FR2442794A1 - Alkaline orthophosphate soln. prodn. - by continuous neutralisation of phosphoric acid in single multicompartment reaction vessel - Google Patents

Alkaline orthophosphate soln. prodn. - by continuous neutralisation of phosphoric acid in single multicompartment reaction vessel

Info

Publication number
FR2442794A1
FR2442794A1 FR7835131A FR7835131A FR2442794A1 FR 2442794 A1 FR2442794 A1 FR 2442794A1 FR 7835131 A FR7835131 A FR 7835131A FR 7835131 A FR7835131 A FR 7835131A FR 2442794 A1 FR2442794 A1 FR 2442794A1
Authority
FR
France
Prior art keywords
prodn
phosphoric acid
reaction vessel
soln
continuous
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.)
Withdrawn
Application number
FR7835131A
Other languages
French (fr)
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.)
OBISPO MIGUEL
Original Assignee
OBISPO MIGUEL
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 OBISPO MIGUEL filed Critical OBISPO MIGUEL
Priority to FR7835131A priority Critical patent/FR2442794A1/en
Publication of FR2442794A1 publication Critical patent/FR2442794A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/18—Stationary reactors having moving elements inside
    • B01J19/1862—Stationary reactors having moving elements inside placed in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0086—Processes carried out with a view to control or to change the pH-value; Applications of buffer salts; Neutralisation reactions
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/26—Phosphates
    • C01B25/30—Alkali metal phosphates
    • C01B25/301—Preparation from liquid orthophosphoric acid or from an acid solution or suspension of orthophosphates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00051—Controlling the temperature
    • B01J2219/00054—Controlling or regulating the heat exchange system
    • B01J2219/00056—Controlling or regulating the heat exchange system involving measured parameters
    • B01J2219/00058—Temperature measurement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00051—Controlling the temperature
    • B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00164—Controlling or regulating processes controlling the flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/00049—Controlling or regulating processes
    • B01J2219/00182—Controlling or regulating processes controlling the level of reactants in the reactor vessel

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Luminescent Compositions (AREA)

Abstract

Prodn. of solns. of alkaline orthophosphates effected by continuous neutralisation of thermic or wet process phosphoric acid in a single reaction vessel used for prepn. of polyphosphates e.g. sodium tripolyphosphate which is a basic material for the preparation of washing powders, liqs. etc. Process allows rigorous control of the ratio of acid to base to give the desired polyphosphate after calcination of the orthophosphate; in the past this control has usually necessitated batch processing or when a continuous process was employed has necessitated several (a cascade) reaction vessels.
FR7835131A 1978-12-01 1978-12-01 Alkaline orthophosphate soln. prodn. - by continuous neutralisation of phosphoric acid in single multicompartment reaction vessel Withdrawn FR2442794A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7835131A FR2442794A1 (en) 1978-12-01 1978-12-01 Alkaline orthophosphate soln. prodn. - by continuous neutralisation of phosphoric acid in single multicompartment reaction vessel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7835131A FR2442794A1 (en) 1978-12-01 1978-12-01 Alkaline orthophosphate soln. prodn. - by continuous neutralisation of phosphoric acid in single multicompartment reaction vessel

Publications (1)

Publication Number Publication Date
FR2442794A1 true FR2442794A1 (en) 1980-06-27

Family

ID=9216081

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7835131A Withdrawn FR2442794A1 (en) 1978-12-01 1978-12-01 Alkaline orthophosphate soln. prodn. - by continuous neutralisation of phosphoric acid in single multicompartment reaction vessel

Country Status (1)

Country Link
FR (1) FR2442794A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1298147A2 (en) * 2001-09-28 2003-04-02 Nippon Shokubai Co., Ltd. Apparatus and method for preparation and supply of polymerization inhibitor

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB841416A (en) * 1958-04-26 1960-07-13 Drew & Co Inc E F Improvements in or relating to apparatus for carrying out chemical reactions
US3125420A (en) * 1964-03-17 Compact reactor for production of fertilizer solids
US3251657A (en) * 1962-05-11 1966-05-17 Hoechst Ag Reactor for the manufacture of polyethylene phthalates
FR2074119A5 (en) * 1969-12-23 1971-10-01 Sir Soc Italiana Resine Spa
FR2087779A5 (en) * 1970-02-09 1971-12-31 Parkson Corp
FR2211282A1 (en) * 1972-12-21 1974-07-19 Perstorp Ab
GB1377360A (en) * 1970-12-08 1974-12-11 Fisons Ltd Reactor
JPS5278770A (en) * 1975-12-26 1977-07-02 Nobuko Asayama Closed square curving reactor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125420A (en) * 1964-03-17 Compact reactor for production of fertilizer solids
GB841416A (en) * 1958-04-26 1960-07-13 Drew & Co Inc E F Improvements in or relating to apparatus for carrying out chemical reactions
US3251657A (en) * 1962-05-11 1966-05-17 Hoechst Ag Reactor for the manufacture of polyethylene phthalates
FR2074119A5 (en) * 1969-12-23 1971-10-01 Sir Soc Italiana Resine Spa
FR2087779A5 (en) * 1970-02-09 1971-12-31 Parkson Corp
GB1377360A (en) * 1970-12-08 1974-12-11 Fisons Ltd Reactor
FR2211282A1 (en) * 1972-12-21 1974-07-19 Perstorp Ab
JPS5278770A (en) * 1975-12-26 1977-07-02 Nobuko Asayama Closed square curving reactor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1298147A2 (en) * 2001-09-28 2003-04-02 Nippon Shokubai Co., Ltd. Apparatus and method for preparation and supply of polymerization inhibitor
EP1298147A3 (en) * 2001-09-28 2004-02-04 Nippon Shokubai Co., Ltd. Apparatus and method for preparation and supply of polymerization inhibitor
US6899452B2 (en) 2001-09-28 2005-05-31 Nippon Shokubai Co., Inc. Apparatus and method for preparation and supply of polymerization inhibitor

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Legal Events

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ST Notification of lapse