Tetraacetylethylenediamine

The synthesis of 1,3,5,7-tetranitroadamantane (104) from 1,3,5,7-tetraaminoadamantane (103) has been improved upon by the use of dimethyldioxirane (91 %), and also, by using a mixture of sodium percarbonate and A,A,iV, iV -tetraacetylethylenediamine in a biphasic solvent system, followed by treating the crude product with ozone (91 %) the latter involving the in situ generation of peroxyacetic acid. 

Peracetic acid or its anion, produced in situ from A, A, A, A -tetraacetylethylenediamine, in the presence of hydrogen peroxide, in slightly alkaline solution (equation 14), is an effective bleaching agent used in pulp manufacture and laundering. Household washing solution formulations contain perborate and activators that produce peracetic acid of bleaching effect . ... 

Laundry powders in Europe use sodium percarbonate and a bleach activator, tetraacetylethylenediamine ( ED), to form peracetic acid in the washing machine that then reacts with bleachable stains such as tea, red wine, coffee, and curry to remove /bleach them from cloth. Transition metal ions, in particular copper, cause first decomposition of peracetic add before it can bleach stains and second react with peroxide to form highly readive hydroxyl radicals that can cause dye and fabric damage [32]. Chelants bind with copper and other metals to prevent these unwanted side readions. 

Peracid Precursor Systems. Compounds that can form peracids by perhydrolysis are almost exclusively amide, imides, esters, or anhydrides (85). Two compounds were commercially used for laundry bleaching as of 1990. Tetraacetylethylenediamine (TAED) [10543-57-4] is utilized in over 50% of Western European detergents (5). The perhydrolysis reaction of this compound is shown in equation 19. TAED generates two moles of peracid and one mole of diacetylethylenediamine per mole of imide (93). 

Tetraacetylethylenediamine (T AFP) perborate activator production has been estimated by industry sources to be 54,000 t to 63,600 t per year as of 1990. The production is located solely in Western Europe where the product is consumed. No estimates of the perborate activator nonanoyloxybenzene sulfonate production volumes are available because it is captive chemical of the Procter Gamble Co. 

Zeolite A 30.0 Sodium metasilicate pentahydrate 5.0 Magnesium silicate 1.0 Sodium perborate tetrahydrate 25.0 Tetraacetylethylenediamine (TAED) 3.0 Sodium carbonate 15.0 Carboxymethyl cellulose 1.5 Sodium sulphate light, enzymes to 100... 

Tetraacetylethylenediamine (TAED) and pentaacetylglucose (PAG) are employed as bleach pre-cursors of peracetic acid this allows the bleach to occur at a temperature lower than when hydrogen peroxide is used. Perhydro-lysis of the sulfonated aromatic ester, shown in Figure 2.38, gives superb bleach performance on textiles, probably due to the surface active properties of the compound. The acyl dialkyphosphates and the N-acylimidazoles are also effective peracetic acid precursors at low temperature. 

As standard detergent solution [20] the washing machine test detergent was used in the concentration 19.25 g basic powder, 5 g perborate-tetrahydrate, and 0.75 g activator tetraacetylethylenediamine per liter of distilled water. This corresponds to an overall surfactant concentration of 2.7 g/L. 

N,N,N, N -Tetraacetylethylenediamine s. under Na2C0 2H202 Trifluoroacetic anhydride s. under NH NOr ... 

Bleach activators Help the action of perborate at lower temperatures Tetraacetylethylenediamine (TAED) ... 

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