公开(公告)号：US3820972A

公开(公告)日：1974-06-28

申请号：US24972872

申请日：1972-05-02

Applicant: STAMICARBON

Inventor： DE ROOIJ A

IPC: C05B11/06 ,  C07D201/16 ,  C05B11/08

CPC classification number: C07D201/16 ,  C05B11/06 ,  C05B11/08 ,  C05B19/00

Abstract: A process for the recovery of lactams from a Beckmann rearrangement mixture of lactams and sulphuric acid or sulphur trioxide, with the production of a phosphate-containing fertilizer is disclosed. The Beckmann rearrangement mixture is partially neutralized by the addition of ammonium or alkali metal hydroxide, sulphate or carbonate in an amount such that the molar ratio between the sulphate formed and the sum of the sulphate formed and the free sulphuric acid is at least 1/8:1. Thereafter, the resulting partially neutralized solution is extracted by a substantially water-immiscible, organic lactam solvent to separate lactam from the remainder of said mixture, and the remainder of said mixture after such extraction is used for the decomposition of rock phosphate with formation of gypsum and of a free phosphoric acid-containing solution. This latter solution, after removal of gypsum and neutralization of the solution with ammonia or alkali liquor is converted into a dihydrogen phosphate-containing solution from which dihydrogen phosphate, suitable for use in fertilizers, is recovered after evaporative concentration. The process provides for the ready separation of lactams from a Beckmann rearrangement reaction mixture, while at the same time producing, as a by-product, dihydrogen phosphate or a valuable dihydrogen phosphate containing fertilizer.

公开(公告)号：US3801566A

公开(公告)日：1974-04-02

申请号：US3801566D

申请日：1971-06-15

Applicant: STAMICARBON

Inventor： ELMENDORP J ,  DE ROOIJ A

IPC: C07D201/16 ,  C07D41/06

CPC classification number: C07D201/16

Abstract: A PROCESS FOR RECOVERING E-CAPROLATAM FRO SOLUTIONS OF E-CAPROLACTAM AND SULPHURIC ACID AND SO3 IS DISCLOSED WHEREIN AMMONIUM DIHYDROGEN PHOSPHATE OR ALKALI METAL DIHYDROGEN PHOSPHATE IS ADDED TO THE LACTAM, SULPHURIC ACID SOLUTION AND THE SOLUTION THEN SUBJECTED TO EXTRACTION BY A SUBSTANTIALLY WATER IMMISCIBLE SOLVENT FOR THE LACTAM WHEREBY THE LACTAM IS EXTRACTED FROM THE SULPHURIC ACID SOLUTION AND THE LACTAM FREE SULPHURIC ACID SOLUTION CAN BE USED TO PROCESS ROCK PHOSPHATE TO GYPSUM AND PHOSPHORIC ACID AND THE PHOSPHORIC ACID BEING CONVERTED TO AMMONIUM OR ALKALI METAL DIHYDROGEN PHOSPHATE TO BE USED IN TREATING FURTHER SOLUTIONS OF LACTAM AND SULPHURIC ACID.

公开(公告)号：US3729304A

公开(公告)日：1973-04-24

申请号：US3729304D

申请日：1971-06-15

Applicant: STAMICARBON

Inventor： ELMENDORP J ,  DE ROOIJ A

IPC: C05B7/00 ,  C05B11/04

CPC classification number: C05B7/00

Abstract: A process for synthesizing an oxime by reacting an organic carbonyl compound with a hydroxylammonium sulfate and ammonium hydrogen sulfate in the presence of ammonium dihydrogen phosphate whereby an aqueous solution of phosphoric acid and ammonium sulfate is obtained after separating the oxime product therefrom. The phosphoric acid, ammonium sulfate solution can be used in processing rock phosphate with the aid of nitric acid to product a fertilizer composition having a N to P2O5 ratio of approximately 1:1.

Abstract translation: 在磷酸二氢铵存在下使有机羰基化合物与羟基硫酸铵和硫酸氢铵反应合成肟的方法，由此在分离出肟产物后得到磷酸和硫酸铵的水溶液。 磷酸，硫酸铵溶液可用硝酸处理岩石磷酸盐，产生N = P2O5比约为1:1的肥料组合物。

公开(公告)号：US3720758A

公开(公告)日：1973-03-13

申请号：US3720758D

申请日：1970-09-21

Applicant: STAMICARBON

Inventor： DE ROOIJ A ,  AGGENBACH P

IPC: C01B21/14 ,  C01C1/24 ,  C01C1/00 ,  C07C131/10

CPC classification number: C01B21/1418

Abstract: Hydroxylammonium salt solution prepared by catalytically reducing nitrate ions in aqueous solution using molecular hydrogen in a buffered reaction medium containing at least twice the number of sulphate ions as phosphate ions in which the ammonia produced as a by-product of the reaction is removed from the resulting solution as ammonium sulphate is disclosed.

Abstract translation: 在含有至少两倍硫酸根离子数量的缓冲反应介质中，使用分子氢在水溶液中催化还原硝酸根离子制备的羟基铵盐溶液，其中作为反应副产物产生的氨作为磷酸根离子被从所得到的反应中除去 公开了作为硫酸铵的溶液。