Abstract: The invention relates to a method for producing, amongst other things, amino-acid and/or hydroxycarboxylic-acid metal chelates, a solvent-free mixture of at least one metal oxide, metal hydroxide, metal carbonate or oxalate, and the solid organic acid is subjected to intensive mechanical stress. According to the invention, this is done in that the reaction partners are introduced in particle form into a fluid stream of a fluid-bed countercurrent mill operating without grinding elements, wherein mechanical activation of at least one of the reaction partners is effected by collision processes within a reaction chamber formed in a region of the fluid stream, and a solid body reaction to form the metal chelate is triggered. The novel method operates very energy-efficiently and with a high specific yield. It leads to a product having compact particles in the small, single-digit micrometer range having a comparatively narrow particle sizc distribution and a large surface. The product is homogenous and very pure.
Type:
Grant
Filed:
January 8, 2018
Date of Patent:
May 16, 2023
Assignee:
TECHNISCHE UNIVERSITAT CLAUSTHAL
Inventors:
Dieter E. Kaufmann, Jan C. Namyslo, Roman Florescu, Birgit Wawrzinek
Abstract: The invention relates to a zeolitic material comprising zeolitic monocrystals, each of which has a pore system encompassing at least one micropore system and at least one macropore system, and to a method for producing a zeolitic material of said type. In said method, porous oxide particles are converted into the zeolitic material in the presence of an organic template and steam.
Type:
Grant
Filed:
August 21, 2015
Date of Patent:
May 28, 2019
Assignees:
Friedrich-Alexander-Universität Erlangen-Nürnberg, Technische Universität Clausthal
Inventors:
Albert Gonche Fortunatus Machoke, Alexandra Inayat, Wilhelm Schwieger, Ana Maria Beltrán Custodio, Erdmann Spiecker, Robert Güttel, Nadine Kruse
Abstract: The invention relates, inter alia, to a method for the production of a ceramic shaped body (22), comprising the following steps: production or provision of a green body (10) having a structured surface region (12), irradiation of at least the structured surface region (12), so that the green body (10) is consolidated in the region of a volume zone (16) including the structured surface region (12), but is not consolidated or is consolidated to only a lesser degree in volume zones further from the surface, separation of the consolidated volume zone (16) including the structured surface region (12) from parts of the green body (10) which have not been consolidated or have been consolidated to only a lesser degree, and optionally scouring of the consolidated volume zone (16) obtained in this way.
Abstract: Ceramic molds are produced by sintering selected portions of a ceramic material with a laser beam to form the mold. The process involves application of at least one layer of a liquid suspension or plastic mass, drying the applied layer, and sintering the dried layer with the laser beam at selected areas to form the mold.
Type:
Grant
Filed:
June 13, 2002
Date of Patent:
December 7, 2004
Assignee:
Technische Universitat Clausthal
Inventors:
Tobias Krause, Sven Engler, Jens Gunster, Jurgen G. Heinrich