked Product”, J. Appl. Polym. Schi., vol. 83, 1668-77, 2002, (hereinafter “Zhou”).

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