GB1375947A - Control of freeze-drying process - Google Patents

Control of freeze-drying process

Info

Publication number
GB1375947A
GB1375947A GB476972A GB476972A GB1375947A GB 1375947 A GB1375947 A GB 1375947A GB 476972 A GB476972 A GB 476972A GB 476972 A GB476972 A GB 476972A GB 1375947 A GB1375947 A GB 1375947A
Authority
GB
United Kingdom
Prior art keywords
mirror
vapour pressure
temperature
control
detector
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.)
Expired
Application number
GB476972A
Other languages
English (en)
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.)
Leybold Heraeus Verwaltung GmbH
Original Assignee
Leybold Heraeus Verwaltung GmbH
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 Leybold Heraeus Verwaltung GmbH filed Critical Leybold Heraeus Verwaltung GmbH
Publication of GB1375947A publication Critical patent/GB1375947A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/20—Control of fluid pressure characterised by the use of electric means
    • G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
    • G05D16/2066—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using controlling means acting on the pressure source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
    • F26B5/06—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum the process involving freezing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L21/00—Vacuum gauges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
    • G01N25/66—Investigating or analyzing materials by the use of thermal means by investigating moisture content by investigating dew-point
    • G01N25/68—Investigating or analyzing materials by the use of thermal means by investigating moisture content by investigating dew-point by varying the temperature of a condensing surface

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Molecular Biology (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Drying Of Solid Materials (AREA)
GB476972A 1971-02-01 1972-02-01 Control of freeze-drying process Expired GB1375947A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712104499 DE2104499A1 (de) 1971-02-01 1971-02-01 Steuerung und/oder Überwachung von Prozessen in Abhängigkeit vom Dampfdruck, insbesondere bei der Gefriertrocknung

Publications (1)

Publication Number Publication Date
GB1375947A true GB1375947A (en) 1974-12-04

Family

ID=5797455

Family Applications (1)

Application Number Title Priority Date Filing Date
GB476972A Expired GB1375947A (en) 1971-02-01 1972-02-01 Control of freeze-drying process

Country Status (7)

Country Link
US (1) US3812596A (enExample)
BE (1) BE778455A (enExample)
CH (1) CH531748A (enExample)
DE (1) DE2104499A1 (enExample)
FR (1) FR2124779A5 (enExample)
GB (1) GB1375947A (enExample)
NL (1) NL7116279A (enExample)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8514584D0 (en) * 1985-06-10 1985-07-10 Shell Int Research Measuring dew-point of gas stream
US5299867A (en) * 1992-06-30 1994-04-05 Buck Arden L Low moisture cryogenic hygrometer
DE19719398A1 (de) * 1997-05-07 1998-11-12 Amsco Finn Aqua Gmbh Verfahren zur Steuerung eines Gefriertrocknungsprozesses
US6390668B1 (en) * 1998-12-11 2002-05-21 Peter Albert Materna Blackbody source using a heat pipe principle and transition region
SE0001453D0 (sv) * 2000-04-19 2000-04-19 Astrazeneca Ab Method of monitoring a freeze drying process
ES2399140T3 (es) * 2006-04-10 2013-03-26 F. Hoffmann-La Roche Ag Aparato para monitorizar el proceso de liofilización
US20180120026A1 (en) * 2016-11-01 2018-05-03 Steven Finley Methods for measuring pressure in freeze drying systems
CN109490366B (zh) * 2018-10-31 2021-05-11 北京建筑大学 一种可视化脉动热管实验系统及实验方法
CN115144429B (zh) * 2022-09-01 2022-11-11 中国有色金属工业昆明勘察设计研究院有限公司 一种深部饱和松软尾矿原状样冻胀试验系统及方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1698905A (en) * 1923-11-12 1929-01-15 John T Beechlyn Apparatus for projecting light
US3166928A (en) * 1961-06-28 1965-01-26 Justin M Jackson Electrical automatic dew point hygrometer
US3252319A (en) * 1964-01-06 1966-05-24 Ind Instr Inc Dew point device with proportional control circuit
US3483389A (en) * 1968-01-23 1969-12-09 Dynamics Res Corp Electro-optical encoder having fiber optic coupling

Also Published As

Publication number Publication date
BE778455A (fr) 1972-02-15
FR2124779A5 (enExample) 1972-09-22
DE2104499A1 (de) 1972-08-10
CH531748A (de) 1972-12-15
US3812596A (en) 1974-05-28
NL7116279A (enExample) 1972-08-03

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees