US4511710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halide removal from fluid organic materials
Assignee: Dow Chemical Co
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Filing: 1984-06-11
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Granted: 1985-04-16
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Expires: 2004-06-11
Abstract
Abstract Unwanted halogen values are removed from liquid resin, organic or hydrocarbon material by adding particulate crystalline lithium aluminate compounds to the liquid material to act as a halogen scavenger, then separating the crystalline aluminate compound from the liquid material.
Inventors
- 👤 Chun S. Wang
- 👤 Kyle B. Benkendorfer
- 👤 John L. Burba, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:47
CPC Classifications
C; C08; C08G; C08G85/00; C08G85/004; C01; C01B; C01B9/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
120 words
A method for reducing the halogen content of a liquid resin, organic or hydrocarbon material which contains unwanted halogen values, said method comprising intimately contacting said material with a halogen scavenger, then separating said scavenger from said material, wherein said scavenger comprises a particulate crystalline lithium aluminate compound which conforms, generally, to the empirical formula (LiX.sub.x).sub.y ·2Al(OH).sub.3 ·nH.sub.2 O where X is at lease one anion or negative-valence radical other than halide, x is an amount of X sufficient to substantially satisfy the valence requirements of Li in the crystal structure, y is a positive amount of Li at least sufficient to maintain the crystal structure, and n represents a numerical amount of zero or more for waters of hydration.
Claim 2
Independent Claim
120 words
A method for reducing the halogen content of a liquid resin, organic or hydrocarbon material which contains unwanted halogen values, said method comprising intimately contacting said material with a halogen scavenger, then separating said scavenger from said material, wherein said scavenger comprises a particulate crystalline lithium aluminate compound which conforms, generally, to the empirical formula (LiX.sub.x).sub.y ·2Al(OH).sub.3 ·nH.sub.2 O where X is at lease one anion or negative-valence radical other than halide, x is an amount of X sufficient to substantially satisfy the valence requirements of Li in the crystal structure, y is a positive amount of Li at least sufficient to maintain the crystal structure, and n represents a numerical amount of zero or more for waters of hydration.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein X is OH - .
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein X is RCOO - , with R representing an organic moiety having from 1 to about 24 carbon atoms.
Claim 5
Dependent Claim
46 words
The method of claim 1 wherein X is at least one negative-valence radical of the group comprising RSO 3 - , RPO 3 - , silicic acid anion, and organo-silicic acid anion, where R represents an organic moiety having from 1 to about 24 carbon atoms.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein X is the negative-valence radical of a fatty acid.
Claim 7
Dependent Claim
14 words
The method of claim 1 wherein X is the negative-valence radical of stearic acid.
Claim 8
Dependent Claim
26 words
The method of claim 1 wherein X represents, in the same crystal, both OH - anions and RCOO - radicals, where R is an organic moiety.
Claim 9
Dependent Claim
23 words
The method of claim 1 wherein the liquid material is an epoxy resin, an epoxy-novolac resin, or a precursor for an epoxy resin.
Claim 10
Dependent Claim
31 words
The method of claim 1 wherein the liquid material is an epoxy resin material at an elevated temperature, and wherein the X represents the RCOO - radical of a fatty acid.
Claim 11
Dependent Claim
30 words
The method of claim 1 wherein the liquid material is an epoxy resin material which has been thinned by a solvent and wherein the X represents the OH - ion.
Claim 12
Dependent Claim
21 words
The method of claim 1 wherein the liquid material is a molten or dissolved thermosetting resin or polymer, or precursor thereof.
Claim 13
Dependent Claim
21 words
The method of claim 1 wherein the liquid material is a molten or dissolved thermoplastic resin or polymer, or precursor thereof.
Claim 14
Dependent Claim
19 words
The method of claim 1 wherein the liquid material is a non-aqueous organic or hydrocarbon having scavengeable halide values.
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) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |