Timothy Keyes from Logan, OH, age 61

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Location:

United States

Method Of Removing Iron Contaminants From Liquid Streams During The Manufacture And/Or Purification Of Aromatic Acids
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US Patent:

20040044246, Mar 4, 2004
Filed:

Apr 22, 2003
Appl. No.:

10/420092
Inventors:

Phillip Nubel - Naperville IL, US
Timothy Keyes - Charleston SC, US
Ricky Wittman - Aurora IL, US
International Classification:

C07C051/255
C07C051/16
US Classification:

562/414000
Abstract:

This invention relates to control or removal of amounts of dissolved iron that may be present in liquid process streams in the manufacture of aromatic acids. The present invention further relates to the control or removal of dissolved iron contaminants present in liquid streams during the manufacture of a crude aromatic acid. The present invention also further relates to the control or removal of dissolved iron contaminants present in liquid streams during the purification of a crude aromatic acid. The present invention also further relates to controlling of decreasing the formation of iron oxides on the surfaces of equipment used during the manufacture of crude aromatic acid and/or purification of crude aromatic acid.

Solids-Liquid Separation Processes
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US Patent:

20220380287, Dec 1, 2022
Filed:

Oct 30, 2020
Appl. No.:

17/772271
Inventors:

- Naperville IL, US
Timothy H. Keyes - Naperville IL, US
International Classification:

C07C 51/47
C07C 51/265
C07C 51/43
Abstract:

The present disclosure relates generally to solid/liquid separation processes. One aspect of the disclosure is a process including filtering a solid/liquid mixture comprising a solid crude aromatic carboxylic acid, a monocarboxylic acid solvent, and minor amounts of an oxidation catalyst in a feed zone of a rotary filter (e.g., a rotary pressure filter), the feed zone having at least two filter zones to form a first feed filtrate comprising monocarboxylic acid solvent and solids; and a second feed filtrate separate from the first feed filtrate, the second feed filtrate comprising monocarboxylic acid solvent and solids, the second feed filtrate being lower in solids than the first feed filtrate; and transferring at least a portion of the first feed filtrate to the reactor zone as recycle.