公开(公告)号：DD258749A5

公开(公告)日：1988-08-03

申请号：DD29801886

申请日：1986-12-19

Applicant: STAMICARBON

Inventor： SCHOTMAN ANDRE J ,  HOUTSMULLER HUGO W A ,  DEKKER MARTINUS ,  WILLEMS MICHAEL H ,  BROEKMATE AREND ,  VERMIJS WINFRIED J W

IPC: B01J2/04 ,  B01J2/18 ,  B05B3/10 ,  B01J8/16

公开(公告)号：CA1268477A

公开(公告)日：1990-05-01

申请号：CA499296

申请日：1986-01-09

Applicant: STAMICARBON

Inventor： MUTSERS STANISLAUS M P ,  WILLEMS MICHAEL H ,  WOLVERS WILHELMUS P

IPC: C07C63/06 ,  C07C51/00 ,  C07C51/265 ,  C07C51/42 ,  C07C51/43 ,  C07C51/487 ,  C07C67/00

Abstract: The invention relates to a process for preparing purified, virtually odourless, solid benzoic acid obtained from toluene by oxidation with a gas containing molecular oxygen, by means of a treatment using an inert gas or gas mixture, wherein the benzoic acid to be purified is supplied in a liquid state to a fluid or spouted bed granulator in which the prevailing temperature is below the solidification temperature of the benzoic acid and in which the benzoic acid is treated, during and possibly after the granulating process, with the said gas or gas mixture, the impurities present being taken up in whole or in part in the gas or gas mixture, upon which the benzoic acid thus purified is removed from the fluid or spouted bed device. By the above process, granulation and extraction may be combined, impurities already removed during granulation, permitting recovery of a substantially odourless benzoic acid.

公开(公告)号：CA981989A

公开(公告)日：1976-01-20

申请号：CA169674

申请日：1973-04-26

Applicant: STAMICARBON

Inventor： WILLEMS MICHAEL H

IPC: C05C9/00 ,  B01J2/30 ,  C07C67/00 ,  C07C239/00 ,  C07C273/02 ,  C09K15/04 ,  C10G73/40

公开(公告)号：CA917438A

公开(公告)日：1972-12-26

申请号：CA917438D

Applicant: STAMICARBON

Inventor： GEERTSEMA BEREND J H ,  WILLEMS MICHAEL H