oil gas fired boiler for textile industry in Egypt

While I have specifically described the preferred embodiment of my invention, it is to be understood that the invention is not so limited, but may be otherwise embodied and practiced within the scope of the following claims.

I claim:

1. The process of treating the water in a steam boiler, which comprises supplying to the boiler water a chemical containing a molecularly dehydrated phosphate radical which is rehydrated’ in the water in the boiler to a condition of greater alkali-neutralizing capacity, and an alkali-metal chromate which protects the boiler metal against corrosion. v

2. The process’of treating water for steam boilers, which comprises supplying to the water an alkali-metal metaphosphate and an alkalimetal chromate. 1

3. The process of treating water for steam boilers, which comprises supplying to the water an alkali-metal pyrophosphate and an alkalimetal chromate.

4. The process of treating water for steam boilers, which comprises supplying to the water an alkali-metal metaphosphate, an alkali-metal pyrophosphate and an alkali-metal chromate.

5. The process of treating water for steam boilers, which comprises supplying thereto a molecularly dehydrated phosphate radical which is rehydrated in the water in the boiler to yield acid hydrogen which neutralizes excess alkalinity in the water in the boiler and orthophosphate which prevents deposition of adherent boiler scale, and an alkali-metal chromate which protects the boiler metal against corrosion.

6. The process of treating water for steam boilers, which comprises supplying thereto a sufficient amount of molecularly dehydrated phosphate radical to yield upon rehydration in the water in the boiler suificient acid hydrogen to maintain the alkalinity therein at a pH value of not over about 11 and to yield suflicient orthophosphate to prevent the deposition of adherent boiler scale, and an alkali-metal chromate in sufficient amount to maintain a concentration in the water in the boiler of not less than about 100 parts per million of alkali-metal chromate.

7. The process of treating water for steam boilers, which comprises supplying thereto a phosphate which yields acid hydrogen to control the alkalinity of the boiler water and orthophosphate to prevent’deposition of adherent boiler scale, and a chromate which protects the boiler metal against corrosion.

8. A composition for the treatment of water for steam boilers, comprising a chemical containing a molecularly dehydrated phosphate radical which is re-hydrated in the water in the boiler to a condition of greater alkali-neutralizing capacity, and an alkali-metal chromate which protects the boiler metal against corrosion.

9. A composition for the treatment of water for steam boilers, comprising an alkali-metal metaphosphate and an alkali-metal chromate.

10. A composition for the treatment of water for steam boilers, comprising an alkali-metal pyrophosphate and an alkali-metal chromate.

11. A composition for the treatment of water for steam boilers, comprising an alkali-metal metaphosphate, an alkali-metal pyrophosphate, and an alkali-metal chromate.

12. A composition for the treatment of water for steam boilers. comprising a molecularly dehydrated phosphate radical which is re-hydrated in the water in the boiler to yield acid hydrogen which neutralizes excess alkalinity in the water in the boiler and orthophosphate which prevents deposition of adherent boiler scale, and an alkali-metal chromate which protects the boiler metal against corrosion.

13. A composition for the treatment of water for steam boilers, comprising a phosphate which yields acid hydrogen to control the alkalinity of the boiler water and orthophosphate to prevent deposition of adherent scale, and a chromate which protects the boiler metal against corrosion.

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