WO1997039991A1 - Procede de production d'hydroxyde de calcium - Google Patents

Procede de production d'hydroxyde de calcium Download PDF

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Publication number
WO1997039991A1
WO1997039991A1 PCT/JP1997/001419 JP9701419W WO9739991A1 WO 1997039991 A1 WO1997039991 A1 WO 1997039991A1 JP 9701419 W JP9701419 W JP 9701419W WO 9739991 A1 WO9739991 A1 WO 9739991A1
Authority
WO
WIPO (PCT)
Prior art keywords
calcium oxide
organic compound
calcium hydroxide
slaking
parts
Prior art date
Application number
PCT/JP1997/001419
Other languages
English (en)
Inventor
Tetsushi Iwashita
Shingo Ito
Yoshimi Goto
Takashi Inoi
Original Assignee
Yabashi Industries Co., Ltd.
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 Yabashi Industries Co., Ltd. filed Critical Yabashi Industries Co., Ltd.
Priority to JP09537932A priority Critical patent/JP2000510432A/ja
Publication of WO1997039991A1 publication Critical patent/WO1997039991A1/fr

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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
    • C04B2/00—Lime, magnesia or dolomite
    • C04B2/02—Lime
    • C04B2/04—Slaking
    • C04B2/06—Slaking with addition of substances, e.g. hydrophobic agents ; Slaking in the presence of other compounds

Definitions

  • the present invention relates to a process for producing calcium hydroxide having a large specific surface area.
  • Known processes for producing calcium hydroxide include the so called dry slaking method comprising the steps of supplying material calcium oxide into a slaking apparatus; adding water in an amount of 1.3 to 2 times the stoichiometric amount needed for hydrating calcium oxide into calcium hydroxide; vigorously agitating the calcium oxide and water so as to carry out slaking; aging the reaction compound in an aging apparatus under stirring, thereby eliminating irregularity in slaking and evaporating excess water; and if necessary, pulverizing and classifying the obtained calcium hydroxide.
  • the calcium hydroxide produced by this method generally has a moisture content of not more than 0.5%, is in the form of powder consisting of particles having irregular shapes and having sizes of not more than 150 ⁇ m, and has a small specific surface area.
  • an object of the present invention is to provide a process for producing powdery calcium hydroxide having a large specific surface area, which process can be performed using the conventional dry slaking equipment at a low cost.
  • the present inventors intensively studied to find that powdery calcium hydroxide having a large specific area can be obtained by firstly mixing powdery calcium oxide and an organic compound having at least one hydroxyl group, and then carrying out slaking. That is, the present invention provides a process for producing calcium hydroxide comprising, in the order mentioned, the steps of mixing powdery calcium oxide and an organic compound having at least one hydroxyl group; and slaking the resulting calcium oxide admixed with said organic compound so as to obtain powdery calcium hydroxide.
  • polyols are preferred.
  • the polyol preferably has a molecular weight of not more than 600, more preferably not more than 400.
  • Preferred examples of the polyol include ethanolamines such as monoethanolamine, diethanolamine and triethanolamine; glycols such as ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol and butylene glycol; and glycerins such as glycerin, diglycerin and polyglycerin.
  • propylene glycol and triethanolamine are preferred and propylene glycol is best preferred.
  • the organic compound having at least one hydroxyl group may be used individually or in combination.
  • the amount of the organic compound admixed with the powdery calcium oxide may preferably be 0.5 to 10 parts by weight, more preferably 1 to 3 parts by weight per 100 parts by weight of the powdery calcium oxide. If the amount of the organic compound is less than 0.5 parts by weight, the effect for increasing the specific surface area is small, and if it is more than 10 parts by weight, the effect for increasing the specific surface area reaches plateau and so disadvantageous from the view point of cost.
  • the organic compound having at least one hydroxyl group may be mixed with the powdery calcium oxide by, for example, kneading these materials with a kneader, or by spraying the organic compound to the powdery calcium oxide with a spray in a mixer under mixing.
  • the organic compound is in the form of liquid
  • the organic compound may not necessarily be liquid as long as the powdery calcium oxide is coated or impregnated with the organic compound.
  • the powdery calcium oxide preferably has a particle diameter of not more than 1 mm.
  • the amount of water to be added to the mixture may preferably be 1.3 to 2 times the stoichiometric amount needed for hydrating calcium oxide into calcium hydroxide as in the conventional dry slaking.
  • water is used in an amount of preferably 42 to 64 parts by weight per 100 parts by weight of the calcium oxide used as the starting material.
  • Slaking may be carried out at a temperature of 100°C to 250°C for 1 minute to 30 minutes. It is not necessary to delay the slaking reaction by cooling the reaction mixture or by using a retarder.
  • the obtained calcium hydroxide is aged.
  • the aging process may preferably be carried out at a temperature of 80°C to 250°C for 10 minutes to 1 hour under stirring.
  • the aging may also be carried out by merely stirring the reaction product at room temperature.
  • the obtained calcium hydroxide preferably has a moisture content of not more than 1% by weight, more preferably not more than 0.5% by weight.
  • the obtained calcium hydroxide powder preferably has a particle diameter of not more than 1 mm, more preferably 0.5 to 150 ⁇ m.
  • the reaction time needed for completing the slaking tends to be long, so that the specific surface area tends to be small.
  • the reaction may be promoted by using warm water preferably at 40°C to 80°C thereby calcium hydroxide having a specific surface area as high as those obtained by using calcium oxide having a high activity may be obtained.
  • Quick lime JIS Industrial Lime, quick lime of special grade
  • the reactivity (tu) of the obtained calcium oxide powder determined according to DIN1060 was 2.7 minutes.
  • To 100 parts by weight of the calcium oxide powder 1.5 parts by weight of triethanolamine was added and the resultant was stirred.
  • 42 parts by weight of water i.e., 1.3 times the stoichiometric amount at about 20°C was added. Slaking was performed at room temperature for 5 minutes under stirring. Thereafter, the reaction product was aged by stirring the reaction product at room temperature for 20 minutes to obtain powdery calcium hydroxide.
  • the apparent specific gravity, specific surface area and moisture content of the obtained calcium hydroxide powder were measured and the results are shown in Table 1 below.
  • the apparent specific gravity was measured by using a commercially available powder tester (HOSOKAWA).
  • the specific surface area was measured by the nitrogen gas adsorption method by using a commercially available BET specific surface area meter (Quick Surface
  • Comparative Example 1 The same procedure as in Example 1 was repeated except that the triethanolamine was not added to the calcium oxide powder but added to the water used for slaking. The results are shown in Table 1.
  • Example 3 The same procedure as in Example 1 was repeated except that the quick lime had a reactivity (tu) determined according to DIN1060 was 10.8 minutes. The results are shown in Table 1.
  • Example 3 The same procedure as in Example 1 was repeated except that the quick lime had a reactivity (tu) determined according to DIN1060 was 10.8 minutes. The results are shown in Table 1.
  • Example 4 The same procedure as in Example 2 was repeated except that warm water at about 60°C was used for the slaking. The results are shown in Table 1.
  • Example 4 The same procedure as in Example 2 was repeated except that warm water at about 60°C was used for the slaking. The results are shown in Table 1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

L'invention concerne un procédé de production d'hydroxyde de calcium ayant une grande surface active spécifique. Dans ce procédé, on mélange de l'oxyde de calcium à un composé organique contenant au moins un groupe hydroxyle. Ensuite, on éteint l'oxyde de calcium obtenu mélangé au composé organique, ce qui permet d'obtenir de l'hydroxyde de calcium en poudre.
PCT/JP1997/001419 1996-04-24 1997-04-24 Procede de production d'hydroxyde de calcium WO1997039991A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP09537932A JP2000510432A (ja) 1996-04-24 1997-04-24 水酸化カルシウムの製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8/126314 1996-04-24
JP12631496 1996-04-24

Publications (1)

Publication Number Publication Date
WO1997039991A1 true WO1997039991A1 (fr) 1997-10-30

Family

ID=14932125

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1997/001419 WO1997039991A1 (fr) 1996-04-24 1997-04-24 Procede de production d'hydroxyde de calcium

Country Status (7)

Country Link
JP (1) JP2000510432A (fr)
KR (1) KR19990022297A (fr)
CN (1) CN1092615C (fr)
ID (1) ID16819A (fr)
MY (1) MY132449A (fr)
TW (1) TW372938B (fr)
WO (1) WO1997039991A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010049479A1 (fr) * 2008-10-30 2010-05-06 S.A. Lhoist Recherche Et Developpement Compositions de chaux eteinte et leur procede de fabrication
CN102059044A (zh) * 2010-11-25 2011-05-18 武汉钢铁(集团)公司 常压干式消化制备钙基脱硫剂工艺
US10822442B2 (en) 2017-07-17 2020-11-03 Ecolab Usa Inc. Rheology-modifying agents for slurries
US10874982B2 (en) 2017-03-17 2020-12-29 Graymont (Pa) Inc. Calcium hydroxide-containing compositions and associated systems and methods

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100380983B1 (ko) * 2000-11-16 2003-05-01 주식회사 백광소재 비표면적이 큰 고반응성 수산화칼슘의 제조방법
KR20020004916A (ko) * 2001-11-26 2002-01-16 김상봉 비표면적이 큰 고반응성 소석회 분말의 제조 방법
CN103508478B (zh) * 2013-06-05 2016-08-24 池州灵芝化建材料科技有限公司 一种轻质碳酸钙和活性氧化钙残次品制备氢氧化钙的方法
CN104069793A (zh) * 2014-06-21 2014-10-01 总装备部工程设计研究总院 一种高吸附活性氢氧化钙纳米颗粒的制备方法
RU2663227C1 (ru) * 2014-10-18 2018-08-02 Ференц Тёрёчик Способ получения добавок, увеличивающих водонепроницаемость строительных материалов
CN104291371B (zh) * 2014-10-30 2017-02-15 杨富巍 一种纳米氢氧化钙的制备方法
CN105502457B (zh) * 2015-12-15 2017-06-06 常熟市宏宇钙化物有限公司 一种高表面活性氢氧化钙微粒的制备方法
CN106219585B (zh) * 2016-07-08 2017-07-25 武汉科技大学 一种致密颗粒氧化钙材料及其制备方法
CN110078389A (zh) * 2019-06-17 2019-08-02 邓金营 一种高反应性和高比表面积氢氧化钙粉体的制备方法
CN110818287A (zh) * 2019-12-30 2020-02-21 衢州顺天钙业有限公司 一种高分散性高比表面积氢氧化钙的制备方法
CN111116061A (zh) * 2019-12-31 2020-05-08 米易东立矿业有限公司 纳米氢氧化钙的干法制备方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120444A (en) * 1961-05-31 1964-02-04 Kaiser Aluminium Chem Corp Hydrated lime and method of making the same
DE2031109A1 (en) * 1970-06-24 1971-12-30 Ludwig Hörling Fabrik chemischer Baustoffe GmbH, 3283 Lügde Quicklime treated with flocculant - based on polyacrylic material gives stronger sand-lime bricks
DE3620024A1 (de) * 1986-06-13 1987-12-17 Fels Werke Peine Salzgitter Verfahren zur herstellung von feinkoernigem calciumhydroxid
EP0468719A1 (fr) * 1990-07-27 1992-01-29 Ecc International Limited Carbonate de calcium précipité
DE4138009A1 (de) * 1990-11-21 1992-05-27 Chemical Lime Co Verfahren zur herstellung von kalkhydrat mit kontrollierter temperatur
WO1992009528A1 (fr) * 1990-11-21 1992-06-11 Lhoist Recherche Et Developpement S.A. Hydroxyde de calcium et/ou de magnesium, sa preparation et son utilisation

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1024125C (zh) * 1991-06-04 1994-04-06 齐鲁乙烯无机化工厂 高活性、高纯度氢氧化钙的生产方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120444A (en) * 1961-05-31 1964-02-04 Kaiser Aluminium Chem Corp Hydrated lime and method of making the same
DE2031109A1 (en) * 1970-06-24 1971-12-30 Ludwig Hörling Fabrik chemischer Baustoffe GmbH, 3283 Lügde Quicklime treated with flocculant - based on polyacrylic material gives stronger sand-lime bricks
DE3620024A1 (de) * 1986-06-13 1987-12-17 Fels Werke Peine Salzgitter Verfahren zur herstellung von feinkoernigem calciumhydroxid
EP0468719A1 (fr) * 1990-07-27 1992-01-29 Ecc International Limited Carbonate de calcium précipité
DE4138009A1 (de) * 1990-11-21 1992-05-27 Chemical Lime Co Verfahren zur herstellung von kalkhydrat mit kontrollierter temperatur
WO1992009528A1 (fr) * 1990-11-21 1992-06-11 Lhoist Recherche Et Developpement S.A. Hydroxyde de calcium et/ou de magnesium, sa preparation et son utilisation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010049479A1 (fr) * 2008-10-30 2010-05-06 S.A. Lhoist Recherche Et Developpement Compositions de chaux eteinte et leur procede de fabrication
BE1018979A4 (fr) * 2008-10-30 2011-12-06 Lhoist Rech Et Dev Compositions de chaux eteinte et leur procede de fabrication.
CN102059044A (zh) * 2010-11-25 2011-05-18 武汉钢铁(集团)公司 常压干式消化制备钙基脱硫剂工艺
US10874982B2 (en) 2017-03-17 2020-12-29 Graymont (Pa) Inc. Calcium hydroxide-containing compositions and associated systems and methods
US11344844B2 (en) 2017-03-17 2022-05-31 Graymont (Pa) Inc. Calcium hydroxide-containing compositions and associated systems and methods
US10822442B2 (en) 2017-07-17 2020-11-03 Ecolab Usa Inc. Rheology-modifying agents for slurries

Also Published As

Publication number Publication date
MY132449A (en) 2007-10-31
JP2000510432A (ja) 2000-08-15
KR19990022297A (ko) 1999-03-25
CN1189814A (zh) 1998-08-05
ID16819A (id) 1997-11-13
CN1092615C (zh) 2002-10-16
TW372938B (en) 1999-11-01

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