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    OPTIMIZED PROCESS FOR SYNTHESIZING METHACRYLIC ACID (MAA) AND/OR ALKYL METHACRYLATE BY REDUCING UNWANTED BYPRODUCTS
    1.
    发明公开
    OPTIMIZED PROCESS FOR SYNTHESIZING METHACRYLIC ACID (MAA) AND/OR ALKYL METHACRYLATE BY REDUCING UNWANTED BYPRODUCTS 审中-公开

    公开(公告)号：US20240010604A1

    公开(公告)日：2024-01-11

    申请号：US18250207

    申请日：2021-10-19

    申请人： Röhm GmbH

    发明人： Steffen Krill ,  Florian Klasovsky ,  Daniel Helmut König ,  Patrick Wings

    IPC分类号： C07C67/20 ,  C07C51/06 ,  C07C67/54 ,  C07C51/44

    CPC分类号： C07C67/20 ,  C07C51/06 ,  C07C67/54 ,  C07C51/44

    摘要： An improved process for synthesizing methacrylic acid and/or alkyl methacrylates, in particular methyl methacrylate (MMA), involves reacting acetone and hydrogen cyanide in the presence of an alkaline catalyst in a first reaction stage such that a first reaction mixture containing acetone cyanohydrin (ACH) is obtained. The process then involves working up the first reaction mixture containing acetone cyanohydrin (ACH), reacting acetone cyanohydrin (ACH) and sulfuric acid in a second reaction stage (amidation), and heating the second reaction mixture in a third reaction stage (conversion), such that methacrylamide (MAA) is obtained. The process further involves hydrolyzing or esterifying methacrylamide (MAA) with water and, optionally, alcohol, preferably water and optionally methanol, in a fourth reaction stage such that methacrylic acid or alkyl methacrylate is formed. The sulfuric acid used has a concentration of 98.0 wt % to 100.0 wt %.

    ESTERIFICATION UNIT FOR PRODUCING CRUDE METHYL METHACRYLATE, ESTERIFICATION PROCESS USING SAID UNIT AND PLANT COMPRISING SAID UNIT
    4.
    发明申请
    ESTERIFICATION UNIT FOR PRODUCING CRUDE METHYL METHACRYLATE, ESTERIFICATION PROCESS USING SAID UNIT AND PLANT COMPRISING SAID UNIT 审中-公开
    用于生产甲基丙烯酸甲酯的制备单元，使用上述单元和包含所述单元的设备的确定过程

    公开(公告)号：US20160257639A1

    公开(公告)日：2016-09-08

    申请号：US15028745

    申请日：2014-10-17

    申请人： ARKEMA FRANCE

    发明人： Yves BERNARDIN ,  Romain BILLON ,  Xavier MARCARIAN ,  Florent VALLET

    IPC分类号： C07C67/20 ,  B01J10/00

    CPC分类号： C07C67/20 ,  B01J4/002 ,  B01J10/00 ,  B01J19/1862 ,  B01J19/2445 ,  B01J19/245 ,  B01J19/2465 ,  B01J2219/0004 ,  C07C69/54

    摘要： The invention relates to an esterification unit (150) and esterification process for producing crude methyl methacrylate (MMA) from methacrylamide (MAM), which enable particularly to improve the yield, meaning that the organics spent acids are low; and at the same time, providing crude MMA with rather good quality, meaning that MMA concentration in crude MMA is rather high and preferably from 50 wt % to 80 wt %. According to the invention, the esterification unit comprises esterification reactors (1, . . . , 5 (or 6) set up in a serial way so that there is a counter current flow between gaseous phase and liquid phase, the liquid phase flowing from first reactor (1) of the series to last reactor (5 (or 6)), and the gaseous phase flowing from reactor to first reactor (1).

    摘要翻译： 本发明涉及由甲基丙烯酰胺（MAM）制备粗甲基丙烯酸甲酯（MMA）的酯化单元（150）和酯化方法，其特别能够提高产率，意味着有机废酸为低; 同时提供质量较好的粗MMA，这意味着粗MMA中的MMA浓度相当高，优选为50wt％至80wt％。 根据本发明，酯化单元包括以串联方式设置的酯化反应器（1，...，5（或6）），使得在气相和液相之间存在逆流，液相从第一 （5（或6））和从反应器流向第一反应器（1）的气相的反应器（1）。

    INSTALLATION AND PROCESS FOR THE PREPARATION OF HYDROGEN CYANIDE
    6.
    发明申请
    INSTALLATION AND PROCESS FOR THE PREPARATION OF HYDROGEN CYANIDE 有权
    氢化氰化物的制备安装和工艺

    公开(公告)号：US20160194212A1

    公开(公告)日：2016-07-07

    申请号：US14905435

    申请日：2014-07-18

    申请人： ARKEMA FRANCE

    发明人： Yves BERNARDIN ,  Xavier MARCARIAN ,  Romain BILLON

    IPC分类号： C01C3/02 ,  C07C253/04 ,  C07C231/12 ,  C07C231/06 ,  C07C51/06 ,  C07C67/20

    CPC分类号： C01C3/0212 ,  C01C3/022 ,  C07C51/06 ,  C07C67/20 ,  C07C231/06 ,  C07C231/12 ,  C07C253/04 ,  Y02P20/129

    摘要： Present invention relates to a process and an installation (100) for the preparation of hydrogen cyanide by the Andrussow process, and more precisely for improving the conditions of mixing the reactant gases before feeding the Andrussow type reactor (60), in order to improve safety, to avoid any risk of explosion and to produce HCN in safe and efficient manner. The installation is configured in such a manner that oxygen is pre-mixed with air with a ratio comprised between 20.95% and 32.5% by volume, preferably between 25% and 30.5% by volume; methane containing gas and ammonia are simultaneously added in the pre-mixture of oxygen-enriched air in such a manner that the volumic ratio of methane to ammonia is comprised between 1.35 and 1.02 depending on the content of oxygen into air; said obtained reactant gases mixture having a temperature comprised between 80° C. and 120° C., preferably between 95° C. and 115° C. for feeding the Andrussow type reactor (60).

    摘要翻译： 本发明涉及一种用于通过Andrussow方法制备氰化氢的方法和装置（100），更准确地说，涉及在提供安德鲁梭型反应器（60）之前改进混合反应气体的条件，以提高安全性 ，以避免任何爆炸的危险，并以安全有效的方式生产HCN。 该装置以这样一种方式配置，使氧与空气预混合，其比例为20.95至32.5％（体积），优选为25％至30.5％（体积）; 含甲烷的气体和氨同时加入到富氧空气的预混合物中，使得甲烷与氨的体积比在1.35和1.02之间，这取决于氧气进入空气的含量; 所述获得的反应气体混合物的温度为80℃至120℃，优选为95℃至115℃，用于供给安德鲁苏型反应器（60）。

    BIOMASS DERIVED METHYL METHACRYLATE AND CORRESPONDING MANUFACURING METHOD, USES AND POLYMERS
    8.
    发明申请
    BIOMASS DERIVED METHYL METHACRYLATE AND CORRESPONDING MANUFACURING METHOD, USES AND POLYMERS 有权
    生物质衍生甲基丙烯酸甲酯和相应的制造方法，用途和聚合物

    公开(公告)号：US20140154758A1

    公开(公告)日：2014-06-05

    申请号：US14175291

    申请日：2014-02-07

    申请人： Camille Croizy ,  PAULINE CROIZY ,  Lucie Campora ,  ARKEMA FRANCE

    发明人： JEAN-LUC DUBOIS ,  Jean Francois Croizy

    IPC分类号： C07C67/22

    CPC分类号： C07C67/22 ,  B32B27/08 ,  B32B27/20 ,  B32B27/30 ,  B32B27/308 ,  B32B2250/24 ,  B32B2419/00 ,  B32B2432/00 ,  B32B2605/00 ,  B32B2605/08 ,  C07B2200/05 ,  C07C67/20 ,  C07C69/54 ,  C08F220/14 ,  Y10T428/139 ,  Y10T428/2998

    摘要： The invention relates to methyl methacrylate characterized in that at least one portion of the carbons thereof is biologically sourced and, more specifically, in that it contains between 0.2×10−10 and 1.2×10−10 wt.-% of 14C in relation to total carbon weight according to the ASTM D6866 standard. The preparation method comprises the use of acetone cyanohydrin as a raw material, said acetone cyanohydrin being obtained by condensing cyanohydric acid on acetone, and the methyl methacrylate is prepared using a process involving the addition of methanol. According to the invention, at least one from among the acetone, cyanohydric acid and methanol is obtained by means of a reaction or series of reactions involving the biomass.

    摘要翻译： 本发明涉及甲基丙烯酸甲酯，其特征在于其至少一部分碳是生物来源的，更具体地说，其含有相对于14C的0.2×10-10和1.2×10-10重量％ 总碳重量符合ASTM D6866标准。 制备方法包括使用丙酮氰醇作为原料，所述丙酮氰醇是通过将氰基羟基在丙酮上缩合得到的，甲基丙烯酸甲酯是通过加入甲醇的方法制备的。 根据本发明，通过涉及生物质的反应或一系列反应获得丙酮，氰基羟基和甲醇中的至少一种。