Leslie C Hardison
Engineers at Apple Tree Ln, Hoffman Estates, IL

License number
Colorado 10125
Issued Date
Sep 26, 1970
Renew Date
Feb 28, 1995
Expiration Date
Feb 28, 1995
Type
Professional Engineer
Address
Address
233 Apple Tree Ln, Hoffman Estates, IL 60010

Personal information

See more information about Leslie C Hardison at radaris.com
Name
Address
Phone
Leslie Hardison, age 75
6263 Brighton Bunker Hill Rd, Bunker Hill, IL 62014
Leslie E Hardison, age 75
111 Woodgate Ct, Brighton, IL 62012
(618) 372-8837
Leslie C Hardison, age 95
26803 Apple Tree Ln, Barrington, IL 60010
(847) 381-1624
Leslie E Hardison, age 75
6263 Brighton Bunker Hill Rd, Bunker Hill, IL 62014
(618) 278-4389

Professional information

Leslie Hardison Photo 1

Continuous Process For Mass Transfer Of A Liquid Reagent With Two Different Gases

US Patent:
5139753, Aug 18, 1992
Filed:
Apr 8, 1991
Appl. No.:
7/682546
Inventors:
Leslie C. Hardison - Barrington IL
Assignee:
ARI Technologies, Inc. - Palatine IL
International Classification:
C01B 1716
US Classification:
423220
Abstract:
A method and apparatus for removing H. sub. 2 S from a process gas, including a reaction chamber between an absorption chamber and an oxidizer chamber, in the polyvalent metal redox catalyzed removal of H. sub. 2 S from a process gas. The process and apparatus of the present invention inclues a first gas-liquid mass transfer zone or absorber chamber for intimately containing an H. sub. 2 S-containing process gas with an oxidized polyvalent metal redox solution for absorption of the H. sub. 2 S; and a reaction chamber in fluid communication with polyvalent metal redox solution exiting the absorption chamber through a valve-controlled cross-flow conduit. Cross flow of solution from the absorber chamber through a valve or other circulation control device to the reaction chamber provides controlled, continuous and sequential gas-liquid contact with two or more different gases in separate absorption, reaction and oxygenation zones within a single or multiple vessels.


Leslie Hardison Photo 2

Removal Of Hydrogen Sulfide From Sour Water

US Patent:
4784775, Nov 15, 1988
Filed:
Mar 2, 1987
Appl. No.:
7/020568
Inventors:
Leslie C. Hardison - Barrington IL
Assignee:
ARI Technologies, Inc. - Palatine IL
International Classification:
C02F 174
US Classification:
210712
Abstract:
Sour water is treated to remove dissolved hydrogen sulfide by means of an aqueous chelated polyvalent metal solution in a continuous recirculating system, particularly an autocirculation system, having reaction and oxygenation zones. The solution contains a small catalytic amount of chelated polyvalent metal, and the dissolved hydrogen sulfide is catalytically oxidized to sulfur in the liquid phase by means of dissolved oxygen in the solution. The sour water feed to the reaction zone is diluted by a massive recycle of oxygenated solution from the oxygenation zone before the sour water is contacted with air or other oxidizing gas used for oxygenating the used solution. A portion of the oxygenated solution containing chelated polyvalent metal is removed as the sweet water product, and replacement chelated polyvalent metal is added. The operating variables are controlled to maintain in the solution a predetermined polyvalent metal content and an effective dissolved oxygen content, and also to maintain a predetermined residence time so as to obtain high efficiency of hydrogen sulfide removal.


Leslie Hardison Photo 3

Method And Apparatus For Melting And Recovering Sulfur In Aqueous Slurries

US Patent:
4730369, Mar 15, 1988
Filed:
Jun 16, 1986
Appl. No.:
6/874869
Inventors:
Gary J. Nagl - Hoffman Estates IL
Leslie C. Hardison - Barrington IL
Assignee:
ARI Technologies, Inc. - Palatine IL
International Classification:
C01B 17027
US Classification:
23293S
Abstract:
Method and apparatus for recovering sulfur from an aqueous slurry. The slurry is passed downwardly through a shell-and-tube heat exchanger having vertically arranged tubes, wherein it is heated sufficiently to melt the sulfur. The liquid mixture leaving the heat exchanger is discharged into a first separation zone, in which a phase separation between the lighter aqueous phase and the denser liquid sulfur occurs. The upper aqueous phase is then transported to an intermediate point in the height of a vertically elongated second separation zone, while the molten sulfur is transported from the lower end of the first separation zone to a point adjacent the lower end of said second separation zone, in which an interface between the phases is maintained at a point below the entry point of the aqueous liquid phase into the second separation zone. The aqueous liquid is discharged from the top of the second separation zone, while molten sulfur is discharged from the bottom of said zone.


Leslie Hardison Photo 4

Multi-Bed Mass Transfer Column With Mobile Packing

US Patent:
5296205, Mar 22, 1994
Filed:
Apr 8, 1991
Appl. No.:
7/682543
Inventors:
Leslie C. Hardison - Barrington IL
Assignee:
ARI Technologies, Inc. - Palatine IL
International Classification:
C01B 1716
US Classification:
423220
Abstract:
A packed mass transfer tower for establishing intimate gas-liquid contact and efficient mass transfer that is less susceptible to gas or liquid channeling, gas surging and uneven distribution of gas or liquid across the cross-sectional area of the tower. In one embodiment, the packed tower includes a packing arrangement including a loosely packed bed of mobile packing material, and an adjacent, tightly packed bed of mobile packing material. The relatively tightly packed bed of mobile packing material acts as a gas distributor, as well as being a material that causes good gas-liquid contact, to provide an even flow of gas across essentially the entire cross-sectional area of the loosely packed bed of mobile packing material. In another embodiment, mobile packing elements and fixed packing elements are intermixed between the same spaced fluid-pervious grids. In the second embodiment, the fixed packing elements hug the lower pervious grid to evenly distribute gas and liquid to the mobile packing elements that are aerated above the fixed packing elements during mass transfer.


Leslie Hardison Photo 5

Autocirculation Apparatus

US Patent:
4482524, Nov 13, 1984
Filed:
Nov 24, 1980
Appl. No.:
6/210026
Inventors:
Leslie C. Hardison - Barrington IL
Assignee:
ARI Technologies, Inc. - Palatine IL
International Classification:
B01D 5336, B01J 1000, B01J 1926
US Classification:
422170
Abstract:
Apparatus for contacting a liquid reaction solution with a gas in separate reaction chambers within a single reaction vessel wherein the liquid reaction solution is continuously circulated between a first reaction chamber and a second reaction chamber within the reaction vessel but providing at least two side-by-side reaction chambers in open flow communication at their upper and lower ends with a gas supply means associated with each said chamber for introducing a gas in a finely divided form into the lower ends of each said chamber, and said gas supply means including flow control means whereby the rate of upward flow of gas in one of the chambers is greater than the rate of upward flow of gas in the other chamber so as to lower the density of the liquid reaction solution in the one chamber and provide continuous upward flow of liquid reaction solution and gas in the one chamber and downward flow of liquid reaction solution countercurrent to the flow of gas in the other chamber. The process and apparatus are particularly adapted for continuously carrying out two distinct chemical reactions between a liquid reaction solution and two different gases in a single reaction vessel, such as a catalytic oxidation-reduction process for removing hydrogen sulfide gas from a process gas stream.


Leslie Hardison Photo 6

Process And Apparatus For Removal Of H.sub.2 S With Separate Absorber And Oxidizer And A Reaction Chamber Therebetween

US Patent:
5126118, Jun 30, 1992
Filed:
Apr 8, 1991
Appl. No.:
7/682592
Inventors:
Leslie C. Hardison - Barrington IL
Assignee:
ARI Technologies, Inc. - Palatine IL
International Classification:
C01B 1716
US Classification:
423220
Abstract:
A method and apparatus including a reaction chamber interposed in a polyvalent metal redox solution flow path between an absorber chamber and an oxygenation chamber, including one or more oxygenation stages, for contact in the reaction chamber of H. sub. 2 S-laden catalytic polyvalent metal redox solution form the absorber chamber with highly oxidized polyvalent metal redox solution from the last oxygenation stage to accomplish oxidation of the dissolved H. sub. 2 S species by interaction with the oxidized redox catalyst essentially in the absence of gaseous dissolved oxygen. The highly oxidized polyvalent metal redox solution, including Fe. sup. +3 or V. sup. +5, contacts the H. sub. 2 S-laden solution from the absorber chamber for reoxidation of the dissolved HS. sup. -, S. sup. = and any of the polyvalent metal sulfur compounds (presumably a chelated iron sulfide or a vanadium sulfide), to avoid formation of sulfate or thiosulfate salts which reduce the yeild of sulfur and build up in the solution.


Leslie Hardison Photo 7

Continuous Autocirculation, Multiple Zone Mass Transfer Apparatus And Method

US Patent:
5160714, Nov 3, 1992
Filed:
Apr 8, 1991
Appl. No.:
7/682598
Inventors:
Leslie C. Hardison - Barrington IL
Assignee:
ARI Technologies, Inc. - Palatine IL
International Classification:
C01B 1716
US Classification:
423220
Abstract:
An apparatus and method of contacting a liquid with different gases sequentially in separate mass transfer zones within a single vessel, the mass transfer zones operatively connected in liquid communication with each other, including intimately contacting the liquid with a first process gas in cocurrent flow in a first mass transfer zone to effect mass transfer between the first liquid and the process gas, and introducing the liquid into a second mass transfer zone with a second gas, different from the first gas, in cocurrent flow with the second liquid, thereby effecting mass transfer between the second liquid and the second gas. The rate of flow of the liquid from said first mass transfer zone to second mass transfer zone and recirculation to the first mass transfer zone is motivated by the difference in density of the contents of the liquid phase portion of each mass transfer zone and a following liquid downcomer or flow channel connecting it to the next sequential mass transfer zone, such that after passing through the last mass transfer zone, the liquid recirculates to the first mass transfer zone. The apparatus and method are ideally suited to carrying out the process of hydrogen sulfide removal from gases by means of an air-regenerated liquid redox catalyst, such as chelated iron.


Leslie Hardison Photo 8

Solvent Recovery From Water

US Patent:
4289505, Sep 15, 1981
Filed:
Jun 13, 1980
Appl. No.:
6/159303
Inventors:
Leslie C. Hardison - Barrington IL
Joseph P. Eng - Schaumburg IL
Gary J. Nagl - Roselle IL
Assignee:
Air Resources, Inc. - Palatine IL
International Classification:
B01D 5306, C02F 128
US Classification:
55 59
Abstract:
A bed of spent solid adsorbent material previously used for removal of mixed solvent vapors from an air stream is steam stripped; the mixture of steam and vaporized solvent is passed through a condenser; and the resultant liquid condensate is passed to a decanter where the condensate separates into an upper layer of water insoluble solvent components and a bottom layer of water containing the water soluble solvent components. The upper layer is withdrawn for reuse, and the decanter bottoms stream is passed through another bed of solid adsorbent material which removes the organic solvent so as to produce substantially pure water suitable for discharge or reuse. After a period of use this adsorbent bed is also regenerated by steam stripping, and the effluent steam and solvent vapors are recycled to the same condenser serving the air treating adsorbent bed so that a combined condensate is passed to the decanter.


Leslie Hardison Photo 9

Reduction Of Nitrogen Oxide Emissions From Calciners

US Patent:
4402273, Sep 6, 1983
Filed:
Mar 1, 1982
Appl. No.:
6/353198
Inventors:
Gary J. Nagl - Hoffman Estates IL
Leslie C. Hardison - Barrington IL
Assignee:
ARI Technologies, Inc. - Palatine IL
International Classification:
F23G 500
US Classification:
110229
Abstract:
Reduction of nitrogen oxide emissions from thermal incinerators is accomplished in installations for calcining solid carbonaceous materials such as petroleum coke and anthracite coal. A hot effluent gas stream containing hydrocarbon vapors and entrained carbonaceous solid particles is removed from the calciner, and means are provided to effect preliminary combustion of the hydrocarbon vapors but not the carbonaceous solid particles in the gas stream using substantially the stoichiometric amount of combustion air. The resultant gas that is substantially free of hydrocarbons and oxygen is introduced into the thermal incinerator, and combustion of the carbonaceous solid particles is effected with additional combustion air.


Leslie Hardison Photo 10

Fluid Contacting Apparatus And Methods Of Making The Same

US Patent:
5437819, Aug 1, 1995
Filed:
Jan 26, 1994
Appl. No.:
8/187639
Inventors:
Leslie C. Hardison - Barrington IL
Assignee:
ARI Technologies, Inc. - Barrington IL
International Classification:
B01F 304
US Classification:
261 94
Abstract:
A fluid contacting apparatus is constructed by coiling a ribbed, net-like material into a cylindrical core which is then placed in a retaining vessel through which fluids flow.