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    Process for the manufacture of lactams
    21.
    发明授权
    Process for the manufacture of lactams 失效
    内酰胺的制造工艺

    公开(公告)号：US4049646A

    公开(公告)日：1977-09-20

    申请号：US261220

    申请日：1972-06-09

    Applicant: Herbert Furkert

    Inventor： Herbert Furkert

    IPC: C01B17/50 ,  C01C1/24 ,  C07D201/16 ,  C07D201/04

    CPC classification number: C07D201/16 ,  C01B17/504 ,  C01C1/24 ,  Y02P20/129

    Abstract: In a process for manufacturing a lactam which includes rearranging a cycloalkanone-oxime with sulfuric acid to form said lactam, neutralizing the rearrangement mixture with ammonia to form ammonium sulfate, and separating said lactam and said ammonium sulfate, the improvement which comprises:A. forming the ammonium sulfate into finely divided particles;B. burning the particles at a temperature of 850.degree. - 1250.degree. C. to form an SO.sub.2 -containing gas;C. oxidizing the SO.sub.2 -containing gas to form sulfuric acid; andD. recycling at least a portion of the sulfuric acid to the cycloalkanone-oxime rearrangement step.No external source of sulfuric acid is required. A portion of the SO.sub.2 -containing gas can be used for the manufacture of hydroxylamine sulfate, in which case no external source of SO.sub.2 need be required.

    Abstract translation: 在制造内酰胺的方法中，其包括用硫酸重排环烷酮肟以形成所述内酰胺，用氨中和重排混合物形成硫酸铵，并分离所述内酰胺和所述硫酸铵，其改进包括：

    Process for preparing N-alkyl-lactams
    23.
    发明授权
    Process for preparing N-alkyl-lactams 失效
    制备N-烷基 - 内酰胺的方法

    公开(公告)号：US3975377A

    公开(公告)日：1976-08-17

    申请号：US562905

    申请日：1975-03-28

    Applicant: Claude Poulain

    Inventor： Claude Poulain

    IPC: C07D201/16 ,  C07D201/14

    CPC classification number: C07D201/16

    Abstract: A process for preparing pure N-alkyl-lactams obtained by the reaction, in an organic solvent medium of, the corresponding lactamate of an alkali metal and an alkyl halide. This process consists of treating a reactive mixture of N-alkyl-lactam containing the corresponding cyclo-alkylene imine as an impurity with a current of carbon dioxide, until the cyclo-alkylene imine precipitates completely in the form of an insoluble carbonate, and then separating it from the precipitate.

    Abstract translation: 通过在相应的碱金属和烷基卤的乳酸盐的有机溶剂介质中通过反应制备纯N-烷基 - 内酰胺的方法。 该方法包括将含有作为杂质的相应环 - 亚烷基亚胺的N-烷基 - 内酰胺的反应性混合物与二氧化碳的电流进行处理，直到环 - 亚烷基亚胺完全沉淀为不溶性碳酸酯的形式，然后分离 它从沉淀中。

    Method of purifying polymerizable organic substances
    24.
    发明授权
    Method of purifying polymerizable organic substances 失效
    可聚合有机物质的净化方法

    公开(公告)号：US3969344A

    公开(公告)日：1976-07-13

    申请号：US195840

    申请日：1971-11-04

    Applicant: Jacob Ackermann ,  Pierino Radici

    Inventor： Jacob Ackermann ,  Pierino Radici

    IPC: B01D15/04 ,  B01J39/04 ,  C07D323/06 ,  C08G2/00 ,  C08G63/08 ,  C08G69/18 ,  C07D201/16

    CPC classification number: C07D323/06 ,  B01J39/04 ,  C08G2/06 ,  C08G2/10 ,  C08G4/00 ,  C08G63/08 ,  C08G69/18

    Abstract: A process for purifying a polymerisable monomer selected from the group consisting of cyclic ethers, hydrocarbon olefins, vinyl compounds, aldehydes, lactams of the formula: ##EQU1## wherein x is an integer from 3 to 13 and lactones of the formula: ##EQU2## wherein n is an integer of from 1 to 4 and wherein R represents an hydrogen atom, an alkyl group or an aryl group; said process comprising contacting a liquid consisting of said monomer at a temperature of not greater than 130.degree. centigrade and at a pressure sufficient to keep said monomer in liquid form, with a solid absorbent consisting essentially of a porous reticulated macromolecular alkali metal or alkaline earth metal salt of a cationic exchange resin containing carboxylic, sulfonic or phosphoric acid groups, said cationic exchange resin having a specific surface area of at least one square meter per gram and a pore diameter of from 10.sup.1.3 to 10.sup.5 angstroms and recovering the purified monomer.

    Abstract translation: 一种纯化可聚合单体的方法，该可聚合单体选自环醚，烃烯烃，乙烯基化合物，醛，式（NH）（CH 2）x ANGLE | CO）的内酰胺，其中x为3至13的整数， 式：R-CH-（CH 2）n -COO其中n为1〜4的整数，R为氢原子，烷基或芳基; 所述方法包括在不高于130℃的温度和足以使所述单体保持液态的压力下将由所述单体组成的液体与基本上由多孔网状大分子碱金属或碱土金属组成的固体吸收剂 含有羧酸，磺酸或磷酸基团的阳离子交换树脂的盐，所述阳离子交换树脂的比表面积至少为1平方米/克，孔径为101.3至105埃，并回收纯化的单体。

    Process for the purification of caprolactam
    25.
    发明授权
    Process for the purification of caprolactam 失效
    己内酰胺纯化方法

    公开(公告)号：US3882102A

    公开(公告)日：1975-05-06

    申请号：US40904673

    申请日：1973-10-24

    Applicant: BAYER AG

    Inventor： IMMEL OTTO ,  SCHWARZ HANS-HELMUT

    IPC: C07D201/16 ,  C07D41/06

    CPC classification number: C07D201/16

    Abstract: The invention relates to a process for the purification of caprolactam which is obtained by rearrangement of cyclohexanone oxime in the gas phase in the presence of solid catalysts. The purification takes place by dissolving the crude lactam in benzene or in alkyl benzene with seven to eight carbon atoms and recrystallization whilst cooling.

    Abstract translation: 本发明涉及通过在固相催化剂存在下在气相中重排环己酮肟而得到的己内酰胺的纯化方法。 通过将粗内酰胺溶解在苯或具有7至8个碳原子的烷基苯中并在冷却下重结晶来进行纯化。

    Separation of lactams from a medium coating concentrated sulphuric trioxide in combination with the preparation of phosphate fertilizers
    26.
    发明授权
    Separation of lactams from a medium coating concentrated sulphuric trioxide in combination with the preparation of phosphate fertilizers 失效
    从中等涂层浓缩的三氧化硫与制备磷酸盐肥料的组合中分离纤维素

    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.

    Removal of lactams from a medium which contains concentrated sulphuric acid or sulphur trioxide
    27.
    发明授权
    Removal of lactams from a medium which contains concentrated sulphuric acid or sulphur trioxide 失效
    从含有浓硫酸或三氧化硫的介质中除去纤维素

    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.

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