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Production of oxidic nanoparticles

A technology of nanoparticles and oxides, which is applied in the direction of nanostructure manufacturing, titanium oxide/hydroxide, zirconium oxide, etc., and can solve the problems that cannot be carried out easily and continuously

Inactive Publication Date: 2007-11-14
MERCK PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Still others cannot be easily performed continuously, or have to be performed with dilute solutions, so that large quantities of solvent have to be disposed of or worked up later

Method used

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Examples

Experimental program
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Embodiment 1

[0073] Nanoscale Titanium Oxide with Narrow Particle Size Distribution

[0074] A solution of titanyl sulfate (15% in dilute sulfuric acid, Aldrich) was prepared in a vessel. A solution of Span 80 (Fluka) and Lutensol TO3 (BASF) in cyclohexane (ratio 1.5:1.5:9 (wt%)) was prepared in a second vessel. From a storage container, the two solutions are fed by means of a gear pump through a micromixer as described in patent application DE 1 95 11 603 A1. (The micromixers used work on the "split-recombine" principle. Corresponding micromixers are currently sold under the trade name caterpillarmixers by the Institut für Mikromechanik Mainz). The volume streams are chosen such that their ratio is 1:5, based on the aqueous and organic phases. An emulsion is formed from a solution of starting materials. After mixing in a micromixer, the resulting emulsion was added directly via a thin line to a solution consisting of 60 wt% cyclohexane and 40 wt% methoxyethylamine. Upon addition to th...

Embodiment 2

[0079] The method was carried out as described in Example 1, except that the continuous phase now consisted of a solution of Span 80 (Fluka) and Lutensol TO3 (BASF) in cyclohexane (ratio 1.5:1.5:18 (wt %)).

[0080] The particles obtained have a diameter of 80-120 nm and are likewise redispersible in organic solvents.

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Abstract

A landing gear assembly for supporting a trailer. The landing gear assembly having first and second legs and a connecting member. Each leg is configured to selectively extend and retract in length. The connecting member operatively connects the first and second legs and is rotatable about an axis relative to the trailer and is axially movable between a first position and a second position. The first and second legs are each configured to extend in length a first amount per revolution of the connecting member about the axis of the connecting member when the connecting member is in the first position. The first and second legs are each configured to extend in length a second amount per revolution of the connecting member about the axis of the connecting member when the connecting member is in the second position. The first amount is greater than the second amount.

Description

technical field [0001] The present invention relates to (semi)metal oxides and hydroxides such as SiO 2 、TiO 2 , ZrO 2 , ZnO, and other (semi)metal salts such as BaSO 4 A process for the preparation of said compounds which can be prepared by precipitation in the form of nanoparticles from emulsions in aqueous solutions, and to their use. Background technique [0002] Nanoscale materials have favorable properties for various industrial applications due to their large surface area / volume ratio, which makes them more suitable for various applications than micro or coarse particles with the same chemical composition. The advantageous applications of these materials are found in almost all branches of industry. [0003] The properties of nanomaterials are especially advantageous for use as fillers or for use in catalytic processes. For example, nanotechnological improvements of already available catalysts have enabled access to supported catalysts with novel properties, or e...

Claims

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Application Information

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IPC IPC(8): C01B13/32C01G23/053C01G25/02C01G9/02C01B33/193C01F11/46C09C1/36C09C1/04C09C1/00C09C3/08C09K23/42
CPCB01J19/0093B01J2219/00889C01G23/053B82Y5/00C01G23/0532C01G25/02C09C3/08C01P2004/64A61Q17/04C09C1/043C01P2004/04C01B13/328C09C1/3669A61K2800/413C01P2004/62C01G9/02A61K8/29B82Y30/00B82B3/00C01B13/32B82Y40/00
Inventor M·库什R·安塞尔曼
Owner MERCK PATENT GMBH
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