Abstract: A waste processing apparatus is disclosed, comprising a waste processing vessel for holding waste and treatment fluid during processing; and a blade arrangement provided in the waste processing vessel, for shredding the waste; the waste processing vessel comprising a waste processing zone, in which fluid can be retained, such that waste provided to the waste processing vessel can be shredded by the blade arrangement and immersed in treatment fluid in the waste processing zone. A related method of waste treatment is also disclosed, as is a use of a solution comprising a disinfectant and a diluent in the treatment of biohazardous waste, wherein the disinfectant comprises peracetic acid and hydrogen peroxide.

Abstract: A shredding assembly is disclosed which includes a fixed blade array and a rotatable blade array configured to rotate relative to the fixed blade array about a rotational axis. The rotatable blade array has a plurality of rotatable blades. A rotatable blade includes a main body extending in an outwardly radial direction with respect to the rotational axis, a first cutting face configured for cutting in a first rotational direction of the rotatable blade array, and a second cutting face configured for cutting in a second rotational direction of the rotatable blade array. The plurality of rotatable blades are interspersed with the fixed blade array such that, during rotation of the rotatable blade array, at least a portion of the radial extent of the main body passes through a gap between adjacent fixed blades of the fixed blade array.

Abstract: A binderless zeolite adsorbent for separation of oxygen from a gaseous stream. The adsorbent is a blend of a lithium exchanged zeolite 13X, a lithium exchanged low silica zeolite X zeolite, and halloysite clay. Also disclosed is a process of making the binderless zeolite adsorbent. Further disclosed is a process for production of oxygen from a gaseous stream utilizing the binderless zeolite adsorbent.

Abstract: A molecular sieve blend with improved performance characteristics produced by preparing or obtaining a hydrophilic zeolite, particularly a hydrophilic zeolite A with a low SiO2:Al2O3 ratio, preparing or obtaining a hydrophobic silicon based binder, particularly a hydrophobic colloidal silica or a hydrophobic siloxane based material, mixing the zeolite with the silicon based binder and, in one embodiment, a seed containing small quantities of a clay binding agent and the zeolite, to form a mixture, and forming the mixture into the molecular sieve blend.

Abstract: A process for the production of a molecular sieve blend with improved performance characteristics produced by preparing or obtaining a hydrophilic zeolite, particularly a hydrophilic zeolite A with a low SiO2:Al2O3 ratio, preparing or obtaining a hydrophobic silicon based binder, particularly a hydrophobic colloidal silica or a hydrophobic siloxane based material, mixing the zeolite with the silicon based binder and, in one embodiment, a seed containing small quantities of a clay binding agent and the zeolite, to form a mixture, and forming the mixture into the molecular sieve blend.

Abstract: A molecular sieve blend with improved performance characteristics produced by preparing or obtaining a hydrophilic zeolite, particularly a hydrophilic zeolite A with a low SiO2:Al2O3 ratio, preparing or obtaining a hydrophobic silicon based binder, particularly a hydrophobic colloidal silica or a hydrophobic siloxane based material, mixing the zeolite with the silicon based binder and, in one embodiment, a seed containing small quantities of a clay binding agent and the zeolite, to form a mixture, and forming the mixture into the molecular sieve blend.

Abstract: A process for the production of a molecular sieve blend with improved performance characteristics produced by preparing or obtaining a hydrophilic zeolite, particularly a hydrophilic zeolite A with a low SiO2:Al2O3 ratio, preparing or obtaining a hydrophobic silicon based binder, particularly a hydrophobic colloidal silica or a hydrophobic siloxane based material, mixing the zeolite with the silicon based binder and, in one embodiment, a seed containing small quantities of a clay binding agent and the zeolite, to form a mixture, and forming the mixture into the molecular sieve blend.

Abstract: A process for the production and use of a molecular sieve blend with improved performance characteristics produced by preparing or obtaining a hydrophilic zeolite, particularly a hydrophilic zeolite 3A with a low SiO2:Al2O3 ratio, preparing or obtaining a hydrophobic silica binder, particularly a hydrophobic colloidal silica, mixing the zeolite with the silica binder to form a mixture, and forming the mixture into the molecular sieve blend.

Abstract: A process for the production and use of a molecular sieve blend with improved performance characteristics produced by preparing or obtaining a hydrophilic zeolite, particularly a hydrophilic zeolite 3A with a low SiO2:Al2O3 ratio, preparing or obtaining a hydrophobic silica binder, particularly a hydrophobic colloidal silica, mixing the zeolite with the silica binder to form a mixture, and forming the mixture into the molecular sieve blend.

Abstract: A reverse circulation down-the-hole drill includes an outer wear sleeve (1) and a backhead (2) assembly located at one end of the outer wear sleeve (1) for connecting the drill to a double-walled drill string and to a source of pressure fluid to actuate the drill. A fluid diverter (5) is mounted inside the outer wear sleeve (1) adjacent to the backhead (2). An inner tube (9), concentric with the outer wear sleeve (1) and extending into the fluid diverter (5), defines at least part of a central return passageway in the drill. A bit (10), located by a chuck (3) at the other end of the outer wear sleeve (1), is slidably mounted on the inner tube (9) in an annular chamber (28, 30) defined by the outer wear sleeve, by the inner tube, by the diverter at one end (28), and by the bit at the other end (30).

Abstract: A reverse circulation down-the-hole hammer drill apparatus for drilling rock and overburden comprises a fluid-driven piston which reciprocates in an annular chamber to repeatedly strike a bit suspended at one end of the chamber, for example in a splined mounting. Fluid is exhausted through the bit directly to the face of the bit and cuttings and debris are returned via a central throughbore in the bit and in the drill apparatus to the surface. The bit drops forward on encountering a void during drilling operations to open by-pass passages which exhaust fluid directly into the throughbore temporarily so as to prevent any loss of return of sample to the surface.