Composition for production of a sterilizer and a process for producing organic peracid

1. A method of sterilizing a material to be sterilized, which comprises contacting, with a material to be sterilized, an aqueous solution containing an organic peracid obtained by reacting (A) an ester of a polyhydric alcohol and an organic acid having a hydrocarbon group which may have a hydroxyl group with (B1) hydrogen peroxide in an (A)/(B1) molar ratio of 1/5 to 10/1 in water adjusted to a pH of 8 to 12 with an alkaline pH adjusting agent, and then adjusting the reaction system to pH 1 to 5;

wherein the reaction of (A) with (B1) in water at pH 8 to 12 is carried out at 5 to 50° C. for 1 to 120 minutes, and

a molar ratio of the component (B1) to one ester group of the component (A) is 2 or less.

2. The sterilizing method according to claim 1 , wherein the content of hydrogen peroxide is 0.5 wt % or less.

3. A process for producing an organic peracid, which comprises a step of reacting (A) an ester of a polyhydric alcohol and an organic acid having a hydrocarbon group which may have a hydroxyl group with (B1) hydrogen peroxide in an (A)/(B1) molar ratio of 1/5 to 10/1 in water adjusted to a pH of 8 to 12 with an alkaline pH adjusting agent, and then adjusting the reaction system to pH 1 to 5;

wherein the reaction of (A) with (B1) in water at pH 8 to 12 is carried out at 5 to 50° C. for 1 to 120 minutes, and

a molar ratio of the component (B1) to one ester group of the component (A) is 2 or less.

4. A process for producing a sterilizer composition, which comprises a step of reacting (A) an ester of a polyhydric alcohol and an organic acid having a hydrocarbon group which may have a hydroxyl group with (B1) hydrogen peroxide in an (A)/(B1) molar ratio of 1/5 to 10/1 in water adjusted to a pH of 8 to 12 with an alkaline pH adjusting agent, and then adjusting the reaction system to pH 1 to 5;

wherein the reaction of (A) with (B1) in water at pH 8 to 12 is carried out at 5 to 50° C. for 1 to 120 minutes, and

a molar ratio of the component (B1) to one ester group of the component (A) is 2 or less.

5. The process according to claim 4 , wherein the content of hydrogen peroxide in the sterilizer composition is 0.5 wt % or less.

6. The process according to claim 4 , wherein the polyhydric alcohol constituting (A) is a C2 to C12 polyhydric alcohol.

7. The process according to claim 4 , wherein the organic acid constituting (A) is a C1 to C8 fatty acid.

8. The sterilizing method according to claim 1 , wherein the pH of the reaction system before adjustment is 9 to 11.

9. The process according to claim 3 , wherein the pH of the reaction system before adjustment is 9 to 11.

10. The process according to claim 4 , wherein the pH of the reaction system before adjustment is 9 to 11.

11. The sterilizing method according to claim 1 , wherein the reaction system is adjusted to pH 3.8 to 5.

12. The process according to claim 3 , wherein the reaction system is adjusted to pH 3.8 to 5.

13. The process according to claim 4 , wherein the reaction system is adjusted to pH 3.8 to 5.