公开(公告)号：US20140135523A1

公开(公告)日：2014-05-15

申请号：US14038972

申请日：2013-09-27

Applicant: BASF SE

Inventor： Ulrich JAEGER ,  Volker SCHLIEPHAKE ,  Ortmund LANG ,  Jochen PETZOLDT ,  Tobias Johannes KORN ,  Virginie BETTE ,  Claus HECHLER

IPC: C07C67/28 ,  C07C67/62

CPC classification number: C07C67/62 ,  C07C67/08 ,  C07C67/54 ,  C07C69/52 ,  C07C69/54

Abstract: A continuous process for preparing (meth)acrylates of C10-alcohol mixtures by reaction of glacial (meth)acrylic acid with an isomer mixture of C10-alcohols composed of 2-propylheptanol as the main isomer and at least one of the C10-alcohols 2-propyl-4-methylhexanol, 2-propyl-5-methylhexanol, 2-isopropylheptanol, 2-isopropyl-4-methylhexanol, 2-isopropyl-5-methylhexanol and/or 2-propyl-4,4-dimethylpentanol, and the use of a diester of dicarboxylic acids which have been esterified with N-oxyl-containing compounds as polymerization inhibitors in such a process.

Abstract translation: 通过冰（甲基）丙烯酸与由2-丙基庚醇组成的C 10醇作为主要异构体的异构体混合物和至少一种C 10醇2来制备C10-醇混合物的（甲基）丙烯酸酯的连续方法 丙基-4-甲基己醇，2-丙基-5-甲基己醇，2-异丙基庚醇，2-异丙基-4-甲基己醇，2-异丙基-5-甲基己醇和/或2-丙基-4,4-二甲基戊醇， 的二羧酸二酯在这种方法中被N-氧基化合物酯化作为聚合抑制剂。

公开(公告)号：US20170036982A1

公开(公告)日：2017-02-09

申请号：US15227392

申请日：2016-08-03

Applicant: BASF SE

Inventor： Tobias KORN ,  Till BLUM ,  Travis CARLINE ,  Christopher FUCHS ,  Darryl WELCH ,  Peter ZUROWSKI ,  Volker SCHLIEPHAKE ,  Steffen RISSEL ,  Thorsten FRIESE ,  Ulrich JAEGER ,  Sylke HAREMZA

IPC: C07C45/32 ,  C07C45/82 ,  C07C45/79

CPC classification number: C07C45/32 ,  C07C45/33 ,  C07C45/35 ,  C07C45/38 ,  C07C45/39 ,  C07C45/783 ,  C07C51/21 ,  C07C51/235 ,  C07C51/245 ,  C07C51/252 ,  C07C51/42 ,  C07C51/43 ,  C07C51/44 ,  C07C51/47 ,  C07C57/04

Abstract: The invention is related to a process for production of acrylic acid comprising the following steps: a) preparation of a product gas mixture by a catalytic gas-phase oxidation of at least one C3 precursor compound to acrylic acid, wherein acrylic acid is formed as a main product of the catalytic gas-phase oxidation and glyoxal is formed as a by-product and the product gas mixture comprises acrylic acid and glyoxal, b) cooling of the product gas mixture, c) contacting the product gas mixture in countercourrent with an absorbent, wherein an absorbate A, comprising the absorbent and absorbed acrylic acid, is formed, d) introducing a feed stream F (2) comprising at least part of the absorbate A into a rectification column comprising a rectifying section and a stripping section, e) enriching the absorbent in the stripping section and enriching acrylic acid in the rectifying section, f) withdrawing a stream C of crude acrylic acid comprising at least 90% by weight of acrylic acid out of the rectifying section as a side stream, wherein step c) is carried out in an absorption column (12) comprising at least two cooling loops, a first cooling loop (14), wherein a high boiler fraction of the product gas mixture is condensed and a second cooling loop (16), wherein a low boiler fraction of the product gas mixture is condensed, wherein a portion of the absorbate A, which comprises the feed stream F (2), is removed from the absorption column (12) at a side take-off (20), the side take-off (20) being located at the first cooling loop (14) or at a height of the absorption column (12) between the first cooling loop (14) and the second cooling loop (16) and wherein a temperature Tc of the absorbate A in the second cooling loop is at least 56° C.

Abstract translation: 本发明涉及一种生产丙烯酸的方法，包括以下步骤：a）通过至少一种C3前体化合物的催化气相氧化制备产物气体混合物至丙烯酸，其中丙烯酸形成为 作为副产物形成催化气相氧化和乙二醛的主要产物，产物气体混合物包括丙烯酸和乙二醛，b）冷却产物气体混合物，c）将产物气体混合物与吸附剂 ，其中形成包含吸收和吸收的丙烯酸的吸收剂A，d）将包含至少一部分吸收剂A的进料流F（2）引入到包括精馏段和汽提段的蒸馏塔中，e）富集 汽提段中的吸收剂和精馏段中的富集丙烯酸，f）将粗丙烯酸流C包含至少90％（重量）的丙烯酸 其中步骤c）在包括至少两个冷却回路的吸收塔（12）中进行，第一冷却回路（14），其中产物气体混合物的高沸点馏分冷凝，和 第二冷却回路（16），其中产物气体混合物的低沸点馏分冷凝，其中包含进料流F（2）的吸收剂A的一部分在吸收塔（12）的一侧被去除 起落架（20），侧向起飞（20）位于第一冷却回路（14）处或位于第一冷却回路（14）和第二冷却回路（14）的吸收塔（12）的高度处 16），其中第二冷却回路中的吸收剂A的温度（Tc）至少为56℃。