Screen printing of titanium and zinc oxides layers in glazed ceramic pieces showing photocatalytic activity to degrade organic dye solutions
Processes National
Batista, João; Marcos, Pedro; Marto, John
The present invention relates to deposition, by screen-printing, of oxides layers such as TiO2 and ZnO on glazed ceramic pieces, to promote organic dyes degradation by photocatalysis in an aqueous medium. Deposition conditions optimization and subsequent heat treatment of the obtained layers, as well as the oxide/dye concentrations rati...Ultrasonic method of manufacturing nanowires, nanostrings, nano rods and / or nano sticks of luminescent aluminates and nanostructured composites and its usage
Processes National
Ferreira, José; Zurba, Nadia
The present invention relates to a method of manufacturing new luminescent nanowires, nanostrings, nanorods and/or nanosticks of beryllium, magnesium, calcium, strontium or barium doped cerium (III) aluminates, which uses mechanical ultrasonic energy vibrations (ultrasonication), in addition to milling of precursor particles and re-firi...Use of a crystalline microporous aluminium methylphosphonate for the purification of vinyl chloride
Processes National
Rocha, João; Coutinho, João ; Freitas, Francisco; Valente, Anabela ; Lin, Zhi
The present invention relates to the separation of ethyl chloride and vinyl chloride by absorption using a crystalline microporous aluminium metilphosphate as the absorbent.The absorption ability of aluminium methylphosphonate to ethyl chloride is always higher than to vinyl chloride, at the same temperature and in the press...Use of sludge generated in the water filtration process as workability adjuvant of single coating mortars
Processes National
Batista, João
The present invention relates to the use of sludge generated in the process of filtration and treatment of potable water as a workability adjuvant (setting retarder) of industrial mortars, in replacement of bentonites with a high commercial value. The proper operation control of water treatment system ensures reasonable consistency of p...Aqueous coating compositions for use in surface treatment of cellulosic substrates
Products InternationalNational
Neto, Carlos; Barros, Carmen; Fernandes, Susana; Silvestre, Armando; Gandini, Alessandro;
The present invention relates with the application of novel coating compositions, containing chitosan (and its derivatives) and bacterial cellulose, for the improvement of the final properties of cellulosic based materials, like paper and textile materials. The process involves the preparation of homogeneous bacterial cellulose-chitosan...Ceramic pigments based on industrial waste
Products National
Batista, João; Ribeiro, Manuel; Costa, Maria
The present invention relates to the synthesis of ceramic pigments by solid state reaction from industrial residues: sludges from wastewater treatment plants (WWTP) of metallic surface treatment industries (eg.: anodizing, galvanizing processes), blasting steel grits used in the shipping industry, smelting sands and wastes from cutting ...Expanded clay containing sludge from the filtration process and treatment of water for human consumption
Products National
Batista, João
The present invention relates to the use of sludge generated in the filtration process and treatment of water for human consumption, in expanded clay formulations.The proper control of the operation of the filtration system and water treatment ensures reasonable consistency of properties, in terms of chemical composition and...Expanded clay containing sludge generated in the paper pulp production process
Products National
Batista, João; Ferreira, Victor; Correia, António
The present invention relates to the use of sludge generated in paper pulp production process, in expanded clay formulations. The processing conditions control ensures consistency of sludge properties, in terms of chemical composition and particle size distribution. The sludge has a moisture content greater than 50%, which is almost ent...Fertilizing hydroactive pavement for the geobiochemical cycle of photosynthesis
Products InternationalNational
Segadães, Ana; Morelli, Márcio; Zurba, Nadia
The present invention is concerned with self-locking nonslip paver blocks, laid without using adhesive mortar, highly porous, based on magnesium phosphate cement, manufactured at room temperature by mould casting. The paver blocks combine the typical characteristics of the material (chemical composition, structure, easy and versatile ma...Lightweight aggregates exclusively produced from mixes of sludges generated from cutting and polishing of granite rocks and from filtration of potable water
Products National
Batista, João; Pereira, Fabiano; Monteiro, Miguel
The present invention relates to the use of sludge generated in the granite rocks cutting process and in the filtration and treatment of water for human consumption process in lightweight aggregate formulations. The stable formation of the granite rocks composition and the correct control of the operation of the water treatment system e...Lignocellulosic composites and phase transition materials for thermo insulation and energy storage
Products National
Coutinho, João ; Neto, Carlos
The present invention relates to the formulation and preparation of composites based on lignocellulosic materials by incorporating phase change materials with the purpose of their application in thermal insulation and reversible energy storage. Lignocellulosic materials provide thermal insulation properties to the composite while also p...Luminescent antibacterial toothpaste
Products National
Ferreira, José; Zurba, Nadia
The present invention relates to the formulation of a luminescent antibacterial toothpaste, with application in the hygiene field, oral hygiene and dentistry. This toothpaste is characterized by being chemically comprised of beryllium, magnesium, calcium, strontium or barium doped cerium (III) aluminates encapsulated with TiO2, or a com...Method for the prediction of paraffinic deposits formation in crude oil during extraction, transport and storage
Products National
Coutinho, João ; Daridon, Jean-Luc
The present invention relates to a method to predict the formation of paraffin deposits in crude oil during extraction, transport and storage operations.Often oils contain considerable amounts of heavy n-alkanes that upon cooling or release of gases due to pressure drop, during operation or transport, tend to deposit in stor...Mortars containing phase change material microcapsules, their preparation process and use
Products InternationalNational
Lucas, Sandra ; Ferreira, Victor ; Aguiar, José; Batista, João
The present invention relates to a mortar for use in the interior and exterior coating of construction systems, comprising phase change material (PCM) microcapsules together with a lime binder and other auxiliary materials. The invention also concerns a process for the preparation of these mortars by blending the PCM microcapsules with ...Multifunctional mortars for heat storage, air remediation and self-cleaning, preparation process and usage
Products National
Ferreira, Victor; Lucas, Sandra; Aguiar, José
The present invention relates to mortars for application in indoor and outdoor coating of building systems comprising mixtures in different proportions of phase change materials (PCM) microcapsules and titanium dioxide nanoparticles, together with one or more binders based on lime, cement or gypsum, aggregates, water and other auxiliary...Nanocellular blocks for stonework construction
Products InternationalNational
Segadães, Ana; Morelli, Márcio; Zurba, Nadia
The present invention is concerned with a very porous ceramic block (cellular composite) for wall building, based on magnesium phosphate cement, having a mechanical strength rarely found in products with comparable porosity and low density, which acts as thermal insulator and sound absorption network. By combining the versatility of man...Photoluminescent ceramic pavement for risk and emergency areas for disabled persons and its production process
Products National
Fernandes, Maria; Zurba, Nadia; Leite, Eugénio; Fredel, Márcio
The present invention relates to photoluminescent ceramic floors, which comprise a photoluminescent layer (1) (3) (5) (7) in Figure 1 and produce the contrast with surfaces (2), (4), (6) and (8) of the non-luminescent substrates (inert). Such floors are obtained as ceramic plates, by pressing in moulds, with photoluminescent layer, fire...Production of Mixed-Metal-Oxide Inorganic Pigments from Industrial Wastes such as Slimes from Metal Winning and Processing
Products InternationalNational
Batista, João; Peixoto, Manuel; Cordeiro, Maria
The invention relates to the production of mixed-metal-oxide black inorganic pigments cobalt-free, using industrial waste as raw materials such as a galvanizing sludge from Cr/Ni plating and Fe2O3-based sludge generated from steel wiredrawing. The industrial wastes were collected, analysed, treated and the formulation were prepared by t...Silicon nitride sealing rings with diamond coating
Products InternationalNational
Silva, Rui; Fernandes, António; Amaral, Margarida ; Almeida, Flávia; Oliveira, Filipe ; Costa, Florinda; Carrapichano, João
The present invention refers to a dynamic mechanical sealing system comprising rings manufactured by means of coating silicon nitride ceramic pieces (Si3N4) with diamond films obtained by Chemical Vapour Deposition (CVD). The said mechanical elements should simultaneously warrant low friction, wear-resistance and good sealant properties...Turquoise ceramic pigment free of cobalt, vanadium and zirconium containing chromium/nickel plating sludge
Products National
Batista, João; Ribeiro, Manuel; Costa, Maria; Trindade, Tito;
The present invention relates to the synthesis, by solid state reaction, of a turquoise ceramic pigment, free of cobalt, vanadium and zirconium. This pigment comprises calcium oxide, silica, alumina, tin oxide and nickel oxide, being this the chromophore component. One of the formulations uses sludge from wastewater treatmen...