US 12,146,019 B2 · Washing process

Abstract

A process for washing a particulate substance comprising: (i) combining a particulate substance and a first washing medium in a first vessel to form a slurry and washing the particulate substance with said washing medium; (ii) transferring the slurry to a hydrocyclone; (iii) removing a first by-product stream depleted in particulate substance and a first product stream enriched in particulate substance from the hydrocyclone; (iv) transferring the first product stream to a second vessel and in the presence of a second washing medium forming a slurry and washing the particulate substance with said second washing medium e.g. by agitation thereof; (v) transferring the slurry to a hydrocyclone; (vi) removing a second by-product stream depleted in particulate substance and a second product stream enriched in particulate substance from the hydrocyclone.

Claims19

Dependent claims

A process for washing a particulate substance comprising:

(i) combining a particulate substance and a first washing medium in a first vessel to form a slurry and washing the particulate substance with said washing medium;
(ii) transferring the slurry to a hydrocyclone;
(iii) removing a first by-product stream depleted in particulate substance and a first product stream enriched in particulate substance from the hydrocyclone;
(iv) transferring the first product stream to a second vessel and in the presence of a second washing medium forming a slurry and washing the particulate substance with said second washing medium;
(v) transferring the slurry back to the hydrocyclone;
(vi) removing a second by-product stream depleted in particulate substance and a second product stream enriched in particulate substance from the hydrocyclone.

3 more elements

A process for separating solid olefin catalyst component particles from a medium in which they are present which process comprises:

(i) providing in a first vessel a slurry of a liquid medium and solid olefin catalyst component particles;
(ii) transferring the slurry into a hydrocyclone;
(iii) removing a first by-product stream depleted in solid olefin polymerization catalyst component particles and a first product stream enriched in solid olefin polymerization catalyst component particles from the hydrocyclone;
(iv) transferring the first product stream to a second vessel and in the presence of a washing medium to form a slurry and washing the solid olefin polymerization catalyst component particles with said washing medium;
(v) transferring the slurry back to the hydrocyclone;
(vi) removing a second by-product stream depleted in solid olefin polymerization catalyst component particles and a second product stream enriched in solid olefin polymerization catalyst component particles from the hydrocyclone.

3 more elements

Dependencies are inferred from the claim text.

Washing process

Life of this patent

Washing process

Life of this patent

Abstract

Claims19