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Patent US3970468A successfully refreshed from Google Patents.
US3970468A
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Sulfur emulsion in bituminous material
Assignee: Societe Nationale des Petroles dAquitaine SA
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Filing: 1974-05-14
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Granted: 1976-07-20
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Expires: 1994-05-14
Abstract
Abstract Process for dispersing molten sulphur in a hydrocarbon material, such as asphalt, tar and more particularly bitumen. The dispersion is effected in such a way as to produce an emulsion of sulphur in very fine particles, with dimensions not exceeding 10 microns, in the hydrocarbon material. A turbine with a gap or clearance of about 0.1 to 2.25 mm. is very useful for this purpose. The emulsions obtained are particularly suitable for road surfaces.
Inventors
- 👤 Claude Garrigues
- 👤 Jean Baptiste Signouret
- 👤 Claude Chambu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:46
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
102 words
The method of producing a stable emulsion of sulfur in a material selected from the group consisting of bitumens, asphalts, pitches and tars, wherein 15 to 45 parts by weight of molten sulfur are mixed at about 125°C to about 160°C with 100 parts by weight of said material under stirring, the stirring being carried out so as to disperse the molten sulfur, throughout said material, in the form of droplets the dimensions of which are between about 0.5 and 10 microns, the fluid mass thus obtained being then formed to a required shape and allowed to cool until it becomes solid.
Claim 2
Independent Claim
102 words
The method of producing a stable emulsion of sulfur in a material selected from the group consisting of bitumens, asphalts, pitches and tars, wherein 15 to 45 parts by weight of molten sulfur are mixed at about 125°C to about 160°C with 100 parts by weight of said material under stirring, the stirring being carried out so as to disperse the molten sulfur, throughout said material, in the form of droplets the dimensions of which are between about 0.5 and 10 microns, the fluid mass thus obtained being then formed to a required shape and allowed to cool until it becomes solid.
Claim 3
Dependent Claim
20 words
Method according to claim 1, wherein the average dimension of the droplets is of about 0.5 to about 5 microns.
Claim 4
Dependent Claim
42 words
Method according to claim 1, wherein the stirring is carried out by passing the mixture of sulfur with said material through the gap between the stator and the rotating rotor of a turbine, said gap being comprised between 0.1 and 2.25 mm.
Claim 5
Dependent Claim
13 words
Method according to claim 3, wherein said gap is 0.4 to 1.15 mm.
Claim 6
Dependent Claim
16 words
Method according to claim 4, wherein the rotor rotates at 7 000 to 13 000 r.p.m.
Claim 7
Dependent Claim
14 words
Method according to claim 1, wherein the temperature is about 130° to about 170°C.
Claim 8
Dependent Claim
28 words
Method according to claim 3, wherein said mixture enters the turbine when at about 140° to about 160°C and leaves the turbine at about 110° to about 140°C.
Claim 9
Dependent Claim
25 words
Method according to claim 3, wherein said mixture is passed several times through the gap between the stator and the rotating rotor of a turbine.
Claim 10
Dependent Claim
45 words
Method according to claim 1, wherein a mixture of sulfur with said material is first subjected to a primary dispersion and then the product obtained is passed through a gap of 0.1 to 2.25 mm between the stator and the rotating rotor of a turbine.
Claim 11
Dependent Claim
25 words
Method according to claim 4, wherein the proportion of sulfur is 20 to 45 parts by weight for 100 parts by weight of said material.
Claim 12
Dependent Claim
96 words
The composition of matter produced by the method according to claim 1, which comprises a solid mass of a material selected from the group consisting of bitumens, asphalts, pitches and tars, containing uniformly dispersed therein sulfur particles the dimensions of which are in the range of 0.5 to 10 microns, the amount of sulfur being of 15 to 45 parts by weight per 100 parts by weight of said material, and the viscosity of the mass at 80°C being substantially stronger than the viscosity at 80°C of the corresponding material when it does not contain sulfur.
Claim 13
Dependent Claim
113 words
A road paving composition produced by dispersing molten sulfur in bitumen at about 130°C to about 170°C, casting the dispersion onto the road and allowing it to cool, wherein the proportion of sulfur is 20 to 45 parts by weight per 100 parts by weight bitumen the sulfur is in the form of particles uniformly dispersed throughout the bitumen and having an average dimension of 0.5 to 5 microns, the viscosity of the coating at 80°C is substantially higher than the viscosity at 80°C of the same bitumen when it does not contain sulfur, while the viscosity at 160°C at the coating is substantially lower than that of the sulfurfree bitumen at 160°C.
Claim 14
Dependent Claim
113 words
A road paving composition produced by dispersing molten sulfur in bitumen at about 130°C to about 170°C, casting the dispersion onto the road and allowing it to cool, wherein the proportion of sulfur is 20 to 45 parts by weight per 100 parts by weight bitumen the sulfur is in the form of particles uniformly dispersed throughout the bitumen and having an average dimension of 0.5 to 5 microns, the viscosity of the coating at 80°C is substantially higher than the viscosity at 80°C of the same bitumen when it does not contain sulfur, while the viscosity at 160°C at the coating is substantially lower than that of the sulfurfree bitumen at 160°C.
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) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |