PT94411A - Process for preparation of synthetic &beta-wollastonite - Google Patents

Process for preparation of synthetic &beta-wollastonite

Info

Publication number
PT94411A
PT94411A PT9441190A PT9441190A PT94411A PT 94411 A PT94411 A PT 94411A PT 9441190 A PT9441190 A PT 9441190A PT 9441190 A PT9441190 A PT 9441190A PT 94411 A PT94411 A PT 94411A
Authority
PT
Portugal
Prior art keywords
wollastonite
synthetic
preparation
degree
beta
Prior art date
Application number
PT9441190A
Other languages
Portuguese (pt)
Other versions
PT94411B (en
Inventor
Augusto Vaz Serra E Sousa
Luis Filipe Lopes Vilao Morais
Maria Regina Almeida Co Santos
Original Assignee
Tecnologico Da Ceramica E Do V
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 Tecnologico Da Ceramica E Do V filed Critical Tecnologico Da Ceramica E Do V
Priority to PT9441190A priority Critical patent/PT94411B/en
Publication of PT94411A publication Critical patent/PT94411A/en
Publication of PT94411B publication Critical patent/PT94411B/en

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  • Compositions Of Oxide Ceramics (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)

Abstract

With this process for preparation of synthetic β- wollastonite a degree of purity between 92% and 97% is obtained for the synthesized product, from quartz, calcite and diatomite, with addition of lithium carbonate or sodium carbonate acting as mineralizers. The work cycle involves two stages: the 1st, in which the maximum temperature level, between 1050 degree C and 1150 degree C, is attained after 30 minutes of rapid heating, and the 2nd, in which said level is maintained for two to three hours.
PT9441190A 1990-06-19 1990-06-19 BETA-WOLASTONITE SYNTHETIC PT94411B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PT9441190A PT94411B (en) 1990-06-19 1990-06-19 BETA-WOLASTONITE SYNTHETIC

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PT9441190A PT94411B (en) 1990-06-19 1990-06-19 BETA-WOLASTONITE SYNTHETIC

Publications (2)

Publication Number Publication Date
PT94411A true PT94411A (en) 1991-04-18
PT94411B PT94411B (en) 1997-05-28

Family

ID=20084752

Family Applications (1)

Application Number Title Priority Date Filing Date
PT9441190A PT94411B (en) 1990-06-19 1990-06-19 BETA-WOLASTONITE SYNTHETIC

Country Status (1)

Country Link
PT (1) PT94411B (en)

Also Published As

Publication number Publication date
PT94411B (en) 1997-05-28

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Legal Events

Date Code Title Description
FG3A Patent granted, date of granting

Effective date: 19970203

MM3A Annulment or lapse

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 19980831