C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 323/22 (2006.01) C07C 319/26 (2006.01) C07D 307/46 (2006.01) C09K 15/12 (2006.01) G06F 3/033 (2006.01)
Patent
CA 2103796
2103796 9313059 PCTABS00024 This invention relates to a stabilizing composition for S-substituted aldehydes with general formula (I) having 4-15 carbon atoms, where: R1 = C1-C5 alkyl, C6-C9 aryl, furfuryl, benzyl; R2 = H, R1; R3 = H, R1, characterized by the fact that it is based on a prototropic agent (A) in association with an 02 abstracting agent (B). The components are selected among: (A) aromatic or heterocyclic aromatic amines, such as pyridine, dimethylaniline, quinoline, etc., alcanolamines or non-aromatic cyclic amines, such as triethanolamine, N-methylmorpholine, etc., lactams, such as N-methyl pyrrolidone, etc. (B) substituted phenols or hydroquinones, such as p-t-butyl phenol, BHT, etc., acid or unsaturated antioxidant agents, as ascorbic acid or beta-carotene. The amount indicated of said composition is 500-1000 ppm, preferably 1000 ppm, and the (A)/(B) molar ratio is comprised between 5/95 and 50/50. The process for stabilizing S-substituted aldehydes provides for addition to the stabilizing composition to an aldehyde containing up to 300 ppm of water at a stabilization temperature of up to 50 ·C. The temperature so which the aldehyde is subjected in the stabilization process is 25-100 ·C, and the aldehydes may be in contact with carbon steel. The proposed (A)/(B) composition is efficient to stabilize aldehyde with a certain amount of H20 in the presence of carbon steel and at a 25-100 ·C temperature.
Fabi Marino T.
Moretti Jose C.
Fabi Marino T.
Moretti Jose C.
Rhodia S/a.
Robic
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