EP1326709A1 - Verfahren zur herstellung von platinmetall-katalysatoren duch stromlose abscheidung und deren verwendung zur direktsynthese von wasserstoffperoxid - Google Patents
Verfahren zur herstellung von platinmetall-katalysatoren duch stromlose abscheidung und deren verwendung zur direktsynthese von wasserstoffperoxidInfo
- Publication number
- EP1326709A1 EP1326709A1 EP01969806A EP01969806A EP1326709A1 EP 1326709 A1 EP1326709 A1 EP 1326709A1 EP 01969806 A EP01969806 A EP 01969806A EP 01969806 A EP01969806 A EP 01969806A EP 1326709 A1 EP1326709 A1 EP 1326709A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- catalyst
- carrier
- platinum metal
- metal
- platinum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 127
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 title claims abstract description 127
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 36
- 239000002184 metal Substances 0.000 title claims abstract description 36
- 230000008021 deposition Effects 0.000 title claims abstract description 20
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 title claims description 50
- 230000015572 biosynthetic process Effects 0.000 title claims description 18
- 238000003786 synthesis reaction Methods 0.000 title claims description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 40
- 150000003839 salts Chemical class 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims description 63
- 239000012736 aqueous medium Substances 0.000 claims description 39
- 239000000203 mixture Substances 0.000 claims description 37
- 239000011521 glass Substances 0.000 claims description 29
- 229910052739 hydrogen Inorganic materials 0.000 claims description 24
- 239000001257 hydrogen Substances 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 23
- 238000000576 coating method Methods 0.000 claims description 22
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 238000000151 deposition Methods 0.000 claims description 19
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 18
- 239000011248 coating agent Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 16
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 12
- 239000011707 mineral Substances 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 11
- 239000003446 ligand Substances 0.000 claims description 11
- 238000005984 hydrogenation reaction Methods 0.000 claims description 10
- 238000002459 porosimetry Methods 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 10
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 7
- 229910052753 mercury Inorganic materials 0.000 claims description 7
- 150000002894 organic compounds Chemical class 0.000 claims description 7
- 150000002484 inorganic compounds Chemical class 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 239000002609 medium Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 3
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 3
- 238000010531 catalytic reduction reaction Methods 0.000 claims description 3
- 229910010272 inorganic material Inorganic materials 0.000 claims description 3
- 239000002923 metal particle Substances 0.000 claims description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 2
- 150000002431 hydrogen Chemical class 0.000 claims description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 230000000536 complexating effect Effects 0.000 claims 1
- 229910001882 dioxygen Inorganic materials 0.000 claims 1
- -1 platinum group metal compound Chemical class 0.000 abstract description 44
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 2
- 239000011733 molybdenum Substances 0.000 abstract description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052721 tungsten Inorganic materials 0.000 abstract description 2
- 239000010937 tungsten Substances 0.000 abstract description 2
- 229910052758 niobium Inorganic materials 0.000 abstract 1
- 239000010955 niobium Substances 0.000 abstract 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 abstract 1
- 229910052715 tantalum Inorganic materials 0.000 abstract 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 abstract 1
- 229910052720 vanadium Inorganic materials 0.000 abstract 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 abstract 1
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 64
- 239000000243 solution Substances 0.000 description 44
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 36
- 229910052763 palladium Inorganic materials 0.000 description 32
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 31
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 29
- 229910052697 platinum Inorganic materials 0.000 description 28
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 24
- 239000002253 acid Substances 0.000 description 21
- 239000007789 gas Substances 0.000 description 20
- 229910021529 ammonia Inorganic materials 0.000 description 18
- 229920001577 copolymer Polymers 0.000 description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 15
- 239000002585 base Substances 0.000 description 13
- 239000008139 complexing agent Substances 0.000 description 13
- 239000000126 substance Substances 0.000 description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- 235000019270 ammonium chloride Nutrition 0.000 description 12
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 11
- 238000004458 analytical method Methods 0.000 description 11
- 239000011734 sodium Substances 0.000 description 11
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 11
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 229910052783 alkali metal Inorganic materials 0.000 description 10
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 10
- 229920000642 polymer Polymers 0.000 description 10
- 229910052708 sodium Inorganic materials 0.000 description 10
- 239000004952 Polyamide Substances 0.000 description 9
- 150000001340 alkali metals Chemical class 0.000 description 9
- 229920002647 polyamide Polymers 0.000 description 9
- ABKQFSYGIHQQLS-UHFFFAOYSA-J sodium tetrachloropalladate Chemical compound [Na+].[Na+].Cl[Pd+2](Cl)(Cl)Cl ABKQFSYGIHQQLS-UHFFFAOYSA-J 0.000 description 9
- 239000005062 Polybutadiene Substances 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 8
- 239000004744 fabric Substances 0.000 description 8
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 7
- 229910000510 noble metal Inorganic materials 0.000 description 7
- 229920002857 polybutadiene Polymers 0.000 description 7
- 239000012429 reaction media Substances 0.000 description 7
- 229910052718 tin Inorganic materials 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 6
- 150000007513 acids Chemical class 0.000 description 6
- 239000000969 carrier Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 6
- 239000004700 high-density polyethylene Substances 0.000 description 6
- 150000002739 metals Chemical class 0.000 description 6
- 229910052755 nonmetal Inorganic materials 0.000 description 6
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 6
- 238000005086 pumping Methods 0.000 description 6
- 239000012495 reaction gas Substances 0.000 description 6
- 238000007788 roughening Methods 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 5
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 5
- 150000001342 alkaline earth metals Chemical class 0.000 description 5
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 5
- 229920001903 high density polyethylene Polymers 0.000 description 5
- 229920001684 low density polyethylene Polymers 0.000 description 5
- 239000004702 low-density polyethylene Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 150000002843 nonmetals Chemical class 0.000 description 5
- 239000003960 organic solvent Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229910052700 potassium Inorganic materials 0.000 description 5
- 239000011591 potassium Substances 0.000 description 5
- 235000012239 silicon dioxide Nutrition 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- QXJJQWWVWRCVQT-UHFFFAOYSA-K calcium;sodium;phosphate Chemical compound [Na+].[Ca+2].[O-]P([O-])([O-])=O QXJJQWWVWRCVQT-UHFFFAOYSA-K 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 150000001993 dienes Chemical class 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 229910052736 halogen Inorganic materials 0.000 description 4
- 150000002367 halogens Chemical class 0.000 description 4
- 229910052741 iridium Inorganic materials 0.000 description 4
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 4
- 150000002940 palladium Chemical class 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 239000010948 rhodium Substances 0.000 description 4
- 229910052703 rhodium Inorganic materials 0.000 description 4
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 4
- 239000012279 sodium borohydride Substances 0.000 description 4
- 229910000033 sodium borohydride Inorganic materials 0.000 description 4
- SJEBAWHUJDUKQK-UHFFFAOYSA-N 2-ethylanthraquinone Chemical compound C1=CC=C2C(=O)C3=CC(CC)=CC=C3C(=O)C2=C1 SJEBAWHUJDUKQK-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 3
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 3
- 101100242031 Mus musculus Pdha2 gene Proteins 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 3
- 229910021626 Tin(II) chloride Inorganic materials 0.000 description 3
- 150000001299 aldehydes Chemical class 0.000 description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 3
- 150000003863 ammonium salts Chemical class 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical class OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 3
- 150000001735 carboxylic acids Chemical class 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- UAOMVDZJSHZZME-UHFFFAOYSA-N diisopropylamine Chemical compound CC(C)NC(C)C UAOMVDZJSHZZME-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 229920000570 polyether Polymers 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 229920006216 polyvinyl aromatic Polymers 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 229910052707 ruthenium Inorganic materials 0.000 description 3
- 239000005361 soda-lime glass Substances 0.000 description 3
- 235000011150 stannous chloride Nutrition 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- AXZWODMDQAVCJE-UHFFFAOYSA-L tin(II) chloride (anhydrous) Chemical compound [Cl-].[Cl-].[Sn+2] AXZWODMDQAVCJE-UHFFFAOYSA-L 0.000 description 3
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 3
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- RGHNJXZEOKUKBD-SQOUGZDYSA-N D-gluconic acid Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 2
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- PEEHTFAAVSWFBL-UHFFFAOYSA-N Maleimide Chemical compound O=C1NC(=O)C=C1 PEEHTFAAVSWFBL-UHFFFAOYSA-N 0.000 description 2
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 description 2
- NQRYJNQNLNOLGT-UHFFFAOYSA-N Piperidine Chemical compound C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 description 2
- 229920002367 Polyisobutene Polymers 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 229920001807 Urea-formaldehyde Polymers 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 235000011054 acetic acid Nutrition 0.000 description 2
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
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- DJEHXEMURTVAOE-UHFFFAOYSA-M potassium bisulfite Chemical compound [K+].OS([O-])=O DJEHXEMURTVAOE-UHFFFAOYSA-M 0.000 description 1
- KYKNRZGSIGMXFH-ZVGUSBNCSA-M potassium bitartrate Chemical compound [K+].OC(=O)[C@H](O)[C@@H](O)C([O-])=O KYKNRZGSIGMXFH-ZVGUSBNCSA-M 0.000 description 1
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- YBCAZPLXEGKKFM-UHFFFAOYSA-K ruthenium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Ru+3] YBCAZPLXEGKKFM-UHFFFAOYSA-K 0.000 description 1
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- JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 description 1
- SCIDDAJGEVMVDO-UHFFFAOYSA-M sodium hydrogen dithionite Chemical compound [Na+].OS(=O)S([O-])=O SCIDDAJGEVMVDO-UHFFFAOYSA-M 0.000 description 1
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- 235000011004 sodium tartrates Nutrition 0.000 description 1
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- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- YBRBMKDOPFTVDT-UHFFFAOYSA-N tert-butylamine Chemical compound CC(C)(C)N YBRBMKDOPFTVDT-UHFFFAOYSA-N 0.000 description 1
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- YONPGGFAJWQGJC-UHFFFAOYSA-K titanium(iii) chloride Chemical compound Cl[Ti](Cl)Cl YONPGGFAJWQGJC-UHFFFAOYSA-K 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 150000004901 trioxanes Chemical class 0.000 description 1
- YFTHZRPMJXBUME-UHFFFAOYSA-N tripropylamine Chemical compound CCCN(CCC)CCC YFTHZRPMJXBUME-UHFFFAOYSA-N 0.000 description 1
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- PENRVBJTRIYHOA-UHFFFAOYSA-L zinc dithionite Chemical compound [Zn+2].[O-]S(=O)S([O-])=O PENRVBJTRIYHOA-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/03—Precipitation; Co-precipitation
- B01J37/031—Precipitation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/42—Platinum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/62—Platinum group metals with gallium, indium, thallium, germanium, tin or lead
- B01J23/622—Platinum group metals with gallium, indium, thallium, germanium, tin or lead with germanium, tin or lead
- B01J23/626—Platinum group metals with gallium, indium, thallium, germanium, tin or lead with germanium, tin or lead with tin
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- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/64—Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
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- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/186—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
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- B01J37/02—Impregnation, coating or precipitation
- B01J37/0201—Impregnation
- B01J37/0207—Pretreatment of the support
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B15/00—Peroxides; Peroxyhydrates; Peroxyacids or salts thereof; Superoxides; Ozonides
- C01B15/01—Hydrogen peroxide
- C01B15/029—Preparation from hydrogen and oxygen
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- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B35/00—Reactions without formation or introduction of functional groups containing hetero atoms, involving a change in the type of bonding between two carbon atoms already directly linked
- C07B35/02—Reduction
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- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/17—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrogenation of carbon-to-carbon double or triple bonds
- C07C29/172—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrogenation of carbon-to-carbon double or triple bonds with the obtention of a fully saturated alcohol
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- C07C37/06—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by conversion of non-aromatic six-membered rings or of such rings formed in situ into aromatic six-membered rings, e.g. by dehydrogenation
- C07C37/07—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by conversion of non-aromatic six-membered rings or of such rings formed in situ into aromatic six-membered rings, e.g. by dehydrogenation with simultaneous reduction of C=O group in that ring
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1635—Composition of the substrate
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1655—Process features
- C23C18/166—Process features with two steps starting with addition of reducing agent followed by metal deposition
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/1851—Pretreatment of the material to be coated of surfaces of non-metallic or semiconducting in organic material
- C23C18/1872—Pretreatment of the material to be coated of surfaces of non-metallic or semiconducting in organic material by chemical pretreatment
- C23C18/1875—Pretreatment of the material to be coated of surfaces of non-metallic or semiconducting in organic material by chemical pretreatment only one step pretreatment
- C23C18/1879—Use of metal, e.g. activation, sensitisation with noble metals
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/28—Sensitising or activating
- C23C18/285—Sensitising or activating with tin based compound or composition
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/42—Coating with noble metals
- C23C18/44—Coating with noble metals using reducing agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
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- B01J37/0217—Pretreatment of the substrate before coating
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- C—CHEMISTRY; METALLURGY
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- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
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- C07C2603/02—Ortho- or ortho- and peri-condensed systems
- C07C2603/04—Ortho- or ortho- and peri-condensed systems containing three rings
- C07C2603/22—Ortho- or ortho- and peri-condensed systems containing three rings containing only six-membered rings
- C07C2603/24—Anthracenes; Hydrogenated anthracenes
Definitions
- the present invention relates to a process for the preparation of catalysts by electroless deposition of at least one platinum metal on a non-porous non-metallic support, the catalysts obtainable by this process, the uses
- Catalysts which contain platinum metals as catalytically active substances, are used in a variety of forms and are of great technical importance, e.g. B. in the reduction or hydrogenation of organic compounds and in catalytic cleaning
- catalytically active metals are usually applied to such porous supports by impregnating or impregnating the supports with solutions of salts or organometallic compounds.
- EP-A-0 875 235 describes a process for producing 35 supported noble metal catalysts on porous oxidic supports by electroless deposition of noble metals from aqueous solutions with reducing agents and in the presence of complexing agents.
- DE-A-44 12 463 describes the use of a palladium colloid solution containing at least one reducing agent and at least one protective colloid and additionally at least one noble metal or a noble metal compound for pretreating electrically non-conductive substrate surfaces before they are metallized with a metallizing solution.
- the deposition of at least one platinum metal on a non-porous non-metallic support is not described. This document also contains no teaching on the production of catalysts.
- No. 5,082,647 describes a process for the direct synthesis of hydrogen peroxide, a catalyst being used which comprises at least one metal of subgroup VIII on a hydrophobic support.
- Styrene-divinylbenzene copolymers, homo- and copolymers of ethylene and propylene, hydrophobized silicon dioxide, polytetrafluoroethylene, fluorinated carbon and carbon which have been hydrophobized by treatment with a silane or with fluorine are mentioned as hydrophobic carrier materials.
- the hydrophobic carrier has a surface area of at least 50 m 2 / g.
- WO-A-99/32398 describes a process for the direct synthesis of hydrogen peroxide, wherein catalysts on supports with small BET surface areas of preferably less than 1 m 2 per ml reactor volume are also to be used.
- Non-porous non-metals such as glass, quartz and organic polymers are proposed as carrier materials.
- EP-A-0 878 235 US 5,338,531 and to JR Kosak "A new novel fixed bed catalyst for the direct combination of H 2 and 0 2 to H 2 0 2 ", Chem. Ind. (Dekker), 1995, volume 62, Catalysis of Organic Reactions.
- the present invention has for its object to provide a method for producing improved non-metal-supported platinum metal catalysts.
- the aim here is to ensure that the expensive platinum metal is deposited as completely as possible and / or that the noble metal adheres well to the non-metal carrier.
- the ca Talysators preferably have a high catalytic activity and selectivity in hydrogenations, in particular in the direct synthesis of H 2 0 2 from hydrogen and oxygen.
- the catalysts should preferably be distinguished by improved service lives.
- the object was achieved by providing a process for the preparation of catalysts which comprise at least one platinum metal on a non-porous non-metallic support, wherein the support is first activated and then at least one platinum metal is electrolessly deposited on the support thus pretreated.
- an aqueous medium comprising at least one compound or a complex of a platinum metal and at least one reducing agent is brought into contact with the carrier.
- the catalysts produced according to the invention have excellent catalyst properties.
- essentially quantitative deposition of the platinum metal from the solution can be achieved.
- good adhesion of the platinum metals is also achieved on the non-porous non-metallic supports used.
- the catalytic coatings produced according to the invention have even with strong mechanical stress, such as z. B. occurs in the hydrogen peroxide synthesis, high abrasion resistance. Even after prolonged operation, there is usually no mechanical detachment.
- the present invention relates to a process for producing a catalyst which comprises at least one platinum metal on a non-porous non-metallic support, wherein
- step b) electrolessly depositing at least one platinum metal on the carrier treated according to step b), an aqueous medium comprising at least one compound or a complex of a platinum metal and at least one reducing agent being brought into contact with the carrier, and
- a non-porous support is used to produce the catalyst.
- a non-porous carrier is understood to mean a carrier with a pore volume determined by mercury porosimetry (Hg porosimetry) of at most 1.0 ml / g, preferably at most 0.1 ml / g and particularly preferably at most 0.05 ml / g.
- the proportion of the pore volume in the total volume of the carrier workpiece is preferably at most 2%, preferably at most 0.5%.
- the supports used according to the invention preferably have a BET surface area of at most 5 m 2 / g, in particular at most 0.2 m 2 / g.
- the non-metallic material used as the carrier is preferably selected from mineral materials, plastics and mixtures and combinations thereof.
- mineral material encompasses very generally non-metallic inorganic materials, such as natural and synthetic minerals, glasses, ceramics etc.
- a glass is preferably used as the mineral material. Glasses made of molten silicon dioxide or molten quartz and glasses based on alkali metal, alkaline earth metal, borosilicate, aluminosilicate and lead silicate are preferred.
- Preferred mineral carrier materials are also borate, phosphate, germanate,
- Chalcogenide and halide glasses such as. B. from beryllium fluoride.
- the mineral material used as the carrier is preferably also selected from ceramic materials.
- Suitable ceramic materials can be produced from metal oxides, borides, nitrides and / or carbides.
- the ceramic materials used according to the invention can be glazed or unglazed, crystalline or partially crystalline.
- ceramics made from base materials are preferably used, which are selected from aluminum oxide, silicon carbide, silicon nitride, zirconium dioxide and mixtures thereof. Ceramics containing cations, such as the z. B. in chelate, steatite, cordierite, anorthite, mullite or pollucite is the case. Ceramic composite materials are also preferred.
- a plastic carrier is used for the method according to the invention.
- the carriers used according to the invention preferably comprise at least one natural or synthetic polymeric material. Examples of such materials are:
- Polymers of mono- and diolefins for example polypropylene, polyisobutylene, polybutene-1, poly-4-methyl-pentene-1, polyisoprene or polybutadiene, and polymers of cycloolefins, such as, for. B. of cyclopentene or norbornene; also polyethylene (which may optionally be crosslinked), e.g. B. High density polyethylene (HDPE), high density and high molecular weight polyethylene (HDPE-HMW), high density and ultra high molecular weight polyethylene (HDPE-UHMW), medium density polyethylene
- HDPE High density polyethylene
- HDPE-HMW high density and high molecular weight polyethylene
- HDPE-UHMW high density and ultra high molecular weight polyethylene
- MDPE low density polyethylene
- LLDPE linear low density polyethylene
- VLDPE branched low density polyethylene
- Copolymers of mono- and diolefins with one another or with other vinyl monomers such as. B. ethylene-propylene copolymers, and their mixtures with other polymers, such as. B. polyamides.
- Polyvinyl aromatics such as polystyrene, poly- (p-methylstyrene), poly- ( ⁇ -methylstyrene).
- styrene-butadiene-styrene styrene-butadiene-styrene
- styrene-isoprene-styrene styrene-ethylene / butylene-styrene or styrene-ethylene / propylene-styrene.
- graft copolymers of polyvinylaromatics such as styrene or ⁇ -methylstyrene, such as.
- Halogen-containing polymers such as. B. polychloroprene, chlorinated rubber, chlorinated and brominated copolymer of isobutylene-isoprene (halobutyl rubber), chlorinated or chlorosulfonated polyethylene, copolymers of ethylene and chlorinated ethylene, epichlorohydrin homo- and copolymers, in particular polymers of halogen-containing vinyl compounds, such as , B.
- polyvinyl chloride polyvinylidene chloride, polyvinyl fluoride, polyvinylidene fluoride; and their copolymers, such as vinyl chloride-vinylidene chloride, vinyl chloride-vinyl acetate or vinylidene chloride-vinyl acetate.
- Polymers which are derived from ⁇ , ⁇ -unsaturated acids and their derivatives such as polyacrylates and polymethacrylates, impact-modified polymethyl methacrylates, polyacrylamides and polyacrylonitriles with butyl acrylate.
- copolymers of the monomers mentioned under 8 with each other or with other unsaturated monomers such as.
- Polyamides and copolyamides from diamines and dicarboxylic acids to and / or from aminocarboxylic acids or the corresponding LAECs Amen “derive”, “such as” polyamide “4", “polyamide '6, ⁇ amide PöTy- 6/6, 6 / 10, 6/9, 6/12, 4/6, 12/12, polyamide 11, polyamide 12, aromatic polyamides, for example starting from p-phenylenediamine and adipic acid, polyamides made from hexamethylene diamine in and Iso- and / or terephthalic acid and optionally an elastomer as modifier, for example poly-2,4,4-trimethyl-hexamethylene terephthalamide or poly-m-phenylene-isophthalamide.
- Block copolymers of the above-mentioned polyamides are also suitable Polyolefins, olefin copolymers, ionomers or chemically bonded or grafted elastomers, or with polyethers, such as, for example, with polyethylene glycol, polypropylene glycol or polytetramethylene glycol, are suitable also polyamides or copolyamides modified with EPDM or ABS; and polyamides condensed during processing (“RIM polyamide systems”).
- Polyureas Polyureas, polyimides, polyamideimides, polyetherimides, polyesterimides, polyhydantoins and polybenzimidazoles.
- Polyesters which are derived from dicarboxylic acids and dialcohols and / or from hydroxycarboxylic acids or the corresponding lactones, such as polyethylene terephthalate, polybutylene terephthalate, poly-l, 4-dimethylolcyclohexane terephthalate, polyhydroxybenzoates, and block polyether esters which differ from polyethers Derive hydroxyl end groups; furthermore polyesters modified with polycarbonates or MBS.
- Crosslinked polymers which, for. B. from aldehydes on the one hand and phenols, urea or melamine on the other hand, such as phenol-formaldehyde, urea-formaldehyde and melamine-formaldehyde resins.
- Crosslinkable acrylic resins derived from substituted acrylic acid esters, such as. B. of epoxy acrylates, urethane acrylates or polyester acrylates.
- Alkyd resins, polyester resins and acrylate resins which are crosslinked with melamine resins, urea resins, isocyanates, isocyanurates, polyisocyanates or epoxy resins.
- Crosslinked epoxy resins derived from aliphatic, cycloaliphatic, heterocyclic or aromatic glycidyl compounds, eg. B. products of bisphenol A diglycidyl ether, bisphenol F diglycid lethern, using conventional hardeners, such as. B. anhydrides or amines with or without accelerators.
- the carrier is preferably used in the form of a particulate, line-shaped, sheet-like or three-dimensional structure.
- particulate structures encompasses everything from fine pigments to macroscopic particles. These include in particular those with a particle size of 0.25 nm to 10 mm.
- Line-shaped structures are understood to mean in particular fibers, filaments and the like.
- the non-metallic supports are preferably used in the form of glass or plastic fibers.
- Sheet-like structures are in particular woven fabrics, knitted fabrics, felts, nonwovens, nets, knitted fabrics, mats, etc.
- Three-dimensional structures are generally shaped bodies of various dimensions.
- the non-metallic supports are preferably used in the form of shaped bodies.
- the shaped bodies can have the shape of spheres, pellets, short strands, Raschig rings, Pall® rings, saddle bodies, cylindrical lattice fillers,hackettes, spirals or helices.
- the non-metallic supports are also preferably used in the form of fabrics.
- the tissues in turn can be in the form of monoliths, i.e. H. ordered packs.
- Particularly suitable monoliths are made up of several layers of corrugated, kinked and / or smooth fabric, which are preferably arranged in such a way that adjacent layers form more or less closed channels.
- the hydraulic diameter of the channels is preferably in the range from 1 to 10 mm, in particular from 1.5 to 3 mm (as defined in VDI Heat Atlas, section LE 1).
- the channels can be straight or curved.
- Multi-layer fabrics are preferably used, in which smooth and wavy or kinked channels are formed.
- packings are generally added to the reactor as a loose bed, monoliths are preferably installed in the reactor, in particular in such a way that the channels are inclined against the flow direction of the reaction medium.
- the fabric layers themselves are preferably installed parallel to the flow direction in the reactor.
- the installation is preferably carried out in such a way that the throughflow channels are inclined alternately in opposite directions to the direction of flow.
- the structural units are preferably installed in such a way that the fabric layers of two successive structural units form an angle of preferably approximately 90 ° to one another. Winding modules made of corrugated or kinked and, if necessary, also of flat fabric layers are also suitable.
- non-porous non-metallic supports used according to the invention can be used for catalyst production in the way that they occur in their respective production process. If desired, however, the surface of the carrier can be roughened before the subsequent process steps.
- a roughening of carriers made of mineral materials, such as. B. of glass or ceramic carriers is preferably carried out by known mechanical methods, such as. B. by grinding with a material that has a higher hardness than that of the carrier.
- Suitable abrasive materials are e.g. B. quartz, corundum, garnet, emery and diamond.
- a suitable method for roughening glass or ceramic balls involves treatment in a rotating rotary tube with a finely powdered abrasive. The abrasive can then be separated from the backing material by conventional methods such as sieving or rinsing out with water. Glass surfaces can also be roughened by sandblasting.
- Mineral materials can preferably be etched, e.g. B. with hydrofluoric acid, aqueous alkali or aqueous mineral acid, such as.
- hydrochloric acid, nitric acid, phosphoric acid are roughened on the surface.
- Carriers made of plastic can preferably be roughened by treatment with chemicals attacking the surface, preferably with oxidizing agents.
- Suitable chemicals for roughening plastic surfaces are e.g. B. nitric acid, hydrogen peroxide, ammonia etc.
- the carrier is understood to mean a process in which germs for electroless deposition are formed on the surface of the carrier.
- the nuclei for electroless deposition generally consist of a metal, preferably a platinum metal, particularly preferably palladium.
- the carrier is expediently activated by treating it with a reducing agent and a salt of a platinum metal.
- the treatment of the carrier with the reducing agent and the platinum metal salt can be carried out simultaneously or in succession, in both cases the treatment can be carried out in one or more steps.
- the carrier can be cleaned prior to treatment.
- a cleaning step can follow the treatment or, in the case of a treatment in several steps, each treatment step.
- the treatment of the carrier in step b) is carried out with an aqueous medium which comprises at least one reducing agent and at least one salt of a platinum metal. The treatment can take place in one or more steps.
- the carrier is treated in step b) separately with at least one reducing agent and at least one platinum metal salt.
- a preferred method for treating the carrier in step b) comprises the following substeps:
- Steps b2) to b3) can be carried out once or several times.
- the treatment can be started and completed both with step b2) and with step b3).
- Steps b2) and b3) are preferably repeated one to ten times.
- a cleaning step can follow treatment steps b2) and / or b3), e.g. B. by bringing the carrier into contact with a rinsing solution.
- the carrier can be cleaned before the treatment steps by customary methods known to those skilled in the art. This includes e.g. B. see the treatment with aqueous surfactant solutions and / or the treatment with organic solvents and solvent mixtures, such as. As ethanol, ethanol-water mixtures, ethyl acetate, acetone, etc. If desired, cleaning can be carried out using ultrasound.
- aqueous surfactant solutions such as ethanol, ethanol-water mixtures, ethyl acetate, acetone, etc.
- cleaning can be carried out using ultrasound.
- As rinsing solutions for cleaning the carrier after a treatment step are, for. B. the pure aqueous media used for the treatment steps and in particular water.
- step b) an aqueous medium which is essentially free of organic solvents is preferably used.
- This medium preferably additionally contains at least one inorganic acid, in particular hydrochloric acid.
- the aqueous media used in step b) have an acidic pH.
- a pH ⁇ 6, in particular ⁇ 5, is particularly preferred.
- an aqueous medium which contains at least one reducing agent in completely or partially dissolved form.
- Suitable reducing agents are mentioned below in step c), to which reference is made here.
- Reducing agents preferably used in step b) are tin (II) chloride and titanium (III) chloride.
- Platinum metal salts suitable for treating the carrier in step b) are mentioned in the following step c), to which reference is made here. At least one is preferred as the platinum metal salt
- Step b) the aqueous medium used can contain, in addition to at least one platinum metal salt, at least one further salt of a metal of the iron group and / or the 1st subgroup.
- Nickel and silver salts are preferred.
- the treatment of the carrier in step b) comprises contacting with an aqueous medium with a tin (II) chloride content in the range from about 1 to 20 g / 1 and a content of concentrated hydrochloric acid of about 1
- the treatment is preferably carried out at a temperature in the range from about 10 to 40 ° C., in particular at ambient temperature.
- the treatment time with the reducing agent is in particular in a range from about 0.1 to 30 minutes, in particular 0.5 to 10 minutes.
- the carrier is preferably after
- aqueous medium with a palladium chloride content in the range from about 0.02 to 2 g / 1 and a content of concentrated hydrochloric acid in the range from about 0.1 to 10 ml / 1.
- This aqueous medium can be any aqueous medium with a palladium chloride content in the range from about 0.02 to 2 g / 1 and a content of concentrated hydrochloric acid in the range from about 0.1 to 10 ml / 1.
- the treatment with the platinum metal is preferably also carried out at a temperature in the range from about 10 to 40 ° C., in particular at ambient temperature.
- the treatment time is preferably in a range from about 0.1 to 30 minutes, particularly preferably 0.5 to
- the treated carrier is preferably rinsed again with water.
- an aqueous medium which contains at least one reducing agent, at least one platinum metal salt and, if appropriate, at least one further salt of a metal of the iron group or the first subgroup, is first provided in step b) and the carrier then brought into contact with it.
- the treatment of the carrier with the solution provided is preferably carried out within about 24 hours.
- the treated carrier is preferably rinsed with water.
- step b) a quantity of platinum metal is deposited on the carrier which is small compared to the total quantity deposited on the carrier.
- the amount of platinum metal deposited in step b) is preferably at most 10% by weight, particularly preferably at most 1% by weight, based on the total amount deposited on the support.
- the pretreatment of the support in step b) contributes to the fact that the process according to the invention gives catalysts in which the platinum metal adheres well to the non-porous support material.
- the catalytic coatings produced in this way have a high abrasion resistance even under heavy mechanical stress.
- the support which has been pretreated in this way can finally be dried by customary processes known to those skilled in the art. However, it can also be used moist for the subsequent treatment in step c).
- Platinum metals in the sense of the invention are the noble metals of the 8th subgroup of the periodic table which do not belong to the iron group, namely ruthenium, rhodium, iridium, palladium, osmium and platinum. Ruthenium, rhodium, palladium and platinum are preferred, palladium and platinum are particularly preferred.
- the catalysts according to the invention can comprise several platinum metals. All combinations of the platinum metals mentioned are suitable, combinations of palladium and platinum, of palladium and rhodium, of palladium and iridium, of palladium, platinum and rhodium and of palladium, platinum and iridium are preferred. Palladium and platinum are particularly preferred as a combination. In the combinations with palladium, palladium is preferably the main platinum metal component. The palladium content is then preferably above 40% by weight, preferably above
- the further platinum metals optionally contained as secondary constituents can each account for up to 30% by weight, preferably up to 20% by weight and particularly preferably up to 15% by weight, of the total platinum metal content.
- the platinum metals preferably comprise 80 to 100% by weight of palladium and 0 to 20% by weight of platinum or iridium. In most cases make up 1 to 3 of the platinum metals mentioned more than 95 wt .-% of the amount of platinum metal used. If, in addition to a main platinum metal, other platinum metals are also present, these are generally present in amounts of greater than 0.001% by weight, preferably greater than 0.01% by weight, e.g. B. about 0.1% by weight, about 1% by weight or about 5% by weight.
- the catalytically active component of the catalysts according to the invention can contain further elements as additional components or, if appropriate, in the form of impurities.
- Preferred additional components, the z. B. can affect the activity and / or selectivity of the catalyst are selected from metals, non-metals and their compounds. These preferably include metals such as cobalt, nickel, copper, silver, gold, chromium, molybdenum, tungsten, manganese, rhenium, aluminum, tin, lead, arsenic, antimony and bismuth, and non-metals such as boron, carbon, silicon, Nitrogen and phosphorus.
- the metals and non-metals mentioned can be present in the catalytically active coating both in ionic and in nonionic form.
- the catalytically active component may contain other elements (metals and non-metals) as impurities, e.g. B. by the fact that the catalytically active components used contain impurities, or that components of the components used in the process according to the invention are incorporated into the platinum metal coatings during the process for the preparation of the catalysts according to the invention, such as. B. alkali and alkaline earth metals, phosphorus, boron and halogens.
- an aqueous medium which additionally comprises at least one compound of a metal from the 6th, 7th or 1st subgroup, the iron group or bismuth.
- the additional components can be present at 0.001 to 25% by weight, based on the platinum metal content.
- Additional components used as promoters or dopants generally make up 0.01 to 20% by weight, preferably 0.1 to 15% by weight and in particular 0.5 to 10% by weight, based on the platinum metal content ,
- the platinum metals are preferential, as a 'platinum metal complexes used.
- Platinum metal complexes in which the platinum metal is present in the oxidation states +1 to +4 are preferably used.
- Four-coordinate complexes are preferred.
- the process according to the invention is preferably suitable for the production of platinum metal catalysts in which palladium is the main platinum metal component.
- Palladium (II) complexes are preferably suitable for the preparation of catalysts which contain palladium, and in particular of catalysts which contain palladium as the main platinum metal component. Palladium (II) complexes in which palladium has the coordination number 4 are particularly suitable.
- Such combinations of platinum metal ions and ligand are preferably selected whose complex formation constant is> 1000 and in particular> 10000.
- Suitable combinations of ligands and counterions for palladium complexes and for platinum metal complexes other than palladium can be selected according to the principle of charge neutrality.
- Suitable negatively charged ligands are e.g. B. selected from halides and pseudohalides, such as chloride, bromide, yodide, CN, OCN and SCN, -C-C 6 carboxylic acids, such as formic acid, acetic acid and propionic acid and their salts, chelate ligands, such as ethylenediaminetetraacetic acid (EDTA), Nitrilotriacetic acid, 1,2-diaminocyclohexanetetraacetic acid and its salts, aminophosphonic acids such as nitrilomethylenephosphonic acid, diketonates such as acetylacetonate, hydroxycarboxylic acids such as glycolic acid, lactic acid, tartaric acid and gluconic acid, and their salts.
- Suitable as electroneutral ligands are e.g. B. alkyl nitriles such as acetonitrile, amines such as ammonia, primary, secondary and tertiary C 1 -C 6 alkyl amines such as ethylamine, n-propylamine, isopropylamine, n-butylamine, tert-butylamine, hexylamine, dimethylamine, di - ethylamine, diisopropylamine, di-n-butylamine, trimethylamine, triethylamine, tripropylamine, N, N-dimethylethylamine, N, N-dimethylisopropylamine and N, N-dimethylbutylamine, di-, tri-, tetra- and poly- amines, such as ethylenediamine, diethylenetriamine and triethylenetetraamine, non-aromatic and aromatic cyclic amines, such as
- halides chloride and bromide are particularly preferred as complex ligands;
- Amines especially ammonia and triethylamine, cyanide and ethylenediaminetetraacetic acid, and the di-, tri- or tetra-alkali metal (such as sodium) or ammonium salts thereof.
- Alkali metals such as lithium, sodium and potassium, alkaline earth metals such as magnesium and calcium, nitrite, nitrate and ammonium are preferably suitable as counterions.
- Suitable platinum metal complexes are preferably at least 0.01% by weight soluble in water at room temperature (25 ° C.).
- the platinum metal complex (s) are used in an aqueous medium, in such a concentration that the platinum metal content of the solution is in the range from 0.001 to 2 g / 1, preferably in the range from 0.1 to 0.5 g /1.
- Preferred palladium complexes are H 2 PdHal 4 , M 2 PdHal, M 2 Pd (CN) 4 , (NH 4 ) 2 PdHal 4 , Pd (NH 3 ) 4 Hal 2 , Pd (NH 3 ) 4 (N0 3 ) 2 and Pd (NH 3 ) 4 (CN) 2 , where M represents alkali metals, especially sodium and potassium, and shark represents halogen atoms, especially chlorine, bromine or iodine.
- Preferred further platinum metal complexes are (NH 4 ) 2 IrCl 6 , HPtCl, (NH) 2 PtCl, Na 2 PtCl 4 and K 2 PtCl 4 .
- the aqueous medium contains at least one reducing agent in completely or partially dissolved form.
- Suitable as reducing agents for steps b) and c) are all substances or mixtures of substances whose redox potential lies below the redox potential of the platinum metal complex used.
- Substances with a standard potential in aqueous medium of less than +0.5 volts are preferred, but preferably with a standard potential less than 0 volts.
- At least 1% by weight, preferably at least 10% by weight, of the reducing agent or mixture of reducing agents is lent in the aqueous medium at room temperature (25.degree. C.).
- the reducing agent or the reducing agent mixture is practically completely soluble in the aqueous medium.
- suitable reducing agents are carboxylic acids, such as formic acid, citric acid, lactic acid, tartaric acid and in particular the salts of the carboxylic acids, preferably the alkali metal, alkaline earth metal, ammonium and Ci-Cio-alkylammonium salts, phosphorous or hypophosphorous acid, the salts of phosphorous or hypo - Phosphorous acid, especially the alkali metal or alkaline earth metal salts, Ci-Cio-alkanols, such as methanol, ethanol and isopropanol, sugar, such as aldoses and ketoses in the form of mono-, di- and oligosaccharides, especially glucose, fructose and Lactose, aldehydes, such as formaldehyde, hydrogen boron compounds, such as.
- carboxylic acids such as formic acid, citric acid, lactic acid, tartaric acid and in particular the salts of the carboxylic acids, preferably the alkali metal, alka
- B. borohydrides, boranes, metal boranates and borane complexes for.
- Preferred reducing agents for step c) are sodium and potassium hypophosphite, ammonium formate, trimethylamine borane, sodium borohydride, sodium dithionite and sodium hydrogen dithionite, and mixtures of ammonium formate and sodium hypophosphite.
- At least one redox equivalent, based on the sum of the platinum metals and additional components (e.g. promoters / doping components), of reducing agent is used.
- the reducing agent is preferably used in excess.
- a molar ratio of reducing agent to platinum metal 10: 1 to 100: 1 and particularly preferably 20: 1 to 60: 1, such as for example about 30: 1, about 40: 1 or about 50: 1, is particularly suitable.
- an aqueous medium with a pH of greater than 6 is preferably used for the electroless deposition of the platinum metal.
- This is preferably in a range from 7 to 14, in particular 8 to 12.
- bases are all substances or compounds which are suitable for adjusting the pH of the aqueous medium to the desired value.
- those bases are used which have complex stabilizing properties, i. H. at least partially have a Lewis base character.
- the base is preferably selected from metal oxides, metal hydroxides, in particular alkali metal hydroxides, such as sodium hydroxide and potassium hydroxide, metal carbonates, in particular alkali metal and alkaline earth metal carbonates, such as lithium carbonate, sodium carbonate, potassium carbonate, magnesium carbonate and calcium carbonate, nitrogen bases, in particular ammonia, primary, secondary and tertiary amines, such as those previously described for the nitrogen-containing complex ligands.
- Buffer systems are also suitable, in particular those from the aforementioned bases, the salts of the aforementioned bases and / or suitable acids. Particularly preferred bases are ammonia and sodium hydroxide solution.
- aqueous media are substances or mixtures of substances which are liquid under the process conditions and contain at least 10% by weight, preferably at least 30% by weight and in particular at least 50% by weight of water.
- the part other than water is preferably selected from water- at least partially soluble or at least partially miscible with water inorganic or organic substances.
- the substances other than water are selected from organic solvents, -C 22 alkanols, in particular methanol, ethanol, n-propanol, isopropanol, n-butanol, sec-butanol, tert-butanol, pentanols and hexanols, C 4 -C 8- cycloalkyl ethers, such as tetrahydrofuran, pyrans, dioxanes and trioxanes, C 1 -C 4 -dialkyl ethers, such as dimethyl ether, dibutyl ether and methyl butyl ether, and customary auxiliaries, such as are used in processes for electroless deposition.
- organic solvents -C 22 alkanols, in particular methanol, ethanol, n-propanol, isopropanol, n-butanol, sec-butanol, tert-butanol, pentanols and
- the aqueous medium preferably contains less than 40%, in particular less than 30% and particularly preferably less than 20% organic solvent.
- the aqueous medium is essentially free of organic solvents.
- the aqueous solution preferably additionally comprises at least one ligand (complexing agent).
- the ligand preferably has at least one halogen, nitrogen, oxygen and / or phosphorus atom.
- Complexing agents in the sense of the present invention are ions or compounds which are able to stabilize metal ions in aqueous media. As a rule, such complexing agents are donors or salts of donors. Suitable donors usually have a lone pair of electrons that can interact with the metal ions. Complexing agents which have the above-mentioned hetero atoms as donors are particularly suitable for the process according to the invention. Examples of suitable complexing agents are the metal salts, in particular the alkali metal and alkaline earth metal salts, of the compounds previously mentioned as complex ligands of the platinum metals.
- hydrohalic acids such as hydrogen bromide, hydrogen chloride and hydrogen iodide
- B sodium and / or potassium tartrate.
- platinum metal complex, reducing agent, optionally base and optionally complexing agent can be added to the aqueous medium in any order. Preferably at least a portion of the base is added to the aqueous medium before the reducing agent is added.
- the platinum metal complex if appropriate the complexing agent and / or the base, are initially introduced into the aqueous medium in step c) and the reducing agent is then added.
- the temperature in step c) is in the range between 0 and 100 ° C., preferably in the range from 30 to 100 ° C. and in particular in the range from 40 to 85 ° C.
- the active component ie the platinum metal or the platinum metals and any additional components which may be present, generally make up 5 ⁇ 10 -4 to 5% by weight, in particular 10 -3 to 1% by weight, particularly preferably 0.01 to 1 0% by weight, based on the total catalyst mass (support + catalytically active coating).
- an additional complexing agent is added to the solution, 0.1 to 10,000 equivalents, preferably 1 to 1000 equivalents, particularly preferably 10 to 600 equivalents of the complexing agent, based on the platinum metal component, are generally used.
- the activated non-metallic support in step c) is only brought into contact with the aqueous medium when the aqueous medium contains at least the platinum metal complex, the reducing agent, at least part of the base and optionally the additional complexing agent.
- the carrier can first be brought into contact with all of the components mentioned above, except for the platinum metal. The platinum metal is then at reaction temperature or a z. B. added up to 30 ° C lower temperature. “Reaction temperature” in the sense of the present invention means the temperature at which the platinum metal is deposited on the carrier.
- reaction time required for the deposition of the platinum metal on the supports is generally between 0.5 and 500 minutes, preferably 1 and 300 minutes and particularly preferably between 2 and 60 minutes.
- the platinum metals used are deposited on the support.
- the platinum metal is bonded so tightly to the metallic support that it is not significantly replaced by contact with liquids and gases when used in catalytic reactions.
- Additional components in particular the elements suitable as promoters or doping components, can optionally be added to the aqueous medium together with the platinum metal, so that the deposition of the platinum metal and the installation of the additional components take place essentially simultaneously.
- the additional components can also be added to the reaction solution towards the end or after the platinum metal deposition has ended, as a result of which the additional components are preferably installed on the surface of the active component.
- the additional components can also be applied to the catalysts of the invention in a separate second step, for. B. by vapor deposition or by electroless separation from aqueous and non-aqueous media.
- the application of additional components to the catalysts of the invention in a separate second step is particularly advantageous if you want to apply them specifically to the surface of the active component.
- other deposition conditions that deviate from the conditions according to the invention can be selected for the second step.
- the catalysts obtained in step c) can then be formed at temperatures of 0 to 500 ° C, preferably 10 to 350 ° C, and pressures between normal pressure and 200 bar gauge pressure.
- the formation can take place, for example, in the presence of water and / or hydrogen. These can be used in the form of mixtures with an inert gas such as nitrogen. Formation with hydrogen is preferred.
- the temperature is preferably 10 to 200 ° C, in particular 30 to 150 ° C.
- the pressure is preferably 1 to 150 bar, in particular 10 to 100 bar and particularly preferably 30 to 70 bar.
- formation lasts 0.1 to 10 hours, preferably 1 to
- the catalysts are formed in presence of the aqueous reaction medium which is described below for the synthesis of water peroxide according to the invention.
- the catalysts according to the invention are prepared by at least 0.01 to 3 g / 1, preferably 0.05 to 0.3 g / 1, of at least one platinum metal complex (weights based on the metal) , optionally 0.0001 to 0.3 g / 1, preferably 0.001 to 0.03 g / 1 of at least one further element compound and, based on the platinum metal, at least 20, preferably 50 and particularly preferably at least 100 equivalents of a complexing agent and at least 10 to 100, preferably 20 to 80 and particularly preferably 40 to 60 equivalents of a reducing agent dissolves in an aqueous medium.
- Another object of the present invention is a catalyst obtainable by one of the methods described above.
- the invention also relates to platinum metal catalysts with a non-metallic support and a catalytically active coating applied thereon, which are characterized in that the catalytically active coating has discrete platinum metal particles immobilized on the support surface with an average particle diameter of less than about 1 ⁇ , preferably less less than about 100 nm.
- the platinum metal particles preferably have an average diameter of more than about 1 nm and can e.g. B. have diameters in the range of about 20 to 100 nm.
- the discrete particles preferably have an approximately spherical shape.
- the subject matter is a catalyst in which the non-porous non-metallic support essentially consists of glass, ceramic or a polymer.
- Such catalysts preferably have a platinum metal content in the range from 0.01 to 50 g / kg of support.
- the catalysts obtainable by this process preferably have a selectivity of greater than 60%, in particular greater than 70% and particularly preferably greater than 80%.
- the catalysts of the invention are preferably suitable for the hydrogenation of organic and inorganic compounds and in particular for organic compounds such as olefins, for. B. ethylene, propylene, acetylene and butadiene, carbonyl compounds, z. B. aldehydes, ketones, aromatics, such as. As benzene, and particularly preferably for the hydrogenation of oxygen.
- organic compounds such as olefins, for. B. ethylene, propylene, acetylene and butadiene, carbonyl compounds, z. B. aldehydes, ketones, aromatics, such as. As benzene, and particularly preferably for the hydrogenation of oxygen.
- Another object of the present invention is a process for the production of hydrogen peroxide, wherein a catalyst as described above in a liquid medium, preferably an essentially aqueous solution with an oxygen / hydrogen mixture with a mixing ratio in the range of about 5: 1 to 100: 1, especially 5: 1 to 30: 1.
- the present invention also relates to the use of the catalysts according to the invention for the synthesis of hydrogen peroxide from the elements, both according to the anthraquinone process or an analogous process, and also by direct synthesis, ie by direct reaction of oxygen and hydrogen over a platinum metal catalyst in a liquid medium , Suitable methods are e.g. B. described in WO 98/16463, to which reference is made here in full.
- the use of the catalysts according to the invention for the direct synthesis of H 2 0 is particularly preferred.
- Suitable reactors for the synthesis of H 2 0 2 are described, for example, in EP-A-068 862, EP-A-201 614 and EP-A-448 884.
- Tube reactors in which the catalyst according to the invention is present as a bed or in the form of cylindrical catalyst units are particularly preferred.
- Appropriate shaping for the carriers, as described above, can ensure optimum flow conditions for gas and liquid.
- the reaction is carried out in cocurrent with the reactor flooded with liquid and gas.
- the liquid phase preferably trickles down over the catalyst bed.
- the gas can be conducted in cocurrent or in countercurrent, preferably in cocurrent.
- the hydrogen can preferably be fed to the reactor via one or more intermediate feeds downstream from the feed point of the oxygen or the air.
- the empty tube speed of reaction gas and reaction medium is preferably in a range from about 20 to 7000 m / h, particularly preferably in a range from 50 to 1400 m / h.
- Water and / or C ⁇ -C 3 -alkanols are preferably used as the reaction medium. If as a reaction medium water is used, this can be added up to 20 wt .-% of the alcohol, preferably methanol. If an alcoholic reaction medium is used, it can contain 40% by weight, preferably up to 20% by weight and particularly preferably up to 5% by weight of water. Water is very particularly preferably used as the sole reaction medium.
- acids the pK a value of which is preferably smaller than that of acetic acid, in particular mineral acids, such as sulfuric acid, phosphoric acid or hydrochloric acid, are added to the reaction medium.
- the acid concentration is generally at least 10 -4 mol / liter, preferably 10 -3 to 10 -1 mol / liter. Furthermore, traces of bromide or chloride are generally added in concentrations of 1 to 1000 ppm, preferably 5 to 700 ppm and particularly preferably 50 to 600 ppm. However, other stabilizers, such as. B. formaldehyde can be used.
- the reaction gas which in addition to hydrogen and oxygen can also contain inert gases such as nitrogen or noble gases, generally has 0 2 : H 2 ratios in the range from 2: 1 to 1000: 1. Molar ratios in the range from 5: 1 to 100: 1, in particular 20: 1 to 100: 1, are preferably used.
- the oxygen used in the reaction gas can also be added to the reaction gas in the form of air.
- the reaction gas is circulated.
- the molar ratio in the fresh gas mixture is close to the stoichiometry, preferably in the range from 1.5: 1 to 0.5: 1.
- the molar ratio 0 2 : H 2 in the cycle gas should be in the range from 5: 1 to 1000: 1, preferably in the range from 20: 1 to 100: 1.
- the reaction can be carried out at normal pressure and also under excess pressure up to 200 bar.
- the pressure is preferably 10 to 300 bar, in particular 10 to 80 bar.
- the reaction temperature can be in the range from 0 to 80 ° C., preferably in the range from 5 to 60 ° C. and in particular from 25 to 55 ° C.
- the partial pressures of the reaction gases in the reaction gas mixture in the reactor and in the cycle gas are preferably selected such that the hydrogen concentration is below the lower explosion limit under reaction conditions.
- the described process can be used to produce hydrogen peroxide solutions with hydrogen peroxide contents above 2% by weight, preferably in the range from 3 to 25% by weight.
- the concentration can be preselected in the desired manner by adjusting the material flows.
- the selectivity of the hydrogen peroxide education lies z. B. above 65%, preferably> 70%. Long-term studies have shown that even after more than 40 days of operation, there is no or only a slight decrease in the catalyst activity and selectivity.
- Another object of the invention is a method for catalytic reduction by reacting an inorganic or organic compound containing at least one hydrogen acceptor group with hydrogen, the reaction taking place in the presence of at least one catalyst according to the invention, as described above.
- the catalysts of the invention are preferably suitable for the hydrogenation of carbon-carbon double and triple bonds.
- 850 ml of glass balls made of soda-lime glass with a diameter of 1 mm are mixed with 850 ml of silicon carbide sand in a rotating flask for 24 hours.
- the balls are poured onto a suction filter with a perforated plate and the sand is washed out with water. Afterwards, place them on the built-in glass balls on a G3 nutsche.
- the glass spheres treated in this way had a pore volume which was below the limit of quantification of the Hg porosimetry and a BET surface area of 0.024 m 2 / g.
- a solution of 10 g of tin (II) chloride and 20 ml of concentrated hydrochloric acid in 2 l of water is made up and allowed to seep through the glass spheres in 2 minutes. Then it is rinsed with 2 l of water.
- a solution of 0.4 g of palladium chloride and 2 ml of concentrated hydrochloric acid in 2 l of water is then allowed to seep through the glass ball layer again in 2 minutes and is then rinsed again with water. The entire procedure is repeated five more times.
- the activated spheres are then dried overnight at 75 ° C. and 100 mbar.
- a third of the activated glass balls are filled into a double-walled glass tube 1 m long and 2.2 cm in diameter.
- To the Glass tube is connected to a hose pump for circulating liquid and a thermostat for heating via the jacket.
- a solution of 14.2 g sodium hypophosphi, 32.8 g ammonium chloride and 47.5 ml 25% ammonia in 412 ml water is poured into the tube, the circulation pump is switched on and the thermostat is heated to an internal temperature of 58 ° C , A solution of 265 mg sodium tetrachloropalladate and 1 mg hexachloroplatinic acid in 10 ml water is then added.
- the glass spheres turn black immediately with violent gas evolution.
- the catalyst 40 circulated for 15 minutes at this temperature. After draining the liquid, the catalyst is washed with water and dried at 75 ° C and 100 mbar.
- a solution of 346 mg of sodium tetrachloropalladate and 1.43 mg of hexachloroplatinic acid in 10 ml of water is then added with pumping. After 10 minutes, the solution is drained off and washed with water.
- the second half of the activated carrier is mixed with the same chemicals as above in a stirred flask, stirring at 45 ° C. at 1000 rpm.
- the catalyst is filtered off and washed with water. Both parts are mixed and dried at 50 ° C and 100 mbar.
- the analysis showed that the precious metals were separated quantitatively. The analysis shows a palladium content of 285 mg / kg.
- 750 ml of 3 mm Raschig rings made of glass (with a pore volume determined by mercury porosimetry of 0.036 ml / g and a BET surface area of 0.034 m 2 / g) are activated with tin and palladium as described for catalyst 1.
- a third of the activated Raschig rings are filled into a double-walled glass tube 1 m long and 2 cm in diameter.
- a peristaltic pump for circulating liquid and a thermostat for heating are attached to the glass tube
- the catalyst 35 rinsed with water.
- the catalyst is then dried overnight at 75 ° C and 100 mbar.
- the coating is repeated with a further 115 ml of the activated glass balls, and both portions are mixed to form catalyst 14.
- the palladium content of the catalyst is 71 mg / kg.
- the properties of the catalysts were checked in the direct synthesis of hydrogen peroxide from hydrogen and oxygen (Examples B1 to B19) and in the hydrogenation of 2-ethylanthraquinone and hydrodehydrolinalool (Examples B20 and B21).
- a double jacket reactor with an inner diameter of 2.1 cm and a length of 2 m is charged with the catalyst 1.
- a solution of 5 g / 1 phosphoric acid and 120 mg / 1 hydrogen bromide in water is poured over the catalyst bed at a rate of 250 ml per hour.
- a gas compressor with the help of a gas compressor, a mixture of 3% hydrogen and 97% oxygen is pumped from top to bottom in a circle over the catalyst bed at a rate of 10,400 Nl / h.
- the gas mixture is generated using two mass flow meters for hydrogen and oxygen. Its composition is determined and readjusted with the help of a thermal conductivity detector, through which a small partial flow is passed as an exhaust gas flow.
- the amount of hydrogen consumed by the reaction to form hydrogen peroxide and water is calculated from the introduced mass flows of the gases and from the exhaust gas flow.
- the product mixture emerging from the reaction tube is separated from the gases under pressure in a separator and is conveyed out of the system in liquid form.
- the mass flow is balanced against the inflow flow.
- the hydrogen peroxide content in the liquid discharge is determined by titration.
- the selectivity becomes from the mass of the discharge stream, the content of hydrogen peroxide and the amount of hydrogen consumed calculated based on hydrogen.
- the space-time yield results from the amount of hydrogen peroxide formed per unit of time based on the volume of 690 ml of catalyst bed in the tubular reactor.
- Examples 1 to 9 and 11 to 19 and comparative example 10 were carried out analogously to the instructions for example 1.
- the reaction conditions and results of the reaction are summarized in Table 1.
- a double jacket reactor with an inner diameter of 2.1 cm and a length of 2 m is charged with the catalyst 4.
- a solution of 13% by weight of 2-ethylanthraquinone in a mixture of 70% by weight of a hydrocarbon mixture (Shellsol®) and 30% by weight of tetrabutylurea is left at a rate of 2700 continuously pour ml / h over the catalyst bed.
- the hydrogenated working solution emerging from the reaction tube is separated from the gas in a separator and conveyed out of the system in liquid form.
- Catalyst 14 (152 ml) is filled together with hydrodehydrolmalool in a double jacket tube with a diameter of 2 cm. With appropriate pumps, the liquid and hydrogen are circulated at 1.1 bar and 80 ° C with cross-sectional loads of 200 m 3 / m 2 each. The acetylene alcohol is hydrogenated with a conversion rate of 15% / h and a selectivity> 98% to hydrolinalool.
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Description
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Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10048844A DE10048844A1 (de) | 2000-10-02 | 2000-10-02 | Verfahren zur Herstellung von Platinmetall-Katalysatoren |
| DE10048844 | 2000-10-02 | ||
| PCT/EP2001/011347 WO2002028527A1 (de) | 2000-10-02 | 2001-10-01 | Verfahren zur herstellung von platinmetall-katalysatoren durch stromlose abscheidung und deren verwendung zur direktsynthese von wasserstoffperoxid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1326709A1 true EP1326709A1 (de) | 2003-07-16 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01969806A Withdrawn EP1326709A1 (de) | 2000-10-02 | 2001-10-01 | Verfahren zur herstellung von platinmetall-katalysatoren duch stromlose abscheidung und deren verwendung zur direktsynthese von wasserstoffperoxid |
| EP01982387A Expired - Lifetime EP1328344B1 (de) | 2000-10-02 | 2001-10-01 | Geträgerter, durch kontrollierte stromlose abscheidung erhältlicher platinmetall-katalysator |
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| Application Number | Title | Priority Date | Filing Date |
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| EP01982387A Expired - Lifetime EP1328344B1 (de) | 2000-10-02 | 2001-10-01 | Geträgerter, durch kontrollierte stromlose abscheidung erhältlicher platinmetall-katalysator |
Country Status (13)
| Country | Link |
|---|---|
| US (2) | US6936564B2 (de) |
| EP (2) | EP1326709A1 (de) |
| JP (2) | JP4308517B2 (de) |
| KR (2) | KR100821423B1 (de) |
| CN (2) | CN1276789C (de) |
| AT (1) | ATE369912T1 (de) |
| AU (2) | AU2002213986A1 (de) |
| CA (2) | CA2423009C (de) |
| DE (2) | DE10048844A1 (de) |
| MX (2) | MXPA03002660A (de) |
| MY (1) | MY131574A (de) |
| WO (2) | WO2002028528A1 (de) |
| ZA (2) | ZA200303325B (de) |
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2001
- 2001-10-01 CN CNB018167594A patent/CN1276789C/zh not_active Expired - Fee Related
- 2001-10-01 MX MXPA03002660A patent/MXPA03002660A/es active IP Right Grant
- 2001-10-01 WO PCT/EP2001/011346 patent/WO2002028528A1/de not_active Ceased
- 2001-10-01 KR KR1020037004612A patent/KR100821423B1/ko not_active Expired - Fee Related
- 2001-10-01 JP JP2002532348A patent/JP4308517B2/ja not_active Expired - Fee Related
- 2001-10-01 EP EP01969806A patent/EP1326709A1/de not_active Withdrawn
- 2001-10-01 JP JP2002532347A patent/JP4054676B2/ja not_active Expired - Fee Related
- 2001-10-01 AU AU2002213986A patent/AU2002213986A1/en not_active Abandoned
- 2001-10-01 AT AT01982387T patent/ATE369912T1/de not_active IP Right Cessation
- 2001-10-01 KR KR10-2003-7004603A patent/KR20030041143A/ko not_active Withdrawn
- 2001-10-01 CA CA2423009A patent/CA2423009C/en not_active Expired - Fee Related
- 2001-10-01 US US10/381,595 patent/US6936564B2/en not_active Expired - Fee Related
- 2001-10-01 CN CNB018167616A patent/CN1255212C/zh not_active Expired - Fee Related
- 2001-10-01 MX MXPA03002396A patent/MXPA03002396A/es active IP Right Grant
- 2001-10-01 WO PCT/EP2001/011347 patent/WO2002028527A1/de not_active Ceased
- 2001-10-01 EP EP01982387A patent/EP1328344B1/de not_active Expired - Lifetime
- 2001-10-01 CA CA002422806A patent/CA2422806A1/en not_active Abandoned
- 2001-10-01 US US10/381,594 patent/US7070757B2/en not_active Expired - Fee Related
- 2001-10-01 MY MYPI20014591A patent/MY131574A/en unknown
- 2001-10-01 DE DE50112872T patent/DE50112872D1/de not_active Expired - Lifetime
- 2001-10-01 AU AU2001289946A patent/AU2001289946A1/en not_active Abandoned
-
2003
- 2003-04-30 ZA ZA200303325A patent/ZA200303325B/en unknown
- 2003-04-30 ZA ZA200303326A patent/ZA200303326B/xx unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3698939A (en) * | 1970-07-09 | 1972-10-17 | Frank H Leaman | Method and composition of platinum plating |
| US4200552A (en) * | 1976-10-06 | 1980-04-29 | Toyota Jidosha Kogyo Kabushiki Kaisha | Catalyst carrier, catalyst and their manufacturing process |
| EP0584887A2 (de) * | 1992-08-28 | 1994-03-02 | Union Carbide Chemicals & Plastics Technology Corporation | Katalysatoren zur Behandlung von Abgasen von Verbrennungskraftmaschinen und ortfesten Motoren |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002028528A1 (de) | 2002-04-11 |
| WO2002028527A1 (de) | 2002-04-11 |
| EP1328344A1 (de) | 2003-07-23 |
| CA2423009C (en) | 2010-12-14 |
| US6936564B2 (en) | 2005-08-30 |
| JP4308517B2 (ja) | 2009-08-05 |
| AU2001289946A1 (en) | 2002-04-15 |
| CA2422806A1 (en) | 2003-03-18 |
| JP2004516921A (ja) | 2004-06-10 |
| ZA200303325B (en) | 2004-04-30 |
| DE10048844A1 (de) | 2002-04-11 |
| DE50112872D1 (de) | 2007-09-27 |
| MY131574A (en) | 2007-08-30 |
| US20040013601A1 (en) | 2004-01-22 |
| US20040037770A1 (en) | 2004-02-26 |
| CN1468148A (zh) | 2004-01-14 |
| MXPA03002660A (es) | 2003-06-24 |
| ATE369912T1 (de) | 2007-09-15 |
| MXPA03002396A (es) | 2003-06-19 |
| JP2004516922A (ja) | 2004-06-10 |
| CN1276789C (zh) | 2006-09-27 |
| ZA200303326B (en) | 2004-04-30 |
| CN1255212C (zh) | 2006-05-10 |
| KR100821423B1 (ko) | 2008-04-10 |
| KR20030041144A (ko) | 2003-05-23 |
| CA2423009A1 (en) | 2003-03-20 |
| KR20030041143A (ko) | 2003-05-23 |
| JP4054676B2 (ja) | 2008-02-27 |
| CN1468150A (zh) | 2004-01-14 |
| AU2002213986A1 (en) | 2002-04-15 |
| EP1328344B1 (de) | 2007-08-15 |
| US7070757B2 (en) | 2006-07-04 |
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