摘要:
The invention relates to a shaped catalyst body in the form of a tetralobe having four circular through-passages, with the midpoints of the through-passages forming a square and the spacings between in each case two adjacent through-passages being from 0.8 to 1.2 times the thickness of the outer walls of the through-passages. The shaped catalyst body is used for the oxidation of S02 to S03.
摘要:
A hollow cylindrical shaped catalyst body for gas phase oxidation of an alkene to an α,β-unsaturated aldehyde and/or an α,β-unsaturated carboxylic acid comprises a compacted multimetal oxide having an external diameter ED, an internal diameter ID and a height H, wherein ED is in the range from 3.5 to 4.5 mm; the ratio q=ID/ED is in the range from 0.4 to 0.55; and the ratio p=H/ED is in the range from 0.5 to 1. The shaped catalyst body is mechanically stable and catalyzes the partial oxidation of an alkene to the products of value with high selectivity. It provides a sufficiently high catalyst mass density of the catalyst bed and good long-term stability with acceptable pressure drop.
摘要翻译:用于将烯烃气相氧化成α,β-不饱和醛和/或α,β-不饱和羧酸的中空圆柱形催化剂体包括具有外径ED,内径ID的压实多金属氧化物,和 高度H,其中ED在3.5至4.5mm的范围内; 比值q = ID / ED在0.4至0.55的范围内; 并且比例p = H / ED在0.5至1的范围内。成形的催化剂体是机械稳定的并且以高选择性催化烯烃部分氧化成价值的产物。 它提供催化剂床的足够高的催化剂质量密度,并具有良好的长期稳定性和可接受的压降。
摘要:
A process for producing geometric shaped catalyst bodies K whose active material is a multielement oxide of stoichiometry [Bi1WbOx]a[Mo12Z1cZ2dFeeZ3fZ4gZ5hOy]1, in which a finely divided oxide Bi1WbOx with the particle size d50A1 and, formed from element sources, a finely divided intimate mixture of stoichiometry Mo12Z1cZ2dFeeZ3fZ4gZ5h with the particle size d90A2 are mixed in a ratio of a:1, this mixture is used to form shaped bodies and these are treated thermally, where (d50A1)0.7·(d90A2)1.5·(a)−1≧820. A shaped catalyst body obtained by the process. A catalyst obtained by grinding the shaped catalyst body. A process for heterogeneously catalyzing the partial gas phase oxidation of an alkane, alkanol, alkanal and/or an alkenal of 3 to 6 carbon atoms using the catalyst.
摘要翻译:一种生产几何形状的催化剂体K的方法,其活性材料是化学计量[Bi1WbOx] a [Mo12Z1cZ2dFeeZ3fZ4gZ5hOy] 1的多元素氧化物,其中粒径为d50A1的细分的氧化物Bi1WbOx由元素源形成, 化学计量比的混合物Mo12Z1cZ2dFeeZ3fZ4gZ5h与粒径d90A2的混合比例为:1,该混合物用于形成成型体,热处理,其中(d50A1)0.7·(d90A2)1.5·(a)-1≧ 820。 通过该方法获得的成型催化剂体。 通过研磨成形催化剂体获得的催化剂。 使用该催化剂非均相催化烷烃,链烷醇,链烷烃和/或具有3至6个碳原子的烯烃的部分气相氧化的方法。
摘要:
A process for producing geometric shaped catalyst bodies K whose active material is a multielement oxide of stoichiometry [Bi1WbOx]a[Mo12Z1cZ2dFeeZ3fZ4gZ5hOy]1, in which a finely divided oxide Bi1WbOx with the particle size d50A1 and, formed from element sources, a finely divided intimate mixture of stoichiometry Mo12Z1cZ2dFeeZ3fZ4gZ5h with the particle size d90A2 are mixed in a ratio of a:1, this mixture is used to form shaped bodies and these are treated thermally, where (d50A1)0.7·(d90A2)1.5·(a)−1≧820. A shaped catalyst body obtained by the process. A catalyst obtained by grinding the shaped catalyst body. A process for heterogeneously catalyzing the partial gas phase oxidation of an alkane, alkanol, alkanal and/or an alkenal of 3 to 6 carbon atoms using the catalyst.
摘要翻译:一种生产几何形状的催化剂体K的方法,其活性材料是化学计量[Bi1WbOx] a [Mo12Z1cZ2dFeeZ3fZ4gZ5hOy] 1的多元素氧化物,其中具有粒度d50A1的细分离氧化物Bi1WbOx,并且由元素源形成, 化学计量比的混合物Mo12Z1cZ2dFeeZ3fZ4gZ5h以a:1的比例混合,该混合物用于形成成型体,热处理,其中(d50A1)0.7·(d90A2)1.5·(a)-1> = 820。 通过该方法获得的成型催化剂体。 通过研磨成形催化剂体获得的催化剂。 使用该催化剂非均相催化烷烃,链烷醇,链烷烃和/或具有3至6个碳原子的烯烃的部分气相氧化的方法。
摘要:
What is described is a catalyst for preparation of an α,β-unsaturated carboxylic acid by gas phase oxidation of an α,β-unsaturated aldehyde, comprising a shaped support body with an active composition applied thereto, wherein the active composition coverage q q = Q ( 100 - Q ) S m is at most 0.3 mg/mm2, where Q is the active composition content of the catalyst in % by weight and Sm is the specific geometric surface area of the shaped support body in mm2/mg. Also described are a process for preparing the catalyst and a process for preparing an α,β-unsaturated carboxylic acid by gas phase oxidation of an α,β-unsaturated aldehyde over a fixed catalyst bed comprising a bed of the catalyst. The catalyst, with constantly high conversion of acrolein, reduces overoxidation to COx and increases the selectivity of acrylic acid formation.
摘要:
A process for producing a ringlike oxidic shaped body by mechanically compacting a pulverulent aggregate introduced into the fill chamber of a die, wherein the outer face of the resulting compact corresponds to that of a frustocone.
摘要:
The invention relates to shaped catalyst bodies for the oxidation of SO2 to SO3, which comprise vanadium, at least one alkali metal and sulfate on a silicon dioxide support material, wherein the shaped body has the shape of a cylinder having 3 or 4 hollow-cylindrical convexities, obtainable by extrusion of a catalyst precursor composition comprising vanadium, at least one alkali metal and sulfate on a silicon dioxide support material through the opening of an extrusion tool, wherein the opening of the extrusion tool has a cross section formed by 3 or 4 partly overlapping rings whose midpoints lie essentially on a circular line having a diameter of y, wherein the rings are bounded by an outer line lying on a circle having an external diameter x1 and an inner line lying on a circle having an internal diameter x2.
摘要:
A hollow cylindrical shaped catalyst body for gas phase oxidation of an alkene to an α,β-unsaturated aldehyde and/or an α,β-unsaturated carboxylic acid comprises a compacted multimetal oxide having an external diameter ED, an internal diameter ID and a height H, wherein ED is in the range from 3.5 to 4.5 mm; the ratio q=ID/ED is in the range from 0.4 to 0.55; and the ratio p=H/ED is in the range from 0.5 to 1. The shaped catalyst body is mechanically stable and catalyzes the partial oxidation of an alkene to the products of value with high selectivity. It provides a sufficiently high catalyst mass density of the catalyst bed and good long-term stability with acceptable pressure drop.
摘要:
What is described is a catalyst for preparation of an α,β-unsaturated carboxylic acid by gas phase oxidation of an α,β-unsaturated aldehyde, comprising a shaped support body with an active composition applied thereto, wherein the active composition coverage q q = Q ( 100 - Q ) S m is at most 0.3 mg/mm2, where Q is the active composition content of the catalyst in % by weight and Sm is the specific geometric surface area of the shaped support body in mm2/mg. Also described are a process for preparing the catalyst and a process for preparing an α,β-unsaturated carboxylic acid by gas phase oxidation of an α,β-unsaturated aldehyde over a fixed catalyst bed comprising a bed of the catalyst. The catalyst, with constantly high conversion of acrolein, reduces overoxidation to COx and increases the selectivity of acrylic acid formation.
摘要:
A process for producing geometric shaped catalyst bodies K whose active material is a multielement oxide of stoichiometry [Bi1WbOx]a[Mo12Z1cZ2dFeeZ3fZ4gZ5hOy]1, in which a finely divided oxide Bi1WbOx with the particle size d50A1 and, formed from element sources, a finely divided intimate mixture of stoichiometry Mo12Z1cZ2dFeeZ3fZ4gZ5h with the particle size d90A2 are mixed in a ratio of a:1, this mixture is used to form shaped bodies and these are treated thermally, where (d50A1)0.7·(d90A2)1.5·(a)−1≧820. A shaped catalyst body obtained by the process. A catalyst obtained by grinding the shaped catalyst body. A process for heterogeneously catalyzing the partial gas phase oxidation of an alkane, alkanol, alkanal and/or an alkenal of 3 to 6 carbon atoms using the catalyst.
摘要翻译:一种生产几何形状的催化剂体K的方法,其活性材料是化学计量[Bi1WbOx] a [Mo12Z1cZ2dFeeZ3fZ4gZ5hOy] 1的多元素氧化物,其中粒径为d50A1的细分的氧化物Bi1WbOx由元素源形成, 化学计量比的混合物Mo12Z1cZ2dFeeZ3fZ4gZ5h与粒径d90A2的混合比例为:1,该混合物用于形成成型体,热处理,其中(d50A1)0.7·(d90A2)1.5·(a)-1≧ 820。 通过该方法获得的成型催化剂体。 通过研磨成形催化剂体获得的催化剂。 使用该催化剂非均相催化烷烃,链烷醇,链烷烃和/或具有3至6个碳原子的烯烃的部分气相氧化的方法。