Cleaning and liquid contact with solids – Processes – Hollow work – internal surface treatment
Reexamination Certificate
2006-07-11
2006-07-11
Del Cotto, Gregory R. (Department: 1751)
Cleaning and liquid contact with solids
Processes
Hollow work, internal surface treatment
C134S022140, C134S022180, C134S022190, C134S028000, C134S042000, C510S188000, C510S218000, C510S219000, C510S234000, C510S253000, C510S254000, C510S499000, C510S501000
Reexamination Certificate
active
07073519
ABSTRACT:
The present invention relates to a facility parts cleaning solution for the processing of (meth)acrylic acid and/or (meth)acrylic esters and a cleaning method using the cleaning solution. An aqueous cleaning composition comprising 5 to 50 wt % of at least one alkali metal hydroxide selected from the group consisting of sodium hydroxide and potassium hydroxide, 0.01 to 1 wt % of a water-soluble amino acid, 0.001 to 0.05 wt % of N,N′-methylene bisacrylamide, and 0.001 to 0.05 wt % of azobisisobutyronitrile is used to clean facility parts for manufacturing (meth)acrylic acid and/or (meth)acrylic esters in order to easily remove polymers and deposits.
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Choi Seok-Hwan
Ha Kyoung-Su
Kang Seong-Pil
Kim Geon-Yong
Woo Boo-Gon
Birch & Stewart Kolasch & Birch, LLP
Del Cotto Gregory R.
LG Chem Ltd.
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