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    Process for the recovery of isoprene from mixtures containing the same
    2.
    发明授权
    Process for the recovery of isoprene from mixtures containing the same 失效
    从含有它的混合物中回收异丙苯的方法

    公开(公告)号：US3860496A

    公开(公告)日：1975-01-14

    申请号：US21354471

    申请日：1971-12-29

    Applicant: SNAM PROGETTI

    Inventor： GINNASI ALESSANDRO ,  RESCALLI CARLO

    IPC: C07C7/08 ,  C07C11/18 ,  B01D3/34

    CPC classification number: C07C7/08 ,  C07C11/18

    Abstract: A multi-stage method is disclosed whereby isoprene of high purity is recovered from mixtures of C5 hydrocarbons containing it, wherein the mixture is subjected to a first extractive distillation stage in the presence of a solvent, such as morpholine and N-formyl-morpholine, containing water and in which olefinic and saturated hydrocarbons are withdrawn as a top product; a second extractive distillation stage effects the withdrawal of the major part of the cyclopentadiene and acetylene compounds present in the bottom product of the first stage as a sidestream and said solvent constitutes a bottom product for recycling to said first and second stage; in a third extractive distillation stage the top product of the second stage is treated with solvent containing water, fed to the third stage from a stripper and then recycled as bottom product to said stripper; and, in a rectification stage, isoprene of desired purity is recovered from the overhead product of the third extractive distillation stage.

    Abstract translation: 公开了一种多级方法，其中从含有它的C5烃的混合物中回收高纯度的异戊二烯，其中混合物在溶剂例如吗啉和N-甲酰基吗啉存在下进行第一萃取蒸馏阶段， 含有水，其中烯属和饱和烃作为顶级产品被取出; 第二萃取蒸馏阶段使作为侧流的第一阶段的底部产物中存在的环戊二烯和乙炔化合物的主要部分退出，并且所述溶剂构成用于再循环到所述第一和第二阶段的底部产物; 在第三萃取蒸馏阶段中，第二阶段的顶部产物用含溶剂的水处理，从汽提塔进料至第三阶段，然后作为底部产物再循环至所述汽提塔; 并且在精馏阶段，从第三萃取蒸馏阶段的塔顶产物中回收所需纯度的异戊二烯。

    Process for the synthesis of urea comprising two separate reaction zones
    4.
    发明公开
    Process for the synthesis of urea comprising two separate reaction zones 失效
    一种用于在两个分开的反应区中的制备尿素的方法过程

    公开(公告)号：EP0751121A3

    公开(公告)日：1998-06-10

    申请号：EP95120367

    申请日：1995-12-21

    Applicant: SNAM PROGETTI

    Inventor： RESCALLI CARLO

    IPC: B01J12/02 ,  C07C273/04 ,  C07C275/00

    CPC classification number: C07C273/04

    Abstract: A process for the synthesis of urea starting from ammonia and carbon dioxide, comprising a reaction step carried out in at least two distinct operating zones basically at the same pressure, but having a different operating temperature, the difference being preferably between 5 and 60 DEG C, and subsequent separation steps of the non-converted reagents, wherein a gaseous stream is transferred from the first zone, at a higher temperature, to the second zone, at a lower temperature, and a liquid stream, containing urea and/or ammonium carbamate, is transferred from the second zone to the first, so that said gaseous stream is preferably at least 5% by weight with respect to the stream effluent from the first zone to the subsequent separation steps. This process allows a ratio urea/(urea+carbamate), in the stream leaving said reaction step, of more than 70%, to be obtained.

    5.
    发明专利
    未知

    公开(公告)号：AT212976T

    公开(公告)日：2002-02-15

    申请号：AT95120367

    申请日：1995-12-21

    Applicant: SNAM PROGETTI

    Inventor： RESCALLI CARLO

    IPC: B01J12/02 ,  C07C273/04 ,  C07C275/00

    Abstract: A process for the synthesis of urea starting from ammonia and carbon dioxide, comprising a reaction step carried out in at least two distinct operating zones basically at the same pressure, but having a different operating temperature, the difference being preferably between 5 and 60 DEG C, and subsequent separation steps of the non-converted reagents, wherein a gaseous stream is transferred from the first zone, at a higher temperature, to the second zone, at a lower temperature, and a liquid stream, containing urea and/or ammonium carbamate, is transferred from the second zone to the first, so that said gaseous stream is preferably at least 5% by weight with respect to the stream effluent from the first zone to the subsequent separation steps. This process allows a ratio urea/(urea+carbamate), in the stream leaving said reaction step, of more than 70%, to be obtained.

    СПОСІБ СИНТЕЗУ СЕЧОВИНИ (ВАРІАНТИ)
    6.
    发明专利
    СПОСІБ СИНТЕЗУ СЕЧОВИНИ (ВАРІАНТИ) 未知

    公开(公告)号：UA43341C2

    公开(公告)日：2001-12-17

    申请号：UA96010030

    申请日：1996-01-03

    Applicant: SNAM PROGETTI

    Inventor： RESCALLI CARLO

    IPC: B01J12/02 ,  C07C273/04 ,  C07C275/00

    Abstract: Спосібсинтезусечовиниз аміакуй двоокисувуглецюз утвореннямкарбаматуамоніюякпроміжногопродуктупроводитьсяз використаннямдвох, зон, щочіткорозрізняються, сполучаютьсяодназ одноюі підтримуютьсяпрактичнопритомусамомутиску. Першафункціонуєпритемпературахвід 170 до 230°Сс утвореннямпершоїрідкоїсумішій другоїпереважногазоподібноїсуміші, щоміститьв основномуаміак, воду, двоокисвуглецюй, можливо, такожінертніпродукти. Другазонафункціонуєприбільшнизькійтемпературі, ніжперша. Тому, принаймні, 5% завагоюдругоїпереважногазоподібноїсумішівідносновагивищезгаданоїпершоїрідкоїсуміші, переноситьсяз першоїзонив другуз наступнимутворенняму нійщеоднієїрідкоїсуміші. Цясумішміститьаміак, карбаматамоніюй, можливо, такожсечовину, якузновупереносятьіздругоїзонив першу.

    7.
    发明专利
    未知

    公开(公告)号：ITMI20000026A1

    公开(公告)日：2001-07-13

    申请号：ITMI20000026

    申请日：2000-01-13

    Applicant: SNAM PROGETTI

    Inventor： SANFILIPPO DOMENICO ,  RESCALLI CARLO ,  PAGGINI ALBERTO ,  MIRACCA IVANO

    IPC: A47C7/28 ,  A47C7/35 ,  A47C23/30 ,  A47C23/32

    Abstract: A frame for seat of stuffed furniture, comprising an essentially flat frame (1) to which, on the upper side, a plurality of parallel belts (5) connecting two opposite sides of the frame, and on the lower side, a plurality of belts (7) at right angle to the preceding, connecting the two other sides, being provided for elastic elements interposed among said belts, just close to the cross areas of the same, are fixed. The frame preferably offers an essentially flat framework consisting of U-shaped metallic structural shapes (2) with the wings facing outwards, with wood-strips (4) inserted into the wings of said U-shaped metallic structural shapes (2), being the belts (5,7) fixed respectively to the upper and lower surface of the strips.

    8.
    发明专利
    未知

    公开(公告)号：AT178591T

    公开(公告)日：1999-04-15

    申请号：AT96101058

    申请日：1996-01-25

    Applicant: SNAM PROGETTI

    Inventor： RESCALLI CARLO

    IPC: C07C273/04 ,  C07C273/16 ,  C07C275/00

    Abstract: Improved yield process for urea synthesis by starting from ammonia and carbon dioxide, comprising a reaction zone under high pressure and temperature conditions, a section wherein a portion of unreacted ammonia and carbon dioxide are stripped and recycled to the reactor, which section operates under substantially the same reactor pressure, and a subsequent section, operating under medium and/or low pressure conditions, for urea purification and simultaneous recovery of residual carbon dioxide and a portion of residual ammonia contained in the effluent stream from the stripping section, as an aqueous solution of ammonium carbamate, in which said aqueous ammonium carbamate solution is either totally or partially fed to said stripping section. Said process makes it possible a conversion of carbon dioxide into urea to be obtained in the reactor which is higher than 70%.

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