公开(公告)号：US11192794B2

公开(公告)日：2021-12-07

申请号：US16770593

申请日：2018-11-23

Applicant: EVONIK OPERATIONS GMBH

Inventor： Franz Schmidt ,  Johan Anton ,  Matthias Pascaly ,  Andrea Heinroth ,  Stefan Wieland ,  Heiko Morell ,  Peter Kress ,  Michael Hagemann

IPC: C01B39/02 ,  C01B33/20 ,  C01B39/20 ,  C01B39/46 ,  C01B39/14 ,  C01B39/26 ,  C01B39/38

Abstract: The present invention relates to a process for preparing a pulverulent, porous crystalline metal silicate, comprising the following steps: a) hydrothermal synthesis in an aqueous mixture comprising (A) at least one silicon source, (B) at least one metal source and (C) at least one mineralizer to obtain an aqueous suspension comprising a porous crystalline metal silicate as reaction product; and b) calcination of the reaction product, characterized in that the calcination is conducted by means of flame spray pyrolysis at an adiabatic combustion temperature within a range of 450-2200° C., wherein the suspension having a solids content of 70% by weight which is obtained in step a) is sprayed into a flame generated by combustion of a fuel in the presence of oxygen to form a pulverulent, porous crystalline metal silicate.

公开(公告)号：US20210062106A1

公开(公告)日：2021-03-04

申请号：US16962268

申请日：2019-01-22

Applicant: Evonik Operations GmbH

Inventor： Stephan Wieber ,  Sofia Sirak ,  Daniel Neß ,  Roland Wilkens ,  Rebecca Jüstel ,  Günter Schmitt ,  Michael Hagemann

IPC: C10M169/04 ,  C08F279/02 ,  C08K3/38 ,  C08J3/20 ,  C10M149/06 ,  C10M125/26 ,  C10M161/00

Abstract: The invention relates to polymeric-inorganic nanoparticle compositions and preparation processes thereof. The invention also relates to an additive and lubricant composition comprising these polymeric-inorganic nanoparticle compositions, as well as to the use of these polymeric-inorganic nanoparticle compositions in an oil lubricant formulation to improve tribological performance, in particular to improve anti-friction performance on metal parts.

公开(公告)号：US11434146B2

公开(公告)日：2022-09-06

申请号：US16476274

申请日：2017-12-20

Applicant: EVONIK OPERATIONS GMBH

Inventor： Peter Kress ,  Stipan Katusic ,  Armin Wiegand ,  Harald Alff ,  Michael Hagemann

IPC: C01G25/00 ,  B01J4/00 ,  B01J10/00 ,  B01J19/26 ,  C01F11/04

Abstract: A process for producing a metal oxide powder by flame spray pyrolysis where a) a stream of a solution containing at least one oxidizable or hydrolysable metal compound is atomized to afford an aerosol by means of an atomizer gas, b) this aerosol is brought to reaction in the reaction space of the reactor with a flame obtained by ignition of a mixture of fuel gas and air, c) the reaction stream is cooled and d) the solid product is subsequently removed from the reaction stream, wherein e) the reaction space comprises one or more successive double-walled internals, wherein the wall of the double-walled internal facing the flame-conducting region of the reaction space comprises at least one slot through which a gas or vapour is introduced into the reaction space in which the flame is burning and f) the slot is arranged such that this gas or vapour brings about a rotation of the flame.

公开(公告)号：US11180712B2

公开(公告)日：2021-11-23

申请号：US16962268

申请日：2019-01-22

Applicant: Evonik Operations GmbH

Inventor： Stephan Wieber ,  Sofia Sirak ,  Daniel Neß ,  Roland Wilkens ,  Rebecca Jüstel ,  Günter Schmitt ,  Michael Hagemann

IPC: C10M169/04 ,  C08F279/02 ,  C08J3/20 ,  C08K3/38 ,  C10M125/26 ,  C10M149/06 ,  C10M161/00 ,  C10N20/04

Abstract: The invention relates to polymeric-inorganic nanoparticle compositions and preparation processes thereof. The invention also relates to an additive and lubricant composition comprising these polymeric-inorganic nanoparticle compositions, as well as to the use of these polymeric-inorganic nanoparticle compositions in an oil lubricant formulation to improve tribological performance, in particular to improve anti-friction performance on metal parts.