公开(公告)号：US10669222B2

公开(公告)日：2020-06-02

申请号：US16338633

申请日：2017-10-05

Applicant: BASF SE

Inventor： Sebastian Wloch ,  Gunnar Heydrich ,  Matthias Rauls

IPC: C07C29/78 ,  C07C29/17 ,  B01D9/00

Abstract: The present invention relates to a process for enriching enantiomers from an enantiomer mixture by a fractionating melt crystallization in a melt crystallization apparatus. The invention specifically relates to a process for producing an enantiomer-enriched chiral terpene, in particular of D/L-Isopulegol. The process comprises: i) a crystallization step to obtain a crystallizate and a mother melt and removal of the mother melt from the crystallizate to afford a mother melt fraction; ii) sweating of the crystallizate obtained in step i) to afford a molten sweating fraction and iii) subsequent melting of the sweated crystallizate to afford a molten crystallizate fraction, wherein the optical rotation at least of the sweating fraction is determined online using a polarimeter and the changeover from step ii) to step iii) is controlled online by means of at least one control unit.

公开(公告)号：US09988331B2

公开(公告)日：2018-06-05

申请号：US13658003

申请日：2012-10-23

Applicant: BASF SE

Inventor： Gunnar Heydrich ,  Gabriele Gralla ,  Matthias Rauls ,  Joachim Schmidt-Leithoff ,  Klaus Ebel ,  Wolfgang Krause ,  Steffen Oehlenschläger ,  Christoph Jäkel ,  Marko Friedrich ,  Eike Johannes Bergner ,  Nawid Kashani-Shirazi ,  Rocco Paciello

IPC: C07C29/56 ,  C07C29/17 ,  C07C29/78 ,  C07C45/62 ,  C07C45/82

CPC classification number: C07C29/56 ,  C07B2200/07 ,  C07C29/172 ,  C07C29/78 ,  C07C45/62 ,  C07C45/82 ,  C07C2601/14 ,  C07C2601/16 ,  C07C47/21 ,  C07C35/12 ,  C07C35/17

Abstract: The present invention relates to a particularly economic overall method for producing menthol, specifically for producing optically active, essentially enantiomerically and diastereomerically pure L-menthol and racemic menthol, starting from the starting material citral which is available inexpensively on an industrial scale. The method has the following steps a.1) catalytic hydrogenation of neral and/or geranial to give citronellal, b.1) cyclization of citronellal to isopulegol in the presence of an acidic catalyst, c.1) purification of isopulegol by crystallization and d.1) catalytic hydrogenation of isopulegol to give menthol.

公开(公告)号：US12162822B2

公开(公告)日：2024-12-10

申请号：US17268591

申请日：2019-08-14

Applicant: BASF SE

Inventor： Sebastian Wloch ,  Gunnar Heydrich ,  Gerd Tebben ,  Matthias Rauls

IPC: C07C29/76 ,  B01D9/00 ,  B65D53/00 ,  B65D81/18 ,  C07C35/12

Abstract: The present invention relates to a process for producing menthol particles stabilized against caking, wherein menthol particles are, following shaping, stored for at least 7 days at a temperature of 0 to 30° C., after which the menthol particles are supplied with a minimum input of mechanical energy. The present invention further relates to storage-stable menthol particles and to the use of said menthol particles in household and consumer goods of all kinds.

公开(公告)号：US11884554B2

公开(公告)日：2024-01-30

申请号：US17041789

申请日：2019-03-21

Applicant: BASF SE

Inventor： Christian Riemann ,  Thorsten Beierling ,  Matthias Rauls

IPC: C01G53/06 ,  C01G45/00 ,  C01G45/02 ,  C01G51/04 ,  C01G51/06 ,  C01G53/04

CPC classification number: C01G53/06 ,  C01G45/006 ,  C01G45/02 ,  C01G51/04 ,  C01G51/06 ,  C01G53/04 ,  C01P2004/61

Abstract: Process for precipitating a carbonate or (oxy)hydroxide comprising nickel from an aqueous solution of a nickel salt wherein such process is carried out in a vessel comprising (A) a vessel body, (B) one or more elements that control the hydraulic flow of the slurry formed during the precipitation and that induce a loop-type circulation flow, and (C) a stirrer whose stirrer element is in the vessel but located separately from the element(s) (B).

公开(公告)号：US10294182B2

公开(公告)日：2019-05-21

申请号：US15127135

申请日：2015-03-13

Applicant: BASF SE

Inventor： Matthias Rauls ,  Stefan Ziegler ,  Martin Haubner

IPC: B01D9/00 ,  C07C29/56 ,  C07C37/84 ,  C07F5/06 ,  B01D3/10 ,  B01D11/04 ,  C07C29/80 ,  C07C29/17

Abstract: The present invention relates to a method for separating off a substance from a solution, in which electromagnetic radiation is radiated into the solution, an intensity of the electromagnetic radiation which has been scattered by crystals located in the solution is detected, the detected intensity is compared with a desired intensity (IS) and the temperature of the solution is regulated depending on the difference between the detected intensity and the desired intensity (IS) in such a way that the amount of this difference is reduced. If the amount of the difference between the detected intensity and the desired intensity (IS) is less than a limiting value, a crystallization method is started in which crystals of the substance are obtained which are then separated off.

公开(公告)号：US09802884B2

公开(公告)日：2017-10-31

申请号：US15021398

申请日：2014-09-05

Applicant: BASF SE

Inventor： Marta Reinoso Garcia ,  Markus Hartmann ,  Kati Schmidt ,  Matthias Rauls ,  Thomas Schmidt ,  Paul Klingelhoefer ,  Alfred Oftring ,  Somnath Shivaji Kadam

IPC: C11D3/33 ,  C07C227/42 ,  C07C229/24 ,  C07C227/18 ,  C07C227/36 ,  C07C229/16 ,  C07C253/00

CPC classification number: C07C229/24 ,  C07C227/18 ,  C07C227/36 ,  C07C229/16 ,  C07C253/00 ,  C11D3/33

Abstract: Mixture of L- and D-enantiomers of methyl glycine diacetic acid (MGDA) or its respective mono-, di or trialkali metal or mono-, di- or triammonium salts, said mixture containing predominantly the respective L-isomer with an enantiomeric excess (ee) in the range of from 10 to 75%.