摘要:
The invention relates to a method for reducing aerosol emissions from a urea granulation plant with a recovery of the resulting scrubber bleeds, with • a granulator producing urea from a concentrated urea solution and an evaporation of the included water, giving urea granulates and an exhaust of dust, ammonia and ammonium cyanate, and • a following scrubbing or removing stage for the dust, and • a following scrubbing acid stage, resulting in a first stream comprising mainly aerosols and a second stream comprising ammonium salts, and • a following aerosol stage with spray and collection devices, releasing a first stream of an exhaust of air, and a second stream of ammonium cyanate and water, and • the second stream of the aerosol stage of ammonium cyanate and water is recovered into the urea granulation plant or into a urea fertilizer plant.
摘要:
The invention relates to a novel method for the 'dry' production of sodium percarbonate (dry process). Monohydrate crystal is reacted with a quasi-stoichiometric quantity of concentrated aqueous hydrogen peroxide solution, in relation to the quantity of active oxygen required in the sodium percarbonate. This method can be combined to great advantage with the subsequent compaction of the sodium percarbonate obtained. Sodium percarbonate products containing varying concentrations of active oxygen of at least 10 weight percent, but in particular with high active oxygen concentrations of above 14.5 weight percent, can be produced. The resulting sodium percarbonate products are characterized in that they have remarkably advantageous characteristic as regards dissolution rate, stability and compatibility with detergent base, and are superior to conventional sodium percarbonates obtained, for example, by a crystallisation process. The invention also relates to said percarbonate sodium products and detergent compounds containing same.
摘要:
Method of making compositions comprising a plurality of particles having improved dispersibility, floodability, flowability, fluidization, packing factor, and/or tap density and/or decrease bulk volume and/or entrained gas of the plurality of particles relative to the plurality of particles free of nanoparticles.
摘要:
A granulator device (101) for the treatment of powdered products comprises a closed container (102) forming a chamber (103) for treatment of the products, filter elements (104, 105) projecting into the treatment chamber (103), the filter elements comprising a multi-layer filtering wall (105) through which a fluid current can pass, and powder removing parts (106; 107, 108, 109, 110) designed to diffuse at least one service fluid directed towards at least the filtering wall (105); the powder removing parts (106; 107, 108, 109, 110) having at least first diffuser nozzles (107) and at least second diffuser nozzles (108) to diffuse the service fluid so as to free the filtering wall (105) of the powders trapped in it; there also being parts (140, 142, 147) for supporting and driving the filter elements (104, 105) which can change the angle of the filter elements (104, 105) from a first operating position, in which at least the first nozzles (107) act on the filtering wall (105), to a second operating position in which the filter elements (104) are set at an angle to the first operating position to allow the second diffuser nozzles (108) to operate on the filtering wall (105).
摘要:
Method and system of producing microparticles loaded with biologically active drugs, including proteins such as ICAM-1, for controlled release of the drugs in a nasal passageway. The method includes introducing a drug/polymer feed solution and an emulsifier into a first mixing chamber to create an emulsion, then mixing a cross-linking agent together with the emulsion under controlled conditions to create microparticles loaded with the drug. The system includes a first mixing chamber, in which the emulsion is created, having a first port for introducing the drug/polymer solution, and a second port angled substantially perpendicular to the first port for introducing the emulsifier. A second mixing chamber adjacent to the first mixing chamber receives the emulsion and either contains a cross-linking agent or receives a stream of a cross-linking agent to solidify the microparticles. The formed microparticles are filtered and deaggregated to form individual microparticles that then may be formulated for nasal passageway delivery.
摘要:
The invention relates to a method for producing water dispersible dry powders from hardly soluble compounds, whereby a dispersion is provided, containing the poorly soluble compound in a microdispersed form in a dispersion agent. The dispersion of the poorly soluble compound is concentrated by tangential-filtration and the dispersion agent is removed. The invention also relates to preparations based on said water dispersible dry powders.