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US5030362A
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Process for stripping liquid systems and sparger system useful therefor
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1989-08-21
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Granted: 1991-07-09
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Expires: 2009-08-21
Abstract
Abstract Undesirable materials, such as unreacted raw materials and by-products, are stripped from liquid systems by delivering a compressed, inert gas through the pores of a sintered porous sparger element and into the liquid system in the form of very small gas micro bubbles.
Inventors
- 👤 Pauliran Da Silva
- 👤 Silvio Balestieri
- 👤 Francesco Cerbino
- 👤 Augusto P. Queiroz
- 👤 Theodore V. Kowalchyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:27
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/237; B01F23/2376; B01F23/23765; B01D; B01D47/00; B01D47/02; B01F23/231; B01F23/23105; B01F23/2312; B01F23/23123; B01F23/23126; B01F23/231265; Y; Y10; Y10S; Y10S261/00; Y10S261/75
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
88 words
A process for stripping water from a viscous liquid reaction mixture having an initial viscosity of at lest about 350 Cst at 100° C., consisting essentially of: introducing the viscous liquid reaction mixture into a tank; and feeding a stripping bas into the viscous reaction mixture through the pores of a sintered porous sparger element, said gas being in the form of micro gas bubbles as it is introduced into the reaction mixture; and, optionally mechanically stirring the reaction mixture while said gas bubbles are being introduced therein.
Claim 2
Dependent Claim
88 words
A process for stripping water from a viscous liquid reaction mixture having an initial viscosity of at lest about 350 Cst at 100° C., consisting essentially of: introducing the viscous liquid reaction mixture into a tank; and feeding a stripping bas into the viscous reaction mixture through the pores of a sintered porous sparger element, said gas being in the form of micro gas bubbles as it is introduced into the reaction mixture; and, optionally mechanically stirring the reaction mixture while said gas bubbles are being introduced therein.
Claim 3
Dependent Claim
25 words
The process of claim 1, wherein the initial viscosity of the reaction mixture is from about 750 Cst. to about 2000 Cst. at 100° C.
Claim 4
Dependent Claim
29 words
The process according to claim 2, wherein the reaction mixture being stripped is a zinc dialkyldithio phosphate composition which is adaptable for use as an additive in oleaginous compositions.
Claim 5
Dependent Claim
29 words
The process according to claim 2, wherein the reaction mixture being stripped is a an ashless or ash containing dispersant suitable for use as an additive in oleaginous compositions.
Claim 6
Dependent Claim
26 words
The process according to claim 2, wherein the reaction mixture being stripped is a multi-functional viscosity modifier suitable for use as an additive in oleaginous compositions.
Claim 7
Dependent Claim
46 words
The process according to claim 1, wherein the sintered porous sparger element is composed of a material selected from the group consisting of metal, ceramic, glass and plastic and is characterized by a pore size on the order of from about 5 to about 55 microns.
Claim 8
Dependent Claim
16 words
The process according to claim 6, wherein the sintered porous sparger element is composed of metal.
Claim 9
Dependent Claim
22 words
The process according to any one of claims 1-7, wherein the stripping gas is inert with respect to the liquid being stripped.
Claim 10
Dependent Claim
11 words
The process of claim 8, wherein the stripping gas comprises nitrogen.
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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) | 1994-07-08 | 1995-01-07 | 1995-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-08 | 1999-01-07 | 1999-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-08 | 2003-01-07 | 2003-07-09 | $7700.00 | Window Closed / Lapsed |