Synthesis and evaluation of 3-acyltetronic acid-containing metal complexing agents
摘要:
Potential metal chelators containing one or several acyltetronic acid moieties were prepared from cyclic or acyclic amines and polyamines, and from bis(phenols) by reaction with 1-4 equiv of 3-bromoacetyltetronic acid in the presence of potassium carbonate. The affinity constants of the chelating agents for toxic metallic cations Cd2+, Cs+, and Pb2+ and for dimethylarsinic acid were measured, at pH 7.5 and 9.3. Compound 4, an acyclic triamine containing four acyltetronic moieties, was found to complex efficiently all the tested species. (C) 2013 Elsevier Ltd. All rights reserved.
Synthesis and evaluation of 3-acyltetronic acid-containing metal complexing agents
摘要:
Potential metal chelators containing one or several acyltetronic acid moieties were prepared from cyclic or acyclic amines and polyamines, and from bis(phenols) by reaction with 1-4 equiv of 3-bromoacetyltetronic acid in the presence of potassium carbonate. The affinity constants of the chelating agents for toxic metallic cations Cd2+, Cs+, and Pb2+ and for dimethylarsinic acid were measured, at pH 7.5 and 9.3. Compound 4, an acyclic triamine containing four acyltetronic moieties, was found to complex efficiently all the tested species. (C) 2013 Elsevier Ltd. All rights reserved.
Acyclic mononuclear and macrocyclic dinuclear silver(I) complexes of Schiff base ligands derived from N,N-bis(2-aminoalkyl)-2-phenylethylamines
作者:David.E. Fenton、Paul C. Hellier
DOI:10.1016/s0020-1693(00)92401-0
日期:1992.8
mononuclear and macrocyclic dinuclear silver(I) complexes of ligands derived from the Schiffbase condensation of N, N-bis(2-aminoalkyl)-2-phenylethylamines with 2,6-diacetylpyridine are reported and discussed. It is noted that changing the 2-aminoalkyl groups of the alkylamines from ethyl to n-propyl provides a change from an acyclic mononuclear silver(I) compound to a macrocyclic dinuclear silver(I) compound
Alkaline cleaning composition and methods for removing lipstick
申请人:Ecolab USA Inc.
公开号:US10954476B2
公开(公告)日:2021-03-23
Methods of cleaning waxy, oily and/or greasy soils, including lipsticks and lip gloss, are disclosed. Methods of removing lipstick and lip gloss stains in warewash and laundry applications are disclosed through application of cleaning compositions comprising long chain polyamines, namely C6-C20 polyamines having between 1 and 5 nitrogens. In some aspects alkaline cleaning compositions comprise sodium hydroxide detergents and a C6-C20 polyamines such as N1-(3-aminopropyl)-N3-dodecylpropane-1,3,diamine) and/or N1,N1,N3-tris(3-aminopropyl)-N3-dodecylpropane-1,3-diamine.
ALKALINE CLEANING COMPOSITION AND METHODS FOR REMOVING LIPSTICK
申请人:Ecolab USA Inc.
公开号:US20190136155A1
公开(公告)日:2019-05-09
Methods of cleaning waxy, oily and/or greasy soils, including lipsticks and lip gloss, are disclosed. Methods of removing lipstick and lip gloss stains in warewash and laundry applications are disclosed through application of cleaning compositions comprising long chain polyamines, namely C6-C20 polyamines having between 1 and 5 nitrogens. In some aspects alkaline cleaning compositions comprise sodium hydroxide detergents and a C6-C20 polyamines such as N1-(3-aminopropyl)-N3-dodecylpropane-1,3,diamine) and/or N1,N1,N3-tris(3-aminopropyl)-N3-dodecylpropane-1,3-diamine.