초록

Acid gas is liquified by compression and cooling, mixed with water under pressure and flowed into a disposal well.

대표청구항 ▼

I claim as my invention: 1. The method of disposing of acid gas removed from hydrocarbon products comprising the steps of: a) compressing the acid gas to a pressure wherein the acid gas will form a dense fluid, b) forming a dense fluid by cooling the compressed acid gas, c) mixing the acid gas as

I claim as my invention: 1. The method of disposing of acid gas removed from hydrocarbon products comprising the steps of: a) compressing the acid gas to a pressure wherein the acid gas will form a dense fluid, b) forming a dense fluid by cooling the compressed acid gas, c) mixing the acid gas as a dense fluid with sufficient water to form a stable mixture at injection pressure, and d) injecting said stable mixture at injection pressure into a disposal well. 2. The method as defined in claim 1 wherein said compression pressure is at least 650 psi. 3. The method as defined in claim 1 wherein said water is alkaline id="DEL-S-00001" date="20060425" and has a pH of at least 7.5id="DEL-S-00001" . 4. The method as defined in claim 1 wherein a minimum pressure of step id="DEL-S-00002" date="20060425" a) id="DEL-S-00002" id="INS-S-00002" date="20060425" c) id="INS-S-00002" is Pmix = 284+21.55횞CO2% wherein Pmix is said minimum pressure in psi and CO2% is the percentage of carbon dioxide in the acid gas. 5. The method as defined in claim 4 wherein the compressed acid gas is cooled to a temperature of below 130째 F. 6. The method as defined in claim 1 wherein sufficient water is a minimum of description="In-line Formulae" end="lead"RH 2O=0.25+0.10345횞CO2% description="In-line Formulae" end="tail" wherein RH2O is the minimum ratio by volume of water having at least a pH of 7.5 to the dense fluid acid gas. 7. The method as defined in claim 6 wherein the mixed acid gas and water has a temperature of below 110째 F. 8. The method as defined in claim 1 further comprising: e) mixing the acid gas and water in a confluent line, and f) maintaining the pressure in the confluent line to the compression pressure by g) limiting the flow from the confluent line by a pressure control valve. 9. The method as defined in claim 8 wherein h) determining that the mixture found is stable by less than a significant amount of any component of the acid gas flashing into the gas phase down stream from the control valve. 10. The method as defined in claim 9 wherein determining that the amount of any component of acid gas flashed is more than a significant amount by formation of hydrates adhering on surfaces of the disposal well. 11. The method as defined in claim 9 wherein determining that the amount of any component of acid gas flashed is more than a significant amount by formation of gas pockets down stream of the control valve as determined by rapid increase of pressure down stream of the control valve. 12. The method as defined in claim 9 wherein less than a significant amount of any component of acid gas is flashed is determined when less the 5 percent of said mixture is flashed. 13. The method as defined in claim 9 wherein less than a significant amount of any component of acid gas is flashed is determined by process simulation. 14. The method as defined in clam 9 wherein less than a significant amount of any component of acid gas is flashed is determined by manual process calculations. id="INS-S-00003" date="20060425" 15. The method according to claim 1 wherein sufficient water is an amount of water such that no more than about 5% of the mixed acid gas as a dense fluid and water vaporizes during said injecting step. id="INS-S-00003" id="INS-S-00004" date="20060425" 16. The method of claim 1 wherein the compressed acid gas is cooled to a temperature between its freezing point and about 130째 F. id="INS-S-00004" id="INS-S-00005" date="20060425" 17. The method of claim 1 wherein the mixed acid gas and water has a temperature between its freezing point and about 110째 F. id="INS-S-00005" id="INS-S-00006" date="20060425" 18. A method of disposing of an acid gas comprising the steps of: forming a dense fluid of an acid gas; mixing the dense fluid acid gas with water to form a stable mixture of acid gas and water having a ratio of water to acid gas of about id="INS-S-00006" description="In-line Formulae" end="lead"R H2O=0.25+0.10345횞CO2% description="In-line Formulae" end="tail" wherein RH2O is the volume of water to one volume of acid gas and CO2% is the percentage of CO 2 on a mole basis in the acid gas; and injecting the mixture under pressure into a disposal well. id="INS-S-00007" date="20060425" 19. The method according to claim 18 wherein water in an amount less than about twice the ratio RH2O=0.25+0.10345 횞CO2% is mixed with acid gas. id="INS-S-00007" id="INS-S-00008" date="20060425" 20. The method according to claim 18 wherein water in an amount less than about three times the ratio RH2O=0.25+0. 10345횞CO2% is mixed with acid gas. id="INS-S-00008" id="INS-S-00009" date="20060425" 21. The method according to claim 18 wherein the pressure in said injecting step is at least about Pmix=284+21.55횞CO 2% and wherein Pmix is the pressure in psi and CO2% is the percentage of carbon dioxide on a mole basis in the acid gas. id="INS-S-00009" id="INS-S-00010" date="20060425" 22. The method according to claim 18 wherein the pressure in said injecting step is sufficient to prevent more than about 5% of the mixture from flashing. id="INS-S-00010" id="INS-S-00011" date="20060425" 23. The method according to claim 18 wherein the dense fluid acid gas is formed by compressing and cooling an acid gas. id="INS-S-00011" id="INS-S-00012" date="20060425" 24. The method according to claim 23 wherein the acid gas is compressed to pressure of at least about 650 psi. id="INS-S-00012" id="INS-S-00013" date="20060425" 25. The method according to claim 24 wherein the compressed acid gas is cooled to a temperature between its freezing point and about 130째 F. id="INS-S-00013" id="INS-S-00014" date="20060425" 26. A method of disposing of an acid gas comprising the steps of: mixing an acid gas with water to form a stable mixture that is substantially not a solution of absorbed acid gas in water; injecting the mixture under pressure into a disposal well. id="INS-S-00014" id="INS-S-00015" date="20060425" 27. The method according to claim 26 wherein the acid gas is a dense fluid. id="INS-S-00015" id="INS-S-00016" date="20060425" 28. The method according to claim 27 wherein the pressure in said injecting step is at least about Pmix=284+21.55횞CO 2% and wherein Pmix is the pressure in psi and CO2% is the percentage of carbon dioxide on a mole basis in the acid gas. id="INS-S-00016" id="INS-S-00017" date="20060425" 29. The method according to claim 27 wherein the pressure in said injecting step is sufficient to prevent more than about 5% of the mixture from flashing. id="INS-S-00017" id="INS-S-00018" date="20060425" 30. The method according to claim 27 wherein water in an amount less than about three times a ratio of RH2O=0.25+0. 10345횞CO2%, wherein RH2O is the volume of water to one volume of dense fluid acid gas and CO2 % is the percentage of CO2 on a mole basis in the acid gas, is mixed with acid gas. id="INS-S-00018" id="INS-S-00019" date="20060425" 31. A method of disposing of an acid gas comprising the steps of: forming a dense fluid of an acid gas; mixing the dense fluid acid gas with an amount of water to form a stable mixture of acid gas and water; and injecting the mixture under pressure into a disposal well. id="INS-S-00019" id="INS-S-00020" date="20060425" 32. The method according to claim 31 wherein the pressure in said injecting step is sufficient to prevent more than about 5% of the mixture from flashing. id="INS-S-00020" id="INS-S-00021" date="20060425" 33. The method according to claim 31 wherein water in a volume amount of less than about eleven times the volume of acid gas is mixed. id="INS-S-00021" id="INS-S-00022" date="20060425" 34. The method according to claim 31 wherein water in a volume amount of less than about thirty-three times the volume of acid gas is mixed. id="INS-S-00022" id="INS-S-00023" date="20060425" 35. The method according to claim 31 wherein water in an amount sufficient to prevent the formation of hydrates in the disposal well is mixed with acid gas. id="INS-S-00023" id="INS-S-00024" date="20060425" 36. The method according to claim 35 wherein the formation of hydrates is determined by an increase in injection pressure of about 5- 10 psi per hour. id="INS-S-00024" id="INS-S-00025" date="20060425" 37. A method of disposing of a dense fluid acid gas comprising the steps of: mixing the dense fluid acid gas with water to form a stable mixture; and injecting the mixture under pressure into a disposal well such that less than about 5% of the mixture vaporizes during injection. id="INS-S-00025" id="INS-S-00026" date="20060425" 38. The method of disposing of acid gas removed from hydrocarbon products comprising the steps of: a. compressing the acid gas to a pressure wherein the acid gas will form a dense fluid, b. forming a dense fluid by cooling the compressed acid gas, c. mixing the acid gas as a dense fluid with sufficient liquid water to form a stable mixture at injection pressure, and d. injecting said stable mixture at injection pressure into a disposal well. id="INS-S-00026"