Solid Molded Sulfite-Based Oxygen Scavenger Composition and Method of Manufacutre

A sulfite-based composition for treating heated water systems to reduce corrosion, the sulfite-based composition comprising the following ingredients:

• 60 to 80% by weight of a first inorganic salt;
• 5 to 30% by weight of a second inorganic salt;
• and
• 10 to 30% by weight of deionized water;
• wherein the first inorganic salt is a sulfite;
• and
• wherein the second inorganic salt is capable of forming a hydrate having a melting point of at least 40° C.

A method of making a solid sulfite-based composition, the method comprising:

• heating water to a first temperature range;
• adding and mixing a first inorganic salt to the water after heating the water to form a first mixture;
• adding and mixing a second inorganic salt to the first mixture to form a second mixture;
• pouring the second mixture into a mold;
• curing the second mixture in the mold until it is solid;
• wherein the first inorganic salt is a sulfite salt;
• and
• wherein the solid sulfite-based composition is thermally stable at temperatures between 35° C.-40° C.

A method of treating a water system comprising:

• adding a sulfite-based composition to the water system, the sulfite-based composition comprising (1) first inorganic salt, and (2) a hydrate of a second inorganic salt;
• wherein the first inorganic salt is a sulfite;
• wherein the sulfite-based composition is in a solid form prior to adding the sulfite-based composition to the water system, wherein the solid form is thermally stable at temperatures between 35° C.-40° C.;
• and
• wherein the water system is a heated water system or boiler system.