US4715987A
Expired / Lapsed
US
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Method of treating phyllosilicates
Assignee: Corning Glass Works
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Filing: 1986-05-12
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Granted: 1987-12-29
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Expires: 2006-05-12
Abstract
Abstract This invention relates to a method for forming a product from a naturally occurring phyllosilicate, the method comprising the steps of: (a) exposing the phyllosilicate to a source of exchangeable cations to effect a change in the chemical makeup of the phyllosilicate interlayer by ion transfer; (b) exposing the ion-exchanged phyllosilicate to an expanding agent selected from the group consisting of a primary aminocarboxy acid, lysine orotate, and glycylglycine to expand the cell spacing and cause gel formation; (c) flocculating the gel; (d) forming a gel-floc interface; and (e) withdrawing the flocculated gel from that interface.
Inventors
- 👤 Hermann L. Rittler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:49
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C04; C04B; C04B14/00; C04B14/02; C04B14/04; C04B14/20; C04B14/206
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
81 words
A method of forming a product from a naturally-occurring phyllosilicate which comprises exposing the phyllosilicate to a source of exchangeable ions to effect a change in the chemical makeup of the phyllosilicate interlayer by ion transfer, exposing the ion-exchanged phyllosilicate to an expanding agent selected from the group consisting of a primary aminocarboxy acid, lysine orotate, and glycylglycine to expand the cell structure and cause gel formation, flocculating the gel, forming gel-floc interface, and withdrawing flocculated gel from the gel-floc interface.
Claim 2
Independent Claim
81 words
A method of forming a product from a naturally-occurring phyllosilicate which comprises exposing the phyllosilicate to a source of exchangeable ions to effect a change in the chemical makeup of the phyllosilicate interlayer by ion transfer, exposing the ion-exchanged phyllosilicate to an expanding agent selected from the group consisting of a primary aminocarboxy acid, lysine orotate, and glycylglycine to expand the cell structure and cause gel formation, flocculating the gel, forming gel-floc interface, and withdrawing flocculated gel from the gel-floc interface.
Claim 3
Dependent Claim
12 words
The method according to claim 1 wherein the naturally-occurring phyllosilicate is vermiculite.
Claim 4
Dependent Claim
12 words
A method according to claim 1 wherein the naturally-occurring phyllosilicate is montmorillonite.
Claim 5
Dependent Claim
26 words
A method according to claim 1 wherein the source of exchangeable cations to which the phyllosilicate is exposed is an aqueous solution of an inorganic salt.
Claim 6
Dependent Claim
12 words
A method according to claim 4 wherein the salt is magnesium chloride.
Claim 7
Dependent Claim
24 words
A method according to claim 1 wherein the source of exchangeable cations to which the phyllosilicate is exposed is a molten inorganic salt bath.
Claim 8
Dependent Claim
16 words
A method according to claim 6 wherein the salt bath is a mixture of sodium salts.
Claim 9
Dependent Claim
26 words
A method according to claim 1 wherein the ion-exchanged material is freed of contaminating salts and dried at a temperature in the range of 80°-800° C.
Claim 10
Dependent Claim
12 words
A method according to claim 1 wherein the aminocarboxy acid is beta-alanine.
Claim 11
Dependent Claim
21 words
A method according to claim 1 wherein the gel is exposed to a potassium ion containing bath to flocculate the gel.
Claim 12
Dependent Claim
34 words
A method according to claim 1 wherein the gel is introduced into an ion exchange bath in a thin stream to form a floc-gel interface from which a film of flocculated gel is withdrawn.
Claim 13
Dependent Claim
38 words
A method according to claim 1 wherein the gel formed from the natural phyllosilicate has a gel of a synthetic mica added prior to flocculation and the mixture introduced into the ion exchange bath to flocculate the gel.
Claim 14
Dependent Claim
19 words
A method according to claim 1 wherein the ion exchange bath is an aqueous solution of a potassium salt.
References Cited (Backward Citations)
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Cited
US4517112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |