IT1190423B - Metal oxide, fluoride or oxyfluoride catalyst - Google Patents
Metal oxide, fluoride or oxyfluoride catalystInfo
- Publication number
- IT1190423B IT1190423B IT22902/85A IT2290285A IT1190423B IT 1190423 B IT1190423 B IT 1190423B IT 22902/85 A IT22902/85 A IT 22902/85A IT 2290285 A IT2290285 A IT 2290285A IT 1190423 B IT1190423 B IT 1190423B
- Authority
- IT
- Italy
- Prior art keywords
- pref
- fluoride
- cracking
- catalyst
- metal oxide
- Prior art date
Links
- 239000003054 catalyst Substances 0.000 title abstract 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 title abstract 2
- 229910001512 metal fluoride Inorganic materials 0.000 title 1
- 229910044991 metal oxide Inorganic materials 0.000 title 1
- 150000004706 metal oxides Chemical class 0.000 title 1
- 238000005336 cracking Methods 0.000 abstract 3
- 229910052787 antimony Inorganic materials 0.000 abstract 2
- 229910052802 copper Inorganic materials 0.000 abstract 2
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 229910052748 manganese Inorganic materials 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- 229910052750 molybdenum Inorganic materials 0.000 abstract 2
- 229910052718 tin Inorganic materials 0.000 abstract 2
- 229910052725 zinc Inorganic materials 0.000 abstract 2
- 229910052726 zirconium Inorganic materials 0.000 abstract 2
- 125000000129 anionic group Chemical group 0.000 abstract 1
- 238000009835 boiling Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 150000002118 epoxides Chemical class 0.000 abstract 1
- 150000002222 fluorine compounds Chemical class 0.000 abstract 1
- 150000004820 halides Chemical class 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000011065 in-situ storage Methods 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 239000010702 perfluoropolyether Substances 0.000 abstract 1
- 238000007539 photo-oxidation reaction Methods 0.000 abstract 1
- 229910052719 titanium Inorganic materials 0.000 abstract 1
- 229910052720 vanadium Inorganic materials 0.000 abstract 1
Landscapes
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A process is claimed for cracking perfluoropolyethers (I) obtd. from photo-oxidation of perfluoro-olefins or by anionic polymerisation of their epoxides, comprising heating (I) to 150-380 deg.C in the presence of 0.1-10 wt.% catalyst comprising: a) oxides of Ti, Cr, Mn, Fe, Co, Ni, V, Cu, Mo, Sn, Sb, Zr or Zn; or b) fluorides or oxyfluorides of Co, Mn, Fe, Cu, Mo, Sn, Sb, Zr or Zn. (I) so prepd. are also claimed. The fluoride or oxyfluoride catalyst is pref. prepd. in situ by reacting the corresponding halides in the presence of F. (I) is pref. neutralised before being cracked. The temp. and pressure in the cracking process are pref. adjusted so as to maintain the reaction mixt. boiling and the distillate is pref. fractionated on a column to obtain a top distillate of a predetermined mol. wt. while the fraction having a higher mol.wt. is recycled to the cracking reactor.
Priority Applications (11)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT22902/85A IT1190423B (en) | 1985-11-19 | 1985-11-19 | Metal oxide, fluoride or oxyfluoride catalyst |
| US06/929,832 US4788257A (en) | 1985-11-19 | 1986-11-13 | Process for preparing regulated molecular weight perfluoro-polyethers having neutral and functional end groups |
| ZA868626A ZA868626B (en) | 1985-11-19 | 1986-11-13 | Process for preparing regulated molecular weight perfluoro-polyethers having neutral and functional end groups |
| AU65332/86A AU593853B2 (en) | 1985-11-19 | 1986-11-14 | Process for preparing regulated molecular weight perfluoropolyethers having neutral and functional end groups |
| IL80641A IL80641A (en) | 1985-11-19 | 1986-11-14 | Preparation of regulated low molecular weight perfluoropolyethers having neutral and functional end groups using metal oxide,fluoride or oxyfluoride catalyst |
| DE8686116015T DE3680869D1 (en) | 1985-11-19 | 1986-11-18 | METHOD FOR THE PRODUCTION OF PERFLUORPOLYAETHERS WITH A SPECIFIC MOLECULE SIZE AND WITH NEUTRAL AND FUNCTIONAL END GROUPS. |
| CA000523245A CA1305494C (en) | 1985-11-19 | 1986-11-18 | Process for preparing regulated molecular weight perfluoropolyethershaving neutral and functional end groups |
| EP86116015A EP0223238B1 (en) | 1985-11-19 | 1986-11-18 | Process for preparing perfluoropolyethers of regulated molecular weight having neutral and functional end groups |
| ES86116015T ES2025052B3 (en) | 1985-11-19 | 1986-11-18 | METHOD FOR THE PREPARATION OF PERFLUOROPOLIESOLES OF REGULATED MOLECULAR WEIGHT THAT HAVE FINALS OF NEUTRAL AND FUNCTIONAL GROUPS. |
| JP61273064A JPH085958B2 (en) | 1985-11-19 | 1986-11-18 | Process for producing perfluoropolyether with controlled molecular weight having neutral functional end groups |
| KR1019860009754A KR950003118B1 (en) | 1985-11-19 | 1986-11-18 | Method for producing a perfluoropolyether having a neutral terminal functional group and controlled molecular weight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT22902/85A IT1190423B (en) | 1985-11-19 | 1985-11-19 | Metal oxide, fluoride or oxyfluoride catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IT8522902A0 IT8522902A0 (en) | 1985-11-19 |
| IT1190423B true IT1190423B (en) | 1988-02-16 |
Family
ID=11201710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT22902/85A IT1190423B (en) | 1985-11-19 | 1985-11-19 | Metal oxide, fluoride or oxyfluoride catalyst |
Country Status (2)
| Country | Link |
|---|---|
| IT (1) | IT1190423B (en) |
| ZA (1) | ZA868626B (en) |
-
1985
- 1985-11-19 IT IT22902/85A patent/IT1190423B/en active
-
1986
- 1986-11-13 ZA ZA868626A patent/ZA868626B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ZA868626B (en) | 1987-06-24 |
| IT8522902A0 (en) | 1985-11-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19931129 |