US 11,806,893 B2
Method for material additive manufacturing of an inorganic filter support and resulting membrane
Philippe Lescoche, Piegon (FR); and Jérôme Anquetil, Vaison la Romaine (FR)
Assigned to TECHNOLOGIES AVANCEES ET MEMBRANES INDUSTRIELLES, Nyons (FR)
Appl. No. 17/296,724
Filed by TECHNOLOGIES AVANCEES ET MEMBRANES INDUSTRIELLES, Nyons (FR)
PCT Filed Nov. 26, 2019, PCT No. PCT/FR2019/052807
§ 371(c)(1), (2) Date May 25, 2021,
PCT Pub. No. WO2020/109715, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 1871947 (FR), filed on Nov. 27, 2018.
Prior Publication US 2022/0032499 A1, Feb. 3, 2022
Int. Cl. B28B 1/00 (2006.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 70/00 (2020.01); B33Y 80/00 (2015.01); B01D 69/10 (2006.01); C04B 35/46 (2006.01); C04B 35/634 (2006.01); C04B 35/636 (2006.01); C04B 38/00 (2006.01)
CPC B28B 1/001 (2013.01) [B01D 69/10 (2013.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 70/00 (2014.12); B33Y 80/00 (2014.12); C04B 35/46 (2013.01); C04B 35/6365 (2013.01); C04B 35/63488 (2013.01); C04B 38/0054 (2013.01); C04B 38/0074 (2013.01); C04B 2235/3232 (2013.01); C04B 2235/5436 (2013.01); C04B 2235/5445 (2013.01); C04B 2235/665 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for manufacturing a monolithic inorganic porous support for a tangential filtration membrane, in which is arranged a channel for the circulation of a fluid medium to be treated, comprising:
providing a 3D printing machine having an extrusion head movably mounted in space relative to, and above, a fixed horizontal plate;
providing the 3D printing machine with an inorganic composition comprising a powdery inorganic phase and a matrix that form a paste;
wherein the inorganic phase comprises particles having an average diameter of from 0.1 μm to 150 μm;
depositing, stratum by stratum, a string of the inorganic composition onto the plate, and building a manipulable and three-dimensional green structure with the string based on a 3D digital model;
wherein each stratum is a set of strings extruded at the same altitude relative to the plate in accordance with the 3D digital model predefined for said altitude;
accelerating a consolidation of the green structure by evaporating a solvent contained in the matrix with a convective or radiative consolidation device, as the string is extruded, and in accordance with the 3D digital model;
sintering the green structure at a temperature that is from 0.5 to 1.0 times the melting temperature of material forming the powdery solid inorganic phase, to form the support;
wherein the support has an interconnected open porosity of from 10% to 50%,
wherein the support has an average pore diameter of from 0.5 μm to 50 μm; and
wherein the support is able to withstand an internal pressure of at least 30 bars without bursting.