公开(公告)号：US3991047A

公开(公告)日：1976-11-09

申请号：US608249

申请日：1975-08-27

Applicant: Radomir Moudry ,  Bruno Domeisen ,  Hanswerner Philipp

Inventor： Radomir Moudry ,  Bruno Domeisen ,  Hanswerner Philipp

IPC: C01B17/50 ,  C01B17/74 ,  C01C1/24 ,  C01F5/12 ,  C07D201/04 ,  C07D201/16

CPC classification number: C07D201/04

Abstract: In a process for the preparation of lactam from cycloalkanone comprising reacting said alkanone with hydroxylamine sulfate to form the corresponding cycloalkanone oxime followed by Beckman rearrangement to yield said lactam and neutralization of the sulfuric acid formed by ammonia whereby ammonium sulfate is formed as a byproduct, the improvement which comprises reacting said ammonium sulfate with an alkaline-earth metal oxide or hydroxide to form an alkaline earth metal sulfate and ammonia, heating said alkaline-earth metal sulfate to decompose it into said alkaline-earth metal oxide and sulfur dioxide and/or sulfur trioxide, converting said sulfur dioxide and/or sulfur trioxide into sulfuric acid, whereby said sulfuric acid and said ammonia are capable of reuse in said process.

Abstract translation: 在由环烷酮制备内酰胺的方法中，包括使所述烷酮与硫酸羟胺反应形成相应的环烷酮肟，然后进行贝克曼重排，得到所述内酰胺并中和由氨形成的硫酸，由此形成副产物硫酸铵。 改进包括使所述硫酸铵与碱土金属氧化物或氢氧化物反应以形成碱土金属硫酸盐和氨，加热所述碱土金属硫酸盐以将其分解成所述碱土金属氧化物和二氧化硫和/或硫 三氧化硫，将所述二氧化硫和/或三氧化硫转化为硫酸，由此所述硫酸和所述氨能够在所述方法中再利用。