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Class Information
Number: 502/82
Name: Catalyst, solid sorbent, or support therefor: product or process of making > Zeolite or clay, including gallium analogs > Clay > Acid treating > Plural acid treatment
Description: Process in which the clay is treated with a second acid or product of such process.

Patents under this class:

Patent Number Title Of Patent Date Issued
7579299 Semi-synthetic bleaching earth Aug. 25, 2009
6660172 Precoat filtration media and methods of making and using Dec. 9, 2003
6316647 Cation-exchanged clay mineral, packing material for chromatography using the same and method of producing the same Nov. 13, 2001
5958818 Alkaline phosphate-activated clay/zeolite catalysts Sep. 28, 1999
5955049 Mesopore material and method for producing the same Sep. 21, 1999
5639492 Method and composition for achieving animal weight gain with mycotoxin-contaminated animal food Jun. 17, 1997
5330946 Process of acid binding fine smectite clay particles into granules Jul. 19, 1994
5260456 Process for producing itaconic anhydride Nov. 9, 1993
4753908 Method for production of microporous separating material from smectite type mineral Jun. 28, 1988
4565794 Production of silica gel and an adsorbent, absorbent product from sericitic clay Jan. 21, 1986
4529416 Gas separation kinetics in commercial pellets Jul. 16, 1985
4329257 Method of producing a catalyst from clay minerals for the hydration of olefins May. 11, 1982

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