公开(公告)号：US20180009742A1

公开(公告)日：2018-01-11

申请号：US15546871

申请日：2016-01-22

Applicant: BASF SE

Inventor： Michael LORENZ ,  Axel FRANZKE ,  Robert BAUMANN ,  Michael BOCK ,  Geert JANSSENS

IPC: C07C263/04 ,  C07C265/14 ,  C07C269/04 ,  C07C271/28 ,  C08G18/76 ,  G01R33/46

CPC classification number: C07C263/04 ,  C07C265/14 ,  C07C269/04 ,  C07C271/28 ,  C08G18/7692 ,  G01R33/46

Abstract: The invention relates to polyphenyl polymethylene polyisocyanates having an NCO number of at least 29% comprising less than 2% by weight ureas, less than 8% by weight carbodiimides or uretonimines and less than 1000 ppm organic chlorine compounds.The polyphenyl polymethylene polyisocyanates can be prepared according to the invention by reacting (i) polyphenyl polymethylene polyamines with organic carbonates to give the corresponding polyphenyl polymethylene polycarbamates, (ii) by thermally cleaving the polyphenyl polymethylene polycarbamates to give the polyphenyl polymethylene polyisocyanates, wherein, prior to the thermal cleavage, the free amino groups or urea groups present in the carhamate crude mixture comprising the polyphenyl polymethylene polycarbamates are reacted with a derivatizing reagent to give amide groups or urethane groups. The polyphenyl polymethylene polyisocyanates can further be prepared according to the invention, prior to the thermal cleavage, by removing compounds having free amino groups or urea groups present in the carbamate crude mixture from the carbamate crude mixture by filtration of the carbamate crude mixture comprising the polyphenyl polymethylene polycarbamates over a solid acidic adsorbent in the presence of an acid dissolved in the carbamate crude mixture.

公开(公告)号：US20180354891A1

公开(公告)日：2018-12-13

申请号：US16061007

申请日：2016-12-07

Applicant: BASF SE

Inventor： Constanze FRANZKE ,  Axel FRANZKE ,  Armin STAMM ,  Markus HARTMANN ,  Robert BAUMANN

IPC: C07C229/36 ,  C07C227/18 ,  C07C227/42 ,  C07C227/02 ,  C11D3/33

CPC classification number: C07C229/36 ,  C07C227/02 ,  C07C227/10 ,  C07C227/18 ,  C07C227/42 ,  C11D3/33

Abstract: Process for manufacturing a crystalline alkali metal salt of the general formula (I) [R1—CH(COO)—N(CH2—COO)2]M13 (I) wherein M1 is selected from alkali metal cations, same or different, R1 is selected from C1-C4-alkyl and CH2CH2COOM1, comprising the step of (b) crystallizing said alkali metal salt from an aqueous solution containing in the range of from 5 to 30% by weight of alkali metal hydroxide, referring to said aqueous solution.