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Silica gel obtained by metathesis reaction of liquid sodium silicate with acid differs depending on the production conditions, so it is absorbed in high humidity environment, and in the low humidity environment, alkali maturation, heat treatment process, impregnation process, It is a method for producing a silica gel for humidity control through a drying process.
The method comprises of placing the palm side of a glove mold facing up, and raising the fingers portion of glove mold up, in such a way that the glove mold is tilting up at 15#176;45#176; in relative to horizontal position. The first pouring process is carried out by pouring silica gel liquid on the fingers portion of glove mold. Then adjust the glove mold to horizontal position, and rotate the
There is proposed a silica gel for preventing the generation of haze in beer, a method of manufacturing the silica gel and a method of stabilization treatment of beer. The silica gel is provided with a specific surface area of m2/g, a pore volume of ml/g and a average pore diameter of 610 nm, and has a relatively high adsorbability per unit weight.
the patent EP B1, wherein rice husks are thermally treated at 700#176; C. until obtaining an ash, which is possibly prewashed with sulfuric acid; the ash is treated with NaOH, thus obtaining a sodium silicate sol, to which sulfuric acid is added, and after aging of the gel, it is washed with water to remove the resulting Na 2 SO 4 salt; finally, the water in the gel is exchanged
A method of making an alumina silica gel comprising playing separate streams of an alkali metal silicate and aluminum sulphate and an alkali metal compound more strongly alkaline than the silicate solution onto substantially the same spot on a substantially horizontal rotating surface, and collecting the reaction product discharged from the rotating surface by centrifugal force.
A method of a fabricating silica glass by solgel process is provided. The method includes mixing silica, a binder, a dispersing agent and a gelling agent, and forming a sol without air bubbles; injecting the sol into a mold, the injection of the sol into the mold being controlled by the pressure of an inert gas; gelating the sol injected into the mold and demolding the gel; and drying the
Abstract: This invention provides a method for manufacturing silica gels in a form of scales or needles having a pore volume and a specific surface area being relatively large and being controlled. Silicic acid sol is frozen, crystallized and deposited in gaps among crystal faces of crystals of solvent of the sol, thus obtaining the frozen silica hydrogels in the form of scales or needles.
Dentifrice compositions containing a hydrous silica gel having a water content of from about 20 to about 60 weight percent are disclosed. The abrasiveness of the gel is increased by contacting the gel with an alkaline medium to provide a gel pH of about 6 to about 10 and/or preparing the gel by drying and grinding a silica hydrogel that has been washed with an aqueous acidic solution having a
The invention discloses a heatconducting silica gel sheet and a manufacturing method thereof. The heatconducting silica gel sheet is a sheet shaped body which is formed by mixing and mouldpressing the following components in parts by weight: 1050 parts of polysiloxane, 20600 parts of heatconducting powder, parts of surface modifier, parts of crosslinking agent, part
New silica gel materials and novel methods of producing such are provided. The method itself entails a manner of mixing the reactants together in a onepot process such that the time required for aging is reduced without compromising the ability to target pore size production. In such a way, the pH of the reaction drives pore size development, thereby permitting a more efficient process to be
A method of producing a silica gel material comprising the sequential process steps of a) initially producing a silicic acid sol through alkali metal silicate addition to a mineral acid at a target pH level of between and ; b) diluting said silicic acid sol in a hot water medium at a temperature of from 65 to 100#176; C., thereby solidifying said sol into a polysilicic acid gel; c) aging
Patent application title: Silica gel manufacturing method and gels made thereby Inventors: DuenWu Hua (Edgewood, MD, US) Michael C. Withiam (Landenberg, PA, US) Francis R. W. Godwin (Bel Air, MD, US) Fitzgerald A. Sinclair (Bear, DE, US) IPC8 Class: AC01B33158FI USPC Class: 423338 Class name: Oxygen containing silica by gelling Publication date:
Method of making silica containing gels . United States Patent US Patent References: : Cracking with synthetic gel catalysts: : : Reaction of solutions: In the case of manufacturing 11 to .13% aluminasilica gel,
The method comprises of placing the palm side of a glove mold facing up, and raising the fingers portion of glove mold up, in such a way that the glove mold is tilting up at 15#176;45#176; in relative to horizontal position. The first pouring process is carried out by pouring silica gel liquid on the fingers portion of glove mold. Then adjust the glove mold to horizontal position, and rotate the
The ideal situation is to have one general method of synthesis by which these and other silica gels can be produced. The present invention to a high degree accomplishes this. This process produces a silica gel having a pore volume which can be set at any value about to cc/g by a known adjustment of reaction parameters.
Discuss; colloidal systems Substances title claims abstract description 51; VYPSYNLAJGMNEJUHFFFAOYSAN silicium dioxide Chemical compound data:image/svg+xml;ba
1. A method of producing a silica gel, which comprises: hydrolyzing a silicon alkoxide, thereby forming a hydrogel; and subjecting the hydrogel to a hydrothermal treatment substantially without aging the hydrogel, thereby producing said silica gel having the following characteristics: (a) a pore volume ranging from 0 6 to ml/g, (b) a specific surface area ranging from 300 to 900 m 2 /g, (c
United States Patent For this purpose I may simply acidify water glass with sufuric acid in the well known manner employed in manufacturing silica gel of commerce. The gel is A method of treating gels containing substantial amounts of liquids of low solvent capacity for the gel substance dispersed therein which comprises
A fertilizer especially suitable for gramineous plants which has a high supplying ability and a high absorption/availability efficiency of silicic acid and a method for using the same. Silica gel was applied to a test field of paddy rice by 50 g/m2. The silicic acid content in stalks and leaves of paddy rice became extremely high compared with a case where a conventional silicic acid
Methods of production and use, as well as the novel gel materials themselves, particularly caustic and composite gels, are thus encompassed within this invention. WOA8 Silica gel manufacturing method and gels made thereby Google Patents
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