METHOD OF SEPARATING OFF MAGNETIZABLE CATALYST PARTICLES BY MEANS OF MAGNETIC FILTERS
    2.
    发明申请
    METHOD OF SEPARATING OFF MAGNETIZABLE CATALYST PARTICLES BY MEANS OF MAGNETIC FILTERS 有权
    通过磁性过滤器分离可磁化催化剂颗粒的方法

    公开(公告)号:US20120172616A1

    公开(公告)日:2012-07-05

    申请号:US13339523

    申请日:2011-12-29

    IPC分类号: C07C255/25 C07C209/84

    摘要: The present invention relates to a process comprising at least the steps (A) chemical reaction of at least one organic compound in the presence of at least one heterogeneous catalyst in a reaction mixture and (B) removal of the at least one heterogeneous catalyst by means of a magnetic filter, and also the use of a magnetic filter for separating off catalyst particles in a process for the hydrogenation of at least one organic compound.

    摘要翻译: 本发明涉及一种方法,其至少包括步骤(A)至少一种有机化合物在至少一种非均相催化剂存在下在反应混合物中的化学反应,和(B)通过手段除去至少一种非均相催化剂 的磁性过滤器,以及在用于氢化至少一种有机化合物的方法中使用磁性过滤器分离催化剂颗粒。

    Production of sodium diformate
    3.
    发明授权
    Production of sodium diformate 有权
    二甲酸钠的生产

    公开(公告)号:US07612233B2

    公开(公告)日:2009-11-03

    申请号:US11913122

    申请日:2006-05-02

    IPC分类号: C07C53/00

    CPC分类号: C07C51/412 C07C53/06

    摘要: The calculation of the above balance shows that the division of stream (5) into the streams (5a) and (5b) used here leads to the fact that in the neutralization stage no excess sodium formate is produced, so that any ejection can be omitted. Furthermore, the water content of the stream (14) comprising sodium formate recirculated to the first crystallization stage in this case can be set to a very low value.

    摘要翻译: 上述平衡的计算表明,流(5)到这里使用的流(5a)和(5b)中的分配导致这样的事实,即在中和阶段不产生过量的甲酸钠,从而可以省略任何喷射 。 此外,在这种情况下,包含再循环到第一结晶阶段的甲酸钠的流(14)的水含量可以被设定为非常低的值。

    Preparation of acrylic acid
    4.
    发明授权
    Preparation of acrylic acid 有权
    丙烯酸的制备

    公开(公告)号:US06939991B2

    公开(公告)日:2005-09-06

    申请号:US10465613

    申请日:2003-06-20

    IPC分类号: C07C51/44 C07C51/16

    CPC分类号: C07C51/44 C07C57/04

    摘要: In a process for preparing acrylic acid, an acrylic acid-containing product gas mixture obtained by catalytic gas phase partial oxidation of a C3 precursor of acrylic acid, after direct cooling with a quench liquid, is fractionally condensed in a separating column provided with internals, rising into itself with sidestream takeoff of crude acrylic acid, and the acrylic acid oligomers which form are dissociated and the resulting dissociation gas is subjected to a countercurrent rectification before it is recycled.

    摘要翻译: 在制备丙烯酸的方法中,通过催化气相部分氧化丙烯酸C 3 N 3前体在用骤冷液体直接冷却后得到的含丙烯酸的产物气体混合物被分级冷凝 在设置有内部件的分离塔中,由于粗丙烯酸的侧流起飞而上升,形成的丙烯酸低聚物被解离,所得的解离气体在再循环之前经受逆流整流。

    Regulation of a wash column in a melt crystallization process
    5.
    发明授权
    Regulation of a wash column in a melt crystallization process 有权
    在熔融结晶过程中调节洗涤柱

    公开(公告)号:US07323016B2

    公开(公告)日:2008-01-29

    申请号:US10333721

    申请日:2001-07-27

    IPC分类号: C30B7/08

    摘要: The present invention relates to the use of an optical line detector for regulating the position of the wash front and/or of the build-up front of the crystal bed of a wash column in a melt crystallization process and a corresponding regulation method. The line detector, for example a CCD camera or a linear array of reflection probes, is arranged in such a way that optical properties of the crystal bed can be detected continuously in a region running parallel to the longitudinal axis of the wash column, this region covering the desired setpoint position of the wash front or of the build-up front.

    摘要翻译: 本发明涉及一种光线路检测器,用于在熔融结晶过程和相应的调节方法中调节洗涤柱的洗涤前沿和/或洗涤塔的积层前沿的位置。 线检测器,例如CCD照相机或反射探针的线性阵列被布置成使得可以在平行于洗涤塔的纵向轴线的区域中连续检测晶体床的光学性质,该区域 覆盖洗涤前部或堆积前部的所需设定点位置。

    Method for producing acrylic acid
    6.
    发明授权
    Method for producing acrylic acid 有权
    制备丙烯酸的方法

    公开(公告)号:US06433222B1

    公开(公告)日:2002-08-13

    申请号:US09764985

    申请日:2001-01-22

    IPC分类号: C07C5142

    CPC分类号: C07C51/43 C07C57/04

    摘要: A process for the preparation of acrylic acid by: (a) preparation of a gaseous product mixture which essentially has the composition of a reaction mixture of catalytic gas-phase oxidation of C3-alkanes, C3-alkenes, C3-alkanols and/or C3-alkanals and/or intermediates thereof to acrylic acid, which comprises (b) condensation of the gaseous product mixture, (c) crystallization of the acrylic acid from the solution obtained in stage (b), with partial evaporation of the solution under reduced pressure, (d) isolation of the resulting crystals from the mother liquor, (e) recycling of at least a part of the mother liquor from stage (d) to stage (b) and (f) recycling of at least a part of the evaporated solution from stage (c) to stage (b).

    摘要翻译: 一种通过以下方法制备丙烯酸的方法:(a)制备气态产物混合物,其基本上具有C3-烷烃,C3-烯烃,C3-链烷醇和/或C3的催化气相氧化反应混合物的组成 - 烷醇和/或其中间体,其包括(b)气态产物混合物的冷凝,(c)丙烯酸从阶段(b)中获得的溶液中的结晶,在减压下部分蒸发溶液 ,(d)从母液中分离得到的晶体,(e)将至少一部分母液从阶段(d)再循环到阶段(b),和(f)将至少一部分蒸发的 从(c)阶段到(b)阶段的方案。

    PROCESS FOR PURIFYING REMOVAL OF A CHEMICAL TARGET COMPOUND FROM A SUSPENSION OF CRYSTALS THEREOF IN MOTHER LIQUOR
    7.
    发明申请
    PROCESS FOR PURIFYING REMOVAL OF A CHEMICAL TARGET COMPOUND FROM A SUSPENSION OF CRYSTALS THEREOF IN MOTHER LIQUOR 有权
    从母体悬浮液中净化化学靶材化合物的方法

    公开(公告)号:US20100206821A1

    公开(公告)日:2010-08-19

    申请号:US12706367

    申请日:2010-02-16

    IPC分类号: B01D33/06

    摘要: A process for purifying removal of a chemical target compound from a suspension of crystals thereof in mother liquor in a wash column with forced transport of the crystal bed from the top downward, in which crystals are removed from the lower end of the crystal bed with a rotating removal device and melted, and a portion of the crystal melt is conducted back toward the crystal bed as wash melt, the removal device being secured with a drive shaft conducted into the wash column from the bottom through an inlet having a seal, said drive shaft being driven about its longitudinal axis by a drive unit for rotation and being mounted so as to be rotatable about its longitudinal axis in more than one bearing, such that the mounting in one of the bearings absorbs the downward force acting on the drive shaft, the mounting in two or more bearings absorbs forces acting radially outward from the drive shaft, and the mounting in one bearing is additionally capable of absorbing an upward force acting on the drive shaft.

    摘要翻译: 一种用于从其晶体悬浮液中清除化学目标化合物从洗涤塔母液中排出的方法,其中从顶部向下将晶体床强制输送,其中晶体从晶体床的下端被除去, 旋转去除装置并熔化,并且一部分晶体熔体作为洗涤熔体被导回到晶体床,所述去除装置通过具有密封件的入口从底部传导到洗涤塔中的驱动轴固定,所述驱动 轴通过用于旋转的驱动单元围绕其纵向轴线被驱动并且被安装成可以在多于一个轴承中围绕其纵向轴线旋转,使得其中一个轴承中的安装吸收作用在驱动轴上的向下的力, 安装在两个或更多个轴承中吸收从驱动轴径向向外作用的力,并且在一个轴承中的安装另外能够吸收作用的向上的力 在驱动轴上。

    Process for separating off fumaric acid and other minor components during the production of maleic anhydride
    9.
    发明授权
    Process for separating off fumaric acid and other minor components during the production of maleic anhydride 有权
    在马来酸酐生产过程中分离富马酸和其他次要成分的方法

    公开(公告)号:US08476463B2

    公开(公告)日:2013-07-02

    申请号:US12935894

    申请日:2009-03-23

    IPC分类号: C07D307/36 C07D307/34

    CPC分类号: C07C51/573 C07C57/145

    摘要: Processes for decreasing fumaric acid deposits in preparing maleic anhydride by heterogeneously catalyzed oxidation of a hydrocarbon with molecular oxygen. Maleic anhydride is absorbed from the crude mixture in an absorbent in an absorption column and desorbed in a desorption column, the entirety or portion of absorbent depleted in maleic anhydride, for controlled precipitation of fumaric acid, being cooled and/or concentrated by evaporating a portion of absorbent such that the difference between the concentration of fumaric acid in the recycle stream at the outlet of the desorption column under existing conditions and the equilibrium concentration of fumaric acid according to the solubility curve after cooling and/or evaporation of a portion of absorbent is ≧250 ppm by weight, and the fumaric acid precipitated as a solid is removed completely or partly from the absorbent recycling system and the fumaric acid-depleted absorbent is recycled completely or partly to the absorption column.

    摘要翻译: 通过用分子氧异构催化氧化烃来减少富马酸沉积物制备​​马来酸酐的方法。 马来酸酐在吸收塔中的吸收剂中从粗混合物中吸收并在解吸塔中解吸,耗尽马来酸酐的全部或部分吸收剂用于控制富马酸的沉淀,通过蒸发一部分而被冷却和/或浓缩 的吸收剂,使得在现有条件下在解吸塔出口处的再循环料流中的富马酸浓度与部分吸收剂冷却和/或蒸发后根据溶解度曲线的平均浓度的富马酸的差异是 > 250ppm(重量),并且作为固体沉淀的富马酸被完全或部分地从吸收剂再循环系统中除去,富马酸贫乏的吸收剂被完全或部分地再循环到吸收塔。