CA2579990A1 - Higher than 30% concentration lime slurries, preparation and uses thereof - Google Patents

Higher than 30% concentration lime slurries, preparation and uses thereof Download PDF

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Publication number
CA2579990A1
CA2579990A1 CA002579990A CA2579990A CA2579990A1 CA 2579990 A1 CA2579990 A1 CA 2579990A1 CA 002579990 A CA002579990 A CA 002579990A CA 2579990 A CA2579990 A CA 2579990A CA 2579990 A1 CA2579990 A1 CA 2579990A1
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CA
Canada
Prior art keywords
lignosulfonate
solution
process according
potassium
magnesium
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.)
Abandoned
Application number
CA002579990A
Other languages
French (fr)
Inventor
Robert Benson
Gerry Kutney
Marc Moreau
Juraj Strmen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tembec Inc
Original Assignee
Tembec Industries Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tembec Industries Inc filed Critical Tembec Industries Inc
Priority to CA002579990A priority Critical patent/CA2579990A1/en
Priority to PCT/CA2008/000381 priority patent/WO2008104074A1/en
Publication of CA2579990A1 publication Critical patent/CA2579990A1/en
Abandoned legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/16—Sulfur-containing compounds
    • C04B24/18—Lignin sulfonic acid or derivatives thereof, e.g. sulfite lye
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07G—COMPOUNDS OF UNKNOWN CONSTITUTION
    • C07G1/00—Lignin; Lignin derivatives
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0007—Recovery of by-products, i.e. compounds other than those necessary for pulping, for multiple uses or not otherwise provided for
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0064—Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
    • D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
    • D21C3/14—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites ammonium bisulfite

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Paper (AREA)

Abstract

The present invention relates to a composition comprising water, more than 30 % w/w of calcium hydroxide, and >= 0.2 % w/w dispersant. A process for preparing such a composition is also disclosed. The composition which can be in the form of a 45-55% concentration lime slurry is particularly useful for converting concentrated ammonium lignosulfonate into calcium lignosulfonate, for converting ammonium lignosulfonate into low sulfate calcium, potassium, sodium, or magnesium lignosulfonate and mixtures thereof, for removing soluble sulfate from concentrated sodium, potassium, ammonium or magnesium lignosulfonate or for treating a weak liquor obtained from the pulp and paper industry.

Claims (81)

1. A calcium hydroxide slurry composition comprising:

- calcium hydroxide > 30 % w/w - a dispersant, said dispersant being a salt of >= 0.2 % w/w lignosulfonic acid;

- water qsp 100 % w/w
2. A calcium hydroxide slurry composition comprising:

- 40.0 to 55.0 % w/w of calcium hydroxide.

- 0.2 to 7.5 % w/w of a dispersant, said dispersant being a salt of a lignosulfonic acid; and - 37.5 to 59.8 % w/w of water.
3. A calcium hydroxide slurry composition comprising:
- 45.0 to 50.0 % w/w of calcium hydroxide.

- 0.2 to 7.5 % w/w of a dispersant, said dispersant being a salt of a lignosulfonic acid; and - 42.5 to 54.8 % w/w of water.
4. A composition according to any one of claims 1 to 3, wherein said composition has a concentration of solids of 45 to 55 % w/w.
5. A composition according to any one of claims 1 to 4, wherein said composition has a viscosity below 2000 cps.
6. A composition according to any one of claims 1 to 4, wherein said composition has a viscosity below 1000 cps.
7. A composition according to any one of claims 1 to 4, wherein said composition has a viscosity below 500 cps.
8. A composition according to any one of claims 1 to 4, wherein said composition has a viscosity between 10 and 500 cps
9. A composition according to any one of claims 1 to 8, wherein said dispersant is an alkali metal salt of a lignosulfonic acid.
10. A composition according to any one of claims 1 to 9, wherein the dispersant is selected from the group consisting of sodium lignosulfonate, potassium lignosulfonate, and mixtures thereof.
11. A composition according to any one of claims 1 to 8, wherein said dispersant is an alkaline earth metal salt of a lignosulfonic acid.
12. A composition according to any one of claims 1 to 8 and 10, wherein said dispersant is magnesium lignosulfonate.
13. Use of a composition as defined in any one of claims 1 to 12, for preparing a solution of less than 2.0 % w/w (dry basis) soluble sulfate lignosulfonate salt selected from the group consisting of calcium lignosulfonate and a mixture of calcium and alkali metal lignosulfonate and/or alkaline earth metal lignosulfonate (preferably sodium and/or potassium and/or magnesium lignosulfonate).
14. Use of a composition as defined in any one of claims 1 to 12, for converting an ammonium lignosulfonate solution into a calcium lignosulfonate solution having 45-55 % w/w solids concentration.
15. Use of a composition as defined in any one of claims 1 to 12, for converting an ammonium lignosulfonate solution into a mixture of calcium and sodium and/or potassium and/or magnesium lignosulfonate having 45-55 % w/w solids concentration.
16. Use of a composition as defined in any one of claims 1 to 12, for removing soluble sulfates from a solution comprising 45-55 % w/w solids lignosulfonate salts selected from the group consisting of ammonium lignosulfonate, sodium lignosulfonate, potassium lignosulfonate, magnesium lignosulfonate and mixtures thereof.
17. A process for preparing a composition as defined in any one of claims 1 to 12, said process comprising a step of admixing together the dispersant, water and calcium hydroxide.
18. A process according to claim 17, wherein the dispersant, water and calcium hydroxide are mixed together at a temperature of 25 to 100°C.
19. A process according to claim 17, wherein the dispersant, water and calcium hydroxide are mixed together at a temperature of 60 to 100°C.
20. A process according to any one of claims 17 to 19, wherein said calcium hydroxide slurry has a concentration of solids of about 40 to about 55 % w/w.
21. A process according to any one of claims 17 to 20, wherein said dispersant is an alkali metal salt of a lignosulfonic acid.
22. A process according to claim 21, wherein the alkali metal salt of lignosulfonic acid is selected from the group consisting of sodium lignosulfonate, potassium lignosulfonate, and mixtures thereof.
23. A process according to any one of claims 17 to 20, wherein said dispersant is an alkaline earth metal salt of a lignosulfonic acid.
24. A process according to claim 23, wherein said alkaline earth metal salt of lignosulfonic acid is magnesium lignosulfonate.
25. A process for preparing a solution of calcium lignosulfonate optionally in admixture with an alkali metal lignosulfonate and/or alkaline earth metal lignosulfonate (preferably sodium and/or potassium and/or magnesium lignosulfonate), said process comprising a step of reacting ammonium lignosulfonate solution with - 0.1-20% by weight of calcium hydroxide slurry composition as defined in any one of claims 1 to 12 optionally further containing between 0-20% by weight (upper limit included) of an alkali metal hydroxide and/or an alkaline earth metal hydroxide (preferably sodium hydroxide and/or potassium hydroxide and/or magnesium hydroxide); or - optionally 0.1 - 20% by weight of calcium hydroxide slurry composition and a solution comprising between 0-20% (upper limit included) by weight of an alkali metal hydroxide and/or an alkaline earth metal hydroxide (preferably sodium hydroxide and/or potassium hydroxide and/or magnesium hydroxide).
26. A process according to claim 25, wherein said ammonium lignosulfonate solution has a concentration of solids of about 45 to about 55 % w/w.
27. A process according to claim 25, wherein said solution of calcium lignosulfonate optionally in admixture with sodium and/or potassium and/or magnesium lignosulfonate has a concentration of solids of at least 35 % w/w.
28. A process according to claim 25, wherein said solution of calcium lignosulfonate optionally in admixture with sodium and/or potassium and/or magnesium lignosulfonate has a concentration of solids of at least 40 % w/w.
29. A process according to claim 25, wherein said solution of calcium lignosulfonate optionally in admixture with sodium and/or potassium and/or magnesium lignosulfonate has a concentration of solids of at least 50 % w/w.
30. A process according to claim 25, wherein said solution of calcium lignosulfonate optionally in admixture with sodium and/or potassium and/or magnesium lignosulfonate has a concentration of solids of about 40 to about 55 % w/w.
31. A process according to claim 25 wherein said solution of calcium lignosulfonate optionally in admixture with sodium and/or potassium and/or magnesium lignosulfonate solution has a concentration of solids of about 45 to about 55 % w/w.
32. A process according to any one of claims 25 to 31, wherein said solution of calcium lignosulfonate optionally in admixture with sodium and/or potassium and/or magnesium lignosulfonate has a concentration of soluble sulfate that is less than 2.0% w/w dry basis.
33. A process for preparing a solution of calcium lignosulfonate optionally in admixture with an alkali metal lignosulfonate and/or alkaline earth metal lignosulfonate (preferably sodium and/or potassium and/or magnesium lignosulfonate), said process comprising :

a) reacting a solution of ammonium lignosulfonate with a composition as defined in any one of claims 1 to 12, optionally containing an alkali metal hydroxide and/or an alkaline earth metal hydroxide (preferably sodium hydroxide and/or potassium hydroxide and/or magnesium hydroxide);

b) steam stripping the solution obtained in step (a), and removing ammonia therefrom; so as to obtain said solution of calcium lignosulfonate optionally containing alkali metal lignosulfonate and/or alkaline earth metal lignosulfonate (preferably sodium and/or potassium and/or magnesium lignosulfonate);

c) adding an acid to said solution obtained from step (b) so as to adjust the pH;

d) removing calcium sulphate from said solution obtained from step (c);

e) cooling the said solution obtained from step (d).
34. A process according to claim 33, wherein the alkali metal hydroxide is under the form of an aqueous solution having a sodium hydroxide and/ or potassium hydroxide content of 50% w/w.
35. A process according to claim 33, wherein the alkali metal hydroxide is reached with the ammonium lignosulfonate at a dosage between 0 and 20% w/w dry basis (upper limit included).
36. A process according to claim 33, wherein the alkaline earth metal hydroxide is under the form of an aqueous slurry solution having a magnesium hydroxide content of 40-50% w/w.
37. A process according to claim 33, wherein the alkaline metal hydroxide is reacted with the ammonium lignosulfonate at a dosage between 0 and 20% w/w dry basis (upper limit included).
38. A process according to claim 33, wherein the calcium hydroxide slurry composition is reacted with the ammonium lignosulfonate at a dosage of 0.1-20% w/w dry basis.
39. A process according to claim 33, wherein steam is injected in step (a) so that the solution of ammonium lignosulfonate is reacted solution with a composition as defined in any one of claims 1 to 12, optionally containing an alkali metal hydroxide and/or an alkaline earth metal hydroxide, at a temperature of 90 to 130 ° C.
40. A process according to claim 39, wherein the temperature is about 112 °C.
41. A process for preparing a solution of calcium lignosulfonate optionally containing alkali metal lignosulfonate and/or alkaline earth metal hydroxide lignosulfonate (preferably sodium and/or potassium and/or magnesium lignosulfonate), said process comprising:

a) carrying out a process as defined in any one of claims 17 to 24, so as to obtain a calcium hydroxide slurry composition;

b) reacting ammonium lignosulfonate solution together with a calcium hydroxide slurry composition as obtained in step (a), and optionally with a solution of an alkali metal hydroxide and/or an alkaline earth metal hydroxide (preferably sodium hydroxide and/or potassium hydroxide and/or magnesium hydroxide);

c) steam stripping the solution obtained in step (b) to substantially remove ammonia therefrom, so as to obtain said calcium solution optionally further containing alkali metal lignosulfonate and/or alkaline earth metal hydroxide lignosulfonate (preferably sodium and/or potassium and/or magnesium lignosulfonate);

d) adding an acid to said solution obtained in step (c) so as to adjust the pH;

e) removing calcium sulphate from said solution obtained in step (d);

f) cooling the said solution obtained in step (e).
42. A process according to claim 41, wherein the alkali metal hydroxide is under the form of an aqueous solution having a sodium hydroxide and/or potassium hydroxide content of 50% w/w.
43. A process according to claim 41, wherein the alkali metal hydroxide is reached with the ammonium lignosulfonate at a dosage between 0 and 20% w/w dry basis (upper limit included).
44. A process according to claim 41, wherein the alkaline earth metal hydroxide is under the form of an aqueous slurry solution having a magnesium hydroxide content of 40-50% w/w.
45. A process according to claim 41, wherein the alkaline metal hydroxide is reached with the ammonium lignosulfonate at a dosage between 0 and 20% w/w dry basis (upper limit included).
46. A process according to claim 41, wherein the calcium hydroxide slurry composition is reached with the ammonium lignosulfonate at a dosage of 0.1-20% w/w dry basis.
47. A process according to claim 41, wherein steam is injected in step (b) so that the solution of ammonium lignosulfonate solution is reached with a composition as defined in any one of claims 1 to 12, optionally containing an alkali metal hydroxide and/or an alkaline earth metal hydroxide at a temperature of about 90 to about 130 °C.
48. A process according to claim 47, wherein the temperature is about 112 °C.
49. A process according to any one of claims 41 to 48, wherein the pH is adjusted at a value of about 4.0 to about 9Ø
50. A process according to claim 49, wherein the pH is adjusted at a value of about 5.0 to about 6Ø
51. A process according to any one of claims 41 to 50, wherein the acid is selected from the group consisting of higher than 25% w/w solids sulfuric acid, acetic acid, formic acid, aluminum sulfate and nitric acid
52. A process according to any one of claims 41 to 50, wherein gypsum is removed by centrifugation at 80°C.
53. A process according to any one of claims 41 to 53, wherein the said solution of calcium lignosulfonate optionally containing sodium and/or potassium and/or magnesium lignosulfonate is cooled to below 60°C.
54. A process according to any one of claims 41 to 53, wherein said ammonium lignosulfonate solution has a concentration of solids of about 45 to about 55 % w/w.
55. A process according to any one of claims 41 to 53, wherein said solution of calcium lignosulfonate optionally containing sodium and/or potassium and/or magnesium lignosulfonate has a concentration of solids of at least 40 % w/w.
56. A process according to any one of claims 41 to 53, wherein said solution of calcium lignosulfonate optionally containing sodium and/or potassium and/or magnesium lignosulfonate has a concentration of solids of at least 45 % w/w.
57. A process according to any one of claims 41 to 53, wherein said solution of calcium lignosulfonate optionally containing sodium and/or potassium and/or magnesium lignosulfonate has a concentration of solids of at least 50 % w/w.
58. A process according to any one of claims 41 to 53, wherein said solution of calcium lignosulfonate optionally containing sodium and/or potassium and/or magnesium lignosulfonate has a concentration of solids of about 40 to about 55 % w/w.
59. A process according to any one of claims 41 to 53, wherein said solution of calcium lignosulfonate optionally containing sodium and/or potassium and/or magnesium lignosulfonate has a concentration of solids of about 45 to about 55 % w/w.
60. A process according to any one of claims 41 to 59, wherein said solution of calcium lignosulfonate optionally containing sodium and/or potassium and/or magnesium lignosulfonate has a concentration of soluble sulfate that is less than 2.0% wt/wt dry basis.
61. A process for preparing a low sulfate alkali metal, alkaline earth metal ammonium or mixture thereof lignosulfonate solution (preferably low sulfate sodium, potassium, magnesium, ammonium or a mixture thereof lignosulfonate solution) comprising:

a) carrying out a process as defined in any one of claims 17 to 24, so as to obtain a calcium hydroxide slurry composition;

b) reacting a sulfate containing alkali metal, alkaline earth metal ammonium or mixture thereof lignosulfonate solution (preferably sodium, potassium, magnesium, ammonium or a mixture thereof lignosulfonate with calcium hydroxide slurry obtained in step (a) to obtain a solution of low sulfate alkali metal, alkaline earth metal ammonium or mixture thereof lignosulfonate solution (preferably low sulfate sodium, potassium, magnesium, ammonium or a mixture thereof lignosulfonate solution); and c) removing calcium sulphate from said solution obtained in step (b).
62. A process according to claim 61, wherein the calcium hydroxide is added to the said sodium, potassium, magnesium, ammonium or mixture thereof lignosulfonate at a dosage of 0.1-10% w/w dry basis.
63. A process according to claims 61, wherein the calcium sulfate defines gypsum that is removed by centrifugation at 80C.
64. A process according to claim 61, wherein said low sulfate sodium, potassium, magnesium, ammonium or a mixture thereof lignosulfonate solution has a concentration of solids of about 45 to about 55 % w/w.
65. A process according to claim 61, wherein said low sulfate sodium, potassium, magnesium, ammonium or a mixture thereof lignosulfonate solution has a concentration of solids of at least 40 %
w/w.
66. A process according to claim 61, wherein said low sulfate sodium, potassium, magnesium, ammonium or a mixture thereof lignosulfonate solution has a concentration of solids of at least 45 %
w/w.
67. A process according to claim 61, wherein said low sulfate sodium, potassium, magnesium, ammonium or a mixture thereof lignosulfonate solution has a concentration of solids of at least 50 %
w/w.
68. A process according to claim 61, wherein said low sulfate sodium, potassium, magnesium, ammonium or a mixture thereof lignosulfonate solution has a concentration of solids of about 40 to about 55 % w/w.
69. A process according to claim 61, wherein said low sulfate sodium, potassium, magnesium, ammonium or a mixture thereof lignosulfonate solution has a concentration of solids of about 45 to about 55 %.w/w
70. A process according to any one of claims 61 to 70 wherein said sodium, potassium, magnesium, ammonium or a mixture thereof lignosulfonate solution has a concentration of soluble sulfate that is less than 2.0% w/w dry basis.
71. Use of a process as defined in any one of claims 34 to 70, for treating a weak liquor originating from pulp and paper industry.
72. Use of a salt of a lignosulfonic acid as a dispersant in a calcium hydroxide slurry.
73. Use of an alkali metal salt of a lignosulfonic acid as a dispersant in a calcium hydroxide slurry.
74. Use according to claim 73, wherein the alkali metal salt of lignosulfonic acid is selected from the group consisting of sodium lignosulfonate, potassium lignosulfonate, and mixtures thereof.
75. Use of an said alkaline earth metal salt of a lignosulfonic acid as a dispersant in a calcium hydroxide slurry.
76. Use according to claim 74, wherein said alkaline earth metal salt of lignosulfonic acid is selected from the group consisting of magnesium lignosulfonate.
77. A composition whenever obtained by a process as defined in any one of claims 18 to 25.
78. A composition whenever obtained by a process as defined in any one of claims 34 to 70.
79. A solution of calcium lignosulfonate optionally containing sodium and/or potassium and/or magnesium lignosulfonate solution whenever obtained by the process defined in any one of claims 34 to 70.
80. A low sulfate alkali metal, alkaline earth metal ammonium or mixture thereof lignosulfonate solution (preferably low sulfate sodium, potassium, magnesium, ammonium or a mixture thereof lignosulfonate solution) obtained by the process defined in claim 61.
81 A fluidizing additive for cement or concrete comprising a lignosulfonate solution whenever obtained by a process as defined in claims 34 to 70.
CA002579990A 2007-02-28 2007-02-28 Higher than 30% concentration lime slurries, preparation and uses thereof Abandoned CA2579990A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002579990A CA2579990A1 (en) 2007-02-28 2007-02-28 Higher than 30% concentration lime slurries, preparation and uses thereof
PCT/CA2008/000381 WO2008104074A1 (en) 2007-02-28 2008-02-28 Higher than 30% concentration lime slurries, preparation and uses thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002579990A CA2579990A1 (en) 2007-02-28 2007-02-28 Higher than 30% concentration lime slurries, preparation and uses thereof

Publications (1)

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CA2579990A1 true CA2579990A1 (en) 2008-08-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116688744A (en) * 2023-08-02 2023-09-05 杭州尚善若水环保科技有限公司 Mixed medicament for improving fluidity of lime slurry

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116688744A (en) * 2023-08-02 2023-09-05 杭州尚善若水环保科技有限公司 Mixed medicament for improving fluidity of lime slurry
CN116688744B (en) * 2023-08-02 2023-10-31 杭州尚善若水环保科技有限公司 Mixed medicament for improving fluidity of lime slurry

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