A crude acrylic acid-containing liquid containing acrylic acid is distilled in a distillation column to obtain a condensate of acrylic acid having an acrylic acid purity of 90% or more, and an oxygen-containing gas (air) containing oxygen is supplied to the condensate of acrylic acid in a reflux tank for receiving the condensate of acrylic acid. The present invention can efficiently produce high purity (meth)acrylic acid by preventing formation of a polymerized product of (meth)acrylic acid in the condensate obtained in production of high purity (meth)acrylic acid through distillation.
Synthesis, chemical characterization and cancer cell growth-inhibitory activities of Cu(<scp>ii</scp>) and Ru(<scp>iii</scp>) aliphatic and aromatic dithiocarbamato complexes
cyclic amines (aliphatic or aromatic). Several techniques including elemental analysis, X-ray crystallography, ESI-MS, 1H-NMR spectroscopy, FT-IR and UV-Vis spectrophotometry were used to characterize the compounds, which highlighted the different electronic behaviors generated by the substituents within the DTC moiety. Moreover, the synthesized compounds were tested for their stability in order to investigate
HANDLING DEVICE AND PRODUCING SYSTEM OF EASY-TO-POLYMERIZE COMPOUND
申请人:MITSUBISHI CHEMICAL CORPORATION
公开号:EP1748037A1
公开(公告)日:2007-01-31
A condenser (20) includes: a top face of a tube plate (33) on which acrylic acid may be condensed inside the condenser (20); a spray (35) for spreading a polymerization inhibitor on the tube plate (33); a first polymerization inhibitor supply tube (28) for supplying the polymerization inhibitor to the spray (35); and a supporter (36) for supporting the spray (35) at a predetermined position. The supporter (36) supports the first polymerization inhibitor supply tube (28) outside the condenser (20). The present invention allows a stable continuous operation of an apparatus having a condenser for a long period of time by preventing polymerization of an easily polymerizable compound in the condenser into which a vapor of an easily polymerizable compound is supplied with a simple structure thereof.
Purohit, K. M.; Rao, D. V. Ramana, Journal of the Indian Chemical Society, 1980, vol. 57, p. 363 - 364
作者:Purohit, K. M.、Rao, D. V. Ramana
DOI:——
日期:——
Handling Device and Producing System of Easy-to-Polymerize Compound
申请人:Yada Shuhei
公开号:US20080271984A1
公开(公告)日:2008-11-06
A condenser includes: a top face of a tube plate on which acrylic acid may be condensed inside the condenser; a spray for spreading a polymerization inhibitor on the tube plate; a first polymerization inhibitor supply tube for supplying the polymerization inhibitor to the spray; and a supporter for supporting the spray at a predetermined position. The supporter supports the first polymerization inhibitor supply tube outside the condenser. The condenser allows a stable continuous operation for a long period of time by preventing polymerization of an easily polymerizable compound in the condenser into which a vapor of an easily polymerizable compound is supplied with a simple structure thereof.