JPS553359A - Ettringite synthesizing method - Google Patents
Ettringite synthesizing methodInfo
- Publication number
- JPS553359A JPS553359A JP7614378A JP7614378A JPS553359A JP S553359 A JPS553359 A JP S553359A JP 7614378 A JP7614378 A JP 7614378A JP 7614378 A JP7614378 A JP 7614378A JP S553359 A JPS553359 A JP S553359A
- Authority
- JP
- Japan
- Prior art keywords
- tobermolite
- suspension
- lime
- filtrate
- mols
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title abstract 3
- 229910001653 ettringite Inorganic materials 0.000 title abstract 2
- 230000002194 synthesizing effect Effects 0.000 title 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 4
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 4
- 239000004571 lime Substances 0.000 abstract 4
- 239000000725 suspension Substances 0.000 abstract 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- 239000000706 filtrate Substances 0.000 abstract 3
- 239000005995 Aluminium silicate Substances 0.000 abstract 2
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 abstract 2
- 239000003513 alkali Substances 0.000 abstract 2
- 235000012211 aluminium silicate Nutrition 0.000 abstract 2
- 239000004566 building material Substances 0.000 abstract 2
- 229910052602 gypsum Inorganic materials 0.000 abstract 2
- 239000010440 gypsum Substances 0.000 abstract 2
- 238000001027 hydrothermal synthesis Methods 0.000 abstract 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 abstract 2
- 239000002994 raw material Substances 0.000 abstract 2
- 229910014813 CaC2 Inorganic materials 0.000 abstract 1
- 230000002378 acidificating effect Effects 0.000 abstract 1
- 239000004927 clay Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 239000010802 sludge Substances 0.000 abstract 1
- 229910001388 sodium aluminate Inorganic materials 0.000 abstract 1
Landscapes
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
PURPOSE: To obtain ettringite for building materials having heat insulating and self-flame-retarding effects by turning aluminum silicate such as kaolin and lime raw material into a suspension in the presence of alkali; subjecting the suspension to hydrothermal reaction to form tobermolite; separating the tobermolite; and reacting the filtrate with a specified amt. of lime and gypsum.
CONSTITUTION: Aluminum silicate such as kaolin or acidic clay and lime raw material such as CaO, esp. CaC2 sludge are turned into a suspension in the presence of alkali such as 10W20 g/l NaOH. The suspension is then subjected to hydrothermal reaction with steam of 4W40 kg/cm2 to form tobermolite (5CaO.6SiO2.5H2O), which is filtered. To the filtrate are added about 1.5 mols of lime and about 1.5 mols of gypsum to 1 mol of NaAlO2 in the filtrate, and they are reacted at ordinary temp. W90°C for above 5 hr. By this method tobermolite useful for building materials can be synthesized and extracted in the middle of the processes.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7614378A JPS553359A (en) | 1978-06-22 | 1978-06-22 | Ettringite synthesizing method |
| US06/051,057 US4243429A (en) | 1978-06-22 | 1979-06-22 | Process for producing tobermorite and ettringite |
| EP79102075A EP0006593B1 (en) | 1978-06-22 | 1979-06-22 | Process for producing tobermorite and ettringite |
| DE7979102075T DE2965242D1 (en) | 1978-06-22 | 1979-06-22 | Process for producing tobermorite and ettringite |
| US06/242,230 US4432804A (en) | 1978-06-22 | 1981-03-10 | Process for producing a mixture of tobermorite and ettringite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7614378A JPS553359A (en) | 1978-06-22 | 1978-06-22 | Ettringite synthesizing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS553359A true JPS553359A (en) | 1980-01-11 |
| JPS5652855B2 JPS5652855B2 (en) | 1981-12-15 |
Family
ID=13596766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7614378A Granted JPS553359A (en) | 1978-06-22 | 1978-06-22 | Ettringite synthesizing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS553359A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4872948A (en) * | 1982-03-05 | 1989-10-10 | Hitachi, Ltd. | Method and apparatus for controlling centrifugal thin film dryer |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57192666U (en) * | 1981-05-30 | 1982-12-07 |
-
1978
- 1978-06-22 JP JP7614378A patent/JPS553359A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4872948A (en) * | 1982-03-05 | 1989-10-10 | Hitachi, Ltd. | Method and apparatus for controlling centrifugal thin film dryer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5652855B2 (en) | 1981-12-15 |
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