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1.发明公开
公开(公告)号：EP0956158A1
公开(公告)日：1999-11-17
申请号：EP97900999.0
申请日：1997-01-10
IPC分类号： B01J37
CPC分类号： B01J37/0215 , B01J37/0244
摘要： This invention concerns a catalytically active coating applied to a base body, in particular a reaction tube, and a method of applying this catalytically active coating. According to the invention, the coating consists of a laminated composite which at least comprises a base body, an adhesion promoter and a catalytically active cover layer. An adhesion promoter, preferably a metallic adhesion promoter, is applied to a base body, preferably a metal base body, and a catalyst-containing suspension is applied to this adhesion promoter. Advantageously, the composition of the adhesion promoter is at least substantially metallic. Preferably, the adhesion promoter substantially comprises FeCrAl, NiAl and/or NiCrAlY. Coatings in which the catalytically active cover layer contains oxide ceramic catalyst material are suitable. Advantageously, the catalytically active cover layer can comprise metallic oxide hydroxide and/or compounds containing metallic oxide hydroxides and/or metallic oxides and/or compounds which contain metallic oxides and tend to from hydroxides. The catalytically active coating can be applied by sponging, painting, centrifuging, spraying and/or dipping. In particular, a coating in which the suspension is stabilized by a binder or a binder system has proven acceptable. Binders or binder systems which contain metallic oxide hydroxide phosphates and/or metallic salts and/or eutectic compounds which melt at the catalyst operating temperature are suitable. The suspension can further be stabilized by the addition of acids and/or bases in a neutral pH range.
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2.发明公开
公开(公告)号：EP0920355A1
公开(公告)日：1999-06-09
申请号：EP97900592.0
申请日：1997-01-10
CPC分类号： B01J37/0215 , C23C30/00
摘要： The invention concerns a catalytically active coating applied to a base body, in particular a reaction tube, and a method for applying this catalytically active coating. According to the invention, the coating applied to the base body, preferably to a metal base body, comprises at least an auxiliary carrier and a cover layer which contains a catalyst material and has a catalytic effect. A suspension containing a catalyst is applied at least to an auxiliary carrier, preferably a metal auxiliary carrier. Advantageously, at least the auxiliary carrier is coated with the catalytically active cover layer and the coated auxiliary carrier is disposed on the base body. In this respect, the auxiliary carrier can be disposed in a force-locking, frictionally engaged and/or form-locking manner on the base body. The auxiliary carrier can contain a wire, a wire mesh or a wire netting and can in particular comprise a highly heat-resistant heat-conductor wire. Coatings in which the catalytically active cover layer contains oxide ceramic catalyst material are suitable. Advantageously, the catalytically active cover layer can comprise metallic oxide hydroxide and/or compounds containing metallic oxide hydroxides and/or metallic oxides and/or compounds which contain metallic oxides and tend to form hydroxides. The catalytically active coating can be applied by sponging, painting, centrifuging, spraying and/or dipping. In particular, a coating in which the suspension is stabilized by a binder or a binder system has proven acceptable. Binders or binder systems which contain metallic oxide hydroxide phosphates and/or metallic salts and/or eutectic compounds which melt at the catalyst operating temperature are suitable. The suspension can further be stabilized by the addition of acids and/or bases in neutral pH range.
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