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WO2008017899A3 - Process for ph-control and stoichiometric ph-stat mean - Google Patents

Process for ph-control and stoichiometric ph-stat mean Download PDF

Info

Publication number
WO2008017899A3
WO2008017899A3 PCT/HU2007/000070 HU2007000070W WO2008017899A3 WO 2008017899 A3 WO2008017899 A3 WO 2008017899A3 HU 2007000070 W HU2007000070 W HU 2007000070W WO 2008017899 A3 WO2008017899 A3 WO 2008017899A3
Authority
WO
WIPO (PCT)
Prior art keywords
value
titrant
fixed
measured
stoichiometric
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.)
Ceased
Application number
PCT/HU2007/000070
Other languages
French (fr)
Other versions
WO2008017899A2 (en
Inventor
Marta Szekeres
Tamas Fuelei
Zoltan Gingl
Etelka Tombacz
Imre Dekany
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.)
University of Szeged
Original Assignee
University of Szeged
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 University of Szeged filed Critical University of Szeged
Publication of WO2008017899A2 publication Critical patent/WO2008017899A2/en
Publication of WO2008017899A3 publication Critical patent/WO2008017899A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D21/00—Control of chemical or physico-chemical variables, e.g. pH value
    • G05D21/02—Control of chemical or physico-chemical variables, e.g. pH value characterised by the use of electric means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Non-Electrical Variables (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

The present invention relates to a process for adjusting pH to a fixed value and a stoichiometric pH-stat means (10) for completing the process. The process comprises the steps of (a) measuring a pH-value in a system of known reactants with reactions of known courses; (b) establishing at least one equilibrium material balance equation and at least one electroneutrality equation, wherein the reactants are taken as components; (c) solving the equations and determining thereby an amount of titrant required to decrease the difference between the measured pH-value of the system and the fixed pH-value to be reached; (d) adding a single type of titrant to the system along with applying the calculated amount of titrant as control parameter, whereby converging the measured pH- value of the system towards the fixed pH- value, wherein the added titrant is of the action of the compensation for the change in pH occurring in the system without intervention, and, if desired, in cases where the difference between the measured pH-value and the fixed pH- value exceeds a threshold value, repeating steps (a) to (d) with the same type of titrant until the reactions of the system take place or are interrupted, whereby maintaining the pH-value of the system at the fixed value (within a given tolerance level).
PCT/HU2007/000070 2006-08-08 2007-08-08 Process for ph-control and stoichiometric ph-stat mean Ceased WO2008017899A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU0600636A HU227659B1 (en) 2006-08-08 2006-08-08 Process for ph-control and stochiometric ph-stat apparatus
HUP0600636 2006-08-08

Publications (2)

Publication Number Publication Date
WO2008017899A2 WO2008017899A2 (en) 2008-02-14
WO2008017899A3 true WO2008017899A3 (en) 2008-11-13

Family

ID=89986956

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/HU2007/000070 Ceased WO2008017899A2 (en) 2006-08-08 2007-08-08 Process for ph-control and stoichiometric ph-stat mean

Country Status (2)

Country Link
HU (1) HU227659B1 (en)
WO (1) WO2008017899A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3212300B1 (en) * 2014-10-30 2019-06-05 GE Healthcare Bio-Sciences AB Method for predicting the dynamic ph range of a buffer
CN116969574B (en) * 2023-08-03 2025-09-26 华能南京金陵发电有限公司 Automatic dosing system and method of use thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1532071A (en) * 1976-02-06 1978-11-15 Niemi A Method for controlling concentration variables of process materials
US4273146A (en) * 1979-01-05 1981-06-16 Phillips Petroleum Company Cooling tower operation with automated pH control and blowdown
JPS58161013A (en) * 1982-03-19 1983-09-24 Toshiba Corp Controller of ph value of water
US5352350A (en) * 1992-02-14 1994-10-04 International Business Machines Corporation Method for controlling chemical species concentration

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1532071A (en) * 1976-02-06 1978-11-15 Niemi A Method for controlling concentration variables of process materials
US4273146A (en) * 1979-01-05 1981-06-16 Phillips Petroleum Company Cooling tower operation with automated pH control and blowdown
JPS58161013A (en) * 1982-03-19 1983-09-24 Toshiba Corp Controller of ph value of water
US5352350A (en) * 1992-02-14 1994-10-04 International Business Machines Corporation Method for controlling chemical species concentration

Also Published As

Publication number Publication date
HUP0600636A2 (en) 2008-03-28
HU227659B1 (en) 2011-10-28
HU0600636D0 (en) 2006-09-28
WO2008017899A2 (en) 2008-02-14

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