US5143585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing organic solvents
Assignee: Konica Minolta Inc
•
Filing: 1989-09-15
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Granted: 1992-09-01
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Expires: 2009-09-15
Abstract
Abstract An organic solvent having a boiling point lower than that of water is removed from liquid containig water and the organic solvent contained in a tank by exhausting air in the tank, wherein an air pressure in the tank is kept about vapor pressure level of the liquid.
Inventors
- 👤 Kazuyoshi Ichikawa
- 👤 Shinichi Suzuki
- 👤 Sanae Oyama
- 👤 Hideaki Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:55
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/22; B01D1/222; B01D3/00; B01D3/10; B01D3/34; B01D3/343; Y; Y10; Y10S; Y10S159/00; Y10S159/16; Y10S203/00; Y10S203/22
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
83 words
A method of removing, during distillation, an organic solvent having a boiling point below that of water from a liquid having a changing vapor pressure and containing water and an organic solvent, which liquid is contained in a tank, said method comprising removing air from said tank, adjusting an air pressure in said tank fluctuating within the range of 2 to 20 mmHg above and below said vapor pressure within a short period of time so that bubble formation can be substantially prevented
Claim 2
Independent Claim
83 words
A method of removing, during distillation, an organic solvent having a boiling point below that of water from a liquid having a changing vapor pressure and containing water and an organic solvent, which liquid is contained in a tank, said method comprising removing air from said tank, adjusting an air pressure in said tank fluctuating within the range of 2 to 20 mmHg above and below said vapor pressure within a short period of time so that bubble formation can be substantially prevented
Claim 3
Dependent Claim
19 words
The method of removing organic solvent as claimed in claim 1 wherein said period is not over 5 seconds.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein said organic solvent is introduced into said water.
Claim 5
Dependent Claim
21 words
The method of claim 3 wherein said organic solvent is introduced at a velocity of 30 to 45 liters per minute.
Claim 6
Dependent Claim
22 words
The method of claim 3 wherein said liquid has a viscosity which is adjusted by introduction of a high molecular weight substance.
Claim 7
Dependent Claim
10 words
The method of claim 5 wherein said substance is gelatin.
Claim 8
Dependent Claim
43 words
The method of claim 5 wherein said substance is selected from the group consisting of gelatin, gelatin derivatives, graft polymers of gelatin; monomers or copolymers of polyvinyl alcohol, polyvinyl alcohol-partial acetal, poly-N-vinyl pyrolidone, polyacrylic acid, polymethacrylic acid, polyacylamide, polyvinyl imidazole, and polyvinyl pyrazole.
Claim 9
Dependent Claim
16 words
The method of claim 1 wherein said organic solvent and said water are mixed under agitation.
Claim 10
Dependent Claim
18 words
The method of claim 1 wherein said liquid has a viscosity of at least 1000 cp after emulsification.
Claim 11
Dependent Claim
13 words
The method of claim 9 wherein said viscosity is 3,000 to 100,000 cp.
Claim 12
Dependent Claim
13 words
The method of claim 10 wherein said viscosity is 5,000 to 50,000 cp.
Claim 13
Dependent Claim
21 words
The method of claim 9 wherein said viscosity is adjusted by varying the ratio of said organic solvent to said water.
Claim 14
Dependent Claim
10 words
The method of claim 1 wherein said liquid is heated.
Claim 15
Dependent Claim
27 words
The method of claim 1 wherein there is a heater below the surface of said liquid and a cooling jacket extending both above and below said surface.
Claim 16
Dependent Claim
36 words
The method of claim 14 wherein said organic solvent is ethyl acetate, said heater heats to a temperature of 60° to 65° C., and said cooling jacket cools to a temperature of 5° to 30° C.
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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) | 1995-09-01 | 1996-03-02 | 1996-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-01 | 2000-03-02 | 2000-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-01 | 2004-03-02 | 2004-09-01 | $7700.00 | Window Closed / Lapsed |