Abstract: This marking plate, which can be a license plate or a signage plate, comprises at least one base plate and symbols obtained by stamping the marking plate. The base plate is composed of a composite material containing a matrix and a fiber reinforcement comprising natural fibers.

Abstract: Chemical grade silicon metalloid having improved performance in the direct process for making organohalosilanes is selected by (A) measuring the temperature of each batch of silicon metalloid during both the refining and the casting of the silicon metalloid; (B) measuring the elemental impurity levels in each batch of the silicon metalloid after refining of the silicon metalloid; (C) predicting the properties of the slag phase produced during refining of the silicon metalloid based on equilibrium calculations using the elemental impurity levels and the measured temperatures of each batch of silicon metalloid; and (D) selecting a chemical grade silicon metalloid for use in the direct process for making organohalosilanes based upon the predicted slag properties; such that the slag density, the viscosity, and the melting point of the slag, are within acceptable and predetermined ranges for each individual batch.

Abstract: Chemical grade silicon metalloid having improved performance in the direct process for making organohalosilanes is selected by (A) measuring the temperature of each batch of silicon metalloid during both the refing and the casting of the silicon metalloid; (B) measuring the elemental impurity levels in each batch of the silicon metalloid after refining of the silicon metalloid; (C) predicting the properties of the slag phase produced during refining of the silicon metalloid, based on equilibrium calculations, using the elemental impurity levels and the measured temperatures of each batch of silicon metalloid; and (D) selecting a chemical grade silicon metalloid for use in the direct process for making organohalsilanes, based upon the predicted slag properties; such that the slag density, the viscosity, and the melting point of the slag, are within acceptable and predetermined ranges for each individual batch.

Abstract: A process for the use of water granulated silicon in the preparation of alkylhalosilanes. The process comprises contacting an alkyl halide described by formula RX, with a particulate water granulated silicon containing greater than 0.5 to about 5.0 weight percent iron, in the presence of a catalyst composition comprising copper, at a temperature within a range of about 250.degree. C. to 350.degree. C. where R is selected from the group consisting of alkyls comprising one to about four carbon atoms and X is a halogen.

Abstract: Catalysts for the preparation of unsaturated nitriles by the ammoxidation of olefins, the catalysts comprising a combination of the oxides of antimony, tin, zirconium, copper, and tungsten having the general formula:Sb.sub.a Sn.sub.b Zr.sub.c Cu.sub.d W.sub.e O.sub.fwhere a is from 1 to 10, b is from 1 to 10, c is 1, d is from 0.01 to 5, e is from 0.01 to 0.05, and f is the number of oxygen atoms in the oxidized combination with the metallic elements, together with processes for the preparation of nitriles by olefin ammoxidation, particularly acrylonitrile produced by ammoxidizing propylene, using such catalysts.

Abstract: Catalysts for the preparation of unsaturated nitriles by the ammoxidation of olefins, such catalysts being oxides of antimony and of tin together with one or more polyvalent metal oxides and one or more monovalent metal compositions of the general formulaSb.sub.a Sn.sub.b (Me.sub.c).sub.m (A.sub.d).sub.n O.sub.e (I)wherein Me represents a polyvalent metal and A a monovalent metal; a is from one to ten, b is from one to ten, c is from 0.01 to five, and d is from 0.01 to five; m and n are integers equal to or greater than one; and e is the number of oxygen atoms combined with the metallic elements, together with processes for preparing nitriles by ammoxidation of olefins, especially acrylonitrile from propylene, utilizing such ammoxidation catalysts.

Abstract: Catalysts for the preparation of unsaturated nitriles by the ammoxidation of olefins, the catalysts comprising oxides of antimony, tin, tungsten, and copper having the general formulaSb.sub.a Sn.sub.b W.sub.c Cu.sub.d O.sub.e (I)wherein a is from one to ten, b is from one to ten, c is from 0.01 to 5, d is from 0.01 to 5, and e is the number of oxygen atoms in combination with the metallic elements of formula (I), together with processes for preparing unsaturated nitriles by olefin ammoxidation, and particularly for preparing acrylonitrile from propylene, utilizing such catalysts.