Simultaneous removal of mercury and water from fluids
First Claim
1. A method for simultaneously removing mercury and water from a fluid comprising contacting the fluid with an effective amount of a molecular sieve comprising zeolite A containing on its surface 0.001-15% weight of elemental silver or gold and regenerating the molecular sieve for simultaneous water and mercury removal at elevated temperatures.
1 Assignment
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Accused Products
Abstract
A regenerable molecular sieve comprises 0.001-15% elemental silver or gold in or on zeolite A. The molecular sieve is capable of simultaneously removing mercury and water from a fluid. A method for impregenating zeolite A with elemental silver or gold comprising treating the zeolite A with a solution of a silver or gold salt of a carboxylic acid and heating the impregnated zeolite A at a temperature sufficient to decompose the salt is also provided. A method for simultaneously and repeatedly removing mercury and water from a hydrocarbon fluid by contacting the fluid with an effective amount of a molecular sieve comprising zeolite A and 0.001-15% elemental silver or gold and regenerating the zeolite A at elevated temperatures is also provided.
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Citations
62 Claims
- 1. A method for simultaneously removing mercury and water from a fluid comprising contacting the fluid with an effective amount of a molecular sieve comprising zeolite A containing on its surface 0.001-15% weight of elemental silver or gold and regenerating the molecular sieve for simultaneous water and mercury removal at elevated temperatures.
- 13. A method for simultaneously removing mercury and water from a fluid comprising contacting the fluid with an effective amount of a molecular sieve comprising zeolite A containing in its cavities 0.001-5% by weight of elemental silver or gold and regenerating the molecular sieve for simultaneous water and mercury removal at elevated temperatures.
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23. A method for simultaneously removing mercury and water from a gas comprising contacting the gas with an effective amount of a molecular sieve comprising zeolite 4A containing on its surface 0.001-15% by weight of elemental silver and regenerating the molecular sieve for simultaneous water and mercury removal at elevated temperatures.
- 24. A method for simultaneously removing mercury and water from a gas comprising contacting the gas with an effective amount of a molecular sieve comprising zeolite 4A containing ion its cavities 0.001-5% by weight of elemental silver and regenerating the molecular sieve for simultaneous water and mercury removal at elevated temperatures.
- 26. A regenerable molecular sieve capable of simultaneously removing mercury and water from a fluid, comprising zeolite A containing on its surface about 0.001-15% by weight of elemental silver or gold.
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38. A molecular sieve capable of simultaneously removing mercury and water from a fluid, consisting essentially of zeolite A containing on its surface 0.001-10% elemental silver, wherein the zeolite A is capable of being regenerated more than 100 times for such simultaneous removal by heating at 340°
- C. for one hour.
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39. A bed of regenerable zeolite A containing on its surface 0.001-15% by weight of elemental silver or gold capable of simultaneously removing mercury and water from a fluid wherein the zeolite A is substantially uniformly coated with the silver or gold throughout the bed.
- 40. A bed of regenerable zeolite A containing on its surface 0.001-15% by weight of elemental silver or gold capable of simultaneously removing mercury and water from a fluid wherein the silver or gold is more heavily concentrated at the end of the bed away from the direction of fluid flow.
- 44. A regenerable molecular sieve capable of simultaneously removing mercury and water from a gas comprising zeolite 4A containing on its surface about 0.001-15% by weight of elemental silver.
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46. A molecular sieve capable of simultaneously removing mercury and water from a gas, consisting essentially of zeolite 4A containing on its surface 0.001-10% elemental silver, wherein the zeolite 4A is capable of being regenerated more than 100 times for such simultaneous removal by heating at 340°
- C. for one hour.
- 47. A regenerable molecular sieve capable of simultaneously removing mercury and water from a liquid, comprising zeolite A containing in its cavities about 0.001-5% by weight of elemental silver or gold.
- 54. A regenerable molecular sieve capable of simultaneously removing mercury and water from a gas, comprising zeolite 4A containing ion its cavities about 0.001-1% by weight of elemental silver.
- 56. A method for impregnating zeolite A with elemental silver comprising treating zeolite A with a solution of a silver salt capable of decomposing directly to elemental silver and heating the impregnated zeolite A in the absence of oxygen at a temperature sufficient to decompose the silver salt.
- 61. A method for adding elemental silver to zeolite A comprising impregnating zeolite A with a solution of a silver salt and reducing the silver salt impregnated on the zeolite A to elemental silver.
Specification