US4298399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for salt grinding of pigments
Assignee: International Pigment Processing Corp
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Filing: 1980-06-11
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Granted: 1981-11-03
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Expires: 2000-06-11
Abstract
Abstract A salt grinding process for comminuting crude pigments in which corn syrup, corn syrup solids or molasses are added to a blend of crude pigment and salt to permit the process to be carried out in a continuous process as well as in a batch process with less expended energy and less salt than when the corn syrup or molasses is not present.
Inventors
- 👤 Francis A. Formica
- 👤 James B. Izenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:14
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0001; C09B67/0002; B; B02; B02C; B02C23/00; B02C23/06; C09B67/0022
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
148 words
In a process in which a finely divided crystalline organic pigment is produced from a coarser crude crystalline organic pigment by grinding the coarse pigment in the presence of a water soluble inorganic salt as the grinding media and a water soluble conditioning agent as the grinding aid and thereafter separating the resulting finely divided organic pigment from said salt and said conditioning agent, wherein the proportion of inorganic salt to pigment is from about 3 and up to 20 parts by weight of salt for each part by weight or organic pigment, the improvement which comprises providing as the conditioning agent a water soluble viscous material selected from the group consisting of corn syrup, corn syrup solids and molasses and the proportion of conditioning agent to pigment is between about 1/2 and 4 parts by weight of conditioning agent to each part by weight of organic pigment.
Claim 2
Dependent Claim
148 words
In a process in which a finely divided crystalline organic pigment is produced from a coarser crude crystalline organic pigment by grinding the coarse pigment in the presence of a water soluble inorganic salt as the grinding media and a water soluble conditioning agent as the grinding aid and thereafter separating the resulting finely divided organic pigment from said salt and said conditioning agent, wherein the proportion of inorganic salt to pigment is from about 3 and up to 20 parts by weight of salt for each part by weight or organic pigment, the improvement which comprises providing as the conditioning agent a water soluble viscous material selected from the group consisting of corn syrup, corn syrup solids and molasses and the proportion of conditioning agent to pigment is between about 1/2 and 4 parts by weight of conditioning agent to each part by weight of organic pigment.
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein the conditioning agent is diluted with a diluent selected from the group consisting of water, glycols, polyglycols and mixtures thereof.
Claim 4
Dependent Claim
31 words
The process of claim 1 in which the proportion of salt to pigment is between about 4 and 6 parts by weight of salt for each part by weight of pigment.
Claim 5
Dependent Claim
10 words
The process of claim in which the salt is NaCl.
Claim 6
Dependent Claim
31 words
The process of claim 1 in which the proportion of conditioning agent is between 1 and 2 parts by weight of conditioning agent to each part by weight of organic pigment.
Claim 7
Dependent Claim
12 words
The process of claim 1 wherein the organic pigment is a phthalocyanine.
Claim 8
Dependent Claim
29 words
The process of claim 1 wherein the organic pigment, salt and conditioning agent are fed continuously into a continuous mixer and the product is continuously withdrawn from said mixer.
References Cited (Backward Citations)
US2155326A
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US2259457A
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US2402167A
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GB569402A
Cited
US2982666A
Cited
US4196016A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |