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Bio-Sourced Epoxy Monomers and Polymers
Published in A. Pizzi, K. L. Mittal, Handbook of Adhesive Technology, 2017
Sylvain Caillol, Bernard Boutevin, Jean-Pierre Pascault
The three VN derivatives chosen were in different oxidation states, either oxidized or reduced. It is worth noting that methoxyhydroquinone was prepared through a green VN oxidation process leading to the loss of one carbon atom. Briefly, VN was subjected to a Dakin oxidation with sodium percarbonate as an environmentally friendly oxidant in a THF–water mixture at room temperature. Sodium percarbonate is a chemical commonly used in laundry detergents. It is a good alternative to hydrogen peroxide, the storage and transportation of which is difficult for safety reasons. In contrast, sodium percarbonate is an environmentally friendly solid compound composed of sodium carbonate and hydrogen peroxide. It is a powerful oxidant, while being cheap, nontoxic, stable in storage, and easily handled.
World Water Crisis and Climate Change: Water Renovation and Recycling
Published in Stanley Manahan, Environmental Chemistry, 2017
Another oxidant that is becoming widely used as a cleaning and bleaching agent in detergents and that, because of its oxidizing ability from the release of hydrogen peroxide in water, has disinfecting abilities as well, is sodium percarbonate. This solid, commonly called percarbonate, is produced by mixing hydrogen peroxide, H2O2, with sodium carbonate, Na2CO3, along with MgSO4 and Na2SiO3 stabilizers to produce a stable solid with an approximate empirical formula of Na2CO3•3H2O2 in which the H2O2 may be stabilized by hydrogen bonding to CO32− ion. In water, this material releases oxygen and acts as a bleaching agent, detergent booster, and probably bactericide as well.
World Water Crisis and Climate Change
Published in Stanley E. Manahan, Environmental Chemistry, 2022
Another oxidant that is becoming widely used as a cleaning and bleaching agent in detergents and that, because of its oxidizing ability from the release of hydrogen peroxide in water, has disinfecting abilities as well, is sodium percarbonate. This solid, commonly called percarbonate, is produced by mixing hydrogen peroxide, H2O2 , with sodium carbonate, Na2CO3 , along with MgSO4 and Na2SiO3 stabilizers to produce a stable solid with an approximate empirical formula of Na2CO3•3H2O2 in which the H2O2 may be stabilized by hydrogen bonding to CO32-. In water, this material releases oxygen and acts as a bleaching agent, detergent booster, and bactericide. It is a key ingredient of several laundry bleachers and boosters such as OxiClean. Placed in water, sodium percarbonate first releases hydrogen peroxide, itself an effective bleaching agent and bactericide, which further breaks down to molecular oxygen as shown by the reactions: Na2CO3•3H2O2→3H2O2+2Na++CO32–2H2O2→2H2O+O2
Optimization of sodium percarbonate pretreatment for improving 2,3-butanediol production from corncob
Published in Preparative Biochemistry and Biotechnology, 2018
Lijuan Ma, Qing Ma, Gaojie Guo, Liping Du, Yingying Zhang, Youzhi Cui, Dongguang Xiao
Sodium percarbonate (SP) is a strong oxidant of environmental friendly, nontoxic, safe, cheap, and easy to get. It is composed of sodium carbonate and hydrogen peroxide with linkages of hydrogen bonds. It can break down and produce oxygen, water, and sodium carbonate. Thus, the waste liquid after SP pretreatment is easy to handle and is environmental friendly. SP is widely used in blench, disinfectants for food and health care, metal surface treatment.[11,12] In alkaline solution, H2O2 dissociates into highly reactive hydroxyl (OH−) and superoxide () radicals. These species contribute to oxidative delignification by attacking lignin side chains.[13,14] Thus, SP possibly has the ability of oxygen delignification and carbohydrate retention on lignocellulosic biomass under mild condition. But so far, there is rare report on using SP to pretreat lignocellulose. SP was only reported by Nakashina et al. in the pretreatment of corn stover, and the combination of SP with ultrasound could obtain higher yield of reducing sugar than SP only.[15] Ultrasound was considered to play the main role in the structure damage of corn stover in that research and detailed study on SP pretreatment as well as the optimization had yet carried out. But the use of ultrasound is energy consuming and difficult to be used in a large scale.