Method for the production of alpha-calcium sulfate hemihydrate from calcium sulfate dihydrate
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 31, 2011
Grant Date -
Jul 1, 2010
app pub date -
May 20, 2008
filing date -
May 24, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Disclosed is a method for producing alpha-calcium sulfate hemihydrate from calcium dihydrate. Said method has the following features: a) calcium dihydrate is fed to an agitated autoclave (1); b) the agitated autoclave (1) is indirectly heated; c) water is added and incorporated in a controlled manner; d) the feedstock is prevented from adhering to surfaces of the reaction chamber by means of moved chains (3) that are mounted on the paddles and/or the drive shaft (16) of the agitated autoclave (1); e) the pressure in the reaction chamber is regulated at intervals or in a continuous manner by discharging vapor when a certain pressure has been reached in the interior, the vapor being conducted via a centrifugal separator (17) and a control valve (18); f) cold air is delivered for residual drying purposes; g) the process material is removed. Also disclosed is a corresponding apparatus for carrying out said method.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully