HYDROGEN SULFIDE SCAVENGER

Abstract

The present disclosure is related to a family of metals chelates for use as a hydrogen sulfide scavenger in asphalt, and the preparation thereof. The metal chelates, in particular amino acid metal chelates, are particularly efficient at reducing the hydrogen sulfide emissions of asphalt.

Claims

1. A composition comprising: (i) asphalt or an asphalt mix, and (ii) an amino acid metal chelate.

2. The composition of claim 1, wherein the amino acid metal chelate is selected from the group consisting of Boron Amino Acid Chelate; Boron Aspartate; Boron Citrate; Boron Glycinate; Calcium Alphaketoglutarate; Calcium Amino Acid Chelate; Calcium Arginate; Calcium Ascorbate; Calcium Aspartate; Calcium Caprylate; Calcium Carbonate; Calcium Citrate Malate; Calcium Glycinate; Calcium D-Glucarate; Calcium Krebs Cycle; Calcium Lactate; Calcium Malate; Calcium Orotate; Calcium Succinate; Chromium Amino Acid Chelate; Chromium Arginate; Chromium Chloride; Chromium Dinicotinate/Glycinate; Chromium Picolinate; Chromium Nicotinate; Chromium Trit; Chromium Yeast; Chromium Nicotinate/Glycinate; Copper Amino Acid Chelate; Copper Aspartate; Copper Carbonate; Copper Citrate; Copper Gluconate; Copper Bis-Glycinate; Copper Glycinate; Copper Sulfate; Copper Yeast; Iron Amino Acid Chelate; Iron Aspartate; Iron Bis-Glycinate HCl Soluble; Iron Citrate; Iron Fumarate; Iron Gluconate; Iron Glycinate; Iron Sulfate; Iron Yeast; Lithium Aspartate; Lithium Orotate; Magnesium Alphaketoglutarate; Magnesium Amino Acid Chelate; Magnesium Ascorbate; Magnesium Aspartate; Magnesium Citrate; Magnesium Gluconate; Magnesium Glycinate; Magnesium Malate; Magnesium Orotate; Magnesium Oxide; Magnesium Succinate; Magnesium Taurinate; Magnesium Yeast; Manganese Amino Acid Chelate; Manganese Aspartate; Manganese Carbonate; Manganese Citrate; Manganese Gluconate; Mananese Glycinate; Manganese Sulfate; Manganese Yeast; Molybdenum Amino Acid Chelate; Molybdenum Trit; Molybdenum Yeast; Sodium Molybdate; Phosphorus Amino Acid Chelate; Dicalcium Phosphate; Potassium Amino Acid Chelate; Potassium Ascorbate; Potassium Aspartate; Potassium Citrate; Potassium Chloride; Potassium D-Glucarate; Potassium Gluconate; Potassium Glycerophosphate; Potassium Iodide Trit; Potassium Succinate; Selenium Amino Acid Chelate; Selenium Aspartate; L-Selenomethionine; Selenium Yeast; Sodium Selenate; Sodium Selenite; Strontium Aspartate; Strontium Citrate; Strontium Glycinate; Vanadium Amino Acid Chelate; Vanadium Citrate; Bis-Maltolato Oxo Vanadium; Vanadyl Sulfate; Sodium Metavanadate; Zinc Acetate; Zinc Arginate; Zinc Amino Acid Chelate; Zinc Ascorbate; Zinc Aspartate; Zinc Gluconate; Zinc Bis-Glycinate; Zinc Glycinate; Zinc Methionate; Zinc Oxide; Zinc Picolinate; Zinc Sulfate; and Zinc Yeast and mixtures thereof.

3. The composition of claim 1, wherein the amino acid metal chelate is selected from the group consisting of copper bis-glycinate and zinc bis-glycinate.

4. A method of reducing hydrogen sulfide emission from asphalt or from the preparation of asphalt, comprising the step of: (i) combining an amino acid metal chelate to asphalt or asphalt mix

5. The method of claim 4 wherein the amino acid metal chelate is selected from the group consisting of Boron Amino Acid Chelate; Boron Aspartate; Boron Citrate; Boron Glycinate; Calcium Alphaketoglutarate; Calcium Amino Acid Chelate; Calcium Arginate; Calcium Ascorbate; Calcium Aspartate; Calcium Caprylate; Calcium Carbonate; Calcium Citrate Malate; Calcium Glycinate; Calcium D-Glucarate; Calcium Krebs Cycle; Calcium Lactate; Calcium Malate; Calcium Orotate; Calcium Succinate; Chromium Amino Acid Chelate; Chromium Arginate; Chromium Chloride; Chromium Dinicotinate/Glycinate; Chromium Picolinate; Chromium Nicotinate; Chromium Trit; Chromium Yeast; Chromium Nicotinate/Glycinate; Copper Amino Acid Chelate; Copper Aspartate; Copper Carbonate; Copper Citrate; Copper Gluconate; Copper Bis-Glycinate; Copper Glycinate; Copper Sulfate; Copper Yeast; Iron Amino Acid Chelate; Iron Aspartate; Iron Bis-Glycinate HCl Soluble; Iron Citrate; Iron Fumarate; Iron Gluconate; Iron Glycinate; Iron Sulfate; Iron Yeast; Lithium Aspartate; Lithium Orotate; Magnesium Alphaketoglutarate; Magnesium Amino Acid Chelate; Magnesium Ascorbate; Magnesium Aspartate; Magnesium Citrate; Magnesium Gluconate; Magnesium Glycinate; Magnesium Malate; Magnesium Orotate; Magnesium Oxide; Magnesium Succinate; Magnesium Taurinate; Magnesium Yeast; Manganese Amino Acid Chelate; Manganese Aspartate; Manganese Carbonate; Manganese Citrate; Manganese Gluconate; Mananese Glycinate; Manganese Sulfate; Manganese Yeast; Molybdenum Amino Acid Chelate; Molybdenum Trit; Molybdenum Yeast; Sodium Molybdate; Phosphorus Amino Acid Chelate; Dicalcium Phosphate; Potassium Amino Acid Chelate; Potassium Ascorbate; Potassium Aspartate; Potassium Citrate; Potassium Chloride; Potassium D-Glucarate; Potassium Gluconate; Potassium Glycerophosphate; Potassium Iodide Trit; Potassium Succinate; Selenium Amino Acid Chelate; Selenium Aspartate; L-Selenomethionine; Selenium Yeast; Sodium Selenate; Sodium Selenite; Strontium Aspartate; Strontium Citrate; Strontium Glycinate; Vanadium Amino Acid Chelate; Vanadium Citrate; Bis-Maltolato Oxo Vanadium; Vanadyl Sulfate; Sodium Metavanadate; Zinc Acetate; Zinc Arginate; Zinc Amino Acid Chelate; Zinc Ascorbate; Zinc Aspartate; Zinc Gluconate; Zinc Bis-Glycinate; Zinc Glycinate; Zinc Methionate; Zinc Oxide; Zinc Picolinate; Zinc Sulfate; and Zinc Yeast and mixtures thereof.

6. The method of claim 4, wherein the amino acid metal chelate is selected from the group consisting of copper bis-glycinate and zinc bis-glycinate.

Description

EXAMPLE

Example 1

[0018] Hydrogen sulfide emissions were measured from asphalt samples containing an amino acid metal chelate versus a control containing no amino acid metal chelate. Three asphalt samples were prepared and their hydrogen sulfide emissions measured after 1 hour in storage. To two samples, 0.5% amino acid metal chelate additive was added, CuGlyc (copper bis-glycinate) and ZnGlyc (zinc bis-glycinate) respectively. The hydrogen sulfide emissions were measured again after 5 minutes and 1 hour. Table 1 lists the results. The addition of the amino acid metal chelate showed significant reduction in hydrogen sulfide emissions.

TABLE-US-00002 TABLE 1 Hydrogen Sulfide Emission H.sub.2S (ppm) H.sub.2S (ppm) H.sub.2S (ppm) 5 minutes 1 hour after Storage at after adding 160, one addition of scavenger % Additive Temp hour scavenger material 0 Control 180 C. 16 10 0.5 CuGlyc 180 C. 12 4 1 0.5 ZnGlyc 180 C. 10 5 1

Example 2

[0019] Additional amino acid metal chelates that may be used in asphalt, or the preparation thereof, are listed in Table 2.

TABLE-US-00003 TABLE 2 Amino Acid Metal Chelates Metal Chelating agent Chromium Amino Acid Arginate Chloride Dinicotinate/Glycinate Picolinate Nicotinate TritChromium Yeast Copper Amino Acid Aspartate Carbonate Citrate Gluconate Sulfate Yeast Iron Amino Acid Aspartate Bis-Glycinate Citrate Fumarate Gluconate Sulfate Yeast Manganese Amino Acid Aspartate Carbonate Citrate Gluconate Sulfate Yeast Molybdenum Amino Acid TritMolybdenum Yeast Sodium Molybdate Selenium Amino Acid Aspartate L-Selenomethionine Yeast Sodium Selenate Sodium Selenite Strontium Aspartate Citrate Glycinate Vanadium Amino Acid Citrate Bis-Maltolato Oxo Vanadium Vanadyl Sulfate Sodium Metavanadate Zinc Acetate Arginate Amino Acid Ascorbate Aspartate Gluconate Glycinate Methionate Picolinate Sulfate Yeast