Process for continuously removing a target product X in the form of fine crystals
    44.
    发明授权
    Process for continuously removing a target product X in the form of fine crystals 有权
    连续除去细晶体形式的目标产物X的方法

    公开(公告)号:US07999120B2

    公开(公告)日:2011-08-16

    申请号:US12209594

    申请日:2008-09-12

    IPC分类号: C07D227/00 C07C51/43 C07C7/14

    摘要: A process for continuously removing a target product X in the form of fine crystals from a liquid phase P comprising the target product X and constituents other than the target product X by cooling suspension crystallization in the secondary chamber, into which the liquid phase P flows continuously, of an indirect heat exchanger with simultaneous continuous flow of a coolant through the primary chamber of the indirect heat exchanger and continuous withdrawal of a crystal suspension S having a degree of crystallization Y from the secondary chamber, in which the degree of crystallization Y is adjusted on the basis of a heat balance conducted continuously with the aid of a process computer.

    摘要翻译: 从液相P连续除去来自包含目标产物X的液相P和除了目标产物X以外的成分的微晶形式的目标产物X的方法,通过冷却液相P连续流入的二次室中的悬浮液结晶 的间接热交换器,其通过间接热交换器的主室同时连续流动冷却剂,并且从二级室连续取出具有结晶度Y的晶体悬浮液S,其中结晶度Y被调节 基于在过程计算机的帮助下连续进行的热平衡。

    PROCESS FOR STARTING UP A SEPARATING PROCESS FOR PURIFYING REMOVAL OF ACRYLIC ACID CRYSTALS FROM A SUSPENSION S OF CRYSTALS THEREOF IN MOTHER LIQUOR
    45.
    发明申请
    PROCESS FOR STARTING UP A SEPARATING PROCESS FOR PURIFYING REMOVAL OF ACRYLIC ACID CRYSTALS FROM A SUSPENSION S OF CRYSTALS THEREOF IN MOTHER LIQUOR 有权
    启动分离工艺的方法,用于净化丙烯酸晶体从其母液中的晶体悬浮液中除去

    公开(公告)号:US20110124834A1

    公开(公告)日:2011-05-26

    申请号:US12897199

    申请日:2010-10-04

    IPC分类号: C08F20/06 C07C51/42

    CPC分类号: C07C51/43 C07C51/47 C07C57/04

    摘要: A process for starting up a separating process for purifying removal of acrylic acid crystals from a suspension S of crystals thereof in mother liquor with a hydraulic wash column which has a crystal melt circuit including crystal melt space, and a process space and a distributor space which are separated by an end with passages connecting the two spaces, in which the crystal bed is formed for the first time by first filling the crystal melt circuit and, at least partly, the process space with an acrylic acid-comprising startup liquid whose acrylic acid crystal formation temperature is less than or equal to the temperature of the suspension S increased by 15° C., and then continuing the filling of the wash column with the suspension S and optionally with control liquor until the difference between the pressure in the crystal melt space and the pressure in the distributor space falls suddenly, the arithmetic mean of the total waste liquor flow flowing through the filters of the filter tubes of the wash column until this time, based on the area of all filters, being not more than 80 m3/(m2·h).

    摘要翻译: 一种用于利用具有包括晶体熔融空间的晶体熔融回路的液压洗涤柱从母液中的晶体悬浮液S中纯化除去丙烯酸晶体的分离过程的工艺,以及工艺空间和分配器空间, 通过连接两个空间的通道分开一端,其中通过首先填充晶体熔融回路并且至少部分地与包含丙烯酸的启动液体的工艺空间首次形成晶体床,其中丙烯酸 晶体形成温度小于或等于悬浮液S的温度升高15℃,然后用悬浮液S和任选地与对照液体继续填充洗涤柱,直到晶体熔体中的压力差 空间和分配器空间中的压力突然下降,流过滤器过滤器的总废液流的算术平均值 根据所有过滤器的面积,直到此时为止,洗涤塔的管子不超过80立方米/(m2·h)。

    Method for carrying out the catalytic gas phase oxidation of propene to form acrylic acid
    49.
    发明授权
    Method for carrying out the catalytic gas phase oxidation of propene to form acrylic acid 失效
    进行催化气相氧化丙烯以形成丙烯酸的方法

    公开(公告)号:US06740779B1

    公开(公告)日:2004-05-25

    申请号:US10110227

    申请日:2002-04-22

    IPC分类号: C07C5702

    CPC分类号: C07C51/25 C07C57/04

    摘要: In a process for the two-stage catalytic gas-phase oxidation of propene to acrylic acid, the reaction gas starting mixture is passed, in a tube-bundle reactor, with a propene loading of ≧160 l (S.T.P.) of propene/l·h, first over a fixed catalyst bed 1 present in two successive temperature zones A, B and then over a fixed catalyst bed 2 which is housed either in one further temperature zone C or in two further temperature zones D, E, the temperature of the zone A being kept at a lower temperature than the zone B and the temperature of the zone D at a lower temperature than the zone E.

    摘要翻译: 在将丙烯二阶段催化气相氧化成丙烯酸的过程中,将反应气体起始混合物在管束反应器中以丙烯/丙烯的加入量为约160l(STP)/ 1h 首先在存在于两个连续的温度区域A,B中的固定的催化剂床1上,然后在固定的催化剂床2上,该固定的催化剂床2容纳在一个另外的温度区域C或两个另外的温度区域D,E中, A在比区域B低的温度下保持在比区域B低的温度和区域D的温度。