NL6910541A - Repeated batchwise diazo dye prepn with - automatic compensation - Google Patents

Repeated batchwise diazo dye prepn with - automatic compensation

Info

Publication number
NL6910541A
NL6910541A NL6910541A NL6910541A NL6910541A NL 6910541 A NL6910541 A NL 6910541A NL 6910541 A NL6910541 A NL 6910541A NL 6910541 A NL6910541 A NL 6910541A NL 6910541 A NL6910541 A NL 6910541A
Authority
NL
Netherlands
Prior art keywords
amount
prepn
minus
plus
concentration
Prior art date
Application number
NL6910541A
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 filed Critical
Priority to NL6910541A priority Critical patent/NL6910541A/en
Publication of NL6910541A publication Critical patent/NL6910541A/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B41/00—Special methods of performing the coupling reaction
    • C09B41/006—Special methods of performing the coupling reaction characterised by process features
    • C09B41/007—Special methods of performing the coupling reaction characterised by process features including condition or time responsive control, e.g. automatically controlled processes; Stepwise coupling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Control Of Non-Electrical Variables (AREA)

Abstract

One component in each load for one of the two reactions involved (diazotising and coupling) is over- or under-charged by using an amount of solution or suspension represented by V1 having a concentration K1 plus-or-minus a. To the 2nd reaction a smaller amount V3 = V2 x((K1-a)/K1)x(K2-b)/K2, or a larger amount V4 >= V2 x((K1+a)/K1)x(K2+b)/K2 is added automatically the concentration being K2 plus-or-minus b. V2 is the theoretically required amount, calculated on V1 with concentrations K1, K2. The amount V3 or V4 is made to depend automatically on the amount of diazo compound solution or suspension remaining after the previous coupling reaction. The process is pref. controlled by sensors for residual diazo compound and a memory- and the necessary auxiliary timing circuits. Process control becomes very precise and simple weighing errors are eliminated, in many cases analytical product control tests can be simplified.
NL6910541A 1969-07-09 1969-07-09 Repeated batchwise diazo dye prepn with - automatic compensation NL6910541A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL6910541A NL6910541A (en) 1969-07-09 1969-07-09 Repeated batchwise diazo dye prepn with - automatic compensation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6910541A NL6910541A (en) 1969-07-09 1969-07-09 Repeated batchwise diazo dye prepn with - automatic compensation

Publications (1)

Publication Number Publication Date
NL6910541A true NL6910541A (en) 1971-01-12

Family

ID=19807433

Family Applications (1)

Application Number Title Priority Date Filing Date
NL6910541A NL6910541A (en) 1969-07-09 1969-07-09 Repeated batchwise diazo dye prepn with - automatic compensation

Country Status (1)

Country Link
NL (1) NL6910541A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439361A (en) * 1981-02-07 1984-03-27 Hoechst Aktiengesellschaft Process for controlling diazotization reactions involving nitrous reactant by testing the air above the reaction batch for its content of nitrous gases and feeding nitrous reactant in accordance with said content

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4439361A (en) * 1981-02-07 1984-03-27 Hoechst Aktiengesellschaft Process for controlling diazotization reactions involving nitrous reactant by testing the air above the reaction batch for its content of nitrous gases and feeding nitrous reactant in accordance with said content

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