| abstract |
FIELD: chemistry. n SUBSTANCE: aqueous membrane cleaning composition comprising an alkoxylated non-ionogenic surfactant having the following formula is described: n n n n where R is a linear or branched C 8 -C 18 hydrocarbon chain, X is O or N, R 1 , R 2 and R 3 independently of one another are hydrogen, methyl, ethyl, propyl, isopropyl, or a mixture thereof, n is from 1 to 8, m has a value of 1 to 8, p is a value of 0 to 8, where X is O, then w is a number 1, and if X is N, then w is a number 2, a surfactant having an HLBd value of 9 to 12.5, and an average degree of branching BS≥1.5. n EFFECT: effective cleaning in aqueous solutions used for cleaning membranes. n 15 cl, 13 dwg, 11 tbl |