公开(公告)号：DE2338784A1

公开(公告)日：1974-02-14

申请号：DE2338784

申请日：1973-07-31

Applicant: STAMICARBON

Inventor： ROOIJ ABRAHAM HERMANUS DE ,  GOETTSCH REIJER

IPC: B01D11/04 ,  C07D201/16 ,  C07D205/08 ,  C07D41/06

公开(公告)号：AU4185572A

公开(公告)日：1973-11-08

申请号：AU4185572

申请日：1972-05-03

Applicant: STAMICARBON

Inventor： ROOIJ ABRAHAM HERMANUS DE

IPC: C07D201/04 ,  C07D201/16 ,  C07D41/06 ,  C07D27/08

Abstract: A process for preparing and recovering lactams by the so-called Beckmann rearrangement of the corresponding ketoximes in a sulfuric acid medium is disclosed, wherein the mixture of lactam and sulfuric acid medium obtained from the Beckmann rearrangement is mixed with an aqueous solution of ammonium sulfate obtained as a by-product in the synthesis of hydroxylammonium sulfate in the preparation of said ketoximes. The lactam is then extracted from the resulting less acidic solution and the remaining acid solution, comprising an aqueous solution of ammonium hydrogen sulfate, is thermally decomposed to produce recoverable sulphur dioxide.

公开(公告)号：DE1189540B

公开(公告)日：1965-03-25

申请号：DEST020907

申请日：1963-07-25

Applicant: STAMICARBON

Inventor： ROOIJ ABRAHAM HERMANUS DE

IPC: B01J39/18

公开(公告)号：DE1189539B

公开(公告)日：1965-03-25

申请号：DEST020876

申请日：1963-07-17

Applicant: STAMICARBON

Inventor： ROOIJ ABRAHAM HERMANUS DE

IPC: C08G12/32