CA2052888C - Mercury removal - Google Patents
Mercury removal Download PDFInfo
- Publication number
- CA2052888C CA2052888C CA002052888A CA2052888A CA2052888C CA 2052888 C CA2052888 C CA 2052888C CA 002052888 A CA002052888 A CA 002052888A CA 2052888 A CA2052888 A CA 2052888A CA 2052888 C CA2052888 C CA 2052888C
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- Prior art keywords
- mercury
- feed stream
- sulphur
- concentration
- precursor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G25/00—Refining of hydrocarbon oils in the absence of hydrogen, with solid sorbents
- C10G25/003—Specific sorbent material, not covered by C10G25/02 or C10G25/03
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G29/00—Refining of hydrocarbon oils, in the absence of hydrogen, with other chemicals
- C10G29/06—Metal salts, or metal salts deposited on a carrier
- C10G29/10—Sulfides
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Treating Waste Gases (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
A process for the removal of mercury from a stream wherein an absorbent comprising a metal sulphide is prepared in situ, preferably by the stream also containing a sulphur compound thereby concomitantly preparing the mercury absorbent and absorbing the mercury, such that the formation of ineffective and undesired metal compounds e.g, sulphates is avoided.
Description
1 $35975 Mercury Removal This invention relates to a process for the removal of mercury from a gaseous or liquid stream.
GB-B-1533059 discloses the use of a pre-sulphided G qhso.-bent comprising copper sulphide for the absornti~n of mer~urv from a natural gas stream containing mercury. The pre-sulphided absorbent is prepared by forming a precursor comprising a copper compound, e.g. an extrudate comprising basic copper carbonate and a refractory cement binder, and then contacting the precursor with a gaseous stream containing a sulphur compound, e.g. hydrogen sulphide, so as to fully sulphide the copper compound. The pre-sulphided absorbent is then used to remove mercury from a sulphur-free natural gas stream. It is also shown that an absorbent comprising copper in the reduced, i.e. metallic, state is less effective at absorbing mercury than the pre-sulphided absorbent.
Japanese kokoku JP-75001477 shows that a pre-sulphided absorbent comprising copper sulphide is capable of absorbing mercury from a stream of electrolytic hydrogen containing mercury.
It has now been found that a pre-sulphided absorbent comprising a metal sulphide, in particular a pre-sulphided absorbent comprising copper sulphide, may exhibit a change in its mercury absorption capacity during storage such that a freshly pre-sulphided absorbent is more readily able to absorb mercury than a similar absorbent which has been stored for subsequent use.
It has also been found that the ability of an absorbent comprising a metal sulphide to absorb mercury is dependent on the conditions under which the sulphiding is conducted. Furthermore, it has also been found that it is possible to improve the performance of a mercury removal process using an absorbent comprising a metal sulphide by concomitantly forming the metal sulphide during the absorption of the mercury.
Accordingly the present invention provides a mercury removal process comprising contacting a mercury-containing feed stream with an absorbent comprising a metal sulphide capable of
GB-B-1533059 discloses the use of a pre-sulphided G qhso.-bent comprising copper sulphide for the absornti~n of mer~urv from a natural gas stream containing mercury. The pre-sulphided absorbent is prepared by forming a precursor comprising a copper compound, e.g. an extrudate comprising basic copper carbonate and a refractory cement binder, and then contacting the precursor with a gaseous stream containing a sulphur compound, e.g. hydrogen sulphide, so as to fully sulphide the copper compound. The pre-sulphided absorbent is then used to remove mercury from a sulphur-free natural gas stream. It is also shown that an absorbent comprising copper in the reduced, i.e. metallic, state is less effective at absorbing mercury than the pre-sulphided absorbent.
Japanese kokoku JP-75001477 shows that a pre-sulphided absorbent comprising copper sulphide is capable of absorbing mercury from a stream of electrolytic hydrogen containing mercury.
It has now been found that a pre-sulphided absorbent comprising a metal sulphide, in particular a pre-sulphided absorbent comprising copper sulphide, may exhibit a change in its mercury absorption capacity during storage such that a freshly pre-sulphided absorbent is more readily able to absorb mercury than a similar absorbent which has been stored for subsequent use.
It has also been found that the ability of an absorbent comprising a metal sulphide to absorb mercury is dependent on the conditions under which the sulphiding is conducted. Furthermore, it has also been found that it is possible to improve the performance of a mercury removal process using an absorbent comprising a metal sulphide by concomitantly forming the metal sulphide during the absorption of the mercury.
Accordingly the present invention provides a mercury removal process comprising contacting a mercury-containing feed stream with an absorbent comprising a metal sulphide capable of
2 X35975 ~' ~' ~ '~l ~~~2~r,~
absorbing mercury and wherein the absorbent is formed by contacting in situ a precursor comprising a metal compound capable of forming the metal sulphide with a first stream containing a sulphur compound.
The present invention may be used to tr~nt '~~h~ '.az'ad and gaseous feed streams. Gaseous feed streams which are susceptible to being treated by the present invention include those which inherently contain both mercury and a sulphur compound e.g, certain natural gas streams, or a mercury containing gaseous stream to which a sulphur compound has bean added to effect mercury absorption. Suitable liquid streams include mercury containing LPG and naphtha streams.
As stated above, conventional absorbents comprising copper sulphide are pre-sulphided, i.e. they are sulphided prior to use, and are then often stored in contact with air. It has now been found that during storage substantial quantities of copper sulphate are formed which is significantly less effective as a absorbent than copper sulphide. Thus, the presence of a metal sulphate is undesirable and it is therefore preferred that the absorbent used in the present invention is substantially sulphate free. To avoid the formation of the metal sulphate, the absorbent used in the present invention is sulphided in situ, i.e. it is not pre-sulphided and stored subsequent to use in contact with air or an other oxygen containing gas. Thus, the precursor may be sulphided using a first stream which contains a suitable sulphur compound to form the absorbent and then held in-situ in a non-sulphate forming environment. It is preferred, however, that the sulphiding of the precursor and the absorption of mercury occur together, i.e, they are concomitant, thereby avoiding the need for a separate sulphiding process and the subsequent storage difficulties. Thus, the present invention may be advantageously used on streams which contain both mercury and sulphur compounds.
Preferably the concomitant absorption of mercury and sulphur is conducted at a temperature below 100oC in that at such temperatures the overall capacity for mercury absorption is
absorbing mercury and wherein the absorbent is formed by contacting in situ a precursor comprising a metal compound capable of forming the metal sulphide with a first stream containing a sulphur compound.
The present invention may be used to tr~nt '~~h~ '.az'ad and gaseous feed streams. Gaseous feed streams which are susceptible to being treated by the present invention include those which inherently contain both mercury and a sulphur compound e.g, certain natural gas streams, or a mercury containing gaseous stream to which a sulphur compound has bean added to effect mercury absorption. Suitable liquid streams include mercury containing LPG and naphtha streams.
As stated above, conventional absorbents comprising copper sulphide are pre-sulphided, i.e. they are sulphided prior to use, and are then often stored in contact with air. It has now been found that during storage substantial quantities of copper sulphate are formed which is significantly less effective as a absorbent than copper sulphide. Thus, the presence of a metal sulphate is undesirable and it is therefore preferred that the absorbent used in the present invention is substantially sulphate free. To avoid the formation of the metal sulphate, the absorbent used in the present invention is sulphided in situ, i.e. it is not pre-sulphided and stored subsequent to use in contact with air or an other oxygen containing gas. Thus, the precursor may be sulphided using a first stream which contains a suitable sulphur compound to form the absorbent and then held in-situ in a non-sulphate forming environment. It is preferred, however, that the sulphiding of the precursor and the absorption of mercury occur together, i.e, they are concomitant, thereby avoiding the need for a separate sulphiding process and the subsequent storage difficulties. Thus, the present invention may be advantageously used on streams which contain both mercury and sulphur compounds.
Preferably the concomitant absorption of mercury and sulphur is conducted at a temperature below 100oC in that at such temperatures the overall capacity for mercury absorption is
3 $35975 increased. Temperatures as low as 20oC may be used to good effect in the present invention.
The mercury may be in the form of mercury vapour, organomercuric, or organomercurous compounds. Typically the ~~~~pn*r°-t?~n ~~ mez~,~.ry in a gaseous ~eed stream is ~rom 0.01 to 500 ug.Nm°~, and more usually between 10 to 200ug.Nm°3.
The sulphur compound used to sulphide the precursor may be one or more sulphur compounds such as hydrogen sulphide, carbonyl sulphide, mercaptans and polysulphides. Where concomitant sulphiding and mercury absorption occurs the amount of sulphur compound that is present depends on the type of sulphur compound and metal compound used. Usually, a concentration ratio, as defined by the ratio of sulphur compound (expressed as hydrogen sulphide) concentration (v/v) to mercury concentration (v/v), of ~5 at least one, and preferably o~ at least l0 is used so that the precursor is sufficiently sulphided. Should the initial concentration of the sulphur compound in the feed stream be below the level necessary to establish the desired ratio of sulphur compound to mercury compound concentration then it is preferred that the concentration of the sulphur compound is increased by any suitable method, e.g. by the addition of further quantities of the sulphur compound, or by tha use of a molecular sieve or semi-permeable membrane to selectively increase the concentration of the sulphur compound.
The metal may be any which provides a metal compound which shows a suitable capacity for being sulphided and for mercury absorption. Examples of suitable metals are iron and copper, and in particular copper. Certain other metals, however, are generally unable to provide either compounds orhich can be suitably sulphided, e.g. aluminium, or sulphided compounds which can adequately absorb mercury e.g. zinc. Nevertheless, a compound of such an other metal may be present as a binding or support agent which improves the structural integrity of the absorbent, and/or as a promoter which enhances the sulphiding of the precursor and/or the absorption of mercury by the absorbent.
~0~2r~~~
A metal compound suitable fax use in an absorbent precursor is one which may be readily aulphided and may include the oxide, carbonate, and/or basic carbonate. A particularly suitable metal compound is thus basic copper carbonate.
The precursor i..ii:a~i.'~e.aialg ,'.~ a. W d~'.~,:. compound may be in any suitable form, e.g, as a granule, extrudate, or tablet.
Particularly effective absorbents are those which are prepared frog precursors having a capacity to be highly sulphided. Thus, it is preferred that the amount of sulphide forming compound of the metal present in the precursor is such that the precursor may ' be aulphided to achieve a sulphur loading of at least 15% w/w, and particularly at least 20X w/w.
The present invention is 311ustrated by the following examples.
15 Example 1 A freshly sulphided material containing copper and zinc sulphides, having a total sulphur content of 19X w/w was tested for its ability to remove mercury from a simulated natural gas feed stream. The material had previously been sulphided at 20oC
2C and ~. atm, using a natural gas stream which was saturated with water, and contained 1X v/v hydrogen sulphide.
~, Mercury removal was assessed at 20oC, 1 atm., by contacting the sulphided material at a space velocity of 10000 hr-1 with methane containing 1.d ppm mercury. ' 25 Example 2 Example 1 was repeated except that the sulphided material was stored under ambient conditions, and in contact with air, far 8 months prior to the mercury removal assessment.
The results of Examples l and 2 are shown in Table 1.
c ~ r.
~ ' cJ
C.~
Table 1 Days on Mercury Slip X
line Example 1 Example 2 <1 0.0 100.0 9 0.0 -14 2.5 16 5,0 _ 18 7.5 19 10.0 It can thus be seen that the ability of the sulphided material to remove mercury diminishes on storage. Analysis of the materials used in Examples 1 and 2 showed the presence of copper sulphate in the material of Example 2 and the absence of copper sulphate in the material of Example 1.
Example 3 Example 1 was repeated using a sulphided material containing 6.2% w/w of sulphur.
Example 4 Example repeated except sulphiding 3 was that the was' conducted at a temperature loading of of 110oC, 17.7X
to a sulphur w/w.
Example Example repeated except sulphur loading
The mercury may be in the form of mercury vapour, organomercuric, or organomercurous compounds. Typically the ~~~~pn*r°-t?~n ~~ mez~,~.ry in a gaseous ~eed stream is ~rom 0.01 to 500 ug.Nm°~, and more usually between 10 to 200ug.Nm°3.
The sulphur compound used to sulphide the precursor may be one or more sulphur compounds such as hydrogen sulphide, carbonyl sulphide, mercaptans and polysulphides. Where concomitant sulphiding and mercury absorption occurs the amount of sulphur compound that is present depends on the type of sulphur compound and metal compound used. Usually, a concentration ratio, as defined by the ratio of sulphur compound (expressed as hydrogen sulphide) concentration (v/v) to mercury concentration (v/v), of ~5 at least one, and preferably o~ at least l0 is used so that the precursor is sufficiently sulphided. Should the initial concentration of the sulphur compound in the feed stream be below the level necessary to establish the desired ratio of sulphur compound to mercury compound concentration then it is preferred that the concentration of the sulphur compound is increased by any suitable method, e.g. by the addition of further quantities of the sulphur compound, or by tha use of a molecular sieve or semi-permeable membrane to selectively increase the concentration of the sulphur compound.
The metal may be any which provides a metal compound which shows a suitable capacity for being sulphided and for mercury absorption. Examples of suitable metals are iron and copper, and in particular copper. Certain other metals, however, are generally unable to provide either compounds orhich can be suitably sulphided, e.g. aluminium, or sulphided compounds which can adequately absorb mercury e.g. zinc. Nevertheless, a compound of such an other metal may be present as a binding or support agent which improves the structural integrity of the absorbent, and/or as a promoter which enhances the sulphiding of the precursor and/or the absorption of mercury by the absorbent.
~0~2r~~~
A metal compound suitable fax use in an absorbent precursor is one which may be readily aulphided and may include the oxide, carbonate, and/or basic carbonate. A particularly suitable metal compound is thus basic copper carbonate.
The precursor i..ii:a~i.'~e.aialg ,'.~ a. W d~'.~,:. compound may be in any suitable form, e.g, as a granule, extrudate, or tablet.
Particularly effective absorbents are those which are prepared frog precursors having a capacity to be highly sulphided. Thus, it is preferred that the amount of sulphide forming compound of the metal present in the precursor is such that the precursor may ' be aulphided to achieve a sulphur loading of at least 15% w/w, and particularly at least 20X w/w.
The present invention is 311ustrated by the following examples.
15 Example 1 A freshly sulphided material containing copper and zinc sulphides, having a total sulphur content of 19X w/w was tested for its ability to remove mercury from a simulated natural gas feed stream. The material had previously been sulphided at 20oC
2C and ~. atm, using a natural gas stream which was saturated with water, and contained 1X v/v hydrogen sulphide.
~, Mercury removal was assessed at 20oC, 1 atm., by contacting the sulphided material at a space velocity of 10000 hr-1 with methane containing 1.d ppm mercury. ' 25 Example 2 Example 1 was repeated except that the sulphided material was stored under ambient conditions, and in contact with air, far 8 months prior to the mercury removal assessment.
The results of Examples l and 2 are shown in Table 1.
c ~ r.
~ ' cJ
C.~
Table 1 Days on Mercury Slip X
line Example 1 Example 2 <1 0.0 100.0 9 0.0 -14 2.5 16 5,0 _ 18 7.5 19 10.0 It can thus be seen that the ability of the sulphided material to remove mercury diminishes on storage. Analysis of the materials used in Examples 1 and 2 showed the presence of copper sulphate in the material of Example 2 and the absence of copper sulphate in the material of Example 1.
Example 3 Example 1 was repeated using a sulphided material containing 6.2% w/w of sulphur.
Example 4 Example repeated except sulphiding 3 was that the was' conducted at a temperature loading of of 110oC, 17.7X
to a sulphur w/w.
Example Example repeated except sulphur loading
4 was that the was to w/w.
The resultsExamples 3 to 5 of are shown in Table 2.
Table 2 Hours Mercury Slip Z
on-line Example 3 Example Example 5 24 0.0 1.0 0.0 48 0.0 2.4 0.0 72 0.0 3:8 0.0 96 4.5 5.8 0.0 120 9.4 X12.5 0.0 144 12.1 - 0.6 It can s be seen although the materialExample 4 thu that of was 6 X35975 _ ~ rte ; F~ C) fl ~) ~~:~~!~~JL.~
laden with more than twice the amount of sulphur than that of Example 3, the material of Example 3 was superior in performance to that of Example 4. Example 5 shoos that for materials which have been sulphided under the same conditions, the greater the ~.,~ nht,r i r,p,r~;,... rr~~ morP mercury can be absorbed before mercury slip occurs.
Example 6 Example 1 was repeated using a material of the same composition as that of Mass A of UK patent, GB-B-1533059.
The freshly sulphided material was similarly assessed for its mercury removal capacity. After 2 days on-line a mercury slip of 2.51 was observed. The mercury slip increased approximately at a rate of 2.5X per day until the end of the assessment on the fifth day.
Example 7 In this Example the non-sulphided starting material of Example 1 was placed in sample baskets, and inserted into an industrial operating unit used for the removal of sulphur compounds, principally hydrogen sulphide (60 - 70 ppm), from natural gas containing 11X v/v carbon dioxide. The natural gas also contained mercury as a trace component. The unit eras operated at about 7a°C, and 50 bar. After a period of time on line, the sample baskets were retrieved and analysis of the material for sulphur and mercury contents perforaned.
The material was shown to be sulphided and to have a sulphur content of 18.1%. Furthermore, the material was shown to have a mercury content of 2.2x w/w.
Example 8 At the same time as the sample baskets of Example 7 were inserted into the operating unit, additional sample baskets containing a zinc oxide sulphur absorbent ~rere also inserted.
These were then analysed in the same manner as those of Example %.
The zinc oxide sulphur absorbent was shown to have a sulphur content of 17.3X w/w. No mercury was shown, however, to have been absorbed by the material.
The resultsExamples 3 to 5 of are shown in Table 2.
Table 2 Hours Mercury Slip Z
on-line Example 3 Example Example 5 24 0.0 1.0 0.0 48 0.0 2.4 0.0 72 0.0 3:8 0.0 96 4.5 5.8 0.0 120 9.4 X12.5 0.0 144 12.1 - 0.6 It can s be seen although the materialExample 4 thu that of was 6 X35975 _ ~ rte ; F~ C) fl ~) ~~:~~!~~JL.~
laden with more than twice the amount of sulphur than that of Example 3, the material of Example 3 was superior in performance to that of Example 4. Example 5 shoos that for materials which have been sulphided under the same conditions, the greater the ~.,~ nht,r i r,p,r~;,... rr~~ morP mercury can be absorbed before mercury slip occurs.
Example 6 Example 1 was repeated using a material of the same composition as that of Mass A of UK patent, GB-B-1533059.
The freshly sulphided material was similarly assessed for its mercury removal capacity. After 2 days on-line a mercury slip of 2.51 was observed. The mercury slip increased approximately at a rate of 2.5X per day until the end of the assessment on the fifth day.
Example 7 In this Example the non-sulphided starting material of Example 1 was placed in sample baskets, and inserted into an industrial operating unit used for the removal of sulphur compounds, principally hydrogen sulphide (60 - 70 ppm), from natural gas containing 11X v/v carbon dioxide. The natural gas also contained mercury as a trace component. The unit eras operated at about 7a°C, and 50 bar. After a period of time on line, the sample baskets were retrieved and analysis of the material for sulphur and mercury contents perforaned.
The material was shown to be sulphided and to have a sulphur content of 18.1%. Furthermore, the material was shown to have a mercury content of 2.2x w/w.
Example 8 At the same time as the sample baskets of Example 7 were inserted into the operating unit, additional sample baskets containing a zinc oxide sulphur absorbent ~rere also inserted.
These were then analysed in the same manner as those of Example %.
The zinc oxide sulphur absorbent was shown to have a sulphur content of 17.3X w/w. No mercury was shown, however, to have been absorbed by the material.
Claims (8)
1. A mercury removal process comprising contacting in situ a precursor comprising a metal compound capable of forming a metal sulphide, and which metal sulphide is capable of absorbing mercury, with a feed stream comprising a sulphur compound and mercury such that the formation of the metal sulphide is concomitant with the absorption of mercury.
2. A process according to claim 1 wherein the sulphur compound is at least one selected from the group consisting of hydrogen sulphide, carbonyl sulphide, mercaptans and polysulphides.
3. A process according to claim 1 wherein the feed stream contacts the precursor at a temperature not exceeding 100°C.
4. A process according to claim 1 wherein the feed stream contains the sulphur compound and mercury at such concentrations that the concentration ratio, defined as the ratio of concentration of the sulphur compound (v/v) to the concentration of the mercury (v/v), in the feed stream on contact of the precursor with the feed stream is at least 1:1.
5. A process according to claim 1 wherein the feed stream contains the sulphur compound at an initial concentration prior to contact of the precursor with the feed stream such that the concentration ratio, defined as the ratio of concentration of the sulphur compound (v/v) to the concentration of the mercury (v/v), is below 1:1 and the concentration of the sulphur compound in the feed stream is increased such that on contact of the precursor by the feed stream the concentration ratio is at least 1:1.
6. A process according to claim 1 wherein the metal compound is basic copper carbonate.
7. A process according to claim 1 wherein the precursor can be sulphided so as to contain a sulphur content of at least 15% w/w.
8. A process according to claim 1 wherein the feed stream is gaseous and has a mercury content from 0.01 to 500 ug.Nm-3.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB909022060A GB9022060D0 (en) | 1990-10-10 | 1990-10-10 | Mercury removal |
| GB9022060.9 | 1990-10-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2052888A1 CA2052888A1 (en) | 1992-04-11 |
| CA2052888C true CA2052888C (en) | 2001-12-25 |
Family
ID=10683521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002052888A Expired - Lifetime CA2052888C (en) | 1990-10-10 | 1991-10-07 | Mercury removal |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0480603B1 (en) |
| AU (1) | AU639833B2 (en) |
| CA (1) | CA2052888C (en) |
| DE (1) | DE69109041T2 (en) |
| GB (1) | GB9022060D0 (en) |
| NO (1) | NO178427C (en) |
| NZ (1) | NZ240095A (en) |
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| GB9607066D0 (en) * | 1996-04-03 | 1996-06-05 | Ici Plc | Purification process |
| GB9702742D0 (en) * | 1997-02-11 | 1997-04-02 | Ici Plc | Gas absorption |
| US6350372B1 (en) * | 1999-05-17 | 2002-02-26 | Mobil Oil Corporation | Mercury removal in petroleum crude using H2S/C |
| US6537443B1 (en) | 2000-02-24 | 2003-03-25 | Union Oil Company Of California | Process for removing mercury from liquid hydrocarbons |
| FR2876113B1 (en) * | 2004-10-06 | 2008-12-12 | Inst Francais Du Petrole | METHOD OF SELECTIVELY CAPTRATING ARSENIC IN ESSENCE RICH IN SULFUR AND OLEFINS |
| US7578869B2 (en) | 2005-11-30 | 2009-08-25 | Basf Catalysts Llc | Methods of manufacturing bentonite pollution control sorbents |
| US7575629B2 (en) | 2005-11-30 | 2009-08-18 | Basf Catalysts Llc | Pollutant emission control sorbents and methods of manufacture |
| US7704920B2 (en) | 2005-11-30 | 2010-04-27 | Basf Catalysts Llc | Pollutant emission control sorbents and methods of manufacture |
| GB0605232D0 (en) | 2006-03-16 | 2006-04-26 | Johnson Matthey Plc | Oxygen removal |
| GB0611316D0 (en) | 2006-06-09 | 2006-07-19 | Johnson Matthey Plc | Improvements in the removal of metals from fluid streams |
| US7753992B2 (en) | 2006-06-19 | 2010-07-13 | Basf Corporation | Methods of manufacturing mercury sorbents and removing mercury from a gas stream |
| GB0612092D0 (en) | 2006-06-20 | 2006-07-26 | Johnson Matthey Plc | Oxygen removal |
| GB0616343D0 (en) | 2006-08-17 | 2006-09-27 | Johnson Matthey Plc | Mercury removal |
| US8685351B2 (en) | 2007-09-24 | 2014-04-01 | Basf Corporation | Pollutant emission control sorbents and methods of manufacture and use |
| US8906823B2 (en) | 2007-09-24 | 2014-12-09 | Basf Corporation | Pollutant emission control sorbents and methods of manufacture and use |
| GB0802828D0 (en) | 2008-02-15 | 2008-03-26 | Johnson Matthey Plc | Absorbents |
| US8420561B2 (en) | 2009-06-16 | 2013-04-16 | Amcol International Corporation | Flue gas scrubbing |
| US8268744B2 (en) | 2009-06-16 | 2012-09-18 | Amcol International Corporation | High shear method for manufacturing a synthetic smectite mineral |
| FR2959240B1 (en) | 2010-04-23 | 2014-10-24 | Inst Francais Du Petrole | PROCESS FOR REMOVING MERCURIC SPECIES PRESENT IN A HYDROCARBONATED LOAD |
| GB2484301B8 (en) | 2010-10-05 | 2017-11-22 | The Queen's Univ Of Belfast | Process for removing metals from hydrocarbons |
| US8876952B2 (en) | 2012-02-06 | 2014-11-04 | Uop Llc | Method of removing mercury from a fluid stream using high capacity copper adsorbents |
| CN110508266B (en) * | 2018-05-21 | 2023-11-07 | 中国华电科工集团有限公司 | Mercury collection device |
| FR3130636A1 (en) | 2021-12-20 | 2023-06-23 | IFP Energies Nouvelles | PROCESS FOR THE REJUVENATION OF HEAVY METALS CAPTURE MASSES |
| FR3130635A1 (en) | 2021-12-20 | 2023-06-23 | IFP Energies Nouvelles | METHOD FOR CAPTURING HEAVY METALS BY CO-FEEDING A SULFURIZING FLUX |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2656803C2 (en) * | 1975-12-18 | 1986-12-18 | Institut Français du Pétrole, Rueil-Malmaison, Hauts-de-Seine | Process for removing mercury from a gas or liquid |
| JPS5285978A (en) * | 1976-01-12 | 1977-07-16 | Toshiba Corp | Removal of mercury in waste gas |
| US4206183A (en) * | 1976-12-09 | 1980-06-03 | Dowa Mining Co., Ltd. | Method of removing mercury-containing contaminations in gases |
| JPS5561925A (en) * | 1978-11-01 | 1980-05-10 | Kurabo Ind Ltd | Scrubbing treatment of exhaust gas containing heavy metal |
| US4740361A (en) * | 1986-03-27 | 1988-04-26 | Union Carbide Corporation | Process for removing metal carbonyls from gaseous streams |
| US4786483A (en) * | 1987-09-25 | 1988-11-22 | Mobil Oil Corporation | Process for removing hydrogen sulfide and mercury from gases |
-
1990
- 1990-10-10 GB GB909022060A patent/GB9022060D0/en active Pending
-
1991
- 1991-09-26 DE DE69109041T patent/DE69109041T2/en not_active Expired - Lifetime
- 1991-09-26 EP EP91308803A patent/EP0480603B1/en not_active Expired - Lifetime
- 1991-10-03 AU AU85557/91A patent/AU639833B2/en not_active Expired
- 1991-10-04 NZ NZ240095A patent/NZ240095A/en not_active IP Right Cessation
- 1991-10-07 CA CA002052888A patent/CA2052888C/en not_active Expired - Lifetime
- 1991-10-09 NO NO913960A patent/NO178427C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| AU639833B2 (en) | 1993-08-05 |
| NO178427C (en) | 1996-03-27 |
| CA2052888A1 (en) | 1992-04-11 |
| DE69109041D1 (en) | 1995-05-24 |
| AU8555791A (en) | 1992-04-16 |
| GB9022060D0 (en) | 1990-11-21 |
| DE69109041T2 (en) | 1995-09-21 |
| EP0480603A2 (en) | 1992-04-15 |
| NO913960D0 (en) | 1991-10-09 |
| EP0480603A3 (en) | 1993-03-10 |
| EP0480603B1 (en) | 1995-04-19 |
| NO913960L (en) | 1992-04-13 |
| NO178427B (en) | 1995-12-18 |
| NZ240095A (en) | 1994-04-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |