Abstract: An extruded nickel oxide on refractory oxide hydrogenation catalyst, having, in its reduced state, a nickel surface area greater than 30 m.sup.2 /gm of reduced nickel in the catalyst and 15 to about 65 volume percent of pores having diameters of about 300 to about 1000 angstroms, is highly active for the hydrogenation of aromatics in heavy hydrocarbon streams and is relatively resistant to sulfur poisoning.
Type:
Grant
Filed:
July 13, 1992
Date of Patent:
November 2, 1993
Assignee:
United Catalysts Inc.
Inventors:
Dinah C. Huang, Edward K. Dienes, Jon P. Wagner
Abstract: Triple derivatives of polygalactomannan i.e., dialkylaminoalkyl ether-hydroxyalkyl ether - long aliphatic chain ether of polygalactomannan, are useful as thickening agents for aqueous fluids.
Abstract: Polygalactomannans containing a hydroxybutyl ether substituent and a hydrophobic substituent can be used in the fracturing of subterranean formations.
Abstract: High solids coating compositions are made from organic solvent solutions of the reaction product of a diglycidyl ether of a dihydric phenol, vernonia oil and a dihydric phenol.
Type:
Grant
Filed:
February 10, 1992
Date of Patent:
July 13, 1993
Assignee:
Hi-Tek Polymers, Inc.
Inventors:
Jim D. Elmore, William J. DeGooyer, Mary B. Tipton, John H. Kaiser
Abstract: An SiO.sub.2 -containing copper oxide-chromium oxide catalyst is obtained through heat treatment of copper oxide and chromium oxide, or of a precursor compound convertible into copper oxide or chromium oxide in the presence of an SiO.sub.2 component; it is characterized by the fact that, after the heat treatment,(a) the intensity ratio between the X-ray diffraction lines (XRD reflexes) of the copper oxide with d=0.232 nm and of the CuCr.sub.2 O.sub.4 spinel with d=0.240 nm formed through heat treatment, determined as the ratio of the reflex amplitudes, is 0.7 to 4.0:1, and(b) the copper mass, which is dissolved by stirring 10 g of the catalyst in 100 ml of 10 weight percent acetic acid at 20.degree. C. for 2 minutes, amounts to a maximum of 200 mg.
Type:
Grant
Filed:
November 21, 1991
Date of Patent:
June 8, 1993
Assignee:
Sud-Chemie Aktiengesellschaft
Inventors:
Michael Schneider, Gerd Maletz, Karl Kochloefl
Abstract: Adhesive compositions are made from methacrylate ester monomers, elastomeric polymers having a Tg below -25.degree. C. and which are soluble in the monomers, core-shell polymers which swell in the monomers but do not dissolve therein, and free radical producing catalysts. These adhesive compositions when used in bonded assemblies exhibit a combination of high adhesive bond impact strength and high bulk tensile elongation.
Abstract: Acid-resistant copper oxide-chromium oxide catalysts for hydrogenation of fatty acids or fatty acid mixtures and/or the esters thereof are obtained through heat treatment of copper oxide and chromium oxide or of precursor compounds that are convertible into copper oxide or chromium oxide and which contain aluminum zirconium, cerium and/or lanthanum oxide as an additional metal component. The acid resistance is defined by the fact that the amount of copper which is dissolved by stirring 10 g of the catalyst for 2 minutes in 100 ml of 10 weight percent acetic acid at 20.degree. C., is a maximum of 200 mg.
Type:
Grant
Filed:
November 21, 1991
Date of Patent:
April 27, 1993
Assignee:
Sud-Chemie Aktiengesellschaft
Inventors:
Michael Schneider, Gerd Maletz, Karl Kochloefl
Abstract: Preactivated organophilic clays useful as rheological control and gelling agents for organic liquids are made by dry blending the organophilic clays with free-flowing dry powder blends of 1,2-propylene carbonate and finely divided amorphous silica.
Abstract: Molding compositions having improved flexibility are made from blends of segmented copolyester elastomers and copolymers of ethylene and ethyl acrylate.
Abstract: Water-borne coating compositions are made, using as a thickening agent, a polygalactomannan having both hydrophilic and hydrophobic substituents.
Abstract: The flavor protecting properties of interior container coating compositions are improved by the inclusion of cyclodextrins in the composition.
Abstract: Citric ester compositions wherein the ester components contain about 1.5 to about 3 hydroxyl groups per molecule are useful as pigment grinding vehicles and as reactive diluents for thermosetting coatings.
Type:
Grant
Filed:
May 13, 1991
Date of Patent:
October 20, 1992
Assignee:
Hi-Tek Polymers, Inc.
Inventors:
Jimmy D. Elmore, Elizabeth G. Zylla, George A. Roy, II
Abstract: Cyanate esters of 4,4'-[1,3-phenylenebis(1-methylethylidene)] 2,2',6,6'-R-bisphenol when properly catalyzed, can be cured at temperatures in the range of about 250.degree. to about 300.degree. F. to obtain percent cyclotrimerization of the cyanate ester groups of at least 80 percent.
Abstract: Super-absorbent polymers having superior dryness properties when incorporated into absorbent articles are made from acrylic acid and crosslinking agent polymerized under controlled conditions.
Type:
Grant
Filed:
April 15, 1991
Date of Patent:
September 8, 1992
Assignee:
Hoechst Celanese Corporation
Inventors:
Douglas R. Chambers, Hubert H. Fowler, Jr., Yoji Fujiura, Fusayoshi Masuda
Abstract: Alkyl and hydroxyalkyl ethers of polygalactomannans are further modified with long chain haloalkanoic acids. The resulting derivatized polygalactomannans are useful as thickening agents in aqueous systems, particularly in combination with surfactants at acidic pH.
Abstract: Adhesive compositions are made from methacrylate ester monomers, elastomeric polymers having a Tg below -25.degree. C. and which are soluble in the monomers, core-shell polymers which swell in the monomers but do not dissolve therein, and free radical producing catalysts. These adhesive compositions when used in bonded assemblies exhibit a combination of high adhesive bond impact strength and high bulk tensile elongation.
Abstract: Glass containing polyacetal articles are first etched in an acid bath and then treated with an organosilane or titanate to improve adhesion to the articles. Such treated articles can be more easily coated with adhesives than non-treated articles.