Patent US66845A successfully refreshed from Google Patents.
Patent US4366121A successfully refreshed from Google Patents.
US4366121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for forming a reaction product such as calcium silicate
Assignee: Redco NV SA
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Filing: 1980-06-27
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Granted: 1982-12-28
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Expires: 2000-06-27
Abstract
Abstract A system for forming a reaction product such as calcium silicate comprises an autoclave for receiving the reaction constituents and for reacting these constituents to form a reaction product, a holding vessel for receiving the reaction product and a flow passage connecting the autoclave to the holding vessel and for allowing the passage of the reaction product from the autoclave to the holding vessel. The flow passage includes a heat exchanger for transferring heat from the reaction product during its passage through the flow passage to another medium. The system includes an electronic control system for maintaining the pressure in the holding vessel a controlled amount beneath the pressure in the autoclave during the transfer of the reaction product from the autoclave to the holding vessel. This minimizes the structural damage to the reaction product during its transfer to the holding vessel. The holding vessel can, if desired, be used to mix additional material into the reaction product.
Inventors
- 👤 Pieter Krijgsman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:36
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/24; B; B01; B01J; B01J3/00; B01J3/02; C04; C04B; C04B28/00; C04B28/18; Y; Y02; Y02P; Y02P40/00; Y02P40/60
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
145 words
A system for forming a calcium silicate reaction product comprising: an autoclave for receiving calcium hydroxide, silicon dioxide and water and for reacting these constituents to form a calcium silicate slurry; a holding vessel for receiving the calcium silicate slurry from said autoclave; means for mixing fibrous material with said calcium silicate slurry in said holding vessel; a flow passage connecting said autoclave to said holding vessel for allowing the passage of said slurry from said autoclave to said holding vessel; means for transferring heat from said slurry during its passage through said flow passage; and means for maintaining the pressure in said holding vessel a controlled amount beneath the pressure in said autoclave such that during the transfer of the slurry from said autoclave to said holding vessel there will be minimal structural damage to the slurry during its transfer to said holding vessel.
Claim 2
Independent Claim
145 words
A system for forming a calcium silicate reaction product comprising: an autoclave for receiving calcium hydroxide, silicon dioxide and water and for reacting these constituents to form a calcium silicate slurry; a holding vessel for receiving the calcium silicate slurry from said autoclave; means for mixing fibrous material with said calcium silicate slurry in said holding vessel; a flow passage connecting said autoclave to said holding vessel for allowing the passage of said slurry from said autoclave to said holding vessel; means for transferring heat from said slurry during its passage through said flow passage; and means for maintaining the pressure in said holding vessel a controlled amount beneath the pressure in said autoclave such that during the transfer of the slurry from said autoclave to said holding vessel there will be minimal structural damage to the slurry during its transfer to said holding vessel.
Claim 3
Dependent Claim
65 words
A system as in claim 1 wherein said flow passage for allowing the passage of said slurry from said autoclave to said holding vessel and said means for transferring heat comprise a flow passage with a heat exchanger formed adjacent to at least a portion of said flow passage thereby to allow a portion of the heat in said slurry to transfer to another medium.
Claim 4
Independent Claim
123 words
A system as in claims 1 or 2 wherein said means for controlling the pressure in said holding vessel to a controlled amount beneath the pressure in said autoclave comprises: valve means mounted on said holding vessel; a first pressure transducer positioned and arranged to measure the pressure in said holding vessel and produce a first signal representative thereof; a second pressure transducer positioned and arranged to measure the pressure in said autoclave and produce a second signal representative thereof; and means responsive to said first signal and said second signal for controlling the position of said valve means on said holding vessel thereby to maintain the pressure in said holding vessel substantially at said controlled amount beneath the pressure in said autoclave.
Claim 5
Independent Claim
100 words
A system for forming a reaction product comprising: an autoclave for use in forming said reaction product, a holding vessel for receiving the reaction product formed in said autoclave; a flow passage connecting said autoclave to said holding vessel, means for maintaining the pressure in said holding vessel in a controlled manner beneath the pressure in said autoclave during the transfer of the reaction product in said autoclave through said flow passage to said holding vessel; and means for removing a portion of the heat from said reaction product during the passage of said reaction product through said flow passage.
Claim 6
Independent Claim
100 words
A system for forming a reaction product comprising: an autoclave for use in forming said reaction product, a holding vessel for receiving the reaction product formed in said autoclave; a flow passage connecting said autoclave to said holding vessel, means for maintaining the pressure in said holding vessel in a controlled manner beneath the pressure in said autoclave during the transfer of the reaction product in said autoclave through said flow passage to said holding vessel; and means for removing a portion of the heat from said reaction product during the passage of said reaction product through said flow passage.
Claim 7
Dependent Claim
76 words
The system as in claim 4 wherein said means for maintaining comprises: means for detecting the pressure in said holding vessel and producing a first output signal representative thereof; means for detecting the pressure in said autoclave and producing a second output signal representative thereof; and means responsive to said first output signal and said second output signal for holding the pressure in said holding vessel a substantially constant amount beneath the pressure in said autoclave.
Claim 8
Dependent Claim
49 words
The system as in claim 4 wherein said means for removing a portion of the heat from said reaction product further comprises: means directly adjacent at least a portion of said flow passage for transferring a portion of the heat from the reaction product to a heat storage medium.
Claim 9
Independent Claim
71 words
A system comprising: an autoclave for use in forming a reaction product; a holding vessel for receiving said reaction product; a pressure release valve on said holding vessel; a flow passage connecting said autoclave to said holding vessel; and means for controlling the pressure in said holding vessel to be no more than a first selected amount and no less than a second selected amount beneath the pressure in said autoclave.
Claim 10
Independent Claim
71 words
A system comprising: an autoclave for use in forming a reaction product; a holding vessel for receiving said reaction product; a pressure release valve on said holding vessel; a flow passage connecting said autoclave to said holding vessel; and means for controlling the pressure in said holding vessel to be no more than a first selected amount and no less than a second selected amount beneath the pressure in said autoclave.
Claim 11
Dependent Claim
115 words
A system as in claim 7 wherein said means for controlling comprises: means for detecting the pressure in said holding vessel and producing a first output signal representative thereof; means for detecting the pressure in said autoclave and producing a second output signal representative thereof; and means responsive to said first output signal and said second output signal for opening said valve to reduce the pressure in said holding vessel when the pressure in said holding vessel is less than said second selected amount beneath the pressure in said autoclave and for closing said valve when the pressure in said holding vessel is greater than said first selected amount beneath the pressure in said autoclave.
Claim 12
Dependent Claim
127 words
A system as in claim 8 wherein said means responsive to said first output signal and said second output signal comprises an electrical circuit for producing an output signal when the pressure in said holding vessel is less than said second selected amount beneath the pressure in said autoclave and for producing no output signal when the pressure in said holding vessel is greater than said first selected amount beneath the pressure in said autoclave; means connected to open and close said valve; and means for applying said output signal from said electrical circuit to said means connected to open and close said valve thereby to open said valve in response to said output signal and to close said valve during the absence of said output signal.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |