Abstract:
An ilmenite up-grading process characterised by the step of leaching the ilmenite with a hydrochloric acid solution containing at least 10% by weight of HCl and at least 5% by weight of one or more soluble chlorides. Particularly suitable soluble chlorides include ferrous chloride, manganese chloride, magnesium chloride, nickel chloride, calcium chloride and ammonium chloride.
Abstract:
An improved process for the manufacture of cis-8-dodecen-1-ol acetate, the sex pheromone of the oriental fruit moth Cydia molesta, comprises the steps of: i. reacting 1-chloro-6-iodohexane with pent-1-yne in liquid ammonia in the presence of lithium amide as a catalyst; ii. reacting the product of step (i) with an alkali metal cyanide in the presence of a metal iodide as catalyst; iii. subjecting the product of step (ii) to alkaline hydrolysis; iv. reducing the product of step (iii) with sodium bis(methoxyethoxy) aluminium hydride; v. acetylating the product of step (iv); and vi. reducing the product of step (v) with bis(sec-isoamyl)borane.
Abstract:
New Insecticides comprising 1,1-bis(4-substituted phenyl)-2nitropropanes,-2-nitrobutanes and -2-methyl-2-nitropropanes wherein the 4-substituents of the phenyl radicals are nonidentical lower alkoxy groups, or identical or non-identical alkylthio groups, and such compounds wherein one of the 4substituents is replaced by a 3,4-methylene-dioxy group. These compounds are prepared by condensing the appropriate psubstituted-benzaldehyde with the appropriate nitro-alkane and reacting the carbinol product with the appropriately substituted benzene.
Abstract:
The invention provides derivatives of 2,2-diphenyl-3,3dimethyloxetane in which the phenyl groups are substituted with alkoxy, alkylthio and/or methylenedioxy groups, which have insecticidal properties and the invention also provides insecticidal compositions thereof.
Abstract:
Techniques and apparatus for measuring the concentration of elements in a solid metal sample by atomic absorption and fluorescence are described. A silica disc with an annular discharge-suppressing gap surrounding the sample area and an Oring seal are used to locate a surface of the sample for sputtering, and gas passages in the disc allow sputtered atoms to be swept into the body of a vacuum chamber for convenient analysis.
Abstract:
A body to serve as a spreader for particulate material dropped from an aircraft, said body having a pair of upright side walls which diverge away from one another and progressively decrease in height in the front to rear direction and a pair of ledges extending longitudinally of the side walls and projecting outwardly one from the botton of each side wall.
Abstract:
A smoke monitoring instrument having first and second chambers, each with a respective photodetector means, a light source common to both chambers and positioned to illuminate part of the interior of each chamber, means for conveying a first air sample from the space to be monitored into said part of the first chamber, means for conveying a second air sample from outside the space into said part of the second chamber, each photodetector means being arranged to receive light from the source which is scattered by its respective air sample but not to receive light directly from the source whereby the effects of suspended material in the first sample originating from outside the space to be monitored can be observed or removed from the output of the instrument.
Abstract:
A method of modifying the surface properties of particulate mineral materials by forming on the surface of the particles a coating having a significant number of acidic sites with pKa values of less than 2.8.