Process for the production of dibasic magnesium hypochlorite

• US 4,071,605 A
• Filed: 01/31/1977
• Issued: 01/31/1978
• Est. Priority Date: 01/31/1977
• Status: Expired due to Term

• Current Assignee: OLIN Corporation
• Original Assignee: OLIN Corporation
• Inventors: Wojtowicz, John A.
• Primary Examiner(s): Stern, Edward
• Application Number:
  US05/763,969
• Time in Patent Office: 365 Days
• Field of Search: 423/473, 423/504, 423/462, 423/505, 423/DIG. 15
• US Class Current: 423/462
• CPC Class Codes: C01B 11/066 Magnesium hypochlorite
• CPC Class Codes: D06L 4/23 using hypohalogenites

Abstract

A process for the production of dibasic magnesium hypochlorite comprises the reaction of a solid magnesium salt and a solid hypochlorite where one of the solid reactants is in the hydrate form. The process produces dibasic magnesium hypochlorite with excellent recovery of chlorine values and with reduced requirements for the disposal of solutions containing available chlorine.

Dibasic magnesium hypochlorite, Mg(OCl)₂ . 2 Mg(OH)₂ is useful in bleaching and sanitizing applications.

Claims

1. A process for the production of dibasic magnesium hypochlorite which comprises reacting a solid granular magnesium salt with a solid granular hypochlorite salt selected from the group consisting of alkali metal hypochlorites and calcium hypochlorite wherein at least one of said salts is present as a hydrate to form a reaction mixture, agitating said reaction mixture, and recovering said dibasic magnesium hypochlorite therefrom.

2. The process of claim 1 in which said solid magnesium salt is selected from the group consisting of magnesium acetate, magnesium carbonate, magnesium chlorate, magnesium perchlorate, magnesium chloride, magnesium chromate, magnesium nitrate, magnesium sulfate, and hydrates thereof.

3. The process of claim 1 in which said solid hypochlorite is an alkali metal hypochlorite selected from the group consisting of lithium hypochlorite and sodium hypochlorite dihydrate.

4. The process of claim 1 in which said solid hypochlorite salt is selected from the group consisting of anhydrous calcium hypochlorite, hydrated calcium hypochlorite, calcium hypochlorite dihydrate, calcium hypochlorite trihydrate and calcium hypochlorite tetrahydrate.

5. The process of claim 2 in which said solid magnesium salt is selected from the group consisting of magnesium acetate, magnesium chloride, magnesium nitrate, magnesium sulfate and hydrates thereof.

6. The process of claim 5 in which said solid hypochlorite salt is selected from the group consisting of anhydrous calcium hypochlorite, hydrated calcium hypochlorite, calcium hypochlorite dihydrate, calcium hypochlorite trihydrate and calcium hypochlorite tetrahydrate.

7. The process of claim 6 in which said solid hypochlorite salt is anhydrous calcium hypochlorite.

8. The process of claim 7 in which said solid magnesium salt is selected from the group consisting of magnesium acetate, magnesium chloride, magnesium nitrate and hydrates thereof.

9. The process of claim 8 in which said solid magnesium salt is magnesium chloride hexahydrate.

10. The process of claim 8 in which said solid magnesium salt is magnesium nitrate hexahydrate.

11. The process of claim 2 in which said solid magnesium salt is selected from the group consisting of magnesium acetate tetrahydrate, magnesium carbonate hexahydrate, magnesium chlorate hexahydrate, magnesium perchlorate hexahydrate, magnesium chloride hexahydrate, magnesium chromate, magnesium nitrate dihydrate, magnesium nitrate hexahydrate, magnesium sulfate monohydrate and magnesium sulfate heptahydrate.

12. The process of claim 11 in which said solid hypochlorite salt is selected from the group consisting of hydrated calcium hypochlorite, calcium hypochlorite dihydrate, calcium hypochlorite trihydrate and calcium hypochlorite tetrahydrate.