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Approach In Controlling Dsp Scale In The Bayer Process
Abstract: The invention provides a method of controlling silica in the liquor circuit of the Bayer process. The method involves addition of a promoter material to enhance the precipitation of DSP and includes adding one or more silica dispersion materials or dry silica forms to those parts of the circuit where precipitation of DSP and removal of silica from solution is desirable; for example the desilication stage of a Bayer process plant. The removal of DSP from solution reduces silica concentration in the liquor and thereby enables better control of process issues such as silica contamination in alumina product and DSP formation in later stages of the process where precipitation as scale onto vessel walls and equipment is problematical. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process.
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Notices, Deadlines & Correspondence
Notices, Deadlines & Correspondence
Patent Information
Application #
Filing Date
31 October 2011
Publication Number
07/2013
Publication Type
INA
Invention Field
CHEMICAL
Status
Email
Parent Application
Patent Number
Legal Status
Grant Date
2018-02-08
Renewal Date
Applicants
NALCO COMPANY
1601 W. DIEHL ROAD, NAPERVILLE, ILLINOIS 60563-1198, UNITED STATES OF AMERICA
Inventors
1. LA, TIMOTHY
56 WILLIAMSON ROAD, KARDINVA, WESTERN AUSTRALIA 6163, AUSTRALIA
2. CUI, JI
116 FORESTVIEW LANE, AURORA, ILLINOIS 60502, UNITED STATES OF AMERICA
3. KILDEA, JOHN D.
8 LOXLEY PLACE, BALDIVIS, WESTERN AUSTRALIA 6171, AUSTRALIA
4. SLINKMAN, DAVID H.
1158 MICHELLE LANE, LOMBARD, ILLINOIS 60148, UNITED STATES OF AMERICA
5. COLEMAN, KIM RICHARD
728 MESA DRIVE, NAPERVILLE, ILLINOIS 60565, UNITED STATES OF AMERICA
Specification
NA
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 8416-delnp-2011-Correspondence Others-(26-03-2012).pdf | 2012-03-26 |
| 1 | 8416-DELNP-2011-RELEVANT DOCUMENTS [03-10-2023(online)].pdf | 2023-10-03 |
| 2 | 8416-delnp-2011-GPA.pdf | 2012-04-09 |
| 2 | 8416-DELNP-2011-RELEVANT DOCUMENTS [26-09-2022(online)].pdf | 2022-09-26 |
| 3 | 8416-DELNP-2011-RELEVANT DOCUMENTS [21-07-2021(online)].pdf | 2021-07-21 |
| 3 | 8416-delnp-2011-Form-5.pdf | 2012-04-09 |
| 4 | 8416-DELNP-2011-RELEVANT DOCUMENTS [27-03-2020(online)].pdf | 2020-03-27 |
| 4 | 8416-delnp-2011-Form-3.pdf | 2012-04-09 |
| 5 | 8416-DELNP-2011-RELEVANT DOCUMENTS [25-03-2020(online)].pdf | 2020-03-25 |
| 5 | 8416-delnp-2011-Form-2.pdf | 2012-04-09 |
| 6 | 8416-DELNP-2011-RELEVANT DOCUMENTS [26-03-2019(online)].pdf | 2019-03-26 |
| 6 | 8416-delnp-2011-Form-1.pdf | 2012-04-09 |
| 7 | 8416-DELNP-2011-RELEVANT DOCUMENTS [22-03-2019(online)].pdf | 2019-03-22 |
| 7 | 8416-delnp-2011-Drawings.pdf | 2012-04-09 |
| 8 | 8416-DELNP-2011-RELEVANT DOCUMENTS [27-03-2018(online)].pdf | 2018-03-27 |
| 8 | 8416-delnp-2011-Description (Complete).pdf | 2012-04-09 |
| 9 | 8416-delnp-2011-Correspondence Others.pdf | 2012-04-09 |
| 9 | 8416-DELNP-2011-RELEVANT DOCUMENTS [15-03-2018(online)].pdf | 2018-03-15 |
| 10 | 8416-delnp-2011-Claims.pdf | 2012-04-09 |
| 10 | 8416-DELNP-2011-IntimationOfGrant08-02-2018.pdf | 2018-02-08 |
| 11 | 8416-delnp-2011-Assignment.pdf | 2012-04-09 |
| 11 | 8416-DELNP-2011-PatentCertificate08-02-2018.pdf | 2018-02-08 |
| 12 | 8416-delnp-2011-Abstract.pdf | 2012-04-09 |
| 12 | 8416-DELNP-2011-CLAIMS [09-11-2017(online)].pdf | 2017-11-09 |
| 13 | 8416-DELNP-2011-COMPLETE SPECIFICATION [09-11-2017(online)].pdf | 2017-11-09 |
| 13 | 8416-DELNP-2011-FER.pdf | 2017-07-18 |
| 14 | 8416-DELNP-2011-CORRESPONDENCE [09-11-2017(online)].pdf | 2017-11-09 |
| 14 | 8416-DELNP-2011-FORM 3 [22-09-2017(online)].pdf | 2017-09-22 |
| 15 | 8416-DELNP-2011-FER_SER_REPLY [09-11-2017(online)].pdf | 2017-11-09 |
| 16 | 8416-DELNP-2011-CORRESPONDENCE [09-11-2017(online)].pdf | 2017-11-09 |
| 16 | 8416-DELNP-2011-FORM 3 [22-09-2017(online)].pdf | 2017-09-22 |
| 17 | 8416-DELNP-2011-COMPLETE SPECIFICATION [09-11-2017(online)].pdf | 2017-11-09 |
| 17 | 8416-DELNP-2011-FER.pdf | 2017-07-18 |
| 18 | 8416-delnp-2011-Abstract.pdf | 2012-04-09 |
| 18 | 8416-DELNP-2011-CLAIMS [09-11-2017(online)].pdf | 2017-11-09 |
| 19 | 8416-DELNP-2011-PatentCertificate08-02-2018.pdf | 2018-02-08 |
| 20 | 8416-DELNP-2011-IntimationOfGrant08-02-2018.pdf | 2018-02-08 |
| 21 | 8416-DELNP-2011-RELEVANT DOCUMENTS [15-03-2018(online)].pdf | 2018-03-15 |
| 22 | 8416-DELNP-2011-RELEVANT DOCUMENTS [27-03-2018(online)].pdf | 2018-03-27 |
| 23 | 8416-DELNP-2011-RELEVANT DOCUMENTS [22-03-2019(online)].pdf | 2019-03-22 |
| 24 | 8416-DELNP-2011-RELEVANT DOCUMENTS [26-03-2019(online)].pdf | 2019-03-26 |
| 25 | 8416-DELNP-2011-RELEVANT DOCUMENTS [25-03-2020(online)].pdf | 2020-03-25 |
| 26 | 8416-DELNP-2011-RELEVANT DOCUMENTS [27-03-2020(online)].pdf | 2020-03-27 |
| 27 | 8416-DELNP-2011-RELEVANT DOCUMENTS [21-07-2021(online)].pdf | 2021-07-21 |
| 28 | 8416-DELNP-2011-RELEVANT DOCUMENTS [26-09-2022(online)].pdf | 2022-09-26 |
| 29 | 8416-DELNP-2011-RELEVANT DOCUMENTS [03-10-2023(online)].pdf | 2023-10-03 |
Search Strategy
| 1 | 8416delnp2011_17-07-2017.pdf |