Abstract:
A porous material comprises oxides of silicon and aluminum and is substantially free of X-ray diffraction peaks in its calcined form. The material is characterized by the following properties: (a) a Bronsted acid site density as measured by temperature programmed ammonia adsorption of at least 0.005 mmol/g; (b) an alpha value of at least 0.5; (c) a specific surface area of about 50 to about 160 m2 g−1; (d) a total pore volume of about 0.14 to about 1.0 cm3 g−1; and (d) a micropore volume of about 0.001 to about 0.015 cm3 g−1.
Abstract translation:多孔材料包括硅和铝的氧化物,并且其煅烧形式基本上不含X射线衍射峰。 该材料的特征在于以下性质:(a)通过温度程序氨吸附测定的布朗斯台德酸位点密度为至少0.005mmol / g; (b)α值至少为0.5; (c)约50至约160m2 g-1的比表面积; (d)总孔体积为约0.14至约1.0cm 3 g -1; 和(d)约0.001至约0.015cm 3 g -1的微孔体积。
Abstract:
The present invention is a method to determine catalyst structures by correlating experimental conditions and directing agent characteristics to catalyst products. The correlating step is carried out by a performance model such as a neural net.
Abstract:
This invention relates to a new form of crystalline material identified as having the structure of ZSM-23, to a new and useful method for synthesizing said crystalline material and to use of said crystalline material prepared in accordance herewith as a catalyst for organic compound, e.g., hydrocarbon compound, conversion.
Abstract:
This invention relates to a method for synthesizing ultra-large pore crystalline material which can be used as a sorbent or catalyst component for conversion of organic and inorganic compounds. A dialkoxyaluminoxytrialkoxysilane is added to the reaction mixture as a metal oxide source.
Abstract:
(Branched alkyl)-polyethoxyalkyl sulfonates, and similar compounds wherein the alkyl sulfonate moiety is replaced by a sulfate moiety, having an aromatic group on one of the branches of the branched alkyl group are provided. These compounds are surfactants which are particularly useful for chemical waterflooding, especially in high brine environments.
Abstract:
There are provided alkyl sulfonate salts derived from polyvinyl alcohols which are viscosifiers, e.g., for enhanced oil recovery fluids and for use in drilling fluids.
Abstract:
There are provided alkyl sulfonate salts derived from polyvinyl alcohols which are viscosifiers, e.g., for enhanced oil recovery fluids and for use in drilling fluids.
Abstract:
The method for determining flow patterns within a subterranean formation penetrated by a spaced apart injection system and production system that comprises injecting into the formation at a predetermined depth from the injection system a solution containing a small amount of one or more water-soluble tracer compounds, recovering said tracer in the production system, determining the depth of recovery, and identifying said tracer compounds by gas chromatography and flame ionization detector; said tracer compounds being water-soluble organic compounds having phosphorus, nitrogen, or sulfur in the molecule.
Abstract:
Lubricant compositions are provided containing antiwear improving amounts of a bis-oxazoline having an alkyl group containing from about 4 to about 24 carbon atoms.
Abstract:
Aryl phosphonates of high purity, prepared by heating the corresponding aryl di-t-alkyl phosphite in the presence of a heterogeneous acidic reticular resin catalyst, are incorporated into various lubricant compositions to provide such compositions with improved antiwear properties.