Abstract: In a process for separating relatively magnetic mineral particles P.sub.m having magnetic susceptibilities .chi..sub.m, with .chi..sub.m >0 from relatively non-magnetic particles P.sub.n, having magnetic susceptibilities .chi..sub.n, with .chi..sub.m >.chi..sub.n, all the particles are suspended in a liquid stream, which is supplied to a separating container. The container is provided with an inlet and an outlet and forms a passageway for the stream therebetween. Furthermore an arrangement of magnetizable matrix elements provided in the passageway is magnetized. The supplying and magnetizing are conditioned in such a way, that depositions of particles are obtained predominantly upon the downstream side of the elements. From all the particles magnetic particles P.sub.m are captured to an effective amount upon the downstream side, thereby resulting in a high grade deposition.

Abstract: A catalyst system for the polymerization of cyclic olefins, comprising(1) a tungsten compound which is obtainable by combining a tungsten halide and/or a tungsten oxyhalide with a phenol compound which is substituted with a bulky alkyl group at the positions ortho with respect to the hydroxyl group;(2) one or more compounds of the general formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 each represent an optionally substituted alkoxy group in the range of from 2 to 8 carbon atoms and preferably from 2 to 4 carbon atoms, and wherein at most one of the symbols R.sup.1, R.sup.2 and R.sup.3 may represent hydrogen or halogen and preferably chlorine, the compound of formula I being substantially free of organo-tin compounds;(3) a boron halide,and a process for in mould polymerization using such catalysts.

Abstract: The invention provides fungicidal compositions containing benzyl-tris(aryl)-phosphonium salts of the general formula ##STR1## in which R.sup.1 represents an optionally substituted alkyl or alkoxy group; R.sup.2 represents a hydrogen atom or an optionally substituted alkyl group; R.sup.3, R.sup.4 and R.sup.5 independently represent a hydrogen or halogen atom or an optionally substituted alkyl or alkoxy group; and A.sup.- represents an anion processes for the preparation of such compounds. Certain of the compounds of formula I are novel and the invention therefore also provides processes for the preparation of such compounds and their use as fungicides.

Abstract: Novel fungicidal thiazole derivatives of the general formula ##STR1## in which: R represents a hydrogen atom or a group of general formula --(CH.sub.2).sub.m --Y where m is 0 or 1 and Y represents an optionally substituted nitrogen-containing heterocycle;R.sup.1 represents a group of formula --(CH.sub.2 ).sub.p --X or --N(Z)--CO--X where p is 0, 1 or 2, Z represents a hydrogen atom or an alkyl group and X represents an optionally substituted nitrogen-containing heterocycle, and, provided R represents a group in accordance with the general formula --(CH.sub.2).sub.m --Y, may additionally represent a hydrogen atom or an optionally substituted alkyl, aryl, amino or aralkyl group;n is 0 or 1; andR.sup.2 represents an optionally substituted phenyl group; and acid addition salts, N-oxides, S-oxides and metal salt complexes thereof.

Abstract: The invention provides a fungicidal composition comprising a carrier and, as active ingredient, certain tetrahydropyrimidine derivatives of the general formula ##STR1## or an acid-addition salt or metal salt complex thereof, in which n is 0, 1, 2 or 3; R represents an optionally substituted alkyl, aryl or aralkyl group; R.sup.1 represents a hydrogen atom or an optionally substituted alkyl or aralkyl group; R.sup.2 represents an optionally substituted aryl group; p is 0 or 1; X represents a group --NR.sup.3 -- or --NR.sup.3 --NR.sup.3 -- where each R.sup.3 independently represents a hydrogen atom or an optionally substituted alkyl, aryl or aralkyl group or R.sup.1 and (X).sub.p --A--R.sup.2 together represent a group --(CR.sup.4 R.sup.5).sub.q --N(A--R.sup.2)-- where q is 2 or 3 and each of R.sup.4 and R.sup.5 is independently selected from a group consisting of hydrogen atoms and optionally substituted alkyl groups; and A represents a group --(CR.sup.6 R.sup.7).sub.

Abstract: A pesticidal organotin formulation is a water dispersible solid concentrate comprising at least one pesticidal organotin compound and polyvinylpyrrolidone. The formulation is prepared by dissolving the organotin compound and the polyvinylpyrrolidione in a solvent, followed by removal of the solvent, preferably by evaporation at a pressure below atmospheric pressure to yield the solid concentrate. The formulation may be dispersed in water, either with or without agitation, to yield an aqueous dispersion which may be applied to a locus to combat pests, especially acarids.

Abstract: This invention relates to 1-dimethylcarbamoyl-3-substituted-5-substituted-1H-1,2,4-triazoles as defined herein, compositions containing those compounds and methods of use.

Abstract: Process for the manufacture of modified polyphenylene ether or structurally related polymers, comprising the reaction of polyphenylene ether or structurally related polymer with a cyclic acid anhydride, in the presence of a non nucleophilic base, and in an inert polar organic solvent and preferably in a vinyl substituted aromatic monomer as solvent; modified polyphenylene ethers so obtained and use of them for the manufacture of modified high temperature rigid poly(vinyl substituted aromatic) polymer compositions.

Abstract: Process for the manufacture of modified polyphenyl ether or structurally related polymers comprising the reaction of said compound with a para substituted phenylsulphonyl halide, in the presence of a substituted pyridine derivative as catalyst and an acid neutralizing agent, and in a vinyl substituted aromatic monomer as solvent; modified polyphenylene ethers or structurally related polymers so obtained and use of them for the manufacture of modified high temperature rigid poly(vinyl substituted aromatic) polymer compositions.

Abstract: Compounds of the formula ##STR1## wherein X.sup.1, X.sup.2 and X.sup.3 each independently represents hydrogen, halogen or alkyl; n is 0 or 1; Z represents hydrogen or halogen or an amino, alkyl, haloalkyl, alkylthio or alkoxy group or a phenoxy group optionally substituted by haloalkyl; A represents CH or N; Y.sup.1 and ZY.sup.2 each independently represents hydrogen, halogen, alkyl, haloalkyl, alkoxy or haloalkoxy; and W represents hydrogen or, when A is CH and at least one of Y.sup.1 and Y.sup.2 is not hydrogen or when A is N, hydrogen or halogen; with the proviso that when A represents N, then each of Y.sup.1 and Y.sup.2 represents hydrogen, have herbicidal properties. The invention also provides a process for their preparation and their use as herbicides.

Abstract: A process for the preparation of a compound of general formula ##STR1## wherein X represents a cyano group, a group --COOH or a salt, ester or amido derivative thereof, R.sup.1 represents a hydrogen atom or an optionally substituted alkyl group, R.sup.2 represents an optionally substituted alkyl or phenyl group, Z represents an alkyl group or a halogen atom and n represents 0, 1, 2, 3 or 4, the process comprising reacting a compound of general formula ##STR2## with a first reactant capable of both dehydrating the amide group of said compound of general formula IV, to form a group X wherein X represents a cyano group, and reacting with the carboxy group of said compound of general formula IV to form a group with which a compound of general formula R.sup.1 R.sup.2 NH may react; subsequently reacting the resulting compound with a compound of general formula R.sup.1 R.sup.

Abstract: Compounds of formula ##STR1## wherein Z is oxygen or sulphur;R.sup.1 is hydrogen, halogen, alkyl or haloalkyl;R.sup.2 is hydrogen, or alkyl;q is 0 or 1;R.sup.3 is hydrogen, alkyl or alkenyl; the or each X independently is halogen, optionally substituted alkyl or alkoxy, alkenyloxy, alkynyloxy, cyano, carboxy, alkoxycarbonyl, (alkylthio)carbonyl, alkylcarbonyl, amido, alkylamido, nitro, alkylthio, haloalkylthio, alkenylthio, alkynylthio, alkylsulphinyl, alkylsulphonyl, alkyloximinoalkyl or alkenyloximinoalkyl;n is 0 or an integer from 1 to 5; the or each Y independently is a halogen, alkyl, nitro, cyano, haloalkyl, alkoxy or haloalkoxy; and m is 0 or an integer from 1 to 5, their preparation and use as herbicides.

Abstract: A tri-alkyl compound of a Group 3a metal is purified by a process in which a polyether of the formula ##STR1## wherein R independently is alkyl of 1 to 4 carbon atoms inclusive, each R' independently is hydrogen, methyl or ethyl; m is an integer from 1 to 6 inclusive; and n is an integer from 1 to 12 inclusive, is added to a composition comprising a tri-alkyl compound and the polyether. The adduct is heated to dissociate the adduct thermally into a mixture containing tri-alkyl compound of the Group 3a metal, and the mixture is subjected to distillation to recover the tri-alkyl compound of the Group 3a metal.

Abstract: An improved process for the mechanical separation of complex, intergrown ores containing mineral of at least one of lead or zinc comprises a differential flotation process followed by an agglomeration process. The improved separation process is useful for bulk separation of mixed, intergrown minerals or for separation of one mineral from another, e.g., separation of lead-containing mineral from zinc-containing mineral.

Abstract: An improved process for the removal of organic matter from bauxite ore containing gibbsite comprises heating the ore under roasting conditions including a roasting temperature of from about 400.degree. C. to about 600.degree. C. with oxygen-containing roasting gas having a moisture content of less than 1% by volume water until the water of crystallization of the alumina present in the treated product is less than 0.5 mole per mole of alumina.

Abstract: The invention provides compounds of general formula ##STR1## wherein m is 0 or 1; each of R.sup.1 and R.sup.2, and R.sup.3 and R.sup.4 if present, independently represents a hydrogen or halogen atom or an optionally substituted alkyl, cycloalkyl or aryl group, or R.sup.1 and R.sup.2 together or R.sup.3 and R.sup.4 together represent an optionally substituted alkylene chain; X represents a cyano group, a group --COOH or a salt, ester or amido derivative thereof; Y represents an alkyl group or a halogen atom; and n represents 0, 1, 2 or 3; a process for their preparation; compositions containing such compounds and their use as fungicides.

Abstract: The invention provides a fungicidal composition comprising at least one systemic, contact and/or soil fungicide and at least one acrylic acid morpholide derivative of the general formula ##STR1## in which R.sub.1 represents a hydrogen, chlorine or bromine atom, a trifluoromethyl, trifluoromethoxy, C.sub.3 -C.sub.7 alkyl, C.sub.3 -C.sub.5 alkoxy, C.sub.3 -C.sub.6 alkenyl, HClFC--CF.sub.2 O--, HClC.dbd.CClO--, cyclohexyl, cyclopentenyl, cyclohexenyl, phenyl, 4-chlorophenyl, 4-ethylphenyl, 4-chlorobenzyl or 4-chlorophenylthio group or a phenoxy group optionally substituted by one or more substituents selected from fluorine and chlorine atoms and methyl and ethoxycarbonyl groups and R.sub.2 represents a hydrogen atom, or R.sub.1 represents a hydrogen atom and R.sub.2 represents a 3-phenoxy group.

Abstract: Compounds of formula ##STR1## in which X is nitro;Y is hydrogen or halogen; andR is C.sub.1-6 alkyl;are useful as herbicides, especially against grass weeds of rice crops.

Abstract: A process for treating optionally oxidized sulphidic material containing one or more heavy metals, by aerobic microbial oxidation of the optionally oxidized sulphidic material in an aqueous suspension using a sulphur oxidizing micro-organism to convert optionally oxidized sulphide into soluble sulphate at a pH sufficient to maintain most of the heavy metals present in a soluble form. A preferred sulphidic material is sulphidic waste, preferably sulphidic slag. The formed sulphate is environmentally less harmful than the sulphide, while the heavy metals compounds are suitable for recovery of the metals using known methods.

Abstract: A process for the preparation of trialkyl gallium compounds, in which an alloy of gallium and magnesium is contacted with an alkyl halide, the alloy having an atomic ratio of gallium to magnesium from about 1:1.6 to about 1:2.4.