Title:
METHOD OF MAKING PURIFIED PRECIPITATED CALCIUM CARBONATE FROM LIME MUD
Document Type and Number:
WIPO Patent Application WO/2021/080870
Kind Code:
A3
Abstract:
A method of making a purified precipitated calcium carbonate from lime mud can include admixing a lime mud cake with water and sodium carbonate to form a first slurry; heating the first slurry under conditions to age the slurry and form one or more of pirssonite, shortite, and gaylussite; separating a solid portion from the aged slurry; washing the solid portion under conditions sufficient to decompose the one or more of pirssonite, shortite, and gaylussite to a CaCO3 solid fraction and Na2CO3 solid fraction and to remove sodium salts; and admixing the CaCO3 solid fraction with water and a dispersant to disperse the CaCO3 solid fraction in water and form a dispersed slurry having a Brookfield viscosity of less than about 1000 cps at 100 rpm, thereby producing a dispersed slurry containing the purified precipitated calcium carbonate.
More Like This:
Inventors:
COX SHERMAN (US)
DAIGLE MARK (US)
SAMMARCO TIMOTHY (US)
DAIGLE MARK (US)
SAMMARCO TIMOTHY (US)
Application Number:
PCT/US2020/056012
Publication Date:
June 10, 2021
Filing Date:
October 16, 2020
Export Citation:
Assignee:
SPECIALTY MINERALS MICHIGAN INC (US)
International Classes:
C01F11/18
Foreign References:
| US20080053337A1 | 2008-03-06 | |||
| JP2008115052A | 2008-05-22 | |||
| CN109650433A | 2019-04-19 |
Other References:
KONONCHUK OLGA O. ET AL: "Rückgewinnung von CaCO 3 aus dem Nephelinschlamm der Aluminiumoxidproduktion", CHEMIE INGENIEUR TECHNIK., vol. 91, no. 4, 17 January 2019 (2019-01-17), WEINHEIM; DE, pages 494 - 501, XP055779622, ISSN: 0009-286X, Retrieved from the Internet [retrieved on 20210301], DOI: 10.1002/cite.201800159
Attorney, Agent or Firm:
BURNETTE, Jennifer (US)
Download PDF:
Previous Patent: SIDELINK GROUPCAST REACHABILITY BASED SCHEDULING
Next Patent: BAKED GOOD COMPOSITIONS CONTAINING ALLULOSE
Next Patent: BAKED GOOD COMPOSITIONS CONTAINING ALLULOSE