Abstract: The invention relates to an improved homogenisation valve, and more particularly, but not exclusively, to a homogenisation valve for use in homogenising emulsion explosives. The homogenisation device comprises a body having a flow passage therethrough, opposing first and second homogenisation members located in the flow passage; the homogenisation members having opposing homogenisation surfaces that form a flow restriction of the flow passage therebetween. At least one of the homogenisation surfaces has a flow resistance being suitable to cause at least part of the flow passing through the flow restriction to be diverged in a non-linear path across the homogenisation surface.

Abstract: The invention relates to an improved homogenization valve, and more particularly, but not exclusively, to a homogenization valve for use in homogenizing emulsion explosives. The homogenization device comprises a body having a flow passage therethrough, opposing first and second homogenization members located in the flow passage; the homogenization members having opposing homogenization surfaces that form a flow restriction of the flow passage therebetween. At least one of the homogenization surfaces has a flow resistance being suitable to cause at least part of the flow passing through the flow restriction to be diverged in a non-linear path across the homogenization surface.

Abstract: The invention relates to an adduct of polyalk(en)yl succinic anhydride and a compound of formula (I): wherein R1 is hydrogen, hydroxyl, hydrocarbyl, hydroxyhydrocarbyl, carbamyl, 1-acetyl, amino, or nitro; R2 is hydrogen, hydroxyl, hydrocarbyl, hydroxyhydrocarbyl, carbamyl, 1-acetyl, amino, or nitro; R3 is hydrogen or hydrocarbyl; and X is O, S or NH; or a derivative of such an adduct. The invention also relates to an emulsifier comprising such an adduct or derivative, and the invention also relates to compositions including such an emulsifier.

Abstract: A drilling mud additive comprising graphite, a silicate such as phlogopite and a silicone such as dimethylpolysiloxane and drilling muds including the additive.

Abstract: An improved composition and process for forming a corrosion-resistant complex oxide coating on a zinc or zinc alloy surface incorporates in an aqueous alkaline composition of pH value greater than 11 at least three complexed polyvalent metals, one of which is trivalent chromium.

Abstract: A composition and process are useful for providing a corrosion resistant and lacquer receptive coating on the surface of drawn and ironed tin coated cans. The surface is contacted with an aqueous solution of tin containing ions, phosphate and an aromatic nitro compound at pH 1.5 to 3.5 preferably by spray application.

Abstract: An aqueous wet blasting composition and process for cleaning a ferrous surface which reduces the rusting of the surface due to aqueous contact by incorporating phosphate ions and an imine compound in the composition.

Abstract: A composition and method are particularly suitable for applying a corrosion preventive and paint receptive coating to metal surfaces where immersing treatment is impossible or impractical. A brush-on aqueous composition free of reducing agent containing hexavalent and trivalent chromium and at least 5 g/l of silica or silicate together with an organic solvent and thickening agent is applied to the metal surface and dried.