Introduction: Working solvents system is one of the key issues for hydrogen peroxide synthesis via AO process. Presently, solvents used in AO process have most advantageously been two components in which one, usually a hydrocarbon type, is present primarily to dissolve the anthraquinone and the other is present to dissolve the hydroquinone. Since its limited capacity and relative soluble in water, contaminations have become the hot issues as the solvents system is not used sparingly. Herein, we report a superior solvents system for the hydrogen peroxide production. Methods: Novel solvents were synthesized and employed as one component in the working solvents system with the formula presented in Image 1, in which R1, R2, R3, R4 and R5 are alkyl groups having one to eight carbon atoms. This solvent may be used alone or admixed with aromatic hydrocarbons. Most preferably, mixtures of 10 to 35 percent by weight of this solvent with 65 to 90 percent of hydrocarbon solvent, an alkylbenzenes or a mixture of alkylbenzene derivatives are preferred. Results: Performance of novel solvents system was evaluated in various ratios of Hi-Sol (a mixture of alkylbenzene derivatives having C3 to C4 alkyl groups) and tetra-propyl-butyl diamide(TPBMA) or tetra-butyl-heptyl diamide(TBHMA). The solubility was determined by dissolving the weighted quantity of the quinone in 100 ml of the solvent mixture at 298K under 0.1MPa. After addition of 1 percent Pd/Al2O3 catalyst to each solution, the mixture was hydrogenated at 328K under 0.3 MPa until hydrogen uptakes ceased. The solubility results and hydrogen peroxide yields in each case were outlined in the Image 2. Conclusions: Working efficiency of solution system has been improved via novel working solvents system, which exists a good solubility both for quinone and hydroquinone with significant hydrogen peroxide yields.

Novel working solvents system for alkylated anthraquinone and anthrahydroquinone: Applications in hydrogen peroxide synthesis

2019 Spring National Meeting

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