US2014044A - Method of cleaning gas - Google Patents
Method of cleaning gas Download PDFInfo
- Publication number
- US2014044A US2014044A US726404A US72640434A US2014044A US 2014044 A US2014044 A US 2014044A US 726404 A US726404 A US 726404A US 72640434 A US72640434 A US 72640434A US 2014044 A US2014044 A US 2014044A
- Authority
- US
- United States
- Prior art keywords
- gas
- oil
- dust
- blast furnace
- gases
- Prior art date
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
Definitions
- This invention relates to an improved method for treating gas and aims to provide for the conservation of the sensible heat of such gas.
- the invention will be apparent from the following detailed disclosures when read in connection with the accompanying drawings and will bedefined with particularity in the appended claims.
- the invention is exemplified by the steps of the process in the following specification and by the apparatus shown in the drawings for performing such steps. i
- Figul is illustrative of suitable apparatus tor practicing the invention, the view being partly in elevation and partly in vertical section;
- Dry methods involve the use of centrifugal force and electrical precipitation and the passing of dust laden gases at slow velocities to extremely large gas containers, in order that the dust may settle by gravity at the bottom thereof.
- cold or cool water is usually supplied in the necessary amounts by means or equipment designed to bring the hot gases into intimate contact with the washing water, care being taken to provide a sumcient volume of water for any given temperature, so as to keep the heat absorbed from the hot dust laden gases from raising the temperature of the water to 212 degrees F.
- the hot water resulting from prior practice is usually discharged and fresh cool or cold water is continuously supplied to replace the ejected hot water. The outgoing hot water thus carries away a large percentage of the sensible heat.
- My invention aims to overcome the shortcom- 5 ings of the prior practice and to conserve the sensible heat in the hot gases.
- I use a liquid other than water whose boiling or vaporizing point is above the temperature of the dust laden gas to be cleaned. It is apparent that 10 such high boiling point liquid, if recirculated will not take away the sensible heat from the'gases other than that amount of sensible heat required to initially raise the temperature of the body of liquid used for the wet washing. 15
- the invention while not limited thereto, is particularly well suited for use in cleaning blast furnace gases.
- Suchgas on ejection from the furnace has a temperature in the neighborhood of 400 degrees F., and I- have discovered that it can 20 be effectively cleaned withoutan appreciable loss of sensible heat by subjecting the gas to the Washing action ofiinely divided jets or sprays of fuel oil, whose boiling point is approximately 570 degrees F.
- fuel oil can be readily and 25 economically secured and the difference between its boiling point and the normal temperature of the efiuent gases from a blast furnace are such that the washing oil will not be vaporized and there will be little or no oil loss, hence the same 30 can be recirculated repeatedly, the precipitated dust being periodically withdrawn as a sludge.
- Such sludge is useful in the process because upon withdrawal it is in excellent condition for recharging into the blast furnace. 35
- the entrained oil and coke dust are recovered as fuel in the blast furnace and the ore dust will have the same value as the ore normally charged to the furnace. It is understood that the coke dust and ore dust just referred to are the dust 40 particles removed by the oil spray.
- ill conventionally represents a blast furnace having a downtake it through which the dust laden 4 gases are elected. These gases are led to an annular pipe it which surrounds the cylindrical washer or tower i6 supported by suitable columns, or other structural members ill.
- the dirty gas flows from the pipe M by Way of so tuyeres ii to the washer it.
- the lower part of the washer, as indicated at 20, is of substan tially conical form and provides a chamber 22, in which the oil and dust particles separate as will hereinafter appear.
- a bell it carried on a 55 7 upper part of the body of oil in the washer by way of pipe 34, such oil being forced by means of pipes 36 and branch 38 to a plurality of spray pipes 40 and 42, located in the. washer at a plane above the tuyeres 15.
- the dust laden gas ejected from the blast furnace through the -tuyeres l5 flows upwardly and is caused to comingle with the sprays of high boiling point oil, the clean hot gas being passed out through an oiftake duct 44.
- I may provide a settling box 46, such as shown in Figs. 2 to 4 inclusive.
- This box will be connected with the washer tank by pipe 34 and with pump by pipe 34.
- the pump serving to recirculate the washing oil by way of pipe 36 to the spray pipes 40 and 42.
- the settling box will have a plurality of baflles 48 therein, so as to compel the eilluent liquid from the washer to travel in a circuitous path, in order to facilitate the settling out of the dust particles in the separate zones defined by the baffles or weirs 48. It is contemplated that the settling box 46 may be covered with suitable insulating material so as to retain the heat in the oil or to prevent its loss of heat by radiation.
- the method which comprises subjecting such dust laden gas to the action of a spray of fuel oil whose boiling point is higher than the temperature of such gas.
- the method which comprises subjecting a supply of said gas at a temperature of approximately 400 degrees F., to the spraying action of fuel oil whose boiling point is approximately 5'70 degrees F., and reusing the same oil for such spraying action so as to conserve the sensible heat of the hot blast furnace gas.
- the method which comprises subjecting the dust laden gas ejected from the furnace to the action of a spray of hot oil whose boiling point is higher than the temperature of the gas.
- the method which comprises subjecting the dust laden gas ejected from the furnace to the action of a spray of hot oil whose boiling point is higher than the temperature of the gas, collecting the oil and precipitated dust resulting from said spraying and utilizing the collected oil for such spraying.
- the method which comprises subjecting dust laden gas ejected from a blast furnace to the action of a spray of hot oil whose boiling point is higher than the temperature of such gas, collecting the oil and precipitated dust resulting from such spraying and recirculating part of the collected oil to produce said oil spray.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Description
- Sept. 10, 1935. A. B; HASWELL 2,014,044
' METHOD OF CLEANING GAS Filed May 18, 1934 2 Sheets-Sheet l Aer/vale BfiJM ELL ATTORNEYS r P 10, 1935- A. B. HASWELL 2,014,044
METHOD OF CLEANING GAS Filed May 18, 1954 2 Sheets-Sheet 2 r r f INVENTOR 14E THU/e 5. 15 215144541.
ATTORN EYS Patented Sept. 10, 1935 UNITED STATES PATENT OFFICET Arthur B. Hasweil, Birmingham, Ala. Application May 18, 1934, Serial No. 726,404
'iClaims.
This invention relates to an improved method for treating gas and aims to provide for the conservation of the sensible heat of such gas. The invention will be apparent from the following detailed disclosures when read in connection with the accompanying drawings and will bedefined with particularity in the appended claims. The invention is exemplified by the steps of the process in the following specification and by the apparatus shown in the drawings for performing such steps. i
In the drawings Figul is illustrative of suitable apparatus tor practicing the invention, the view being partly in elevation and partly in vertical section; Figs. 2, 3 and 4 represent apparatus to be used in a slightly modified manner of practicing the inven= tion.
Heretoi'ore, blast furnace and other dust laden gases have been cleaned in many different ways. There is a main general line of distinction between known methods, namely, the dry methods and the wet methods. Dry methods involve the use of centrifugal force and electrical precipitation and the passing of dust laden gases at slow velocities to extremely large gas containers, in order that the dust may settle by gravity at the bottom thereof.
Many of the wet methods utilize water as the washing medium and various expedients have been utilized for bringing the dust laden gases into intimate contact with water so as to precipi= tate the dust. Where water is the washing medium, the same must obviously be kept below a temperature of 212 degrees F., at which temper-= ature it vaporizes. The ejected flue gases irom blast furnaces are generally of a temperature ap= proximating 400 degrees F. When such highly heated gases are brought into intimate contact with water, which essentially must be below 212' degrees F., it is clear that the gases must give up part of their sensible heat to the water. Or, if the water used is maintained at a temperature approximating its boiling point the heat from the dust laden gases will vaporize it. This is undesirable and for this reason cold or cool water is usually supplied in the necessary amounts by means or equipment designed to bring the hot gases into intimate contact with the washing water, care being taken to provide a sumcient volume of water for any given temperature, so as to keep the heat absorbed from the hot dust laden gases from raising the temperature of the water to 212 degrees F. The hot water resulting from prior practice is usually discharged and fresh cool or cold water is continuously supplied to replace the ejected hot water. The outgoing hot water thus carries away a large percentage of the sensible heat.
My invention aims to overcome the shortcom- 5 ings of the prior practice and to conserve the sensible heat in the hot gases. To these ends, I use a liquid other than water whose boiling or vaporizing point is above the temperature of the dust laden gas to be cleaned. It is apparent that 10 such high boiling point liquid, if recirculated will not take away the sensible heat from the'gases other than that amount of sensible heat required to initially raise the temperature of the body of liquid used for the wet washing. 15
The invention, while not limited thereto, is particularly well suited for use in cleaning blast furnace gases. Suchgas on ejection from the furnace has a temperature in the neighborhood of 400 degrees F., and I- have discovered that it can 20 be effectively cleaned withoutan appreciable loss of sensible heat by subjecting the gas to the Washing action ofiinely divided jets or sprays of fuel oil, whose boiling point is approximately 570 degrees F. Such fuel oil can be readily and 25 economically secured and the difference between its boiling point and the normal temperature of the efiuent gases from a blast furnace are such that the washing oil will not be vaporized and there will be little or no oil loss, hence the same 30 can be recirculated repeatedly, the precipitated dust being periodically withdrawn as a sludge. Such sludge is useful in the process because upon withdrawal it is in excellent condition for recharging into the blast furnace. 35 The entrained oil and coke dust are recovered as fuel in the blast furnace and the ore dust will have the same value as the ore normally charged to the furnace. It is understood that the coke dust and ore dust just referred to are the dust 40 particles removed by the oil spray.
Referring to the drawings which illustrate by way 0! example my gas cleaning method, ill conventionally represents a blast furnace having a downtake it through which the dust laden 4 gases are elected. These gases are led to an annular pipe it which surrounds the cylindrical washer or tower i6 supported by suitable columns, or other structural members ill. The dirty gas flows from the pipe M by Way of so tuyeres ii to the washer it. The lower part of the washer, as indicated at 20, is of substan tially conical form and provides a chamber 22, in which the oil and dust particles separate as will hereinafter appear. A bell it carried on a 55 7 upper part of the body of oil in the washer by way of pipe 34, such oil being forced by means of pipes 36 and branch 38 to a plurality of spray pipes 40 and 42, located in the. washer at a plane above the tuyeres 15. Thus the dust laden gas ejected from the blast furnace through the -tuyeres l5, flows upwardly and is caused to comingle with the sprays of high boiling point oil, the clean hot gas being passed out through an oiftake duct 44.
From the foregoing, it will be understood that, once the body of high boiling point washing oil 'is brought substantially to the temperature of the blast furnace gas being heated, by continually or repeatedly circulating or utilizing the same 011 for the washing jets or sprays, practically no further sensible heat of the dirty gases will be lost. It will also be appreciated that by utilizing oil of a higher boiling point than the temperature of the gas being handled, the same will not be vaporized and passed off. Thus the same 011 will be repeatedly used for the washing sprays.
If desired, instead of depending upon the precipitation of the dust particles or sludge in the bottom of the washer, I may provide a settling box 46, such as shown in Figs. 2 to 4 inclusive.
This box will be connected with the washer tank by pipe 34 and with pump by pipe 34. The pump serving to recirculate the washing oil by way of pipe 36 to the spray pipes 40 and 42. The settling box will have a plurality of baflles 48 therein, so as to compel the eilluent liquid from the washer to travel in a circuitous path, in order to facilitate the settling out of the dust particles in the separate zones defined by the baffles or weirs 48. It is contemplated that the settling box 46 may be covered with suitable insulating material so as to retain the heat in the oil or to prevent its loss of heat by radiation.
While the invention has been described with particular reference to the cleaning of blast furnace gases, it will be understood that it is not limited thereto, it being well applicable to the cleaning of other gases. It is also to be understood that, while I refer to the use of high boiling point fuel oil as a washing medium, high boiling point liquids other than 011 can also be used so long as they do not vaporize at the temperature of the gas being'subjected to washing treatment.
Since various modifications may be made by those skilled in the art, it is tobe understood that the drawings and description are to be construed in an illustrative rather than a limiting sense and that the claims are to be interpreted as broadly as is consistent with the teachings of the prior art.
What I claim is:-
1. In the cleaning of dust laden blast furnace gas, the method which comprises subjecting such dust laden gas to the action of a spray of fuel oil whose boiling point is higher than the temperature of such gas.
-2. In the cleaning of dust laden blast furnace gas, the method which comprises subjecting a supply of said gas at a temperature of approximately 400 degrees F., to the spraying action of fuel oil whose boiling point is approximately 5'70 degrees F., and reusing the same oil for such spraying action so as to conserve the sensible heat of the hot blast furnace gas.
3. In the cleaning of blast furnace gas, the method which comprises subjecting the dust laden gas ejected from the furnace to the action of a spray of hot oil whose boiling point is higher than the temperature of the gas.
4. In the cleaning of blast furnace gas, the method which comprises subjecting the dust laden gas ejected from the furnace to the action of a spray of hot oil whose boiling point is higher than the temperature of the gas, collecting the oil and precipitated dust resulting from said spraying and utilizing the collected oil for such spraying.
5. In the cleaning of blast furnace gas, the method which comprises subjecting dust laden gas ejected from a blast furnace to the action of a spray of hot oil whose boiling point is higher than the temperature of such gas, collecting the oil and precipitated dust resulting from such spraying and recirculating part of the collected oil to produce said oil spray.
6. In the cleaning of blast furnace gas, the method which comprises subjecting dust laden gas ejected from a blast furnace to the action of a spray of hot oil whose boiling point is higher than the temperature of such gas, collecting the 4,
oil and precipitated dust resulting from such spraying and recirculating part of the collected oil to produce said oil spray and utilizing the sludge of precipitated dust as part of the blast furnace charge.
7. In the cleaning of blast furnace gas, the
oil and precipitated dust resulting from such' .spraying and recirculating part of the collected oil to produce said 011 spray, periodically withdrawing the precipitated dust sludge and charging it to a blast furnace.
ARTHUR B. HASWELL.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US726404A US2014044A (en) | 1934-05-18 | 1934-05-18 | Method of cleaning gas |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US726404A US2014044A (en) | 1934-05-18 | 1934-05-18 | Method of cleaning gas |
Publications (1)
Publication Number | Publication Date |
---|---|
US2014044A true US2014044A (en) | 1935-09-10 |
Family
ID=24918469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US726404A Expired - Lifetime US2014044A (en) | 1934-05-18 | 1934-05-18 | Method of cleaning gas |
Country Status (1)
Country | Link |
---|---|
US (1) | US2014044A (en) |
Cited By (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2561347A (en) * | 1948-08-20 | 1951-07-24 | Theodore G Kennard | Charging top for cupola furnaces |
US2831762A (en) * | 1954-04-06 | 1958-04-22 | Waagner Biro Ag | Treating converter waste gases |
US2868853A (en) * | 1956-10-25 | 1959-01-13 | Ethyl Corp | Acid scrubber |
US2868852A (en) * | 1956-10-25 | 1959-01-13 | Ethyl Corp | Oil scrubber |
US3527696A (en) * | 1969-12-17 | 1970-09-08 | Wallover Oil Co | Method and apparatus for reclaiming waste industrial oils |
US3607217A (en) * | 1968-12-11 | 1971-09-21 | Exxon Research Engineering Co | Agglomeration of particulate metals |
US4312646A (en) * | 1977-11-17 | 1982-01-26 | Ciba-Geigy Corporation | Gas scrubbing tower |
US5502245A (en) * | 1995-06-07 | 1996-03-26 | Twenty-First Century Research Corporation | Methods of making intermediate oxidation products by controlling transient conversion in an atomized liquid |
US5558842A (en) * | 1995-06-07 | 1996-09-24 | Twenty-First Century Research Corporation | Devices for making reaction products by controlling pre-coalescing temperature and transient temperature difference in an atomized liquid |
US5580531A (en) * | 1995-06-07 | 1996-12-03 | Twenty-First Century Research Corporation | Devices for making reaction products by controlling transient conversion in an atomized liquid |
US5654475A (en) * | 1996-03-25 | 1997-08-05 | Twenty-First Century Research Corporation | Methods of making intermediate oxidation products by controlling oxidation rates in an atomized liquid |
US5801282A (en) * | 1995-06-07 | 1998-09-01 | Twenty-First Century Research Corporation | Methods of making intermediate oxidation products by controlling pre-coalescing temperature and transient temperature difference in an atomized liquid |
US5801273A (en) * | 1996-08-21 | 1998-09-01 | Twenty-First Century Research Corporation | Methods and devices for controlling the reaction rate of a hydrocarbon to an intermediate oxidation product by pressure drop adjustments |
US5817868A (en) * | 1996-11-12 | 1998-10-06 | Twenty-First Century Research Corporation | Method and devices for controlling the oxidation of a hydrocarbon to an acid by regulating temperature/conversion relationship in multi-stage arrangements |
US5824819A (en) * | 1996-12-18 | 1998-10-20 | Twenty-First Century Research Corporation | Methods of preparing an intermediate oxidation product from a hydrocarbon by utilizing an activated initiator |
US5883292A (en) * | 1996-01-17 | 1999-03-16 | Twenty-First Century Research Corporation | Reaction control by regulating internal condensation inside a reactor |
US5908589A (en) * | 1997-12-08 | 1999-06-01 | Twenty-First Century Research Corporation | Methods for separating catalyst from oxidation mixtures containing dibasic acids |
US5922908A (en) * | 1996-06-24 | 1999-07-13 | Twenty-First Century Research Corporation | Methods for preparing dibasic acids |
US5929277A (en) * | 1997-09-19 | 1999-07-27 | Twenty-First Century Research Corporation | Methods of removing acetic acid from cyclohexane in the production of adipic acid |
US5938820A (en) * | 1996-06-27 | 1999-08-17 | Cmi-Schneible Company | Air and gas scrubber using recycled water mixture |
US6037491A (en) * | 1997-07-25 | 2000-03-14 | Rpc Inc. | Methods and devices for controlling hydrocarbon oxidations to respective acids by adjusting the solvent to hydrocarbon ratio |
US6039902A (en) * | 1996-06-24 | 2000-03-21 | Rpc Inc. | Methods of recycling catalyst in oxidations of hydrocarbons |
US6051055A (en) * | 1996-02-01 | 2000-04-18 | Mitsubishi Heavy Industries, Ltd. | Exhaust gas desulfurization system |
US6103933A (en) * | 1996-11-07 | 2000-08-15 | Rpc Inc. | Methods for controlling the oxidation rate of a hydrocarbon by adjusting the ratio of the hydrocarbon to a rate-modulator |
US6129875A (en) * | 1998-02-19 | 2000-10-10 | Rpc Inc. | Process of separating catalyst from oxidation mixtures |
US6143927A (en) * | 1996-06-24 | 2000-11-07 | Rpc Inc. | Methods for removing catalyst after oxidation of hydrocarbons |
US6218573B1 (en) | 1998-07-02 | 2001-04-17 | Rpc Inc. | Methods of recovering catalyst in solution in the oxidation of cyclohexane to adipic acid |
US6232495B1 (en) | 1998-02-09 | 2001-05-15 | Rpc Inc. | Methods for treating cobalt catalyst in oxidation mixtures resulting from oxidation of hydrocarbons to dibasic acids |
US6288270B1 (en) | 1996-06-24 | 2001-09-11 | Rpc Inc. | Methods for controlling the reaction rate of a hydrocarbon to an acid by making phase-related adjustments |
US6288274B1 (en) | 1996-08-21 | 2001-09-11 | Rpc Inc. | Methods and devices for controlling the reaction rate and/or reactivity of hydrocarbon to an intermediate oxidation product by adjusting the oxidant consumption rate |
US20010053864A1 (en) * | 1996-08-21 | 2001-12-20 | Decoster David C. | Devices for controlling the reaction rate and/or reactivity of hydrocarbon to an intermediate oxidation product by adjusting the oxidant consumption rate |
US6337051B1 (en) | 1996-06-24 | 2002-01-08 | Rpc Inc. | Device for detecting formation of a second liquid phase |
US6340420B1 (en) | 1998-07-06 | 2002-01-22 | Rpc Inc. | Methods of treating the oxidation mixture of hydrocarbons to respective dibasic acids |
US6417128B1 (en) | 1999-04-20 | 2002-07-09 | Rpc, Inc. | Methods and replacing water and cyclohexanone with acetic acid in aqueous solutions of catalyst |
-
1934
- 1934-05-18 US US726404A patent/US2014044A/en not_active Expired - Lifetime
Cited By (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2561347A (en) * | 1948-08-20 | 1951-07-24 | Theodore G Kennard | Charging top for cupola furnaces |
US2831762A (en) * | 1954-04-06 | 1958-04-22 | Waagner Biro Ag | Treating converter waste gases |
US2868853A (en) * | 1956-10-25 | 1959-01-13 | Ethyl Corp | Acid scrubber |
US2868852A (en) * | 1956-10-25 | 1959-01-13 | Ethyl Corp | Oil scrubber |
US3607217A (en) * | 1968-12-11 | 1971-09-21 | Exxon Research Engineering Co | Agglomeration of particulate metals |
US3527696A (en) * | 1969-12-17 | 1970-09-08 | Wallover Oil Co | Method and apparatus for reclaiming waste industrial oils |
US4312646A (en) * | 1977-11-17 | 1982-01-26 | Ciba-Geigy Corporation | Gas scrubbing tower |
US5801282A (en) * | 1995-06-07 | 1998-09-01 | Twenty-First Century Research Corporation | Methods of making intermediate oxidation products by controlling pre-coalescing temperature and transient temperature difference in an atomized liquid |
US5502245A (en) * | 1995-06-07 | 1996-03-26 | Twenty-First Century Research Corporation | Methods of making intermediate oxidation products by controlling transient conversion in an atomized liquid |
US5558842A (en) * | 1995-06-07 | 1996-09-24 | Twenty-First Century Research Corporation | Devices for making reaction products by controlling pre-coalescing temperature and transient temperature difference in an atomized liquid |
US5580531A (en) * | 1995-06-07 | 1996-12-03 | Twenty-First Century Research Corporation | Devices for making reaction products by controlling transient conversion in an atomized liquid |
US5883292A (en) * | 1996-01-17 | 1999-03-16 | Twenty-First Century Research Corporation | Reaction control by regulating internal condensation inside a reactor |
US5939582A (en) * | 1996-01-17 | 1999-08-17 | Twenty-First Century Research Corporation | Reaction control by regulating internal condensation inside a reactor |
US6051055A (en) * | 1996-02-01 | 2000-04-18 | Mitsubishi Heavy Industries, Ltd. | Exhaust gas desulfurization system |
US5654475A (en) * | 1996-03-25 | 1997-08-05 | Twenty-First Century Research Corporation | Methods of making intermediate oxidation products by controlling oxidation rates in an atomized liquid |
US6337051B1 (en) | 1996-06-24 | 2002-01-08 | Rpc Inc. | Device for detecting formation of a second liquid phase |
US6294689B1 (en) | 1996-06-24 | 2001-09-25 | Rpc Inc. | Methods for removing catalyst after oxidation of hydrocarbons |
US6288270B1 (en) | 1996-06-24 | 2001-09-11 | Rpc Inc. | Methods for controlling the reaction rate of a hydrocarbon to an acid by making phase-related adjustments |
US5922908A (en) * | 1996-06-24 | 1999-07-13 | Twenty-First Century Research Corporation | Methods for preparing dibasic acids |
US6156868A (en) * | 1996-06-24 | 2000-12-05 | Rpc Inc. | Methods for preparing polymers from dibasic acids |
US6143927A (en) * | 1996-06-24 | 2000-11-07 | Rpc Inc. | Methods for removing catalyst after oxidation of hydrocarbons |
US6039902A (en) * | 1996-06-24 | 2000-03-21 | Rpc Inc. | Methods of recycling catalyst in oxidations of hydrocarbons |
US6359173B1 (en) | 1996-06-24 | 2002-03-19 | Rpc Inc. | Methods and devices for oxidizing a hydrocarbon to form an acid |
US5938820A (en) * | 1996-06-27 | 1999-08-17 | Cmi-Schneible Company | Air and gas scrubber using recycled water mixture |
US5877341A (en) * | 1996-08-21 | 1999-03-02 | Twenty-First Century Research Corporation | Methods and devices for controlling the reaction rate of a hydrocarbon to an intermediate oxidation product by pressure drop adjustments |
US6288274B1 (en) | 1996-08-21 | 2001-09-11 | Rpc Inc. | Methods and devices for controlling the reaction rate and/or reactivity of hydrocarbon to an intermediate oxidation product by adjusting the oxidant consumption rate |
US6183698B1 (en) | 1996-08-21 | 2001-02-06 | Rpc Inc. | Devices for controlling the reaction rate of a hydrocarbon to an intermediate oxidation product by pressure drop adjustments |
US20010053864A1 (en) * | 1996-08-21 | 2001-12-20 | Decoster David C. | Devices for controlling the reaction rate and/or reactivity of hydrocarbon to an intermediate oxidation product by adjusting the oxidant consumption rate |
US5801273A (en) * | 1996-08-21 | 1998-09-01 | Twenty-First Century Research Corporation | Methods and devices for controlling the reaction rate of a hydrocarbon to an intermediate oxidation product by pressure drop adjustments |
US6103933A (en) * | 1996-11-07 | 2000-08-15 | Rpc Inc. | Methods for controlling the oxidation rate of a hydrocarbon by adjusting the ratio of the hydrocarbon to a rate-modulator |
US5998572A (en) * | 1996-11-12 | 1999-12-07 | Rpc Inc. | Methods and devices for controlling the oxidation of a hydrocarbon to an acid by regulating temperature/conversion relationship in multi-stage arrangements |
US5817868A (en) * | 1996-11-12 | 1998-10-06 | Twenty-First Century Research Corporation | Method and devices for controlling the oxidation of a hydrocarbon to an acid by regulating temperature/conversion relationship in multi-stage arrangements |
US5980801A (en) * | 1996-12-18 | 1999-11-09 | Twenty-First Century Research Corporation | Methods of preparing an intermediate oxidation product from a hydrocarbon by utilizing an activated initiator |
US5824819A (en) * | 1996-12-18 | 1998-10-20 | Twenty-First Century Research Corporation | Methods of preparing an intermediate oxidation product from a hydrocarbon by utilizing an activated initiator |
US6037491A (en) * | 1997-07-25 | 2000-03-14 | Rpc Inc. | Methods and devices for controlling hydrocarbon oxidations to respective acids by adjusting the solvent to hydrocarbon ratio |
US5929277A (en) * | 1997-09-19 | 1999-07-27 | Twenty-First Century Research Corporation | Methods of removing acetic acid from cyclohexane in the production of adipic acid |
US6177053B1 (en) | 1997-09-19 | 2001-01-23 | Rpc Inc. | Devices for removing acetic acid from cyclohexane in the production of adipic acid |
US5908589A (en) * | 1997-12-08 | 1999-06-01 | Twenty-First Century Research Corporation | Methods for separating catalyst from oxidation mixtures containing dibasic acids |
US6326455B2 (en) | 1998-02-09 | 2001-12-04 | Rpc Inc. | Methods for treating cobalt catalyst in oxidation mixtures resulting from oxidation of hydrocarbons to dibasic acids |
US6232495B1 (en) | 1998-02-09 | 2001-05-15 | Rpc Inc. | Methods for treating cobalt catalyst in oxidation mixtures resulting from oxidation of hydrocarbons to dibasic acids |
US6129875A (en) * | 1998-02-19 | 2000-10-10 | Rpc Inc. | Process of separating catalyst from oxidation mixtures |
US6218573B1 (en) | 1998-07-02 | 2001-04-17 | Rpc Inc. | Methods of recovering catalyst in solution in the oxidation of cyclohexane to adipic acid |
US6433220B1 (en) | 1998-07-02 | 2002-08-13 | Rpc Inc. | Methods of extracting catalyst from a reaction mixture in the oxidation of cyclohexane to adipic acid |
US6433221B1 (en) | 1998-07-02 | 2002-08-13 | Rpc Inc. | Methods of separating catalyst in solution from a reaction mixture produced by oxidation of cyclohexane to adipic acid |
US6340420B1 (en) | 1998-07-06 | 2002-01-22 | Rpc Inc. | Methods of treating the oxidation mixture of hydrocarbons to respective dibasic acids |
US6417128B1 (en) | 1999-04-20 | 2002-07-09 | Rpc, Inc. | Methods and replacing water and cyclohexanone with acetic acid in aqueous solutions of catalyst |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2014044A (en) | Method of cleaning gas | |
AU670138B2 (en) | Process for cooling and cleaning gas, particularly blast furnace or producer gas, containing ultrafine particles, and apparatus for performing the same | |
US3032482A (en) | Process of recovering fresh water from salt water with a hot heavy material | |
US2155853A (en) | Method of purifying flue gases | |
US4602438A (en) | Method and apparatus for fluidized steam drying of low rank coals with wet scrubbing | |
US2668754A (en) | Process for recovering carbon black from a gaseous suspension | |
US3971704A (en) | Method and apparatus for pollution free, destructively processing waste | |
US4252543A (en) | Process for quenching and cleaning a fuel gas mixture | |
CN104031663A (en) | Novel continuous wet quenching process | |
US899339A (en) | Extracting grease and potash salts from wool. | |
US2014764A (en) | Drying peat and other materials | |
US3774315A (en) | Process and apparatus for cooling hot briquettes | |
US4154584A (en) | Method for cooling gases containing naphthalene, tar and solids | |
US2676670A (en) | Process for the purification of gases | |
US2164593A (en) | Method for distilling oils | |
US2516992A (en) | Chemical condenser and recovery unit | |
US2048140A (en) | Method for reclamation of absorption oil | |
US2778123A (en) | Apparatus and method for separating solids, solvents, and gases | |
CN207532991U (en) | A kind of dust pelletizing system of high temperature pyrolysis gas | |
US1871815A (en) | Method of cleaning gases | |
US2044421A (en) | Removing gum-forming constituents from fuel gas | |
US1940459A (en) | Means for manufacturing soda ash | |
US2029663A (en) | Recovery of phosphorus from dilute gases | |
US1821064A (en) | Method for the purification of gases | |
US1976392A (en) | Combined gas washing and sludge recovering apparatus |