초록 ▼

The present invention is a method of stabilizing hydrogen peroxide in an aqueous solution, such as a circulating water slurry, comprising a peroxide, such as hydrogen peroxide. The aqueous solution may include organic matter. The method comprises adding an aldehyde donor, such as a methylolhydantoin

The present invention is a method of stabilizing hydrogen peroxide in an aqueous solution, such as a circulating water slurry, comprising a peroxide, such as hydrogen peroxide. The aqueous solution may include organic matter. The method comprises adding an aldehyde donor, such as a methylolhydantoin, to the solution (or slurry). The inventors have discovered that aldehyde donors significantly reduce the decomposition of hydrogen peroxide by catalase and other peroxide decomposing enzymes, which are often present in recycled paper. As a result, less hydrogen peroxide needs to be added to a solution to effectively bleach organic matter in the solution. Furthermore, aldehyde donors are safe to handle and cost effective. Another embodiment is a method of bleaching recycled papers in a circulating water slurry comprising organic matter. The method comprises adding hydrogen peroxide and an aldehyde donor to the slurry. Yet another embodiment is a method of inhibiting catalase and/or other peroxide decomposing enzymes in an aqueous solution, such as a circulating water slurry, comprising adding an aldehyde donor to the aqueous solution.

대표청구항 ▼

The present invention is a method of stabilizing hydrogen peroxide in an aqueous solution, such as a circulating water slurry, comprising a peroxide, such as hydrogen peroxide. The aqueous solution may include organic matter. The method comprises adding an aldehyde donor, such as a methylolhydantoin

The present invention is a method of stabilizing hydrogen peroxide in an aqueous solution, such as a circulating water slurry, comprising a peroxide, such as hydrogen peroxide. The aqueous solution may include organic matter. The method comprises adding an aldehyde donor, such as a methylolhydantoin, to the solution (or slurry). The inventors have discovered that aldehyde donors significantly reduce the decomposition of hydrogen peroxide by catalase and other peroxide decomposing enzymes, which are often present in recycled paper. As a result, less hydrogen peroxide needs to be added to a solution to effectively bleach organic matter in the solution. Furthermore, aldehyde donors are safe to handle and cost effective. Another embodiment is a method of bleaching recycled papers in a circulating water slurry comprising organic matter. The method comprises adding hydrogen peroxide and an aldehyde donor to the slurry. Yet another embodiment is a method of inhibiting catalase and/or other peroxide decomposing enzymes in an aqueous solution, such as a circulating water slurry, comprising adding an aldehyde donor to the aqueous solution. t al., 514/399; US-5622722, 19970400, Knott et al., 424/494; US-5624932, 19970400, Qin et al., 514/282; US-5633259, 19970500, Qin et al., 514/282; US-5639476, 19970600, Oshlack et al., 424/468; US-5656295, 19970800, Oshlack et al., 424/468; US-5670172, 19970900, Buxton et al., 424/495; US-5672360, 19970900, Sackler et al., 424/490; US-5681585, 19971000, Oshlack et al., 424/494; US-5763452, 19980600, Miller et al., 514/282; US-5767125, 19980600, Crain et al., 514/282; US-5780479, 19980700, Kim, 514/282; US-5811126, 19980900, Krishnamurthy, 424/498; US-5834477, 19981100, Mioduszewski, 514/282; US-5843480, 19981200, Miller et al., 424/484; US-5849240, 19981200, Miller et al., 264/460; US-5858017, 19990100, Demopulos et al., 604/890.1; US-5860950, 19990100, Demopulos et al., 604/049; US-5866164, 19990200, Kuczynski et al., 424/472; US-5869097, 19990200, Wong et al., 424/473; US-5879705, 19990300, Heafield et al., 424/464; US-5880132, 19990300, Hill, 514/282; US-5891471, 19990400, Miller et al., 424/468; US-5908848, 19990600, Miller et al., 514/282; US-5942241, 19990800, Chasin et al., 424/426; US-5958452, 19990900, Oshlack et al., 424/457; US-5958459, 19990900, Chasin et al., 424/490; US-5965161, 19991000, Oshlack et al., 424/457; US-5965163, 19991000, Miller et al., 424/468; US-5968547, 19991000, Reder et al., 424/449; US-5968551, 19991000, Oshlack et al., 424/456; US-5972954, 19991000, Foss, 514/282; US-5998434, 19991200, Mitch et al., 514/210.16; US-6024982, 20000200, Oshlack et al., 424/476; US-6068855, 20000500, Leslie et al., 424/468; US-6077532, 20000600, Malkowska et al., 424/457; US-6077533, 20000600, Oshlack et al., 424/461; US-6103258, 20000800, Simon, 424/449; US-6103261, 20000800, Chasin et al., 424/459; US-6143322, 20001100, Sackler et al., 424/459; US-6143328, 20001100, Heafield et al., 424/489; US-6162467, 20001200, Miller et al., 424/468; US-6210714, 20010400, Oshlack et al., 424/476; US-6228863, 20010500, Palermo et al., 514/282; US-6254887, 20010700, Miller et al., 424/468; US-6261599, 20010700, Oshlack et al., 424/457; US-6277384, 20010800, Kaiko et al., 424/400; US-6294195, 20010900, Oshlack et al., 424/457; US-6306438, 20011000, Oshlack et al., 424/468; US-6326027, 20011200, Miller et al., 424/468; US-6335033, 20020100, Oshlack et al., 424/457; US-6375957, 20020400, Kaiko et al., 424/400; US-6387404, 20020500, Oshlack et al., 424/480; US-6399096, 20020600, Miller et al., 424/464; US-6475494, 20021100, Kaiko et al., 424/400