公开(公告)号：US20220227710A1

公开(公告)日：2022-07-21

申请号：US17613677

申请日：2020-05-24

Applicant: BASF SE

Inventor： Thomas HEYDT ,  Michael SCHMITT ,  Alvaro GORDILLO BOLONIO ,  Andrei-Nicolae PARVULESCU ,  Ulrich MUELLER ,  Michael KUEBLER

IPC: C07D211/74

Abstract: The present invention relates to a process for the production of 2,2,6,6-tetramethyl-4-piperidone particularly comprising (i) providing a reactor containing a catalyst comprising a zeolitic material having a framework structure of FAU, wherein the zeolitic material comprises YO2 and X2O3 in its framework structure, wherein Y is a tetravalent element and X is a trivalent element, wherein the zeolitic material has an YO2 to X2O3 molar ratio of 16 to 175; (ii) preparing a reaction mixture comprising acetone and ammonia; (iii) contacting the catalyst in the reactor with the reaction mixture prepared in (ii) at a temperature in the range of from 40 to 250° C. for obtaining a reaction product comprising 2,2,6,6-tetramethyl-4-piperidone; wherein the mixture prepared in (ii) and contacted with the catalyst in (iii) contains less than 10 weight-% of water based on 100 weight-% of the reaction mixture.

公开(公告)号：US20230295099A1

公开(公告)日：2023-09-21

申请号：US18019368

申请日：2021-08-04

Applicant: BASF SE

Inventor： Thomas HEYDT ,  Alvaro GORDILLO BOLONIO ,  Michael SCHMITT ,  Klaus GUENTHER ,  Ulrich MÜLLER ,  Andrei-Nicolae PARVULESCU ,  Michael KUEBLER

IPC: C07D239/06 ,  B01J29/40 ,  B01J29/65 ,  B01J29/70 ,  B01J37/00 ,  B01J37/08

CPC classification number: C07D239/06 ,  B01J29/405 ,  B01J29/655 ,  B01J29/70 ,  B01J37/0018 ,  B01J37/08

Abstract: The present invention relates to a process for the production of 2,2,4,6,6-pentamethyl-1,2,5,6-tetrahydro-pyrimidine comprising (i) providing a reactor containing a catalyst comprising a zeolitic material, wherein the zeolitic material comprises YO2 and optionally comprises X2O3 in its framework structure, wherein Y is a tetravalent element and X is a trivalent element; (ii) preparing a reaction mixture comprising acetone and ammonia; (iii) contacting the catalyst in the reactor with the reaction mixture prepared in (ii) for obtaining a reaction product comprising 2,2,4,6,6-pentamethyl-1,2,5,6-tetrahydro-pyrimidine; wherein the temperature programmed desorption of ammonia (NH3-TPD) profile of the zeolitic material comprised in the catalyst provided in (i) optionally displays one or more bands associated with medium acid sites, said one or more bands having maxima in the temperature range of from 250 to 500° C., wherein the integration of said one or more bands affords a total value of 0.5 mmol/g or less, and wherein the mixture prepared in (ii) and contacted with the catalyst in (iii) contains less than 10 wt.-% of water based on 100 wt.-% of the reaction mixture.