Media milling
First Claim
1. A process for preparing a dispersion of solid particles of a milled substrate in a fluid carrier comprising the steps of:
- (a) providing a plurality of large size milling media to the milling chamber of a media mill and forming a depth filter therefrom on an exit screen or separator in the milling chamber;
(b) adding to said milling chamber a plurality of small size milling media optionally containing additional large size milling media, a conglomerate of a solid substance comprising a substrate to be milled and optionally one or more than one surface active substance, and a fluid carrier;
(c) milling said conglomerate in said milling chamber to produce very small milled substrate product particles; and
(d) continuously removing or separating said milled substrate particles suspended in said fluid carrier from the media through said depth filter;
wherein;
the exit screen or separator comprises openings of size S0;
the large size media have a size distribution S1 of which all are larger than S0;
the small size media have a size distribution S2 which are smaller than S0;
the very small milled substrate particles have a size distribution S3 and are smaller than all of the small media; and
the large size media and the small size media are retained in the milling chamber.
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Accused Products
Abstract
This invention describes a process for preparing a dispersion of solid particles of a milled substrate in a fluid carrier comprising the steps of (a) providing a plurality of large size milling media to the milling chamber of a media mill and forming a depth filter therefrom on an exit screen or separator in the milling chamber; (b) adding to said milling chamber a plurality of small size milling media optionally containing additional large size milling media, a conglomerate of a solid substance comprising a substrate to be milled and optionally one or more than one surface active substance, and a fluid carrier; (c) milling said conglomerate in said milling chamber to produce very small milled substrate product particles; and (d) separating said milled substrate particles suspended in said fluid carrier from the media through said depth filter; wherein the exit screen comprises openings of size S0; the large size media have a size distribution S1 of which all are larger than S0; the small size media have a size distribution S2 which are smaller than S0; the very small milled substrate particles have a size distribution S3 and are smaller than all of the small media; and the large size media and the small size media are essentially retained in the milling chamber.
141 Citations
31 Claims
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1. A process for preparing a dispersion of solid particles of a milled substrate in a fluid carrier comprising the steps of:
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(a) providing a plurality of large size milling media to the milling chamber of a media mill and forming a depth filter therefrom on an exit screen or separator in the milling chamber;
(b) adding to said milling chamber a plurality of small size milling media optionally containing additional large size milling media, a conglomerate of a solid substance comprising a substrate to be milled and optionally one or more than one surface active substance, and a fluid carrier;
(c) milling said conglomerate in said milling chamber to produce very small milled substrate product particles; and
(d) continuously removing or separating said milled substrate particles suspended in said fluid carrier from the media through said depth filter;
wherein;
the exit screen or separator comprises openings of size S0;
the large size media have a size distribution S1 of which all are larger than S0;
the small size media have a size distribution S2 which are smaller than S0;
the very small milled substrate particles have a size distribution S3 and are smaller than all of the small media; and
the large size media and the small size media are retained in the milling chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification