US4222823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for processing chlorinated hydrocarbon residues
Assignee: Huels AG
•
Filing: 1976-09-03
•
Granted: 1980-09-16
•
Expires: 1996-09-03
Abstract
Abstract The processing of liquid chlorinated hydrocarbon residues, which may contain solids and which form viscous to solid deposits during the separation of readily boiling components, into (1) distillable organic components, (2) hydrogen chloride, and (3) solid matter with a low chlorine content, is improved by gently concentrating the residues in a first step and, in a second step, decomposing the residues at temperatures of about 200°-400° C., preferably 270°-330° C., with a continuous separation of the vapor phase components from the solid components.
Inventors
- 👤 Reinhold Wickbold
- 👤 Wolfgang H. E. Muller
- 👤 Hans Regner
- 👤 Gunter Scharein
- 👤 Franz Langheim
- 👤 Rolf Ruthemeier
- 👤 Karl-Hans Simmrock
- 👤 Rolf Baumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:04
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
88 words
In the method for the processing of liquid chlorinated hydrocarbon residues containing solids and forming viscous to solid deposits during the separation of readily boiling components into (1) distillable organic components, (2) hydrogen chloride, and (3) solid matter with a low chlorine content the improvement comprising gently concentrating said liquid chlorinated hydrocarbon residues in a first process step, removing concentrated residues and decomposing in a second process step said concentrated residues at temperatures of about 200°-400° C., followed by continuously separating the vapor-phase components from the solid components.
Claim 2
Dependent Claim
88 words
In the method for the processing of liquid chlorinated hydrocarbon residues containing solids and forming viscous to solid deposits during the separation of readily boiling components into (1) distillable organic components, (2) hydrogen chloride, and (3) solid matter with a low chlorine content the improvement comprising gently concentrating said liquid chlorinated hydrocarbon residues in a first process step, removing concentrated residues and decomposing in a second process step said concentrated residues at temperatures of about 200°-400° C., followed by continuously separating the vapor-phase components from the solid components.
Claim 3
Dependent Claim
16 words
The method of claim 1, wherein said first process step is conducted in a thin-film evaporator.
Claim 4
Dependent Claim
25 words
The method of claim 2, wherein 3 to 10 times the amount of the sump runoff is recycled into the sump of the thin-film evaporator.
Claim 5
Dependent Claim
28 words
The method of claim 3, wherein said residues are concentrated to a viscosity of 8-50 cp at 20° C. and a shearing velocity of 200 sec. -1 .
Claim 6
Dependent Claim
20 words
The method of claim 1, wherein said second process step is conducted in a continuously operating, heated, self-cleaning screw-type apparatus.
Claim 7
Dependent Claim
19 words
The method of claim 5, wherein said second process step is conducted in the presence of an inert gas.
Claim 8
Dependent Claim
22 words
The method of claim 6, wherein said inert gas is a gaseous stream conducted counter-currently to the product to be worked up.
Claim 9
Dependent Claim
11 words
The method of claim 7, wherein nitrogen is said inert gas.
Claim 10
Dependent Claim
20 words
The method of claim 1, wherein both process steps are conducted in successive zones of a heated, self-cleaning screw-type apparatus.
Claim 11
Dependent Claim
19 words
The method of claim 1, wherein said second process step is carried out at temperatures of about 270°-330° C.
Claim 12
Dependent Claim
14 words
The method of claim 4, wherein said viscosity is 10-15 cp at 20° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |