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1.发明申请公开(公告)号：US20210309598A1
公开(公告)日：2021-10-07
申请号：US17263415
申请日：2019-07-16
Applicant: BASF SE
Inventor： Nicole JANSSEN , Peter ZUROWSKI , Ulrich HAMMON , Sylke HAREMZA
Abstract: Process for inhibiting the undesired free-radical polymerization of acrylic acid present in a liquid phase P, wherein the acrylic acid content of P is at least 10% by weight, the liquid phase P comprises in the range from 25 to 1000 ppmw of glyoxal based on the weight of the acrylic acid present in P and the liquid phase P is admixed with furfural in an amount that results in a furfural content in the range from 25 to 1000 ppmw based on the weight of the acrylic acid present in P. Liquid phase P, wherein the acrylic acid content of P is at least 10% by weight and the liquid phase P comprises in the range from 25 to 1000 ppmw of glyoxal and in the range from 25 to 1000 ppmw of furfural in each case based on the weight of the acrylic acid present in P.
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Patent Agency Ranking
公开(公告)号：US20240343667A1
公开(公告)日：2024-10-17
申请号：US18292359
申请日：2022-07-19
Applicant: BASF SE
Inventor： Tile GIESHOFF , Ulrich HAMMON , Juergen SCHROEDER , Peter ZUROWSKI , Christian REIN , Filip CRAUWELS
CPC classification number: C07C51/252 , C07C51/43
Abstract: A process for preparing acrylic acid, in which heterogeneously catalyzed gas phase partial oxidation of at least one C3 precursor of acrylic acid with molecular oxygen over catalysts in the solid state of matter at elevated temperature affords a product gas mixture comprising acrylic acid, water vapor and secondary components, then the product gas mixture is directed into a condensation column equipped with separating internals, the product gas mixture is allowed to ascend into itself within the condensation column and undergoes fractional condensation, separating the product gas mixture into a bottoms liquid comprising conversion products and secondary components that are higher-boiling than acrylic acid, a crude acrylic acid comprising water and secondary components that have been depleted overall as target product, an acid water still comprising acrylic acid and secondary components, and a residual gas mixture comprising secondary components that are lower-boiling than water, the target product is conducted out of the condensation column via a side draw and the side draw is above the feed point of the product gas mixture into the condensation column, wherein the parts of the condensation column that are in contact with product are made of stainless steel, at least one of the streams of matter fed to the condensation column comprises a source for halide ions, and halide ions are removed in the region of the separating internals of the condensation column above the side draw.
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公开(公告)号：US20230132285A1
公开(公告)日：2023-04-27
申请号：US17913447
申请日：2021-03-18
Applicant: BASF SE
Inventor： Peter ZUROWSKI , Tile GIESHOFF , Nicole JANSSEN
Abstract: Process for inhibiting the undesired free-radical polymerization of acrylic acid present in a liquid phase P, wherein the acrylic acid content of P is at least 10% by weight, the liquid phase P comprises in the range from 25 to 1000 ppmw of glyoxal based on the weight of the acrylic acid present in P and the liquid phase P is admixed with protoanemonine in an amount that results in a protoanemonine content in the range from 0.5 to 100 ppmw based on the weight of the acrylic acid present in P, and a liquid phase P, wherein the acrylic acid content of P is at least 10% by weight and the liquid phase P comprises in the range from 25 to 1000 ppmw of glyoxal and in the range from 0.5 to 100 ppmw of protoanemonine, in each case based on the weight of the acrylic acid present in P.
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公开(公告)号：US20180171035A1
公开(公告)日：2018-06-21
申请号：US15735007
申请日：2016-06-15
Applicant: BASF SE
Inventor： Ann-Kathrin MARGUERRE , Christian RAITH , Christof KUJAT , Friedrich-Georg MARTIN , Daher Michael BADINE , Karolin GEYER , Ansgar SCHAEFER , Nikolaus NESTLE , Murat CETINKAYA , Eduard SCHREINER , Reiner WEILER , Peter ZUROWSKI
CPC classification number: C08F2/42 , C07C51/50 , C08F2/38 , Y02P20/542
Abstract: A composition for the immediate stopping of a free-radical polymerization comprises a) an inhibitor for the free-radical polymerization selected from among phenothiazines, b) an aprotic solvent and c) an ionic liquid. It serves to stabilize free-radically polymerizable monomers against free-radical polymerization. For the immediate stopping of free-radical polymerizations, the composition is added to a free-radically polymerizing system.
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公开(公告)号：US20170189832A1
公开(公告)日：2017-07-06
申请号：US15313688
申请日：2015-04-01
Applicant: BASF SE
Inventor： FRIEDERIKE FLEISCHHAKER , Christian RAITH , Sylke HAREMZA , Peter ZUROWSKI
CPC classification number: B01D17/045 , B05D1/02 , B05D1/18 , B05D3/067 , C02F1/001 , C02F2101/325 , C02F2103/10 , C08F220/18 , C09D4/06 , C09D5/1662 , C10G33/06
Abstract: Process for manufacturing a coated mesh for oil-water separation by coating a mesh with a curable coating composition and crosslinking the coating thereby providing hydrophilic properties to the surface of the mesh, a coated mesh available by said process and the use of such coated mesh for oil-water separation.
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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
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℃。
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