CN102921270A - Method for oil gas or volatile gas desorption of adsorbent applied to oil gas recovery - Google Patents
Method for oil gas or volatile gas desorption of adsorbent applied to oil gas recovery Download PDFInfo
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- CN102921270A CN102921270A CN2012104284304A CN201210428430A CN102921270A CN 102921270 A CN102921270 A CN 102921270A CN 2012104284304 A CN2012104284304 A CN 2012104284304A CN 201210428430 A CN201210428430 A CN 201210428430A CN 102921270 A CN102921270 A CN 102921270A
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Abstract
The invention discloses a method for oil gas or volatile gas desorption of an adsorbent applied to oil gas or volatile gas recovery. The method comprises the following steps of: connecting an adsorbent tank filled with the adsorbent which adsorbs oil gas or volatile gas before with a vacuum unit, closing an air inlet valve at the bottom of the adsorbent tank, and closing an exhaust valve and a back-flushing valve which are positioned on the top of the adsorbent tank; and carrying out vacuum desorption on the adsorbent tank by the vacuum unit, thereby implementing the desorption process of the adsorbent. The method disclosed by the invention achieves the purposes of improving the desorption efficiency of the oil gas and increasing the desorption amount of oil gas in next recycle by regulating the opening of the back-flushing control valve on the top of the oil gas recovery adsorbent tank.
Description
Technical field
The invention belongs to the petrochemical technology field, particularly the recovery of a kind of oil gas or the escaping gas method of adsorbent desorption oil gas or escaping gas.
Background technology
Light-end products are in accumulating, transmitting-receiving process, can give off a large amount of oil gas or VOC (VOCs), therefore, the recovery of these escaping gases is become the necessary means of reduction environmental pollution, potential safety hazard, also become the economic benefit growth point of relevant petroleum and petrochemical sector.At present, the way of recycling of being used widely and having obtained good result generally adopts adsorption method to carry out Oil-gas Separation, reclaim in conjunction with other techniques such as absorption, condensations, be the direction that the scientific research personnel makes great efforts to the research of absorbing process and new adsorbent therefore always again.
Because the adsorption capacity of adsorbent is limited, therefore the adsorbent in the oil gas absorbing recovery device needs frequent desorption and regeneration just can recycle, at present adopt vacuum desorptions or vacuum to be aided with the means such as hot gas purging to carry out the oil gas desorb more, it is generally acknowledged that the lower desorption effect of vacuum is better in desorption process, but therefore the corresponding relation that does not have quantitative is difficult to accomplish improve efficiently oil gas solution adsorption desorption efficient and improves the oil gas adsorbance.
The present invention reclaims with blowback valve opening in the adsorption tower by changing oil gas, changes backflowing gas amount and desorption vacuum, reaches the purpose that improves oil gas desorption efficient and improve the oil gas adsorbance.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of raising oil gas or escaping gas (such as benzene vapour, carrene) to reclaim method with adsorbent adsorbance and oil gas, escaping gas adsorption desorption efficient, the method was by adjusting the blowback by-pass valve control aperture of oil gas or escaping gas absorption tank deck, reached the purpose that improves oil gas or escaping gas desorption efficient and improve next recycle oil gas adsorbance.
For solving the problems of the technologies described above, the method for adsorbent desorption oil gas or escaping gas is used in the recovery that the invention provides a kind of oil gas or escaping gas, and it comprises:
The first step is connected with the vacuum unit the adsorbent tank that adsorbed the adsorbent behind oil gas or the escaping gas is housed, and adsorbent pot bottom intake valve cuts out adsorbent tank top exhaust-valve and blowback valve closing;
Second step adopts the vacuum unit that the adsorbent tank is carried out vacuum desorption, thereby realizes the desorption process of adsorbent.
Wherein, described second step is specially the vacuum-pump power supply of opening the vacuum unit and begins to carry out the vacuum desorption process, vacuum reaches 0.095 ~ 0.098MPa scope, the blowback valve opening at control adsorption tanks top, make the blowback air inflow keep certain numerical value, when the weight of adsorbent remains unchanged substantially, thinking to need the oil gas of desorption or escaping gas substantially all to remove out, thereby realize the desorption process of adsorbent.
The present invention also provides the adsorption method of a kind of oil gas or escaping gas, and it comprises:
The 1st step, the absorption of oil gas or escaping gas;
The 2nd step, the Passivation Treatment of adsorbent;
The 3rd step, the recovery of above-mentioned oil gas or the escaping gas method of adsorbent desorption oil gas or escaping gas;
In the 4th step, the adsorbent behind the desorption adsorbs again;
The 5th step repeated the 3rd step and the 4th to go on foot, and stopped when the each adsorbance of adsorbent and desorption rate remain unchanged, and finished whole process.
Wherein, described the 1st step further is specially the adsorption tanks that will adsorbent be housed and is connected with oil gas generator or escaping gas generating means, makes adsorbent absorption oil gas or volatile gas.
Wherein, described the 2nd step further is specially in absorption oil gas or volatile gas process, tank exit concentration upon adsorption reach with entrance concentration near the time, with all entrance and exit valve closings on the adsorption tanks one day, make adsorbent fully adsorb oil gas or escaping gas.
Wherein, described the 4th step further is specially and the adsorbent tank behind the desorption is reconnected oil gas generator adsorbs, and when tank outlet NMHC concentration upon adsorption reaches certain value, stops absorption.
The present invention also provides the adsorption method of a kind of oil gas or escaping gas, and it comprises:
The 1st step was connected the adsorption tanks that adsorbent is housed with oil gas generator or escaping gas generating means, make adsorbent absorption oil gas or volatile gas;
The 2nd step, in absorption oil gas or volatile gas process, tank exit concentration upon adsorption reach with entrance concentration near the time, with all entrance and exit valve closings on the adsorption tanks one day, make adsorbent fully adsorb oil gas or escaping gas, by the adsorbent weight behind weigh absorption oil gas or the escaping gas, calculate oil gas or the escaping gas adsorbance of adsorbent;
The 3rd step was connected the adsorbent tank of finishing after the absorption with the vacuum unit, adsorbent pot bottom intake valve cuts out adsorbent tank top exhaust-valve and blowback valve closing;
The 4th step, the vacuum-pump power supply of opening the vacuum unit begins to carry out the vacuum desorption process, vacuum reaches 0.095 ~ 0.098MPa scope, the blowback valve opening at control adsorption tanks top, make the blowback air inflow keep certain numerical value, when the weight of adsorbent remains unchanged substantially, think oil gas or escaping gas that can desorption under this condition be substantially all removed out, thereby realize the desorption process of adsorbent, the weight of adsorbent behind weight by adsorbent before the desorption of weighing and the desorption is calculated desorption rate and the desorption efficient of adsorbent;
The 5th step, adsorbent tank behind the desorption is reconnected oil gas generator to be adsorbed, when tank outlet NMHC concentration upon adsorption reaches certain value, stop absorption, by the adsorbent weight behind weigh absorption oil gas or the escaping gas, calculate oil gas or the escaping gas adsorbance of adsorbent;
The 6th step repeated for the 3rd step to the 5th step, stopped when the each adsorbance of adsorbent and desorption rate remain unchanged, and finished whole process.
The present invention also provides recovery adsorbent desorption oil gas or the method for escaping gas or the application of adsorption method in petrochemical industry safety in production process of above-mentioned oil gas or escaping gas of above-mentioned oil gas or escaping gas.
The technique effect that the present invention is useful is:
The blowback by-pass valve control aperture of absorption tank deck is reclaimed in the recovery of oil gas provided by the present invention or escaping gas by adjusting oil gas with the method for adsorbent desorption oil gas or escaping gas, reach the purpose that improves oil gas or escaping gas desorption efficient and improve next circulation oil gas or escaping gas adsorbance, adopt this method can make oil gas or escaping gas desorption efficient reach 100%, can make at most oil gas or escaping gas adsorbance reach now methodical 200%.
The specific embodiment
The method of adsorbent desorption oil gas or escaping gas is used in the recovery that the invention provides a kind of oil gas or escaping gas, and it comprises:
The first step is connected with the vacuum unit the adsorbent tank that adsorbed the adsorbent behind oil gas or the escaping gas is housed, and adsorbent pot bottom intake valve cuts out adsorbent tank top exhaust-valve and blowback valve closing;
Second step adopts the vacuum unit that the adsorbent tank is carried out vacuum desorption, thereby realizes the desorption process of adsorbent.
The adsorbent that adds in the described first step can be active carbon, dewatering silica gel, polymeric adsorbent etc.
Described second step is specially the vacuum-pump power supply of opening the vacuum unit and begins to carry out the vacuum desorption process, vacuum reaches 0.095 ~ 0.098MPa scope, the blowback valve opening at control adsorption tanks top, make the blowback air inflow keep certain numerical value, when the weight of adsorbent remains unchanged substantially, oil gas or escaping gas that can desorption under this condition substantially all remove out, thereby realize the desorption process of adsorbent.
Blowback air inflow in the described second step is between 0 ~ 150L/min, further preferably between 1.5L/min ~ 15L/min, the principle that the blowback air inflow affects desorption rate and desorption efficient is because in the process of vacuum desorption, under the certain vacuum degree, the gas that blowback enters has further reduced the dividing potential drop of adsorbate, make adsorbate be more prone to that desorption is out from adsorbent because of purging, if the blowback air inflow, reduces the limited in one's ability to improving the desorption DeGrain of dividing potential drop less than 1.5L/min; If the blowback air inflow greater than 15L/min, can cause vacuum too small, be unfavorable on the contrary desorption.
In the described second step, the weight of adsorbent behind the weight by adsorbent before the desorption of weighing and the desorption is calculated desorption rate and the desorption efficient of adsorbent.
The present invention also provides the adsorption method of a kind of oil gas or escaping gas, and it comprises:
The 1st step, the absorption of oil gas or escaping gas;
The 2nd step, the Passivation Treatment of adsorbent;
The 3rd step, the recovery of above-mentioned oil gas or the escaping gas method of adsorbent desorption oil gas or escaping gas;
In the 4th step, the adsorbent behind the desorption adsorbs again;
The 5th step repeated the 3rd step and the 4th to go on foot, and stopped when the each adsorbance of adsorbent and desorption rate remain unchanged, and finished whole process.
In described the 5th step, can be again the weight of adsorbent behind weight by adsorbent before the desorption of weighing and the desorption, again calculate desorption rate and the desorption efficient of adsorbent.
Described the 1st step further is specially the adsorption tanks that will adsorbent be housed and is connected with oil gas generator or escaping gas generating means, makes adsorbent absorption oil gas or volatile gas.
Described the 2nd step further is specially in absorption oil gas or volatile gas process, tank exit concentration upon adsorption reach with entrance concentration near the time, with all entrance and exit valve closings on the adsorption tanks one day, make adsorbent fully adsorb oil gas or escaping gas.
In described the 2nd step, by the adsorbent weight behind weigh absorption oil gas or the escaping gas, calculate oil gas or the escaping gas adsorbance of adsorbent.
Described the 4th step further is specially and the adsorbent tank behind the desorption is reconnected oil gas generator adsorbs, and when tank outlet NMHC concentration upon adsorption reaches certain value, stops absorption.
In described the 4th step, by the adsorbent weight behind weigh absorption oil gas or the escaping gas, calculate oil gas or the escaping gas adsorbance of adsorbent.
In described the 4th step, preferred NMHC concentration reaches 25g/m
3In time, stop to adsorb.
The present invention also provides the adsorption method of a kind of oil gas or escaping gas, and it comprises:
The 1st step was connected the adsorption tanks that adsorbent is housed with oil gas generator or escaping gas generating means, make adsorbent absorption oil gas or volatile gas;
The 2nd step, in absorption oil gas or volatile gas process, tank exit concentration upon adsorption reach with entrance concentration near the time, with all entrance and exit valve closings on the adsorption tanks one day, make adsorbent fully adsorb oil gas or escaping gas, by the adsorbent weight behind weigh absorption oil gas or the escaping gas, calculate oil gas or the escaping gas adsorbance of adsorbent;
The 3rd step was connected the adsorbent tank of finishing after the absorption with the vacuum unit, adsorbent pot bottom oil-feed air valve is closed adsorbent tank top exhaust-valve and blowback valve;
The 4th step, the vacuum-pump power supply of opening the vacuum unit begins to carry out the vacuum desorption process, vacuum reaches 0.095 ~ 0.098MPa scope, the blowback valve opening at control adsorption tanks top, make the blowback air inflow keep certain numerical value, when the weight of adsorbent remains unchanged substantially, think oil gas or escaping gas that can desorption under this condition be substantially all removed out, thereby realize the desorption process of adsorbent, the weight of adsorbent behind weight by adsorbent before the desorption of weighing and the desorption is calculated desorption rate and the desorption efficient of adsorbent;
The 5th step, adsorbent tank behind the desorption is reconnected oil gas generator to be adsorbed, when tank outlet NMHC concentration upon adsorption reaches certain value, stop absorption, by the adsorbent weight behind weigh absorption oil gas or the escaping gas, calculate oil gas or the escaping gas adsorbance of adsorbent;
The 6th step repeated for the 3rd step to the 5th step, stopped when the each adsorbance of adsorbent and desorption rate remain unchanged, and finished whole process.
In described the 4th step, the blowback air inflow is between 1 ~ 150L/min, further preferably between 1.5L/min ~ 15L/min, the principle that the blowback air inflow affects desorption rate and desorption efficient is because in the process of vacuum desorption, under the certain vacuum degree, the gas that blowback enters has further reduced the dividing potential drop of adsorbate, make adsorbate be more prone to that desorption is out from adsorbent because of purging, if the blowback air inflow, reduces the limited in one's ability to improving the desorption DeGrain of dividing potential drop less than 1.5L/min; If the blowback air inflow greater than 15L/min, can cause vacuum too small, be unfavorable on the contrary desorption.。
In described the 5th step, preferred NMHC concentration reaches 25g/m
3In time, stop to adsorb.
The present invention also provides recovery adsorbent desorption oil gas or the method for escaping gas or the application of adsorption method in petrochemical industry safety in production process of above-mentioned oil gas or escaping gas of above-mentioned oil gas or escaping gas.
Said method of the present invention not only can be applied to improve performance of the adsorbent in the recovery of oil gas or escaping gas, and also has certain application prospect in the pressure swing adsorption technique that gas separates.
Describe embodiments of the present invention in detail below with reference to embodiment, how the application technology means solve technical problem to the present invention whereby, and the implementation procedure of reaching technique effect can fully understand and implements according to this.
Embodiment 1
The adsorption tanks that the column-shaped active carbon adsorbent is housed are connected with oil gas generator or escaping gas generating means, the oil gas that adsorbent absorption 93# gasoline is produced, in absorption oil gas process, tank exit concentration upon adsorption reach with entrance concentration near the time, with all entrance and exit valve closings on the adsorption tanks one day, make adsorbent fully adsorb oil gas, the adsorbent weightening finish (is equipped with the weight of adsorption tanks before and after absorption of adsorbent for 70g by weighing after this processing, the difference of the two is exactly the gain in weight of adsorbent), the adsorbent tank of finishing after the absorption is connected with the vacuum unit, adsorbent pot bottom oil-feed air valve is closed, adsorbent tank top exhaust-valve and blowback valve, the vacuum-pump power supply of opening the vacuum unit begins to carry out the vacuum desorption process, vacuum is 0.098MPa, the blowback valve opening at control adsorption tanks top, making the blowback air inflow is 7.5L, vacuum desorption 1 hour, when the weight of adsorbent remains unchanged substantially, think oil gas that can desorption under this condition is substantially all removed out, thereby realize the desorption process of adsorbent, when desorption when approximately adsorbent weight is constant after 1 hour, desorption rate is 12.07g, desorption efficient is 17.36%, adsorbent tank behind the desorption is reconnected oil gas generator adsorb, tank outlet NMHC concentration upon adsorption reaches 25g/m
3The time, stop absorption, weighing and obtaining the absorption weightening finish is 11.13g, the adsorbent tank of finishing after the absorption is connected with the vacuum unit again, adsorbent pot bottom oil-feed air valve is closed, adsorbent tank top exhaust-valve and blowback valve, the vacuum-pump power supply of opening the vacuum unit begins to carry out the vacuum desorption process, vacuum is 0.098MPa, the blowback valve opening at control adsorption tanks top, and making the blowback air inflow is 4.5L, behind the vacuum desorption 15 minutes, the weight of adsorbent remains unchanged substantially, and thinking to need the oil gas of desorption substantially all to remove out, thereby realizes the whole desorption process of adsorbent, the desorption loss of weight amount that obtains adsorbent of weighing is 11.20g, desorption efficient is 100.63%, and the adsorbance that the repetition adsorption step obtains adsorbent is 12.30g, and adsorbance has increased by 10.51%.
Embodiment 2
The Passivation Treatment of the present embodiment is with desorption process is identical with embodiment 1 for the first time, just in second time during vacuum desorption, maintenance vacuum is 0.085MPa, the blowback air inflow is 15L, behind the vacuum desorption 15 minutes, the desorption loss of weight amount that obtains adsorbent is 13.16g, and desorption efficient is 118.24%, the adsorbance that obtains adsorbent after again adsorbing is 18.76g, and adsorbance has increased by 42.5%.
Embodiment 3
Adopt the Type B spherical silica gel of Haiyang Chemical Plant, Qingdao, use methylchlorosilane to carry out the silanization hydrophobically modified at stirring reaction, the mass ratio of the addition of described methylchlorosilane and Type B spherical silica gel is 1:20, the stirring reaction time is 3h, reaction temperature is 30 ℃, and obtaining the aperture is the dewatering silica gel sample of 5nm.
The present embodiment selects this mesoporous adsorption material as adsorbent, and carry out corresponding Passivation Treatment and oil gas adsorption and desorption process according to the step of embodiment 1, the adsorbance that finally obtains after the Passivation Treatment is 53.59g, desorption rate 17.26g when desorption is constant to adsorbent weight, desorption efficient is 32.21%.Oil gas adsorbance after adsorbing is 13.49g, and the vacuum during desorption is 0.025MPa again, and the blowback air inflow is 75L, and vacuum desorption is after 15 minutes, and obtaining desorption loss of weight amount is 16.78g, and desorption efficient is 124.46%.The adsorbance that obtains adsorbent behind the repetition adsorption step is 27.63g, and adsorbance has increased by 104.82%.
Comparative example
Adsorbent and the operating procedure of this comparative example are substantially the same manner as Example 1, just the backflowing gas amount in second time desorption is used 1.5L commonly used, be 95.3% through weighing, calculate desorption efficient, primary adsorbance is 11.13, adsorbance is 10.09g for the second time, and adsorbance has reduced 9.34%.
This intellectual property of primary enforcement that all are above-mentioned is not set restriction this new product of other forms of enforcement and/or new method.Those skilled in the art will utilize this important information, and foregoing is revised, to realize similar implementation status.But all modifications or transformation belong to the right of reservation based on new product of the present invention.
The above only is preferred embodiment of the present invention, is not to be the restriction of the present invention being made other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment does, still belongs to the protection domain of technical solution of the present invention according to technical spirit of the present invention.
Claims (9)
1. the recovery of an oil gas or escaping gas is characterized in that with the method for adsorbent desorption oil gas or escaping gas, comprising:
The first step is connected with the vacuum unit the adsorbent tank that adsorbed the adsorbent behind oil gas or the escaping gas is housed, and adsorbent pot bottom intake valve cuts out adsorbent tank top exhaust-valve and blowback valve closing;
Second step adopts the vacuum unit that the adsorbent tank is carried out vacuum desorption, thereby realizes the desorption process of adsorbent.
2. the method for claim 1, it is characterized in that: described second step is specially the vacuum-pump power supply of opening the vacuum unit and begins to carry out the vacuum desorption process, vacuum reaches 0.095 ~ 0.098MPa scope, the blowback valve opening at control adsorption tanks top, make the blowback air inflow keep certain numerical value, when the weight of adsorbent remains unchanged substantially, thinking to need the oil gas of desorption or escaping gas substantially all to remove out, thereby realize the desorption process of adsorbent.
3. the adsorption method of an oil gas or escaping gas is characterized in that, comprising:
The 1st step, the absorption of oil gas or escaping gas;
The 2nd step, the Passivation Treatment of adsorbent;
The 3rd step, the recovery of above-mentioned oil gas or the escaping gas method of adsorbent desorption oil gas or escaping gas;
In the 4th step, the adsorbent behind the desorption adsorbs again;
The 5th step repeated for the 3rd step, stopped when the each adsorbance of adsorbent and desorption rate remain unchanged, and finished whole process.
4. adsorption method as claimed in claim 3 is characterized in that: described the 1st step further is specially the adsorption tanks that will adsorbent be housed and is connected with oil gas generator or escaping gas generating means, makes adsorbent adsorb oil gas or volatile gas.
5. such as claim 3 or 4 described adsorption methods, it is characterized in that: described the 2nd step further is specially in absorption oil gas or volatile gas process, tank exit concentration upon adsorption reach with entrance concentration near the time, with all entrance and exit valve closings on the adsorption tanks one day, make adsorbent fully adsorb oil gas or escaping gas.
6. such as the described adsorption method of claim 3 to 5, it is characterized in that: described the 4th step further is specially and the adsorbent tank behind the desorption is reconnected oil gas generator adsorbs, when tank outlet NMHC concentration upon adsorption reaches certain value, stop absorption.
7. the adsorption method of an oil gas or escaping gas is characterized in that, comprising:
The 1st step was connected the adsorption tanks that adsorbent is housed with oil gas generator or escaping gas generating means, make adsorbent absorption oil gas or volatile gas;
The 2nd step, in absorption oil gas or volatile gas process, tank exit concentration upon adsorption reach with entrance concentration near the time, with all entrance and exit valve closings on the adsorption tanks one day, make adsorbent fully adsorb oil gas or escaping gas, by the adsorbent weight behind weigh absorption oil gas or the escaping gas, calculate oil gas or the escaping gas adsorbance of adsorbent;
The 3rd step was connected the adsorbent tank of finishing after the absorption with the vacuum unit, adsorbent pot bottom oil-feed air valve is closed adsorbent tank top exhaust-valve and blowback valve;
The 4th step, the vacuum-pump power supply of opening the vacuum unit begins to carry out the vacuum desorption process, vacuum reaches 0.095 ~ 0.098MPa scope, the blowback valve opening at control adsorption tanks top, make the blowback air inflow keep certain numerical value, when the weight of adsorbent remains unchanged substantially, think oil gas or escaping gas that can desorption under this condition be substantially all removed out, thereby realize the desorption process of adsorbent, the weight of adsorbent behind weight by adsorbent before the desorption of weighing and the desorption is calculated desorption rate and the desorption efficient of adsorbent;
The 5th step, adsorbent tank behind the desorption is reconnected oil gas generator to be adsorbed, when tank outlet NMHC concentration upon adsorption reaches certain value, stop absorption, by the adsorbent weight behind weigh absorption oil gas or the escaping gas, calculate oil gas or the escaping gas adsorbance of adsorbent;
The 6th step repeated for the 3rd step to the 5th step, stopped when the each adsorbance of adsorbent and desorption rate remain unchanged, and finished whole process.
8. the recovery of claim 1 or 2 described oil gas or the escaping gas application of method in petrochemical industry safety in production process of adsorbent desorption oil gas or escaping gas.
9. the application of the adsorption method of the described oil gas of claim 3 to 7 or escaping gas in petrochemical industry safety in production process.
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| CN201210428430.4A CN102921270B (en) | 2012-10-31 | 2012-10-31 | The petroleum vapor recovery method of adsorbent desorption oil gas or escaping gas |
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| CN201210428430.4A CN102921270B (en) | 2012-10-31 | 2012-10-31 | The petroleum vapor recovery method of adsorbent desorption oil gas or escaping gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104474837A (en) * | 2014-11-04 | 2015-04-01 | 中国石油化工股份有限公司 | Passivation method of oil-gas recovery system adsorbent |
| CN104849169A (en) * | 2015-05-26 | 2015-08-19 | 中国石油化工股份有限公司 | Method for testing adsorption and desorption performance of adsorption materials for oil gas recovery |
| CN109701507A (en) * | 2019-01-25 | 2019-05-03 | 安徽国孚凤凰科技有限公司 | A kind of the solvent desorbing device and process of silica gel purification Reclaimed Base Oil |
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| JPS53133581A (en) * | 1977-04-25 | 1978-11-21 | Calgon Corp | Active carbon adsorption apparatus for collecting spilt gasoline |
| CA2160846A1 (en) * | 1994-10-21 | 1996-04-22 | Herbert Edward Reinhold Iii | Natural gas enrichment process |
| US6486375B1 (en) * | 2001-05-02 | 2002-11-26 | John Zink Company, Llc | Process for recovering hydrocarbons from inert gas-hydrocarbon vapor mixtures |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104474837A (en) * | 2014-11-04 | 2015-04-01 | 中国石油化工股份有限公司 | Passivation method of oil-gas recovery system adsorbent |
| CN104849169A (en) * | 2015-05-26 | 2015-08-19 | 中国石油化工股份有限公司 | Method for testing adsorption and desorption performance of adsorption materials for oil gas recovery |
| CN109701507A (en) * | 2019-01-25 | 2019-05-03 | 安徽国孚凤凰科技有限公司 | A kind of the solvent desorbing device and process of silica gel purification Reclaimed Base Oil |
| CN109701507B (en) * | 2019-01-25 | 2023-12-26 | 安徽国孚凤凰科技有限公司 | Solvent desorption device and process method for refining and regenerating base oil by using silica gel |
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| CN102921270B (en) | 2015-09-23 |
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