公开(公告)号：US3914313A

公开(公告)日：1975-10-21

申请号：US11895171

申请日：1971-02-25

Applicant: SNIA VISCOSA

Inventor： SIOLI GIANCARLO ,  GIUFFRE LUIGI ,  RIGHI FRANCO ,  MATERA GIANCARLO

IPC: C07D239/42 ,  B01J31/00 ,  C07B61/00 ,  C07C45/00 ,  C07C45/89 ,  C07C49/88 ,  C07C51/00 ,  C07C61/09 ,  C07C67/00 ,  C07D307/89 ,  C07C45/18

CPC classification number: C07C45/89 ,  C07C49/88

Abstract: A method is disclosed for the preparation of alicyclic ketenes, useful as intermediates in the preparation of lactams. The instant method consists in a heat treatment of an alicyclic acid, or its anhydride, in a matallic reactor exempt from nickel, at high temperatures but under subatmospherical pressures. A catalyst of the type XP(OR)3 wherein X is selected from the group consisting of oxygen, sulphur and selenium and R is an alkyl radical is preferred for accelerating the reactions. The temperatures are in the range from 550* to 750*C and the preferred pressure is under 100 millimeters of mercury. High yields and conversion rates are obtained and the purity of the end product is more than satisfactory. The method can be applied to the preparation of a number of alicyclic ketenes.

Abstract translation: 公开了一种制备用作制备内酰胺的中间体的脂环族烯酮的方法。 本方法包括在高温下但在低于大气压的压力下，在不含镍的金属反应器中脂环酸或其酸酐的热处理。 XP（OR）3类型的催化剂，其中X选自氧，硫和硒，R是烷基，用于加速反应。 温度范围为550℃至750℃，优选的压力为100毫米汞柱。 获得高产率和转化率，最终产品的纯度令人满意。 该方法可用于制备多种脂环烯酮。

公开(公告)号：US3912721A

公开(公告)日：1975-10-14

申请号：US37379973

申请日：1973-06-26

Applicant: SNIA VISCOSA

Inventor： MATTONE ROBERTO ,  SIOLI GIANCARLO ,  GIUFFRE LUIGI

IPC: B01D11/04 ,  C07D201/16

CPC classification number: C07D201/16

Abstract: A method is disclosed for recovering lactams from acidic reaction mixtures, the improvement consisting in the fact that the extractant is an alkylsubstituted phenol the alkyl chain of which contains at least three carbon atoms, the alkyl substituent being capable of imparting to the phenol a lipophilic character. Monosubstituted and disubstituted phenols, such as isopropyl phenols, sec. and tert. butyl phenols, sec. and tert. amylphenols, di-sec. amylphenols and di-tert. amylphenols are preferred.

Abstract translation: 公开了一种用于从酸性反应混合物中回收内酰胺的方法，其改进在于提取剂是其烷基链含有至少三个碳原子的烷基取代酚，烷基取代基能够赋予苯酚亲油性 。 单取代和二取代的酚，如异丙基苯酚， 和叔丁基。 丁基酚，秒 和叔丁基。 戊基酚，二 - 戊基酚和二叔丁基。 戊基酚是优选的。

公开(公告)号：US3904609A

公开(公告)日：1975-09-09

申请号：US38033273

申请日：1973-07-18

Applicant: SNIA VISCOSA

Inventor： MATTONE ROBERTO ,  SIOLI GIANCARLO ,  GIUFFRE LUIGI

IPC: B01D3/00 ,  B01D9/02 ,  C07D201/16

CPC classification number: C07D201/16

Abstract: A method for the preparation of pure lactam is disclosed wherein a primary solution of the lactam in an organic phenolic solvent is supplemented by a compound miscible with the solution which is compatible with the primary solvent and is a solvent for the primary solvent but not for the lactam and susceptible of giving rise to precipitation of the lactam, the lactam being then separated from the mixture of the primary solvent and the compound which is a solvent for said primary solvent.