US4054537A
Expired / Lapsed
US
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Process for synthesizing compositions containing smectite-type clays and gellants produced thereby
Assignee: Baroid Technology Inc
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Filing: 1976-08-02
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Granted: 1977-10-18
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Expires: 1996-08-02
Abstract
Abstract This invention provides a process for synthesizing compositions containing trioctahedral smectite-type clays which contain fluorine within their layer lattices. In particular, the invention provides a process for synthesizing compositions having mole ratios of Li, Na, Mg and Si, expressed as oxides, and F of:
Inventors
- 👤 Alan C. Wright
- 👤 Joseph Paul Rupert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:46
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/36; C01B33/38; C01B33/44; B; B01; B01J; B01J13/00; B01J13/0052; B01J13/0056; B01J19/00; B01J19/06; B01J21/00; B01J21/16; C01B33/40; C01B33/405; C09; C09D; C09D7/00; C09D7/40; C09D7/43; C08; C08K; C08K3/00; C08K3/16; C08K3/34; C08K3/346
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
179 words
A process for synthesizing a composition containing a fluorine-containing trioctahedral smectite-type clay, said composition containing mole ratios of Li, Na, Mg and Si expressed as oxides, and F, of aLi.sub.2 O : bNa.sub.2 O : cMgO : dF : 8SiO.sub.2 where 0≦a< 1.2, 0≦b<0.60, 4.75≦c<7, 0<d<4, 0≦a+b<1.4, 5.5<a+b+c<8, and where c≦6 when a+b=0, said process comprising: a. forming an aqueous suspension containing from 12% to 35% solids by weight, the solids having the chemical composition represented by the formula above, by: (i) combining and mixing magnesium oxide, water, hydrofluoric acid, and a base selected from the group consisting of lithium hydroxide, sodium hydroxide, and mixtures thereof, until the base is dissolved; and (ii) adding a silica sol; b. agitating and heating the suspension until a viscous slurry is obtained from which no solids settle out; c. allowing the slurry to gel; d, hydrothermally reacting the gell under autogenous pressure at a temperature within the range from 85° C to about 250° C for a period of time sufficient to form said trioctahedral smectite-type clay; and e. drying the composition.
Claim 2
Dependent Claim
179 words
A process for synthesizing a composition containing a fluorine-containing trioctahedral smectite-type clay, said composition containing mole ratios of Li, Na, Mg and Si expressed as oxides, and F, of aLi.sub.2 O : bNa.sub.2 O : cMgO : dF : 8SiO.sub.2 where 0≦a< 1.2, 0≦b<0.60, 4.75≦c<7, 0<d<4, 0≦a+b<1.4, 5.5<a+b+c<8, and where c≦6 when a+b=0, said process comprising: a. forming an aqueous suspension containing from 12% to 35% solids by weight, the solids having the chemical composition represented by the formula above, by: (i) combining and mixing magnesium oxide, water, hydrofluoric acid, and a base selected from the group consisting of lithium hydroxide, sodium hydroxide, and mixtures thereof, until the base is dissolved; and (ii) adding a silica sol; b. agitating and heating the suspension until a viscous slurry is obtained from which no solids settle out; c. allowing the slurry to gel; d, hydrothermally reacting the gell under autogenous pressure at a temperature within the range from 85° C to about 250° C for a period of time sufficient to form said trioctahedral smectite-type clay; and e. drying the composition.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein the apparant-viscosity of the viscous slurry is at least 10 centipoises.
Claim 4
Dependent Claim
28 words
The process of claim 1 wherein said hydrothermal treatment is conducted at a temperature within the range from 85° C to 165° C for 4 to 120 hours.
Claim 5
Dependent Claim
18 words
The process of claim 1 wherein said composition is dried at a temperature less than about 250° C.
Claim 6
Dependent Claim
42 words
The process of claim 4 wherein the apparent viscosity of the viscous slurry is at least 15 centipoises, and wherein said hydrothermal treatment is conducted at a temperature within the range from 85° C to 165° C for 4 to 120 hours.
Claim 7
Dependent Claim
14 words
The process of claim 1 wherein 0.25≦a<1.1, 0<b<0.6, 5.85≦c<7.0, 0.5<d≦3.5, 0.5<a+b<1.3, and 6.5<a+b+c< 8.0.
Claim 8
Dependent Claim
27 words
The process of claim 6 wherein said magnesium oxide, said hydrofluoric acid, and at least a portion of said water are mixed together before adding said base.
Claim 9
Dependent Claim
18 words
The process of claim 7 wherein the apparent vicosity of the vicous slurry is at least 10 centipoises.
Claim 10
Dependent Claim
28 words
The process of claim 7 wherein said hydrothermal treatment is conducted at a temperature within the range from 85° C to 165° C for 4 to 120 hours.
Claim 11
Dependent Claim
18 words
The process of claim 7 wherein said composition is dried at a temperature less than about 250° C.
Claim 12
Dependent Claim
42 words
The process of claim 10 wherein the apparent viscosity of rthe viscous slurry is at least 15 centipoises, and wherein said hydrothermal treatment is conducted at a temperature within the range from 85° C to 165° C for 4 to 120 hours.
Claim 13
Dependent Claim
13 words
The process of claim 1 wherein 0.25<a<1.1, 0.1≦b<0.50, 5.85≦c<6.5, 1.5<d<3.5, 0.6<+b<1.3, and 6.5<a+b+c<7.5.
Claim 14
Dependent Claim
27 words
The process of claim 12 wherein said magnesum oxide, said hydrofluoroic acid, and at least a portion of said water are mixed together before adding said base.
Claim 15
Dependent Claim
18 words
The process of claim 13 wherein the apparent viscosity of the viscous slurry is at least 10 centipoises.
Claim 16
Dependent Claim
18 words
The process of claim 13 wherein said solid is dried at a temperature leas than about 250° C.
Claim 17
Dependent Claim
25 words
The process of claim 13 wherein said hydrothermal treatment is conducted at a temperature within the range from 85° C for 4 to 120 hours.
Claim 18
Dependent Claim
32 words
The process of claim 16 wherein the apparent viscosity of the viscous slurry is at least 15 centipoises and wherein said solid is dried at a temperature less than about 250° C.
Claim 19
Dependent Claim
9 words
The product produced by the process of claim 6.
Claim 20
Dependent Claim
9 words
The product produced by the process of claim 9.
Claim 21
Dependent Claim
9 words
The product produced by the process of claim 10.
Claim 22
Dependent Claim
9 words
The product produced by the process of claim 12.
Claim 23
Dependent Claim
9 words
The product produced by the process of claim 15.
Claim 24
Dependent Claim
9 words
The product produced by the process of claim 16.
Claim 25
Dependent Claim
9 words
The product produced by the process of claim 17.
Claim 26
Dependent Claim
173 words
A process for synthesizing a composition containing a fluorine-containing trioctahedral smectite-type clay, said composition containing mole ratios of Li, Na, Mg and Si, expressed as oxides, and F, of aLi.sub.2 O : bNa.sub.2 O : cMgO : dF : 8SiO.sub.2 where 0.25≦a<1.1, 0≦b<0.60, 5.0≦c<6.75, 0.5<d<4, 0.60≦a+b<1.4 and 6.0<a+b+c<8, said process comprising: a. forming an aqueous suspension containing from 12% to 35% solids by weight, the solids having the chemical composition represented by the formula above, by: (i) combining and mixing magnesium oxide, water, hydrofluoric acid, and a base selected from the group consisting of lithium hydroxide, sodium hydroxide, and mixtures thereof, until the base is dissolved; and (ii) adding a silica sol; b. agiating and heating the suspension until a viscous slurry is obtained from which no solids settle out; c. allowing the slurry to gel; d. hydrothermally reacting the gel under autogenous pressure at a temperature within the range from 85° C to about 250° C for 4 to 120 hours to form said trioctahedral smectite-type clay; and e. drying the composition.
Claim 27
Dependent Claim
173 words
A process for synthesizing a composition containing a fluorine-containing trioctahedral smectite-type clay, said composition containing mole ratios of Li, Na, Mg and Si, expressed as oxides, and F, of aLi.sub.2 O : bNa.sub.2 O : cMgO : dF : 8SiO.sub.2 where 0.25≦a<1.1, 0≦b<0.60, 5.0≦c<6.75, 0.5<d<4, 0.60≦a+b<1.4 and 6.0<a+b+c<8, said process comprising: a. forming an aqueous suspension containing from 12% to 35% solids by weight, the solids having the chemical composition represented by the formula above, by: (i) combining and mixing magnesium oxide, water, hydrofluoric acid, and a base selected from the group consisting of lithium hydroxide, sodium hydroxide, and mixtures thereof, until the base is dissolved; and (ii) adding a silica sol; b. agiating and heating the suspension until a viscous slurry is obtained from which no solids settle out; c. allowing the slurry to gel; d. hydrothermally reacting the gel under autogenous pressure at a temperature within the range from 85° C to about 250° C for 4 to 120 hours to form said trioctahedral smectite-type clay; and e. drying the composition.
Claim 28
Dependent Claim
18 words
The process of claim 25 wherein the apparent viscosity of the viscous slurry is at least 10 centipoises.
Claim 29
Dependent Claim
19 words
The process of claim 25 wherein said dryed composition is dried at a temperature less than about 250° C.
Claim 30
Dependent Claim
9 words
The product produced by the process of claim 25.
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) | 1980-10-17 | 1981-04-18 | 1981-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-17 | 1985-04-18 | 1985-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-17 | 1989-04-18 | 1989-10-18 | $7700.00 | Window Closed / Lapsed |