Abstract:
Gas streams containing low concentrations, e.g., under 20 vol. %, of H 2 S can be treated in a liquid phase Claus reactor under superatmospheric pressure. The use of such higher pressures aids in solubilizing the H 2 S and allows for its removal from such streams even though it is present in very dilute form.
Abstract:
A mutant strain of bacteria characterised in that it is deficient in L-serine deaminase activity is disclosed. Such may be used in the production of amino acids or precursors thereof and such a process is also disclosed. The invention offers advantages.
Abstract:
Improved magnesium phosphate fast-setting cementitious compositions containing a synergistic combination of an oxy-boron compound and hydroxycarboxylic acid, or its salt or acid derivative. These compositions form a hardened mass when water is added at ambient temperatures. The incorporation of the oxy-boron compound and hydroxycarboxylic acid, or its salt or acid derivative within these compositions retards the initial setting time, increases the early compressive strength of the resulting hardened mass by allowing a reduced amount of water to be added to the compositions and increases the final compressive strength. These compositions include a solid activator containing a P₂O₅ material, e.g. ammonium phosphate fertilizer, absorbed onto a porous material, e.g. diatomaceous earth.
Abstract:
A synergistic herbicidal composition comprising a mixture of
(a) an herbicidally effective amount of a thiolcarbamate of the formula in which X is hydrogen, chlorine or bromine; and R¹ and R² are independently selected from the group consisting of C₁-C₆ alkyl and C₅-C₇ cycloalkyl, and (b) an herbicidally effective amount of a benzonitrile of the formula wherein Y is halogen and Z is selected from the group consisting of hydrogen or halogen, or their modified hydroxy equivalents.
Abstract:
An alkyl 3-hydroxy-4-(4-hydroxyphenox y )pentanoate having the formula wherein R is an alkyl or substituted alkyl group ranging from about 1 to about 18 carbon atoms, which may be used as a herbicide intermediate, is disclosed, as is the production thereof.
Abstract:
An alkoxyphenylthio or alkoxyphenoxy pyrimidine characterised in that it corresponds to the following general formula: wherein
R, R', and R" independently represent optionally branched alkyl, haloalkyl, optionally substituted cycloalkyl and alkenyl, wherein the alkyl or alkenyl groups contain from one to ten carbon atoms and may be interrupted by oxygen or sulfur; and W represents oxygen or sulfur is disclosed. Such compounds are herbicidal and may be used, optionally as compositions with inert diluent carriers, in methods for controlling undesirable weed pests.
Abstract:
A rust preventive composition effective in protecting metal surfaces by direct or vapor phase contact contains as essential ingredients: (A) an aryl phosphate; (B) a polyolester; (C) a calcium petroleum sulfonate; and (D) an alkylamine alkanol.
Abstract:
Racemates of optically active amino acids substituted at the carbonyl position wherein the alpha amino acid nitrogen is underivatized can be resolved using a two phase solvent system wherein the racemate is dissolved in a substantially water immiscible organic material which is a solvent for said amino acid racemate but not for the corresponding amino acids and in water to form an aqueous phase wherein the racemate dissolved in an aqueous phase, is in equilibrium with the racemate in the organic phase; selectively hydrolyzing one of the optical isomers of the amino acid racemate in the aqueous phase to the corresponding amino acid; and recovering the amino acid. The preferred product is L-phenylalanine.