Process for the recovery of antimony pentachloride from catalyst solutions
Abstract
Abstract THE INVENTION RELATES TO A PROCESS OF RECOVERING ANTIMONY PENTACHLORIDE FROM CATALYST SOLUTIONS USED FOR THE FLUORINATION OF CHLORINE CONTAINING HYDROCARBONS. THE PROCESS IS BASED UPON A THERMAL DECOMPOSITION OF ANTIMONY PENTACHLORIDE INTO ANTIMONY TRICHLORIDE AND CHLORINE AT A TEMPERATURE OF 60* TO 300*C. THE ORGANIC IMPURITIES ARE EXTRACTED FROM THE PRECIPITATED ANTIMONY TRICHLORIDE BY MEANS OF HALOGENATED HYDROCARBONS. THE REMAINING ANTIMONY TRICHLORIDE IS REOXIDATED WITH CHLORINE-WHICH MAY BE RECYCLED FROM THE STEP OF THE THERMAL DECOMPOSITION-AT AT TEMPERATURE OF FROM 60* TO 150* C. AND A PRESSURE OF ZERO TO FIVE ATMOSPHERES TO YIELD ANTIMONY PENTACHLORIDE WHICH IS REFINED BY DISTILLATION.
Inventors
- 👤 E Joerchel
- 👤 R Kohlhaas
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |