The pore size issue of ceramic membranes
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This post was last edited by Refinery Operator on 2011-4-25 07:06. What is the lowest pore size achievable for ceramic membranes currently, both domestically and internationally? I would like to use a ceramic membrane with a pore size corresponding to a molecular weight of around 10,000. Someone who consulted Kyogo Company said that it’s not possible to achieve a molecular weight of around 10,000 with ceramic membranes (this is the case for manufacturers both at home and abroad); an organic membrane is required instead. Ceramic membranes can achieve a minimum molecular weight of 300,000, which corresponds to 0.05 μm. Therefore, I would like to ask those with experience for advice. Thank you.
This post was last edited by Refinery Operator on 2011-4-25 07:07. I don’t know which person the original poster is referring to with “the people from Kyuugo Company”; (I am from Kyuugo) and it’s irresponsible of them to speak in such a manner. Ceramic membranes with a molecular weight of 10,000 can be used; the smallest ceramic membranes I’ve used abroad have a cutting molecular weight of 1,000. If you have any questions, you can also contact us by phone directly***********
The gel method can be used, but the wear resistance of the gel layer is somewhat poor; there are requirements regarding the hardness of the particles in the material!
The pore size of ceramic membranes needs to be this small; there are products available abroad, but I haven’t heard of them being used on a large scale. Kuugo’s ceramic membrane with a small pore size is now available as well; it has a molecular weight cutoff of around 10,000 and can be tried out.
This post was last edited and replied to by Refinery Operator on 2011-4-24 at 14:04. Reply to 1# chaoqin: Our company supplies inorganic ceramic membranes from abroad, with a wide range of membrane pore sizes available. Membrane tube specifications: the outer diameter D (mm) of the membrane tubes is φ10, φ20, φ25, φ30, φ41, φ43； The length L (mm) of the membrane tube is available in: 250, 600, 850, 1000, 1020, 1178, 1201, etc. Cutting molecular weights (membrane pore sizes) include: microfiltration: 0.07μm, 0.14μm, 0.2μm, 0.3μm, 0.45μm, 0.8μm, 1.4μm ； Ultrafiltration: 15kD, 50kD, 100kD, 150kD, 300kD ； Nanofiltration: 1kD, 3kD, 5kD, 8kD ；