Patent US3933633A successfully refreshed from Google Patents.
US3933633A
Expired / Lapsed
US
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Method for separating vinyl chloride
Assignee: Mitsui Kinzoku Co Ltd
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Filing: 1974-05-14
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Granted: 1976-01-20
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Expires: 1994-05-14
Abstract
Abstract A method for separating vinyl chloride from a mixture of vinyl chloride with other non-plastic substances such as sand and soil, metals, glass or rubbers which comprises introducing gas bubbles into a dispersion of the vinyl chloride mixture in an aqueous liquid medium such as water or salt water and containing a flotation agent such as pine oil thereby to float the vinyl chloride and collect it.
Inventors
- 👤 Kozo Saitoh
- 👤 Sumio Izumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:47
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/06; B; B03; B03D; B03D1/00; B03D1/14; B29; B29B; B29B17/00; B29B17/02; B29B2017/0213; B29B2017/0217; B29B2017/0248; B29K; B29K2021/00; B29K2105/00; B29K2105/06; B29K2105/065; B29K2705/00; B29K2705/08; B29K2705/10; B29L; B29L2031/00; B29L2031/707; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
99 words
A method for separating vinyl chloride from a mixture of vinyl chloride with other non-plastic substances selected from the group consisting of soil, sand, metals, glass, rubber and a mixture thereof, which comprises introducing gas bubbles into a dispersion of the vinyl chloride mixture in an aqueous liquid medium, and adding to said dispersion a flotation agent selected from the group consisting of pine oil, kerosene, cresylic acid, eucalyptus oil, camphor oil, a higher alcohol, methyl isobutyl carbinol, pyridine, o-toluidine and a mixture thereof thereby to float the vinyl chloride due to the adherence of the gas bubbles thereto.
Claim 2
Independent Claim
99 words
A method for separating vinyl chloride from a mixture of vinyl chloride with other non-plastic substances selected from the group consisting of soil, sand, metals, glass, rubber and a mixture thereof, which comprises introducing gas bubbles into a dispersion of the vinyl chloride mixture in an aqueous liquid medium, and adding to said dispersion a flotation agent selected from the group consisting of pine oil, kerosene, cresylic acid, eucalyptus oil, camphor oil, a higher alcohol, methyl isobutyl carbinol, pyridine, o-toluidine and a mixture thereof thereby to float the vinyl chloride due to the adherence of the gas bubbles thereto.
Claim 3
Dependent Claim
23 words
The method of claim 1, wherein the amount of said flotation agent is up to about 1,000 grams per ton of said mixture.
Claim 4
Dependent Claim
31 words
The method of claim 1, wherein the proportion of said vinyl chloride mixture is about 1 to 30 parts by weight per 100 parts by weight of said aqueous liquid medium.
Claim 5
Dependent Claim
15 words
The method of claim 1, wherein said aqueous liquid medium is water or salt water.
Claim 6
Dependent Claim
12 words
The method of claim 1, wherein said aqueous liquid medium is warmed.
Claim 7
Dependent Claim
12 words
The method of claim 1, wherein said flotation agent is pine oil.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |