US4780143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for suppressing cement clinker dust emissions
Assignee: Veolia WTS USA Inc
•
Filing: 1987-04-24
•
Granted: 1988-10-25
•
Expires: 2007-04-24
Abstract
Abstract A method of suppressing dust generation emanating from cement clinker dust by applying a foamed dust control treatment thereto. The foam is provided with an effective defoaming agent which, upon slurrying of the clinker and other ingredients (e.g., sand, gypsum, aggregate) to form the desired mortar, inhibits foam formation in the mortar, thus not significantly increasing air entrapped in the slurried mortar.
Inventors
- 👤 Donald C. Roe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:42
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/36; C04B7/48; C04B2103/00; C04B2103/0068; C04B2103/0075; C04B2103/50
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
66 words
Method comprising suppressing dust generation emanating from cement clinker by applying foam to said clinker, said foam including an agent which exhibits antifoaming properties in cement mortar, grinding said clinker to form cement, and slurrying said cement with other ingredients to form slurried cement said antifoaming agent inhibiting foam formation in said slurried cement so as to not significantly increase air entrapped in said slurried cement.
Claim 2
Dependent Claim
66 words
Method comprising suppressing dust generation emanating from cement clinker by applying foam to said clinker, said foam including an agent which exhibits antifoaming properties in cement mortar, grinding said clinker to form cement, and slurrying said cement with other ingredients to form slurried cement said antifoaming agent inhibiting foam formation in said slurried cement so as to not significantly increase air entrapped in said slurried cement.
Claim 3
Dependent Claim
13 words
Method as recited in claim 1 wherein said foam comprises water and surfactant.
Claim 4
Dependent Claim
24 words
Method as recited in claim 2 wherein said surfactant comprises a member or members selected from the group consisting of anionic and nonionic surfactants.
Claim 5
Dependent Claim
15 words
A method as defined in claim 2 wherein said foam further comprises oil antifoaming agent.
Claim 6
Dependent Claim
24 words
A method as defined in claim 4 wherein said oil has an SUS viscosity at 38° C. of from about 60 to about 600.
Claim 7
Dependent Claim
24 words
A method as defined in claim 5 wherein said oil has an SUS viscosity at 38° C. of from about 60 to about 300.
Claim 8
Dependent Claim
32 words
A method as defined in claim 4 wherein between about 10 to 1,000 ppm of said oil per million parts of said clinker are applied to said clinker in said application step.
Claim 9
Dependent Claim
36 words
A method as recited in claim 4 wherein in said slurrying step said oil is diluted to about 1.5 to 200 ppm in said slurry so as to thereby inhibit foam formation in said slurried cement.
Claim 10
Dependent Claim
17 words
A method as recited in claim 2 wherein said foam further comprises effective fatty alcohol antifoaming agent.
Claim 11
Dependent Claim
56 words
Method comprising suppressing dust generation emanating from cement clinker by applying foam comprising water, surfactant and oil to said clinker, grinding said clinker to form cement, slurrying said cement with other ingredients to form slurried cement and inhibiting foam formation in said slurried cement so as to not significantly increase air entrapped in said slurried cement.
Claim 12
Dependent Claim
56 words
Method comprising suppressing dust generation emanating from cement clinker by applying foam comprising water, surfactant and oil to said clinker, grinding said clinker to form cement, slurrying said cement with other ingredients to form slurried cement and inhibiting foam formation in said slurried cement so as to not significantly increase air entrapped in said slurried cement.
Claim 13
Dependent Claim
25 words
A method as defined in claim 10 wherein the said oil has an SUS viscosity at 38° C. of from about 60 to about 600.
Claim 14
Dependent Claim
24 words
A method as defined in claim 11 wherein said oil has an SUS viscosity at 38° C. of from about 60 to about 300.
Claim 15
Dependent Claim
32 words
A method as defined in claim 10 wherein between about 10 to 1,000 ppm of said oil per million parts of said clinker are applied to said clinker in said application step.
Claim 16
Dependent Claim
36 words
A method as recited in claim 10 wherein in said slurrying step said oil is diluted to about 1.5 to 200 ppm in said slurry so as to thereby inhibit foam formation in said slurried cement.
References Cited (Backward Citations)
US943667A
Cited
GB602406A
Cited
US2621115A
Cited
US2646361A
Cited
US2854347A
Cited
US3811660A
Cited
SU453421A1
Cited
US3954662A
Cited
US4087572A
Cited
JPS5040491A
Cited
US4169170A
Cited
US3980136A
Cited
US3937283A
Cited
US4000992A
Cited
US4400220A
Cited
SU566788A1
Cited
SU589009A1
Cited
US4136050A
Cited
US4171276A
Cited
US4200413A
Cited
US4301119A
Cited
JPS5667523A
Cited
SU916764A1
Cited
SU934054A1
Cited
JPS5798579A
Cited
US4417992A
Cited
US4380459A
Cited
JPS5951993A
Cited
SU1078101A1
Cited
SU1133283A1
Cited
JPS59223781A
Cited
US4571116A
Cited
US4551261A
Cited
US4561905A
Cited
US4650598A
Cited
US4605568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |