David H Slinkman, 6020 Donneybrook Ln, Collegeville, PA 19426
David Slinkman Phones & Addresses
20 Donneybrook Ln, Collegeville, PA 19426
Newtown Square, PA
1158 Michelle Ln, Lombard, IL 60148 630-6204968
Ann Arbor, MI
Carol Stream, IL
20 Donneybrook Ln, Collegeville, PA 19426 630-2928180
Work
Position:
Service Occupations
Education
Degree:
Bachelor's degree or higher
Mentions for David H Slinkman
Publications & IP owners
Us Patents
Composition And Method For Improved Aluminum Hydroxide Production
US Patent:
7976820, Jul 12, 2011
Filed:
May 15, 2006
Appl. No.:
11/434490
Inventors:
Jianjun Liu - Aurora IL, US
James A Counter - Thirroul, AU
Dmitri L Kouznetsov - Aurora IL, US
David H Slinkman - Lombard IL, US
James A Counter - Thirroul, AU
Dmitri L Kouznetsov - Aurora IL, US
David H Slinkman - Lombard IL, US
Assignee:
Nalco Company - Naperville IL
International Classification:
C01F 7/34
US Classification:
423629, 423111, 423127
Abstract:
An improved method and composition for producing aluminum hydroxide crystals in a Bayer process pregnant liquor, involve the addition of an emulsified crystallization modifier comprising a C-Cfatty acid, precursors, salts or blends thereof. The alkyl chain of the fatty acid crystallization modifier is free of functional groups. The modifier yields a commercially viable product in the presence and absence of a hydrocarbon oil which dissolves the fatty acid. Further, the modifier, prepared in either an emulsified form or as a fatty acid neat, facilitates formation of oxalate aggregates greater than 200 μm which may be readily screened out with minimum trihydrate loss.
Composition And Method For Improved Aluminum Hydroxide Production
US Patent:
7976821, Jul 12, 2011
Filed:
Dec 18, 2006
Appl. No.:
11/612031
Inventors:
Jianjun Liu - Aurora IL, US
James A Counter - Thirroul, AU
Dmitri L Kouznetsov - Aurora IL, US
David H Slinkman - Lombard IL, US
James A Counter - Thirroul, AU
Dmitri L Kouznetsov - Aurora IL, US
David H Slinkman - Lombard IL, US
Assignee:
Nalco Company - Naperville IL
International Classification:
C01F 7/34
US Classification:
423629, 423111, 423127
Abstract:
An improved method and composition for producing aluminum hydroxide crystals from precipitation liquor, involves the addition of an emulsified crystal growth modifier comprising a C-Cfatty acid, precursors, salts or blends thereof. The emulsified crystal growth modifier also facilitates an upward shift in particle size distribution of aluminum hydroxide and an upward shift in oxalate ball size.
Approach In Controlling Dsp Scale In Bayer Process
US Patent:
8029752, Oct 4, 2011
Filed:
Apr 6, 2009
Appl. No.:
12/418988
Inventors:
Timothy La - Kardinya WA, US
Ji Cui - Aurora IL, US
John D. Kildea - Baldivis, AU
David H Slinkman - Lombard IL, US
Kim Richard Coleman - Naperville IL, US
Ji Cui - Aurora IL, US
John D. Kildea - Baldivis, AU
David H Slinkman - Lombard IL, US
Kim Richard Coleman - Naperville IL, US
Assignee:
Nalco Company - Naperville IL
International Classification:
C01B 33/26
US Classification:
4231181
Abstract:
The invention provides a method of controlling silica in the liquor circuit of the Bayer process. The method involves addition of a promoter material to enhance the precipitation of DSP and includes adding one or more silica dispersion materials or dry silica forms to those parts of the circuit where precipitation of DSP and removal of silica from solution is desirable; for example the desilication stage of a Bayer process plant. The removal of DSP from solution reduces silica concentration in the liquor and thereby enables better control of process issues such as silica contamination in alumina product and DSP formation in later stages of the process where precipitation as scale onto vessel walls and equipment is problematical. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process.
Reducing Aluminosilicate Scale In The Bayer Process
US Patent:
8545776, Oct 1, 2013
Filed:
Sep 25, 2009
Appl. No.:
12/567116
Inventors:
Timothy La - Kardinya, AU
Ji Cui - Aurora IL, US
John D. Kildea - Baldivis, AU
David H. Slinkman - Lombard IL, US
Ji Cui - Aurora IL, US
John D. Kildea - Baldivis, AU
David H. Slinkman - Lombard IL, US
Assignee:
Nalco Company - Naperville IL
International Classification:
C01F 7/04
C01F 1/00
C02F 1/52
C02F 5/08
B01D 21/01
C01F 1/00
C02F 1/52
C02F 5/08
B01D 21/01
US Classification:
423121, 423625, 4231181, 423122, 423127, 210702, 210705, 210723
Abstract:
The invention provides a method of inhibiting the accumulation of DSP scale in the liquor circuit of Bayer process equipment. The method includes adding one or more particular silane based small molecules to the liquor fluid circuit. These scale inhibitors reduce DSP scale formation and thereby increase fluid throughput, increase the amount of time Bayer process equipment can be operational and reduce the need for expensive and dangerous acid washes of Bayer process equipment. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process.
Method For Improved Aluminum Hydroxide Production
US Patent:
2008015, Jul 3, 2008
Filed:
Dec 29, 2006
Appl. No.:
11/618451
Inventors:
Dmitri L. Kouznetsov - Aurora IL, US
Jianjun Liu - Aurora IL, US
David H. Slinkman - Lombard IL, US
Jianjun Liu - Aurora IL, US
David H. Slinkman - Lombard IL, US
International Classification:
C01F 1/00
US Classification:
423124, 423122
Abstract:
The present invention relates ways to increase the output of a high quality product from the aluminum hydroxide recovery processes such as the Bayer process. The invention is a method of increasing the size of precipitated aluminum hydroxide while not reducing the total production amounts. The invention relates to the use of a crystal growth modifier compositions added to the precipitation liquor to increase the particle size distribution of the precipitated alumina trihydrate.
Composition And Method For Improved Aluminum Hydroxide Production
US Patent:
2011020, Aug 18, 2011
Filed:
Apr 28, 2011
Appl. No.:
13/096018
Inventors:
Jianjun Liu - Aurora IL, US
James A. Counter - Thirroul, AU
Dmitri L. Kouznetsov - Aurora IL, US
David H. Slinkman - Lombard IL, US
James A. Counter - Thirroul, AU
Dmitri L. Kouznetsov - Aurora IL, US
David H. Slinkman - Lombard IL, US
International Classification:
C01F 7/02
C09K 3/00
C09K 3/00
US Classification:
423122, 25218212
Abstract:
An improved method and composition for producing aluminum hydroxide crystals from precipitation liquor, involves the addition of an emulsified crystal growth modifier comprising a C-Cfatty acid, precursors, salts or blends thereof. The emulsified crystal growth modifier also facilitates an upward shift in particle size distribution of aluminum hydroxide and an upward shift in oxalate ball size.
Reducing Aluminosilicate Scale In The Bayer Process
US Patent:
2011021, Sep 1, 2011
Filed:
Feb 25, 2011
Appl. No.:
13/035124
Inventors:
Timothy La - Kardinya, AU
John D. Kildea - Baldivis, AU
Kevin L. O'Brien - Saint Charles IL, US
Everett C. Phillips - Batavia IL, US
Kailas B. Sawant - Aurora IL, US
David H. Slinkman - Lombard IL, US
Frederick J. Swiecinski - Algonquin IL, US
Ji Cui - Aurora IL, US
John D. Kildea - Baldivis, AU
Kevin L. O'Brien - Saint Charles IL, US
Everett C. Phillips - Batavia IL, US
Kailas B. Sawant - Aurora IL, US
David H. Slinkman - Lombard IL, US
Frederick J. Swiecinski - Algonquin IL, US
Ji Cui - Aurora IL, US
International Classification:
C01F 7/02
US Classification:
423127
Abstract:
The invention provides a method of inhibiting the accumulation of DSP scale in the liquor circuit of Bayer process equipment. The method includes adding one or more particular silane based small molecules to the liquor fluid circuit. These scale inhibitors reduce DSP scale formation and thereby increase fluid throughput, increase the amount of time Bayer process equipment can be operational and reduce the need for expensive and dangerous acid washes of Bayer process equipment. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process.
Reducing Aluminosilicate Scale In The Bayer Process
US Patent:
2013034, Dec 26, 2013
Filed:
Aug 27, 2013
Appl. No.:
14/011051
Inventors:
Ji Cui - Aurora IL, US
John D. Kildea - Baldivis, AU
David H. Slinkman - Collegeville PA, US
John D. Kildea - Baldivis, AU
David H. Slinkman - Collegeville PA, US
Assignee:
Nalco Company - Naperville IL
International Classification:
C02F 5/10
C22B 21/00
C22B 21/00
US Classification:
423127
Abstract:
The invention provides methods and compositions for inhibiting the accumulation of DSP scale in the liquor circuit of Bayer process equipment. The method includes adding one or more particular silane based small molecules to the liquor fluid circuit. These scale inhibitors reduce DSP scale formation and thereby increase fluid throughput, increase the amount of time Bayer process equipment can be operational and reduce the need for expensive and dangerous acid washes of Bayer process equipment. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process.
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