US3954491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of raw mix cement slurries having reduced water content
Assignee: Diamond Shamrock Corp
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Filing: 1974-10-21
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Granted: 1976-05-04
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Expires: 1994-10-21
Abstract
Abstract Addition of sodium naphthaleneformaldehyde sulfonate having a lowest elution volume of from about 61 to about 70% of a total elution volume by gel permeation chromatography to the raw mix slurry used in manufacture of cement by the wet process permits reduction of the water content of the raw mix slurry and conservation of the amount of fuel required to evaporate the water from the slurry during manufacture.
Inventors
- 👤 Norman F. Adrian
- 👤 Joseph P. Fleming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:00
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/36; C04B7/38; C04B7/42; C04B7/428
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
133 words
A process for the production of an aqueous slurry of comminuted argillaceous limestone material, which upon burning produces cement, the process comprising admixing with the limestone material present in the slurry, an effective amount of a sodium naphthaleneformaldehyde sulfonate having a lowest elution volume of from about 61 to about 70% of a total elution volume by gel permeation chromatography to reduce the water content of the slurry and to conserve the amount of fuel required to evaporate water from the slurry during burning wherein the effective amount is from about 0.025 to about 0.1% solids by weight of sulfonate salt based on percent solids present in the slurry and is added to a slurry wherein the water content is from 20 to about 50% by weight based on the total slurry weight.
Claim 2
Dependent Claim
133 words
A process for the production of an aqueous slurry of comminuted argillaceous limestone material, which upon burning produces cement, the process comprising admixing with the limestone material present in the slurry, an effective amount of a sodium naphthaleneformaldehyde sulfonate having a lowest elution volume of from about 61 to about 70% of a total elution volume by gel permeation chromatography to reduce the water content of the slurry and to conserve the amount of fuel required to evaporate water from the slurry during burning wherein the effective amount is from about 0.025 to about 0.1% solids by weight of sulfonate salt based on percent solids present in the slurry and is added to a slurry wherein the water content is from 20 to about 50% by weight based on the total slurry weight.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein the sodium naphthaleneformaldehyde sulfonate has a lowest elution volume of about 61%.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein the sodium naphthaleneformaldehyde sulfonate has a lowest elution volume of about 70%.
Claim 5
Dependent Claim
28 words
The process of claim 1 wherein the water content of the aqueous slurry is from about 30 to about 40% by weight based on the total slurry weight.
References Cited (Backward Citations)
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Cited
US2709661A
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US2905565A
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US3277162A
Cited
US3359225A
Cited
US3594203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |