Titanyl phthalocyanine Type I processes
AssigneeXerox Corporation
InventorsJames D. Mayo, Terry L. Bluhm, Cheng K. Hsiao, Trevor I. Martin, Ah-Mee Hor
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Abstract
A process for the preparation of titanyl phthalocyanine Type I which comprises the reaction of titanium tetraalkoxide and diminoisoindolene in the presence of a halonaphthalene solvent.
Claims24
A process for the preparation of titanyl phthalocyanine Type I consisting essentially of the addition of titanium tetrabutoxide and diiminoisoindolene to a chloronaphthalene solvent followed by heating;
- thereafter cooling and separating Type I titanyl phthalocyanine;
- and subsequently subjecting the said Type I phthalocyanine to washing with boiling N,N-dimethylformamide followed by washing with a second solvent selected from the group consisting of methanol, acetone and water enabling said Type I titanyl phthalocyanine with a purity equal to at least 99 percent.
A process for the preparation of titanyl phthalocyanine Type I consisting essentially of adding titanium tetrabutoxide to 1,3-diiminoisoindolene in a 1-chloronaphthalene solvent;
- heating said mixture to reflux temperature of from about 130.degree. to about 180.degree. C.;
- removing any volatile byproducts by distillation thereby increasing the reflux temperature from about 180.degree. to about 200.degree. C.;
- maintaining the reaction mixture at said temperature for a time period of from about 0.5 to about 8 hours;
- followed by cooling the reaction mixture to a temperature of from about 130.degree. to about 180.degree. C. by removal of the heat source;
- and filtering said hot mixture to separate the solid titanyl phthalocyanine Type I product and washing with boiling N,N-dimethylformamide followed by washing with a second solvent selected from the group consisting of methanol, acetone and water to provide said Type I titanyl phthalocyanine of a purity of at least 99 percent.
A process for the preparation of titanyl phthalocyanine Type I consisting essentially of the addition of titanium tetraalkoxide wherein alkoxide contains from 1 to about 6 carbon atoms and diiminoisoindolene to a chloronaphthalene solvent followed by heating;
- thereafter cooling and separating Type I titanyl phthalocyanine and susbsequently subjecting said titanyl type phthalocyanine to washing with boiling N,N-dimethylformamide followed by washing with a second solvent selected from the group consisting of methanol, acetone and water.
Dependencies are inferred from the claim text.