Patent US5284933A successfully refreshed from Google Patents.
Patent US1379934A successfully refreshed from Google Patents.
EP0293534A2
Expired / Lapsed
EP
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Grinding method
Assignee: Ciba Specialty Chemicals Water Treatments Ltd
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Filing: 1987-11-06
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Granted: —
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Expires: 2007-11-06
Abstract
Abstract Solid material is ground in a grinding mill and caking of the ground particles is substantially eliminated by including particulate water absorbent polymeric material in the mill.
Inventors
- 👤 Eugene P. Bublik
- 👤 Sbigniew Sartowski
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 21:44
CPC Classifications
B; B02; B02C; B02C23/00; B02C23/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
46 words
A process in which a friable, particulate, solid material is ground in a grinding mill to form ground particles, characterised in that caking of the ground particles is substantially prevented by including in the mill particulate water absorbent polymeric material that remains non-sticky throughout the process.
Claim 2
Dependent Claim
46 words
A process in which a friable, particulate, solid material is ground in a grinding mill to form ground particles, characterised in that caking of the ground particles is substantially prevented by including in the mill particulate water absorbent polymeric material that remains non-sticky throughout the process.
Claim 3
Dependent Claim
19 words
A process according to claim 1 in which the friable solid material has a free water content below 30%.
Claim 4
Dependent Claim
21 words
A process according to claim 1 in which the friable solid material has a free water content of 10 to 25%.
Claim 5
Dependent Claim
33 words
A process according to any preceding claim in which at least 90% by weight of the particulate water absorbent polymeric material is in the form of particles having a dry size below 50µm.
Claim 6
Dependent Claim
38 words
A process according to claim 4 in which the polymeric material is added to the mill or to the friable solid material while in the form of a dispersion of particulate polymeric material in a water immiscible liquid.
Claim 7
Dependent Claim
28 words
A process according to any preceding claim in which the polymeric material is a cross linked polymer formed from a water soluble ethylenically unsaturated monomer or monomer blend.
Claim 8
Dependent Claim
36 words
A process according to claim 6 in which the cross linked polymer is formed from 5 to 100 mole percent acrylic acid as free acid or water soluble salt and 0 to 95 mole percent acrylamide.
Claim 9
Dependent Claim
15 words
A process according to any preceding claim in which the grinding is by ball milling.
References Cited (Backward Citations)
No citation records indexed.
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