JPS575761A - Novel preparation of dioxazine violet pigment - Google Patents
Novel preparation of dioxazine violet pigmentInfo
- Publication number
- JPS575761A JPS575761A JP8041280A JP8041280A JPS575761A JP S575761 A JPS575761 A JP S575761A JP 8041280 A JP8041280 A JP 8041280A JP 8041280 A JP8041280 A JP 8041280A JP S575761 A JPS575761 A JP S575761A
- Authority
- JP
- Japan
- Prior art keywords
- pigment
- hydrogen halide
- dioxazine violet
- contact
- hydrogen
- 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.)
- Pending
Links
Landscapes
- Nitrogen Condensed Heterocyclic Rings (AREA)
Abstract
PURPOSE: To obtain pigment industrially advantageously using an inexpensive agnet without requiring waste water treatment, by bringing crude dioxazine violet into contact with a hydrogen halide in an inert solvent.
CONSTITUTION: Crude dioxazine violet is suspended in a solvent (e.g., benzene, toluene, etc.) inert to hydrogen halide in an amount preferably 3W20 times as much as that of the crude dioxazine violet. The suspension, for example, is stirred for 1 to ten and several hours at room temperature to 150°C while being in contact with the hydrogen halide (preferably hydrogen chloride, hydrogen bromide), to give pigment.
EFFECT: Immediately after synthesis in an inert solvent, pigment can be prepared by introducing hydrogen halide, and the particle size of the pigment can be selected by changing the contact temperature with the hydrogen halide.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8041280A JPS575761A (en) | 1980-06-13 | 1980-06-13 | Novel preparation of dioxazine violet pigment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8041280A JPS575761A (en) | 1980-06-13 | 1980-06-13 | Novel preparation of dioxazine violet pigment |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS575761A true JPS575761A (en) | 1982-01-12 |
Family
ID=13717572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8041280A Pending JPS575761A (en) | 1980-06-13 | 1980-06-13 | Novel preparation of dioxazine violet pigment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS575761A (en) |
-
1980
- 1980-06-13 JP JP8041280A patent/JPS575761A/en active Pending
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