PROCESS FOR PREPARING ACRYLIC ACID
    21.
    发明申请
    PROCESS FOR PREPARING ACRYLIC ACID 有权
    制备丙烯酸的方法

    公开(公告)号:US20080183014A1

    公开(公告)日:2008-07-31

    申请号:US12020264

    申请日:2008-01-25

    IPC分类号: C07C51/487

    CPC分类号: C07C51/44 C07C51/48 C07C57/04

    摘要: A process for preparing acrylic acid, in which an acrylic acid-comprising product gas mixture obtained by catalytic gas phase partial oxidation of a C3 precursor of acrylic acid is fractionally condensed in a condensation column provided with internals ascending into itself with side draw removal of crude acrylic acid and with liquid phase draw removal of acrylic acid-comprising acid water, and acrylic acid present in acid water is taken up into an extractant and then removed from the extractant and recycled into the condensation column, or taken up in aqueous metal hydroxide, or sent to further purification of the crude acrylic acid.

    摘要翻译: 制备丙烯酸的方法,其中通过丙烯酸C 3/3前体的催化气相部分氧化获得的含丙烯酸的产物气体混合物在具有内部升降的冷凝塔中分级冷凝 用丙烯酸粗抽出去除丙烯酸的酸性水,并将存在于酸性水中的丙烯酸吸收到萃取剂中,然后从萃取剂中除去并再循环到冷凝塔中, 或吸收在金属氢氧化物水溶液中,或者进一步纯化粗丙烯酸。

    Method for the rectifying separation of fluids containing (meth)acryl monomers
    24.
    发明授权
    Method for the rectifying separation of fluids containing (meth)acryl monomers 有权
    含有(甲基)丙烯酸单体的流体的精馏分离方法

    公开(公告)号:US07520964B2

    公开(公告)日:2009-04-21

    申请号:US10515639

    申请日:2003-07-02

    IPC分类号: B01D3/22 B01D3/32

    摘要: A process for rectificatively separating at least one (meth)acrylic monomer-containing fluid by feeding the fluid into a rectification column containing at least one sieve tray without a runoff segment, wherein an elementary cell is obtained from a number of centers of passages in a sieve tray, and the cell shifts regularly and repeatedly along its edges, the lengths of two shifting vectors being the lengths of the edges of the cell along which the shifting is effected; an arrangement of the centers is such that the positions of an ideal center and a real center are separated by ≦1% of half of the sum of the lengths of the two shifting vectors; and an arrangement of the passages is such that the sum of non-overlapping surface areas of an ideal passage with a real passage and vice versa is ≦1% of the surface area of the ideal passage.

    摘要翻译: 将含有至少一种(甲基)丙烯酸系单体的流体通过将流体供给至含有至少一个不具有径流段的多孔塔的精馏塔的方法,其中从多个通道中心获得基本单元, 筛板,并且单元沿其边缘规则地且重复地移动,两个移动向量的长度是实现移位的单元的边缘的长度; 中心的布置使得理想中心和实心的位置被两个移位矢量的长度之和的一半的<= 1%分开; 并且通道的布置使得理想通道的非重叠表面面积与实际通道的总和相反,<=理想通道的表面积的1%。

    Removal of solids from tubes of a tube bundle heat exchanger
    26.
    发明申请
    Removal of solids from tubes of a tube bundle heat exchanger 审中-公开
    从管束热交换器的管中去除固体

    公开(公告)号:US20050109377A1

    公开(公告)日:2005-05-26

    申请号:US10989277

    申请日:2004-11-17

    摘要: The invention described herein relates to a process for removing solids from tubes of a tube bundle heat exchanger, wherein a drill driven by a drilling machine is inserted into a tube of the tube bundle heat exchanger and clears out solids present in the tube. In a first variant of the process according to the invention, the drill is a spiral drill and has, cut out in the outer casing of the drill, a spiral conveyor groove in which the solids particles loosened and isolated by the drill tip on insertion of the drill into the tube can be transported out of the tube. More preferably, the drill is a hollow drill 10 which is provided with a substantially circular drill tip 11 and has a central recess running along the rotational axis in the longitudinal direction of the drill and opening into the drill tip 11 at the free end of the drill. At the drill tip 11 are provided toothlike projections 12.

    摘要翻译: 本文所述的本发明涉及从管束热交换器的管中除去固体的方法,其中由钻机驱动的钻头插入管束热交换器的管中并清除管中存在的固体。 在根据本发明的方法的第一变型中,钻头是螺旋钻,并且在钻头的外壳中切出螺旋输送槽,在该螺旋输送槽中固体颗粒在钻头插入时由钻头松动和隔离 钻进管子可以被运送出管。 更优选地,钻头是中空钻机10,其设置有基本上圆形的钻头11,并且具有在钻头的纵向方向上沿着旋转轴线延伸的中心凹部,并在钻头的自由端处开入钻头尖端11 钻头。 在钻尖11处设有齿状突起12。

    Process for preparing acrylic acid
    29.
    发明授权
    Process for preparing acrylic acid 有权
    制备丙烯酸的方法

    公开(公告)号:US07566804B2

    公开(公告)日:2009-07-28

    申请号:US12020264

    申请日:2008-01-25

    IPC分类号: C07C51/42 C07C51/16

    CPC分类号: C07C51/44 C07C51/48 C07C57/04

    摘要: A process for preparing acrylic acid, in which an acrylic acid-comprising product gas mixture obtained by catalytic gas phase partial oxidation of a C3 precursor of acrylic acid is fractionally condensed in a condensation column provided with internals ascending into itself with side draw removal of crude acrylic acid and with liquid phase draw removal of acrylic acid-comprising acid water, and acrylic acid present in acid water is taken up into an extractant and then removed from the extractant and recycled into the condensation column, or taken up in aqueous metal hydroxide, or sent to further purification of the crude acrylic acid.

    摘要翻译: 制备丙烯酸的方法,其中通过丙烯酸的C3前体的催化气相部分氧化获得的含丙烯酸的产物气体混合物在冷凝塔中分级冷凝,所述内部装有自身上升的侧向抽出粗品 丙烯酸和含丙烯酸的酸性水的液相萃取和酸性水中存在的丙烯酸被吸收到萃取剂中,然后从萃取剂中除去并循环到冷凝柱中,或者被吸收在金属氢氧化物水溶液中, 或者进一步纯化粗丙烯酸。