Patent number: 5686373
Abstract: Polymetal oxide materials of the general formula I?A!.sub.p ?B!.sub.q (I),where ##STR1## X.sup.1 is W, Nb, Ta, Cr and/or Ce, X.sup.2 is Cu, Ni, Co, Fe, Mn and/or Zn,X.sup.3 is Sb and/or Bi,X.sup.4 is Li, Na, K, Rb, Cs and/or H,X.sup.5 is Mg, Ca, Sr and/or Ba,X.sup.6 is Si, Al, Ti and/or Zr,X.sup.7 is Mo, W, V, Nb and/or Ta,a is from 1 to 8,b is from 0.2 to 5,c is from 0 to 23,d is from 0 to 50,e is from 0 to 2,f is from 0 to 5,g is from 0 to 50,h is from 4 to 30,i is from 0 to 20,x and y are each a number which is determined by the valency and frequency of the elements other than oxygen in I and p and q are non-zero numbers whose ratio p/q is from 160:1 to 1:1,and their use as catalysts.
Type:
Grant
Filed:
February 22, 1995
Date of Patent:
November 11, 1997
Assignee:
BASF Aktiengesellschaft
Inventors:
Andreas Tenten, Friedrich-Georg Martin, Hartmut Hibst, Laszlo Marosi, Veronika Kohl
Patent number: 5559065
Abstract: A coated catalyst is prepared by depositing an alloy by physical vapor deposition and/or chemical vapor deposition on a molding, at least one alloy component being a metal selected from the group consisting of aluminum, gallium, silicon, germanium, tin, lead, bismuth, yttrium, titanium, zirconium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, iron, cobalt, ruthenium, rhodium, palladium, osmium, iridium, platinum, copper, silver, gold and zinc.
Type:
Grant
Filed:
September 14, 1994
Date of Patent:
September 24, 1996
Assignee:
BASF Aktiengesellschaft
Inventors:
Guenter Lauth, Wolfgang Hoelderich, Klaus Harth, Hartmut Hibst