JPS553359A - Ettringite synthesizing method - Google Patents

Ettringite synthesizing method

Info

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
Application number
JP7614378A
Other languages
Japanese (ja)
Other versions
JPS5652855B2 (en
Inventor
Hideo Tamura
Yoshiro Ibuki
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.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Priority to JP7614378A priority Critical patent/JPS553359A/en
Priority to US06/051,057 priority patent/US4243429A/en
Priority to DE7979102075T priority patent/DE2965242D1/en
Priority to EP79102075A priority patent/EP0006593B1/en
Publication of JPS553359A publication Critical patent/JPS553359A/en
Priority to US06/242,230 priority patent/US4432804A/en
Publication of JPS5652855B2 publication Critical patent/JPS5652855B2/ja
Granted legal-status Critical Current

Links

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
JP7614378A 1978-06-22 1978-06-22 Ettringite synthesizing method Granted JPS553359A (en)

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
DE7979102075T DE2965242D1 (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
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57192666U (en) * 1981-05-30 1982-12-07

Cited By (1)

* Cited by examiner, † Cited by third party
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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