摘要:
An inorganic membrane filtration article and methods for making the same. The membrane filtration article includes a sintered flow-through ceramic honeycomb with a plurality of partition walls defining a plurality of open channels from an inlet end of the honeycomb to an outlet end of the honeycomb. The honeycomb is formed from a cordierite composition with low-sodium and/or low-potassium content for enhanced filtration performance.
摘要:
The invention provides a method comprising: providing a bentonite barrier composition comprising: bentonite; and a polyanionic low molecular weight polymer; and forming a containment using the bentonite barrier composition to provide at least partial separation for a containment from its environment.
摘要:
Processes for fabricating ceramic membranes include providing a porous substrate having at least one inner channel extending therethrough and having surfaces defined by porous walls, depositing a coating slurry on surfaces of the inner channel(s), and sintering. Sintering temperatures for the processes range from about 400 °C to 800 °C. Coating slurries for use in the processes include a boehmite sol and a colloidal suspension of porous alumina particles.
摘要:
Methods of making inorganic membranes, for example, methods of making gamma-alumina inorganic membranes which can be useful for, for example, molecular level gas separations and/or liquid filtration are described.
摘要:
Methods for preparing porous inorganic coatings on porous supports using certain pore fillers, and porous supports coated with porous inorganic coatings. The porous inorganic coatings may serve as membranes useful in, for example, liquid-liquid, liquid-particulate, gas-gas, or gas-particulate separation applications.
摘要:
The invention relates to a membrane filter (1) comprising a moulded body (2) for separating substance mixtures, especially gas mixtures (5) of different molar masses, and to a method for producing such a membrane filter (1). By providing the membrane filter (1) with a cement-bound porous material, especially micro-concrete, as an essential material component having a rock graining with a small particle size, a membrane filter is created, combining low production costs, a good mechanical loadability, and a good temperature resistance. The pore size can be approximately randomly adjusted at a low cost during the production.
摘要:
The ceramic hollow fibre membrane according to the invention has an external diameter of about 4 mm, a wall thickness of 0,52-0,54 mm, and is provided with a thin ceramic coating either on the inside or on the outside of the fibre membrane. In a method for producing these hollow fibre membranes, a paste is introduced into three spinnerets (3), which produce three continuous fibres which are cut at desired lengths. Subsequently, the fibres (5) are laid against each other on a heating plate (6) in a furnace (7) to remove internal stresses. Next, the fibres (5) are placed in a burn-off furnace (8) in which hot air is circulated to remove the binder system. Subsequently, the fibres (5) are laid down and stacked in a sintering installation (10) in which they are sintered. After that a ceramic powder coating is applied either on the inside or outside of the fibre membrane, and then the coating is dried and sintered.