Donald Paul Butterworth

US Patent:

42697077, May 26, 1981

Filed:

Nov 13, 1979

Appl. No.:

6/093245

Inventors:

Donald J. Butterworth - Stirling NJ
Christopher Halbfoster - Clark NJ
Robert Loudon - Howell NJ

Assignee:

Ecodyne Corp. - Chicago IL

International Classification:

B01D 3702

US Classification:

210777

Abstract:

A filter element having a perforated tubular core and a plurality of layers of strand material wound about the tubular core. The outermost layer has the ability to retain particles smaller than those retained by the innermost layer. The size range of particles retained by the outermost layer is from one to twenty-five microns and the size range of particles retained by the innermost layer is from twenty-five to one hundred microns. According to the method of invention, the filter element is used to purify liquids through the steps of precoating, delivering liquid through the filter, periodically backwashing the filter, and precoating the filter again.

US Patent:

41168402, Sep 26, 1978

Filed:

Aug 12, 1977

Appl. No.:

5/824005

Inventors:

Donald James Butterworth - Stirling NJ

Assignee:

Ecodyne Corporation - Lincolnshire IL

International Classification:

B01D 2310

US Classification:

210279

Abstract:

A liquid distribution pipe in liquid treatment apparatus is divided into two separate liquid distribution sections. Each pipe section fits into a separate nozzle on the surface of the apparatus and is independent of the other pipe section. Each section of liquid distribution pipe can be isolated from all other sections, and can supply or withdraw liquid from the apparatus independent of the other sections.

US Patent:

47072571, Nov 17, 1987

Filed:

May 29, 1986

Appl. No.:

6/868649

Inventors:

Thomas A. Davis - Annandale NJ
Kurt Bozenmayer - West Milford NJ
Donald J. Butterworth - Stirling NJ

Assignee:

The Graver Company - Union NJ

International Classification:

B01D 2324

US Classification:

210274

Abstract:

An air/water distributor underdrain assembly for providing a uniform distribution and metering of backwash air and/or water through a filter bed. The distributor assembly includes a distributor member which defines a distributor chamber for receipt of backwash air and/or water thereinto. A plurality of first and second spaced apart openings extend through the distributor member. A shroud extends downwardly into the distributor chamber from each of the first openings in fluid communication with an intermediate portion of the distributor chamber for directing backwash water therethrough. Backwash air collected in a gas compartment formed in an upper portion of the distributor chamber is directed through the second openings.

US Patent:

52501590, Oct 5, 1993

Filed:

Jun 12, 1991

Appl. No.:

7/713809

Inventors:

Donald J. Butterworth - Stirling NJ

Assignee:

The Graver Company - Union NJ

International Classification:

B01D 6144

US Classification:

204 98

Abstract:

A method and bipolar membrane stack for the generation of acid and alkali metal base solutions from an impure salt by electrodialysis. The unit cells of the stack comprise a novel arrangement of cation-selective membranes and an anion selective membrane with relation to a bipolar membrane forming four liquid flow channels. One of the cation-selective membranes is monocation-selective, passing monovalent cations while blocking the passage of multivalent cations. The method is operable continuously using untreated raw material brines contaminated with multivalent cation salts to generate substantially pure alkali metal base solutions.

US Patent:

42105374, Jul 1, 1980

Filed:

Sep 18, 1978

Appl. No.:

5/943404

Inventors:

Donald J. Butterworth - Stirling NJ
Leo F. Ryan - Bridgewater NJ

Assignee:

Ecodyne Corporation - Lincolnshire IL

International Classification:

B01D 2700
B01D 2900

US Classification:

210323T

Abstract:

A liquid precoat filter has a multitude of elongated replaceable filter elements that have one of their ends supported on tubes that project upwardly from a tube sheet. A multi-component, spring-biased, sliding seal prevents leakage between the filter elements and their support tubes. Externally engageable connectors are used to releasably fasten the filter elements to their tubes.

US Patent:

52078795, May 4, 1993

Filed:

Mar 11, 1991

Appl. No.:

7/667542

Inventors:

Donald J. Butterworth - Stirling NJ

Assignee:

The Graver Company - Union NJ

International Classification:

B01D 6100

US Classification:

2041824

Abstract:

A method and bipolar membrane stack for the generation of acid and base solutions from a salt by electrodialysis. The unit cells of the stack comprise a novel arrangement of membranes which provide four liquid flow channels. One of the channels has circulating therein a multivalent acid solution which acts as a buffer and presents leakage of the salt anion through the bipolar membrane, thereby producing base solution of substantially reduced salt-anion contamination. The method can be operated on a continuous basis.

US Patent:

41742826, Nov 13, 1979

Filed:

Sep 18, 1978

Appl. No.:

5/943403

Inventors:

Donald J. Butterworth - Stirling NJ

Assignee:

Ecodyne Corporation - Lincolnshire IL

International Classification:

B01D 2916

US Classification:

210 232

Abstract:

A liquid precoat filter has a multitude of elongated replaceable filter elements that have one of their ends supported on tubes that project upwardly from a tube sheet. The individual filter elements are releasably connected to the tubes by couplings that permit a spring clip to lock under shoulders when the filter element is pushed down; the spring clip is released when the filter element is rotated about one-quarter of a turn. A sliding seal prevents leakage between the filter elements and their support tubes.

US Patent:

48805130, Nov 14, 1989

Filed:

Jun 20, 1986

Appl. No.:

6/876911

Inventors:

Thomas A. Davis - Annandale NJ
Donald J. Butterworth - Stirling NJ

Assignee:

The Graver Company - Union NJ

International Classification:

B61D 1506
B61D 1302
C02F 1342

US Classification:

2041824

Abstract:

A method and apparatus for generating acid and base regenerant solutions by utilization of a bipolar membrane electrodialysis stack. A mineral-containing salt solution is continuously circulated through the stack to produce a partially demineralized salt solution, an acid solution and a base solution. The acid solution and base solution are continuously circulated through the stack to increase the concentration thereof. The circulating salt solution is controlled to maintain the salt concentration in the range of 2% to 25% and the pH in the range of 8-11. The concentrations of the circulating acid solution and base solution are controlled to maintain the concentrations thereof in the range of 0. 2N to 3. 0N. The concentrated acid solution and base solution are utilized to regenerate exhausted ion-exchange resins.