Class 502/233 - Forming silica gel

Subclass of Class 502 - Catalyst, solid sorbent, or support therefor: product or process of making
Definition: Process in which an amorphous form of hydrate silica is
No. of patents: 103
Last issue date: 07/13/2010

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Number	Title	Issue Date
5346875	Method of manufacturing fluid catalytic cracking catalyst This invention is to a method of manufacturing fluid catalytic cracking catalyst. In particular, the invention is to a method of manufacturing a catalytic cracking catalyst which incorporates a step of matching the isoelectric point of each component of t...	09/13/1994
5308533	Aerogel mesh getter A porous light-weight getter which collects particulate and molecular contaminates that is believed a significant improvement over the prior art is provided in which a metal mesh matrix is coated with a low-density porous aerogel. In the prior art bare me...	05/03/1994
5275796	Method for producing metal oxide aerogels having densities less than 0.02 g/cc A two-step method is described for making transparent aerogels which have a density of less than 0.003 g/cm3 to those with a density of more than 0.8 g/cm3, by a sol/gel process and supercritical extraction. Condensed metal oxide int...	01/04/1994
5270027	Process of preparing high-porosity silica xerogels using alkanolamines The invention relates to high-porosity silica xerogels and a process for their preparation consisting of subjecting silica alcogels to thermal treatment in the presence of organic compounds containing amino and hydroxyl groups. The xerogels are characteri...	12/14/1993
5231066	Bimodal silica gel, its preparation and use as a catalyst support A bimodal silica gel particle, its method of preparation and its use as a catalyst support in the polymerization of olefins is disclosed. The bimodal silica gel particle exhibits a bimodal pore radius distribution, wherein the silica gel particle has a fi...	07/27/1993
5229096	Silica gel The subject invention is a new type of silica gel and process for producing the same. The silica gel is the product of gelling alkali metal silicate with excess acid in aqueous medium containing a minute amount a polymerization modifier. The modifier and ...	07/20/1993
5227239	Production of hollow aerogel microspheres A method is described for making hollow aerogel microspheres of 800-1200 μ diameter and 100-300 μ wall thickness by forming hollow alcogel microspheres during the sol/gel process in a catalytic atmosphere and capturing them on a foam surface containing ...	07/13/1993
5135901	A catalyst composition comprising rhodium, ruthenium,and a promoter A catalyst used in a process for producing a ଲ-hydroxyester product or a ଲ-hydroxyaldehyde product from ethylene oxide, carbon monoxide, and, optionally, hydrogen, is disclosed. This process uses, as a catalyst, a catalyst comprising rhodium, ...	08/04/1992
4975405	Hydrated silica gel for stabilization treatment of beer There is provided by this invention a finely divided hydrated silica gel which has a specific surface area of 530 -720 m2 /g, preferably 550-650 m2 /g, a pore volume of 0.9-1.5 ml/g, preferably 1.0-1.4 ml/g, a mean pore diameter of 5...	12/04/1990
4894357	Process for adjusting the structural and/or surface character of oxides A process for adjusting at least one of the structural and surface characteristics of an oxide material, e.g. SiO2 or Al2 O3, by dehydration of a water-containing oxide gel under supercritical conditions by extracting the ...	01/16/1990
4849378	Ultraporous gel monoliths having predetermined pore sizes and their production A method of fabricating an ultraporous SiO2 containing gel monoliths having a predetermined mean pore size with narrow distribution of the size of the pores around the mean. A SiO2 containing sol is prepared while simultaneously cont...	07/18/1989
4717708	Inorganic oxide aerogels and their preparation The invention is directed to inorganic oxide aerogels and the method of preparing such inorganic oxide aerogels which are characterized by high surface areas and high pore volume. The preparation comprises dissolving the inorganic alkoxide or metal salt i...	01/05/1988
4619908	Non-aged inorganic oxide-containing aerogels and their preparation The invention is directed to inorganic oxide-containing aerogels and the method of preparing such oxide-containing aerogels which are characterized by high surface areas and high pore volume. The preparation comprises dissolving the inorganic alkoxide or ...	10/28/1986
4565794	Production of silica gel and an adsorbent, absorbent product from sericitic clay Sericitic clays can be treated so as to produce silica gel and an adsorbent, absorbent product capable of being utilized in many different applications. In treating such clays to produce such products, finely ground clay particles are digested with an alk...	01/21/1986
4537866	Method of preparing silicate composition A method of preparing a silica-containing composition from a lithium silicate sol is disclosed. The compositions are prepared by heating shaped particles of lithium silicate sol to a temperature of about 70° C. or more in the absence of a gelling agent a...	08/27/1985
4529504	Removal of nitrogenous compounds from petroleum processing products using chlorosilylated silica gel A process is described for removing both high polar and neutral nitrogen compounds from petroleum processing liquid products and petroleum distillate fractions. According to the novel feature, a chlorosilylated silica gel is used as adsorbent for the nitr...	07/16/1985
4504595	Fluorinated silica catalyst and preparation of aromatic/aliphatic nitriles in the presence thereof An improved fluorinated siliceous catalyst, well adapted for the catalytic synthesis of aromatic/aliphatic nitriles from their corresponding formamides, formanilides or amides, is comprised of a plurality of silica particulates, the specific surface of wh...	03/12/1985
4436883	Polymerization using a support formed by heating silica gel in inert atmosphere A silica hydrogel is contacted with a hydroxy-containing organic compound which is not completely miscible with water but which is sufficiently miscible with water so as to remove water, and thereafter the organic compound is removed by heating in an iner...	03/13/1984
4436882	Polymerization process utilizing a catalyst prepared by aging of a chromium-containing gel at high pH A silica hydrogel containing chromium is aged under conditions such that at least a portion of the aging is carried out at a pH within the range of 7 to 9. The resulting hydrogel is converted to a xerogel by treating with a volatile organic liquid. The de...	03/13/1984
4414137	Catalytically active amorphous silica Catalytically active amorphous silicas are prepared by dehydrating a silica hydrogel or precipitate prepared from an acidified aqueous silicate solution containing an amine of pKa above 10 or a cation containing either a nitrogen or phosphorus ...	11/08/1983
4384086	Large pore volume olefin polymerization catalysts Large pore volume (ࣙ1.4 cc/g) silica is obtained by slowly drying an acidic (pH ࣘ3.5) silica hydrogel. The gel is useful in connection with chromium as an ethylene polymerization catalyst....	05/17/1983
4382070	Process for producing xerogel of silicic acid with high volume of pores The product of this invention can be applied as a column packing for high performance liquid chromatography. This material is further useful as a catalyst carrier, as a sorbent for selective concentrating diluted compounds for analytical purposes, and for...	05/03/1983
3975293	Bodies of siliceous gels having large pores and process for preparing same This invention is directed to: (1) a process for increasing the pore diameter of siliceous gels without decreasing the pore volume in which a siliceous hydrogel is dried at a temperature of up to 500°, C, to produce a siliceous gel having an average pore...	08/17/1976

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Class 502/233 - Forming silica gel