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WO2005076858B1 - Liquid additive for intergrinding cement - Google Patents

Liquid additive for intergrinding cement

Info

Publication number
WO2005076858B1
WO2005076858B1 PCT/US2005/003072 US2005003072W WO2005076858B1 WO 2005076858 B1 WO2005076858 B1 WO 2005076858B1 US 2005003072 W US2005003072 W US 2005003072W WO 2005076858 B1 WO2005076858 B1 WO 2005076858B1
Authority
WO
WIPO (PCT)
Prior art keywords
additive
salt
cement
derivative
group
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2005/003072
Other languages
French (fr)
Other versions
WO2005076858A2 (en
WO2005076858A3 (en
Filing date
Publication date
Application filed filed Critical
Priority to EP05722640A priority Critical patent/EP1713739A4/en
Priority to KR1020067015551A priority patent/KR101168878B1/en
Priority to JP2006552196A priority patent/JP2007520416A/en
Priority to HK07106545.0A priority patent/HK1101570B/en
Priority to CA002553659A priority patent/CA2553659A1/en
Priority to BRPI0507332-4A priority patent/BRPI0507332A/en
Priority to AU2005213339A priority patent/AU2005213339B2/en
Publication of WO2005076858A2 publication Critical patent/WO2005076858A2/en
Publication of WO2005076858A3 publication Critical patent/WO2005076858A3/en
Publication of WO2005076858B1 publication Critical patent/WO2005076858B1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Abstract

Exemplary compositions and methods for reducing hexavalent chromium in cementitious compositions involve the use of a liquid additive composition, comprising stannous chloride. Along with the stannous chloride may be used at least one co-additive comprising an antioxidant, oxygen scavenger, or mixture thereof, and/or at least one agent comprising a cement grinding aid, cement quality improver, or mixture thereof.

Claims

AMENDED CLAIMS[received by the International Bureau on 21 December 2005 (21.12.2005); original claims 1, 5, ,22, 28 amended, claims 2-4, 29-30 canceled, remaining claims renumbered 1-25]
1. A method for reducing hexavalent chromium in cementitious compositions, comprising: grinding cement clinker to produce Portland cement; introducing to said cement clinker, before or during the grinding thereof, a liquid additive composition comprising stannous chloridej present in an amount not less than 20 percent and not greater 95 percent7 based on total weight of the liquid additive composition; said liquid additive composition further comprising a co-additive selected from the group consisting of an antioxidant and an oxygen scavenger, said co- additive being present within said liquid additive composition in a stannous chloriderco-additive ratio of not less than 99.5:0.5 and not greater than 20:80; said stannous chloride being added to said cement clinker at a rate no less than 0.001 and no greater than 5.0 percent based on weight of said cement clinker.
2. The method of claim 1 wherein said co-additive is an antioxidant.
3. The method of claim 1 wherein said co-additive is an oxygen scavenger.
4. The method of claim 3 wherein said oxygen scavenger comprises (a) a compound having an ethylenically unsaturated hydrocarbon (b) a phenolic or salt or derivative thereof; (c) a hydroxylamine or hydrazine or derivative thereof; (d) a sulfurous acid or salt or derivative thereof, and (f) a transition metal complex.
5. The method of claim 4 wherein said co-additive is a compound having an ethylenically unsaturated hydrocarbon which is substituted or unsubstituted.
6. The method of claim 5 further comprising a transition metal catalyst.
7. The method of claim 4 wherein said co-additive is a compound having at least one enediol group or salt or derivative thereof.
8. The method of claim 7 wherein said co-additive is an ascorbic acid or a salt, stereoisomer, or derivative thereof.
9. The method of claim 7 wherein said co-additive is an alkali metal ascorbate, isoascorbate, or erythorbate.
10. The method of claim 7 wherein said co-additive is sodium or potassium ascorbate.
11. The method of claim 4 wherein said co-additive comprises a phenolic or a salt or derivative thereof.
12. The method of claim 11 wherein said phenolic or salt thereof comprises a quinone or hydroxyl form thereof.
13. The method of claim 12 wherein said quinone is pyrocatechol, hydroquinone, or a derivative thereof.
14. The method of claim 4 wherein said co-additive is hydroxylamine, hydrazine, or a derivative thereof.
15. The method of claim 14 wherein said co-additive is hydroxylamine.
16. The method of claim 4 wherein said co-additive is a sulfurous acid or a salt thereof.
17. The method of claim 16 wherein said co-additive is a sulfite, bisulfite, or thiosulfite.
18. The method of claim 16 wherein said co-additive is an alkali metal salt comprising sodium, potassium, or a mixture thereof.
19. The method of claim 1 further comprising introducing at least two co-additives each comprising an antioxidant, oxygen scavenger, or mixture thereof, to said cement clinker.
20. The method of claim 4 wherein said co-additive is a transition metal complex.
21. The method of claim 1 further comprising at least one agent selected from the group consisting of cement grinding aids and cement quality improvers.
22. The method of claim 21 wherein said agent is selected from the group consisting of an amine, alkanolamine, acrylic acid or salt thereof, glycol, glycerol, acetate salt, a phenol, chloride salt, sugar, dispersants, lignins, air entraining surfactants, nitrite salts, and nitrate salts.
23. The method of claim 1 wherein, in said liquid additive composition, said stannous chloride is solubilized, dispersed, and/or suspended in water, a glycol or glycerol, or mixture thereof.
24. A method for reducing hexavalent chromium in cementitious compositions, comprising: grinding cement clinker to produce Portland cement; and introducing to said cement clinker, before or during the intergrinding thereof, a liquid additive composition comprising stannous chloride and a co- additive, agent, or mixture thereof; said coadditive being selected from the group consisting of an antioxidant and oxygen scavenger; and said agent being selected from the group consisting of a cement grinding aid and cement quality improver.
25. A cement made from the method of claim 1.
PCT/US2005/003072 2004-02-04 2005-01-31 Liquid additive for intergrinding cement Ceased WO2005076858A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP05722640A EP1713739A4 (en) 2004-02-04 2005-01-31 LIQUID ADDITIVE FOR PRODUCING CEMENT BY INTERBREYING
KR1020067015551A KR101168878B1 (en) 2004-02-04 2005-01-31 Liquid additive for intergrinding cement
JP2006552196A JP2007520416A (en) 2004-02-04 2005-01-31 Liquid additives for mutual ground cement
HK07106545.0A HK1101570B (en) 2004-02-04 2005-01-31 Method for reducing hexavlent chromium in cementitious composition
CA002553659A CA2553659A1 (en) 2004-02-04 2005-01-31 Liquid additive for intergrinding cement
BRPI0507332-4A BRPI0507332A (en) 2004-02-04 2005-01-31 liquid additive for intermediate cement crushing
AU2005213339A AU2005213339B2 (en) 2004-02-04 2005-01-31 Liquid additive for intergrinding cement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US54184204P 2004-02-04 2004-02-04
US60/541,842 2004-02-04

Publications (3)

Publication Number Publication Date
WO2005076858A2 WO2005076858A2 (en) 2005-08-25
WO2005076858A3 WO2005076858A3 (en) 2005-12-29
WO2005076858B1 true WO2005076858B1 (en) 2006-03-09

Family

ID=34860223

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/003072 Ceased WO2005076858A2 (en) 2004-02-04 2005-01-31 Liquid additive for intergrinding cement

Country Status (9)

Country Link
US (1) US7087110B2 (en)
EP (1) EP1713739A4 (en)
JP (1) JP2007520416A (en)
KR (1) KR101168878B1 (en)
CN (1) CN100441533C (en)
AU (1) AU2005213339B2 (en)
BR (1) BRPI0507332A (en)
CA (1) CA2553659A1 (en)
WO (1) WO2005076858A2 (en)

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