CH286322A - Process for the preparation of a whitening agent. - Google Patents

Process for the preparation of a whitening agent.

Info

Publication number
CH286322A
CH286322A CH286322DA CH286322A CH 286322 A CH286322 A CH 286322A CH 286322D A CH286322D A CH 286322DA CH 286322 A CH286322 A CH 286322A
Authority
CH
Switzerland
Prior art keywords
preparation
whitening agent
whitening
agent
Prior art date
Application number
Other languages
German (de)
Inventor
Ag J R Geigy
Original Assignee
Ag J R Geigy
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 Ag J R Geigy filed Critical Ag J R Geigy
Publication of CH286322A publication Critical patent/CH286322A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
    • C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
    • C07D311/42—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms in positions 2 and 4
    • C07D311/44—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms in positions 2 and 4 with one hydrogen atom in position 3
    • C07D311/46—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms in positions 2 and 4 with one hydrogen atom in position 3 unsubstituted in the carbocyclic ring
    • C07D311/48—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms in positions 2 and 4 with one hydrogen atom in position 3 unsubstituted in the carbocyclic ring with two such benzopyran radicals linked together by a carbon chain

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pyrane Compounds (AREA)
CH286322D 1950-07-11 1949-05-27 Process for the preparation of a whitening agent. CH286322A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE297356X 1950-07-11

Publications (1)

Publication Number Publication Date
CH286322A true CH286322A (en) 1952-10-15

Family

ID=6090649

Family Applications (2)

Application Number Title Priority Date Filing Date
CH286322D CH286322A (en) 1950-07-11 1949-05-27 Process for the preparation of a whitening agent.
CH297356D CH297356A (en) 1950-07-11 1951-07-07 Needlework on a jacquard machine.

Family Applications After (1)

Application Number Title Priority Date Filing Date
CH297356D CH297356A (en) 1950-07-11 1951-07-07 Needlework on a jacquard machine.

Country Status (2)

Country Link
BE (1) BE491061A (en)
CH (2) CH286322A (en)

Also Published As

Publication number Publication date
CH297356A (en) 1954-03-31
BE491061A (en)

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