IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0660795
(2003-09-12)
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발명자
/ 주소 |
- Richardson, Hugh W.
- Zhao, Gang
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출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
24 인용 특허 :
15 |
초록
Process for producing a copper-containing aqueous solution, in which a copper mass is dissolved in the presence of an oxidant in an aqueous leach liquor containing monoethanolamine and (HMEA)2CO3. The leach liquor is produced by partially carbonating the monoethanolamine.
대표청구항
▼
1. A batch process for producing a copper-containing aqueous solution product comprising between 100 and 130 grams of dissolved copper per liter, said process comprising:providing to a batch reactor an initial aqueous leach liquor comprising water, monoethanolamine, and (HMEA)2CO3, wherein said (HME
1. A batch process for producing a copper-containing aqueous solution product comprising between 100 and 130 grams of dissolved copper per liter, said process comprising:providing to a batch reactor an initial aqueous leach liquor comprising water, monoethanolamine, and (HMEA)2CO3, wherein said (HMEA)2CO3 is produced by partially carbonating a composition comprising aqueous monoethanolamine; providing to the batch reactor a copper mass, wherein the molar ratio of copper in the copper mass to total monoethanolamine in the composition is greater than 1 to 3.5; providing to the batch reactor air, oxygen, or mixture thereof; and contacting the leach liquor with the air, oxygen, or mixture thereof and with the copper mass, thereby causing dissolution of a portion of the copper mass and forming the copper-containing aqueous solution product, wherein the temperature of the leach liquor is maintained at a temperature between 25° C. and 100° C., wherein the amount of dissolved copper in the copper-containing aqueous solution product is between 100 grams per liter and 130 grams per liter in 12 hours or less. 2. The process of claim 1, wherein the step of partially carbonating the monoethanolamine comprises contacting an aqueous monoethanolamine composition with carbon dioxide, wherein the initial aqueous leach liquor comprises between about 30% and about 40% by weight of total monoethanolamine and between about 8% and about 12% by weight of carbon dioxide.3. The process of claim 1, wherein the amount of dissolved copper in the copper-containing aqueous solution product is between 100 grams per liter and 130 grams per liter in 8 hours or less.4. The process of claim 1, wherein the temperature of the leach liquor is maintained at a temperature between 45° C. and 65° C., and wherein the amount of dissolved copper in the copper-containing aqueous solution product is between 100 grams per liter and 130 grams per liter in 8 to 12 hours.5. The process of claim 1, wherein the temperature of the leach liquor is maintained at a temperature between 40° C. and 80° C., and wherein the amount of dissolved copper in the copper-containing aqueous solution product is between 100 grams per liter and 130 grams per liter in 8 hours or less.6. The process of claim 2, wherein the temperature of the leach liquor is maintained at a temperature between 45° C. and 65° C., and wherein the amount of dissolved copper in the copper-containing aqueous solution product is between 100 grams per liter and 130 grams per liter in 8 hours or less.7. The process of claim 1, wherein the initial aqueous leach liquor further comprises at least 1.9 grams of dissolved copper per liter of initial aqueous leach liquor.8. The process of claim 1, wherein the initial aqueous leach liquor further comprises at least 13.7 grams of dissolved copper per liter of initial aqueous leach liquor.9. The process of claim 1, wherein the initial aqueous leach liquor further comprises between 1.9 grams and 13.7 grams of dissolved copper per liter of initial aqueous leach liquor.10. The process of claim 1, wherein the step of contacting the leach liquor with the copper mass comprises circulating the aqueous leach liquor through the batch reactor with a circulation pump, wherein the copper mass is a three dimensional open network that is immersed in the leach liquor and is permeable to the leach liquor.11. The process of claim 10, wherein said circulating comprises withdrawing aqueous leach liquor from the batch reactor at a location below the copper mass and reintroducing the withdrawn aqueous leach liquor at a location above the copper mass.12. The process of claim 10, wherein said circulating comprises withdrawing aqueous leach liquor at a rate of about 0.1 to 0.182 of the aqueous leach liquor volume per minute from the batch reactor at a location below the copper mass and reintroducing the withdrawn aqueous leach liquor at a location above the copper mass.13. The process of claim 1, wherein the step of contacting the leach liquor with the air, oxygen, or mixture thereof and with the copper mass comprises circulating the aqueous leach liquor through the batch reactor with a circulation pump, wherein the copper mass is a three dimensional open network that is immersed in the leach liquor and is permeable to the leach liquor, and sparging the air, oxygen, or mixture thereof upward through the copper mass and aqueous leach liquor.14. The process of claim 13, wherein said circulating comprises withdrawing aqueous leach liquor from the batch reactor at a location below the copper mass and reintroducing the withdrawn aqueous leach liquor at a location above the copper mass.15. The process of claim 13, wherein said circulating comprises withdrawing aqueous leach liquor at a rate of about 0.1 to 0.182 of the aqueous leach liquor volume per minute from the batch reactor at a location below the copper mass and reintroducing the withdrawn aqueous leach liquor at a location above the copper mass.16. The process of claim 1, wherein the temperature of the leach liquor is maintained at a temperature between 40° C. and 80° C.17. The process of claim 1, further comprising maintaining the pH of the aqueous leach liquor between about 8 and about 11.3 by adding monoethanolamine as a base and carbon dioxide as an acid.18. The process of claim 1, further comprising maintaining the pH of the aqueous leach liquor between about 9 and about 10.19. The process of claim 1, wherein the aqueous leach liquor is free of alkali metal hydroxides.20. The process of claim 1, wherein the aqueous leach liquor is free of polyamines and alcohols.21. The process of claim 1, wherein the aqueous leach liquor is free of carboxylic acids.22. The process of claim 1, wherein the aqueous leach liquor is free of ammonium hydroxide.23. The process of claim 1, wherein the molar ratio of copper to total monoethanolamine in the copper-containing aqueous solution product is less than 1 to 3.5.24. The process of claim 1, wherein the weight of the copper mass provided to the batch reactor is between 2/3 and 1 grams per ml of aqueous leach liquor provided to the batch reactor.25. The process of claim 1, wherein the step of contacting the leach liquor with the air, oxygen, or mixture thereof comprises immersing the copper mass in the aqueous leach liquor, wherein the copper mass is a three dimensional open network that is permeable to the leach liquor, and introducing the air, oxygen, or mixture thereof at a point below the top of the leach liquor such that the air, oxygen, or mixture thereof migrates upward through the aqueous leach liquor contacting the copper mass.26. The process of claim 1, wherein the temperature of the leach liquor is maintained at a temperature between 40° C. and 80° C.27. The process of claim 26, wherein the pH of the aqueous leach liquor is between about 8 and about 11.3.28. The process of claim 26, wherein air is provided to the batch reactor at a rate of between about 2 and about 20 standard cubic feet per hour per liter of the total volume of the leach liquor and the copper.29. The process of claim 1, wherein the batch reactor is an aerated packed tower containing the copper mass and the aqueous leach liquor, wherein the aqueous leach liquor is circulated from the bottom of the packed tower to the top of the packed tower.30. The process of claim 1, wherein the average rate of dissolution of copper mass is at least 17 grams of copper metal dissolved per liter of aqueous leach liquor per hour.31. The process of claim 1, wherein the batch reactor is adapted to be rotated while being aerated.32. The process of claim 1, wherein the weight of the copper mass provided to the batch reactor is between 2/3 and 1 grams per ml of aqueous leach liquor provided to the batch reactor, and wherein the copper mass comprises irregular shaped pieces having an average dimension of about 1 inch to about 3 inches.33. The process of claim 1, the copper mass comprises copper wire.34. The process of claim 1, the copper mass consists essentially of copper tubing, copper cabling, copper plates, copper wire, blister shot, or any mixture thereof.35. A continuous process for producing a copper-containing aqueous solution product, said process comprising:providing to a continuous reactor in the form of a tower substantially packed with copper mass; providing an aqueous leach liquor comprising water, a first concentration of dissolved copper, monoethanolamine, and (HMEA)2CO3, wherein said (HMEA)2CO3 is produced by contacting aqueous monoethanolamine with carbon dioxide, and wherein the temperature of the aqueous leach liquor is maintained at a temperature between 25° C. and 100° C.; providing to the continuous reactor air, oxygen, or mixture thereof, and contacting the leach liquor with the air, oxygen, or mixture thereof and with the copper mass, thereby causing dissolution of a portion of the copper mass and forming the copper-containing aqueous solution product comprising a second concentration of dissolved copper, wherein the second concentration is higher than the first concentration and is between 100 and 130 grams of dissolved copper per liter, and wherein the copper dissolution rate is between about 3.65 and about 9.27 grams of copper mass dissolved per liter of aqueous leach liquor per hour. 36. The process of claim 35, wherein the step of partially carbonating the monoethanolamine comprises contacting an aqueous monoethanolamine composition with carbon dioxide, and wherein the aqueous leach liquor comprises between about 30% and about 40% by weight of total monoethanolamine and between about 5% and about 30% by weight of carbon dioxide.37. The process of claim 35, wherein the temperature of the leach liquor is maintained at a temperature between 40° C. and 80° C.38. The process of claim 35, wherein the temperature of the leach liquor is maintained at a temperature between 45° C. and 65° C.39. The process of claim 35, wherein the step of providing an aqueous leach liquor comprising water, a first concentration of dissolved copper, monoethanolamine, and (HMEA)2CO3 comprises:providing a first portion of copper-containing aqueous solution product previously produced, admixing with the first portion a second portion of aqueous monoethanolamine, and adding carbon dioxide to maintain the pH of the resultant aqueous leach liquor comprising the first concentration of dissolved copper at a value between 8 and 11.3. 40. The process of claim 39, wherein the temperature of the leach liquor is maintained at a temperature between 40° C. and 80° C.41. The process of claim 39, wherein the temperature of the leach liquor is maintained at a temperature between 45° C. and 65° C.42. The process of claim 39, wherein the pH of the aqueous leach liquor is maintained between about 9 and about 10.43. The process of claim 35, wherein the weight of the copper mass is between 2/3 and 1 grams per ml of aqueous leach liquor.44. The process of claim 35, wherein the step of contacting the leach liquor with the air, oxygen, or mixture thereof comprises immersing the copper mass in the aqueous leach liquor, wherein the copper mass is a three dimensional open network that is permeable to the leach liquor, and introducing the air, oxygen, or mixture thereof at a point below the top of the leach liquor such that the air, oxygen, or mixture thereof migrates upward through the aqueous leach liquor contacting the copper mass.45. The process of claim 44, wherein air is provided to the continuous reactor at a rate of between about 2 and about 20 standard cubic feet per hour per liter of the total volume of the leach liquor and the copper.46. The process of claim 44, wherein the continuous reactor is an aerated packed tower containing the copper mass and the aqueous leach liquor, wherein the aqueous leach liquor is circulated from the bottom of the packed tower to the top of the packed tower.47. The process of claim 35, wherein the continuous reactor is adapted to be rotated while being aerated.48. The process of claim 35, wherein the weight of the copper mass provided to the continuous reactor is between 2/3 and 1 grams per ml of aqueous leach liquor provided to the continuous reactor, and wherein the copper mass comprises irregular shaped pieces having an average dimension of about 1 inch to about 3 inches.49. The process of claim 35, the copper mass comprises copper wire.50. The process of claim 35, the copper mass consists essentially of copper tubing, copper cabling, copper plates, copper wire, blister shot, or any mixture thereof.51. The process of claim 35, wherein the step of contacting the leach liquor with the copper mass comprises circulating the aqueous leach liquor through the continuous reactor with a circulation pump, wherein the copper mass is a three dimensional open network that is immersed in the leach liquor and is permeable to the leach liquor.52. The process of claim 51, wherein said circulating comprises withdrawing aqueous leach liquor from the batch reactor at a location below the copper mass and reintroducing the withdrawn aqueous leach liquor at a location above the copper mass.53. The process of claim 51, wherein said circulating comprises withdrawing aqueous leach liquor at a rate of about 0.1 to 0.325 of the aqueous leach liquor volume per minute from the continuous reactor at a location below the copper mass and reintroducing the withdrawn aqueous leach liquor at a location above the copper mass.54. The process of claim 35, wherein the step of contacting the leach liquor with the air, oxygen, or mixture thereof and with the copper mass comprises circulating the aqueous leach liquor through the batch reactor with a circulation pump, wherein the copper mass is a three dimensional open network that is immersed in the leach liquor and is permeable to the leach liquor, and sparging the air, oxygen, or mixture thereof upward through the copper mass and aqueous leach liquor.55. A process for producing a copper-containing aqueous solution product, said process comprising:providing to a reactor an initial aqueous leach liquor comprising water, monoethanolamine, and (HMEA)2CO3, wherein said (HMEA)2CO3 is produced by partially carbonating aqueous monoethanolamine; providing to the reactor a copper mass, wherein the weight of the copper mass provided to the batch reactor is between 2/3 and 1 grams per ml of aqueous leach liquor provided to the reactor; providing to the reactor air, oxygen, or mixture thereof and contacting the leach liquor with the air, oxygen, or mixture thereof and with the copper mass, thereby causing dissolution of a portion of the copper mass and forming the copper-containing aqueous solution product, wherein the temperature of the leach liquor is maintained at a temperature between 40° C. and 80° C., wherein the amount of dissolved copper in the copper-containing aqueous solution product is between 100 grains per liter and 130 grams per liter in 12 hours or less. 56. The process of claim 55, wherein the step of contacting the leach liquor with the copper mass comprises circulating the aqueous leach liquor by withdrawing aqueous leach liquor from the reactor at a location below the copper mass and reintroducing the withdrawn aqueous leach liquor at a location above the copper mass, wherein the copper mass is a three dimensional open network that is immersed in the leach liquor and is permeable to the leach liquor, and providing the air, oxygen, or mixture thereof at a location below the copper mass.57. A process for producing a copper-containing aqueous solution product, said process comprising:providing to a reactor an initial aqueous leach liquor comprising water, monoethanolamine, and (HMEA)2CO3, wherein said (HMEA)2CO3 is produced by partially carbonating aqueous monoethanolamine; providing to the reactor a copper mass, wherein the copper mass is a three dimensional open network that is immersed in the leach liquor and is permeable to the leach liquor, and wherein the amount of copper mass is such that the height of the copper mass is substantially the same as the height of the top surface of the aqueous leach liquor; providing to the batch reactor air, oxygen, or mixture thereof and contacting the leach liquor with the air, oxygen, or mixture thereof and with the copper mass, thereby causing dissolution of a portion of the copper mass and forming the copper-containing aqueous solution product, wherein the temperature of the leach liquor is maintained at a temperature between 40° C. and 80° C., wherein the average dissolution rate of copper is at least 17 grams per hour per liter of aqueous leach liquor. 58. The process of claim 57, wherein the step of contacting the leach liquor with the copper mass comprises circulating the aqueous leach liquor by withdrawing aqueous leach liquor from the reactor at a location below the copper mass and reintroducing the withdrawn aqueous leach liquor at a location above the copper mass, wherein the copper mass is a three dimensional open network that is immersed in the leach liquor and is permeable to the leach liquor, and providing the air, oxygen, or mixture thereof at a location below the copper mass.
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