Claims
- 1. A method of producing sodium pheophorbide a, comprising:
- dissolving sodium hydroxide in a solvent selected from the group consisting of n-propyl alcohol, isopropyl alcohol and a mixture of n-propyl alcohol and isopropyl alcohol to prepare a solution of the sodium hydroxide;
- dissolving pheophorbide a in a solvent which is miscible with said solvent selected from n-propyl alcohol, isopropyl alcohol and a mixture of n-propyl alcohol and isopropyl alcohol to prepare a solution of the pheophorbide a; and
- dissolving said solution of the pheophorbide a in said solution of sodium hydroxide to obtain sodium pheophorbide a.
- 2. A method as defined by claim 1, wherein the sodium pheophorbide a is obtained as a precipitate.
- 3. A method as defined by claim 2, including the further step of centrifugally separating the sodium pheophorbide a precipitate from the solvents.
- 4. A method as defined by claim 3, including the further step of drying the separated precipitate.
- 5. A method as defined by claim 1, wherein the pheophorbide a is dissolved in a solvent selected from the group consisting of ether, acetone and chloroform.
- 6. A method as defined by claim 1, wherein the sodium hydroxide solvent is n-propyl alcohol.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2-258136 |
Sep 1990 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 07/760,451 field Sep. 17, 1991, now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (1)
Number |
Date |
Country |
61-83185 |
Apr 1986 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
760451 |
Sep 1991 |
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