Abstract: The present invention relates to modified glass fiber membranes which exhibit sufficient hydrophilicity and sufficient electropositivity to bind DNA from a suspension containing DNA and permit elution of the DNA from the membrane. Generally, the hydrophilic and electropositive characteristics are expressed at the surface of the modified glass fiber membrane. Preferred modified glass fiber membranes of the present invention include glass fiber membranes that have been modified by treatment with trifluoroacetic acid (TFA), BCl.sub.3, SiCl.sub.4, NaOH, F.sup.-, AlCl.sub.3 alone or in combination, with or without water. The modified glass fiber membranes of the present invention are particularly useful in processes for purification of DNA from other cellular components.

Abstract: The present invention relates to modified glass fiber membranes which exhibit sufficient hydrophilicity and sufficient electropositivity to bind DNA from a suspension containing DNA and permit elution of the DNA from the membrane. Generally, the hydrophilic and electropositive characteristics are expressed at the surface of the modified glass fiber membrane. Preferred modified glass fiber membranes of the present invention include glass fiber membranes that have been modified by treatment with trifluoroacetic acid (TFA), BCl.sub.3, SiCl.sub.4, NaOH, F.sup.-, AlCl.sub.3 alone or in combination, with or without water. The modified glass fiber membranes of the present invention are particularly useful in processes for purification of DNA from other cellular components.

Abstract: The present invention relates to modified glass fiber membranes which exhibit sufficient hydrophilicity and sufficient electropositivity to bind DNA from a suspension containing DNA and permit elution of the DNA from the membrane. Generally, the hydrophilic and electropositive characteristics are expressed at the surface of the modified glass fiber membrane. Preferred modified glass fiber membranes of the present invention include glass fiber membranes that have been modified by treatment with trifluoroacetic acid (TFA), BCl.sub.3, SiCl.sub.4, NaOH, F.sup.-, AlCl.sub.3 alone or in combination, with or without water. The modified glass fiber membranes of the present invention are particularly useful in processes for purification of DNA from other cellular components.

Abstract: A supported Lewis acid catalyst system for catalyzing hydrocarbon conversion reactions including cationic polymerization, alkylation, isomerization and cracking reactions is disclosed, wherein the catalyst system comprises an inorganic oxide support having immobilized thereon a least one strong Lewis acid comprising at least one metal salt of a strong Bronsted acid wherein the metal is selected from the group consisting of aluminum, boron gallium, antimony, tantalum, niobium, yttrium, cobalt, nickel, iron, tin, zinc, magnesium barium strontium, calcium, tungsten, molybdenum and the metals of the lanthanide series and wherein the strong Bronsted acid is selected from the group consisting of mineral and organic acids stronger than 100% sulfuric acid.

Abstract: The present invention relates to modified glass fiber membranes which exhibit sufficient hydrophilicity and sufficient electropositivity to bind DNA from a suspension containing DNA and permit elution of the DNA from the membrane. Generally, the hydrophilic and electropositive characteristics are expressed at the surface of the modified glass fiber membrane. Preferred modified glass fiber membranes of the present invention include glass fiber membranes that have been modified by treatment with trifluoroacetic acid (TFA), BCl.sub.3, SiCl.sub.4, NaOH, F.sup.-, AlCl.sub.3 alone or in combination, with or without water. The modified glass fiber membranes of the present invention are particularly useful in processes for purification of DNA from other cellular components.

Abstract: A method for treating a contact body for the exchange of heat or moisture comprises impregnating a contact body with waterglass and treating the impregnated body in acidic and basic environments to form a controlled pore structure.

Abstract: The present invention relates to fluorinated surfaces which exhibit sufficient hydrophilicity and sufficient electropositivity to bind DNA from a suspension containing DNA and permit elution of the DNA from the surface. Generally, the hydrophilic and electropositive characteristics are expressed at the fluorinated surface. Preferred fluorinated surfaces of the present invention include fluorinated Al(OH).sub.3, fluorinated SiO.sub.2 and fluorinated Celite. The fluorinated surfaces of the present invention are particularly useful in processes for purification of DNA from other cellular components. In these processes, a suspension of cellular components is placed in contact with the fluorinated surface, the fluorinated surface is washed to remove all cellular components other than DNA which are bound to the surface, and the bound DNA is eluted from the surface. Lower concentrations of chaotrope in the binding buffer are needed to bind DNA to the fluorinated surfaces.

Abstract: The present invention relates to modified glass fiber membranes which exhibit sufficient hydrophilicity and sufficient electropositivity to bind DNA from a suspension containing DNA and permit elution of the DNA from the membrane. Generally, the hydrophilic and electropositive characteristics are expressed at the surface of the modified glass fiber membrane. Preferred modified glass fiber membranes of the present invention include glass fiber membranes that have been modified by treatment with trifluoroacetic acid (TFA), BCl.sub.3, SiCl.sub.4, NaOH, F.sup.-, AlCl.sub.3 alone or in combination, with or without water. The modified glass fiber membranes of the present invention are particularly useful in processes for purification of DNA from other cellular components.

Abstract: Provided is an improved process for removing sulfur compounds from sulfur contaminated fluid streams by contacting such fluid streams with an absorbent composition comprising zinc oxide, silica, and molybdenum disulfide. The absorbent composition comprising zinc oxide, silica, and molybdenum disulfide is a novel composition which has the desirable properties of high sulfur loading capacity and the ability to be contacted with the hydrogen sulfide containing fluid stream for the removal of such hydrogen sulfide from said fluid stream with a minimum amount of sulfur dioxide slippage. An additional embodiment of the disclosed invention includes a method for minimizing the amount of extrusion die wear during the production of the zinc oxide based absorbent compositions. Extrusion die wear is reduced by adding a quantity of molybdenum disulfide to the zinc oxide absorbent in an amount which provides desirable lubricating properties such that extrusion die wear is reduced during the manufacture of the composition.

Abstract: An adsorbent composition containing sugar, vinegar, and diatomaceous earth is disclosed. The sugar, vinegar, and diatomaceous earth are preferably added together in about equal amounts by volume or in amounts of about 20 pounds of sugar, 2 gallons of vinegar, and 100 pounds of diatomaceous earth. The adsorbent composition has particular use in adsorbing petroleum oil from soil, water, or air and in water purification.

Abstract: Adsorbents are provided which are suitable for use in the removal of contaminants selected from the group consisting of free fatty acids, soaps, phosphorus, metal ions and color bodies. The adsorbents comprise inorganic porous supports selected from the group consisting of substantially amorphous alumina, diatomaceous earth, clays, magnesium silicates, aluminum silicates and amorphous silica, treated with a base in such a manner that at least a portion of said base is retained in at least some of the pores of the support to yield base-treated inorganic porous adsorbents. Processes for removing free fatty acids, etc., from glyceride oils using these adsorbents are also provided.

Abstract: The composition of this invention is a silicated zinc oxide that comprises a co-gelled mixture comprising zinc oxide and silica. This co-gelled mixture is used as a sorbent for removing sulfur compounds from sulfur containing fluids by contacting such fluids with the sorbent. The composition can be prepared by a silicating process wherein the compositon is manufactured by silicating zinc oxide to form a co-gelled mixture.

Abstract: A method of preparing a novel absorption composition comprising zinc oxide, silica and a fluorine-containing acid by mixing a fluorine-containing acid with zinc oxide and silica followed by an agglomeration step. The novel composition, which can be prepared by the novel method, is utilized by contacting a fluid stream with the novel composition to remove sulfur from the fluid stream. A further embodiment of the method of preparation involves utilizing a technique for spraying a fluorine-containing acid upon a zinc oxide and silica mixture while mixing the mixture by an inclined rotating disk agglomerator.

Abstract: Chromatographic materials comprising porous silica microspheres having silanol-enriched and completely silanized surfaces are disclosed. Processes for preparing the specified chromatographic material are also disclosed.

Abstract: Adsorbents comprising organic acid-treated amorphous silicas with effective average pore diameters of about 60 to about 5000 Angstroms are useful in processes for the removal of trace contaminants, specifically phospholipids and associated metal ions, from glyceride oils.

Abstract: Acid-treated amorphous silica has superior properties for the removal of phospholipids and chlorophyll from glyceride oils. The acid-treated adsorbent comprises a high surface area amorphous silica on which is supported an acid having a pK.sub.a of about 3.5 or lower.

Abstract: Chromatographic materials comprising porous silica microspheres having silanol-enriched and completely silanized surfaces are disclosed. Processes for preparing the specified chromatographic material are also disclosed.

Abstract: The porosity of a porous silica body is increased in a controlled manner by contacting the body with an effective amount of ammonium bifluoride.

Abstract: Starting from pegmatitic sand, the invention provides a method of purifying quartz sand, in which the amount of iron is reduced to less than 0.3 ppm, the amount of zircon to less than 1 ppm, and the amount of phosphor to less than 0.2 ppm. Gas nuclei are also removed. The method is carried out by washing with solution which contains at least 15% by weight of HF in water until at least 40% by weight of the quartz sand is dissolved, and washing with a solution which contains at least 20% by weight of HCl in water at a temperature from 5.degree. to 95.degree. C. for at least 30 minutes. In this method, the grains of the sand are freely suspended in an upward stream of the acid. Such quartz sand can suitably be used for the manufacture of very pure quartz glass for use in mercury discharge lamps, in glass fibers for telecommunication purposes (cladding glass), or in semiconductor arrangements.

Abstract: The present invention provides a heterogeneous catalyst based on silicon dioxide, as well as, a method for manufacturing same. The catalyst of the present invention is constructed from a porous material produced from large-surface glass bodies containing catalytically active additives by leaching with mineral acid and the additives are incorporated into the network of the glass body in the form of metal oxides insoluble in hot mineral acid. The catalyst exhibits a high active surface and is universally employable because it contains only a slight amount of undesired impurities, is highly reactive, and has a high structural stability up to about 1000.degree. C.

Abstract: Adsorbents comprising organic acid-treated amorphous silicas with effective average pore diameters of about 60 to about 5000 Angstroms are useful in processes for the removal of trace contaminants, specifically phospholipids and associated metal ions, from glyceride oils.

Abstract: An adsorbent, absorbent product can be produced from sericitic clays by removing alumina values from such clays with a mineral acid, removing oil contaminants from such clay with a solvent or solvent mixture and removing amorphous silica from them with a caustic solution. The particles of the clay are dried after treatment in these manners. They are then ready to use.

Abstract: A method for producing an aqueous silica sol is described, comprising admixing a fine silica powder having an ultimate particle size of 5 to 200 millimicrons with an aqueous medium at a pH not higher than 5 while applying ultrasonic vibrations having a frequency within the range of from 10 to 100 kilohertz to the aqueous medium to thereby disperse said silica powder in said aqueous medium and thus convert the mixture into an aqueous sol.

Abstract: 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 alkali so as to produce an alkali silicate solution which is separated from the remaining inorganic material. The latter is digested with an acid so as to remove alumina values. The particles remaining should then be washed and dried prior to being used as an adsorbent, absorbent material. The alkali silicate solution is preferably subjected to electrolysis to bleach contaminants within the solution and then treated with an acid so as to gel the silicate. After the gel is formed, the gel and the solution are neutralized. The gel is then separated and dried.