Method for producing H2O2 with Pa catalytic agent in working solution containing three solvents

Abstract

The invention provides a method for producing H2O2 with Pa (palladium) catalytic agent in a working solution containing three solvents. The method comprises the following steps: feeding the catalytic agent to a fixed bed reactor; feeding the working solution composed of HTA (hydrogenated terpene alcohol), TOP (trioctyl phosphate) and AR (Heavy aromatics) to the reactor in a proportion by volume of (10-2):(10-20):(65-75) in the presence of N2 which is used as a shielding gas; introducing hydrogen gas with a purity of 98% to 99.8% from the bottom of the reactor; allowing hydrogenation reaction to take place at a temperature of 60 to 80 DEG C; recycling hydrogen gas from the top of the reactor; discharging 8 g / L to 9 g / L hydrogenation liquid from the bottom of the reactor and cooling down to40 to 50 DEG C; separating N2, CH4 and other gases under reduced pressure and then pumping the hydrogenation liquid to an oxidation tower through the top of the oxidation tower; allowing oxidation reaction to take place in the air at the bottom of the tower; pumping the resulting oxidation liquid to an extraction tower through the bottom of the extraction tower; extracting with the deionized water from the top of the extraction tower with an extraction partition coefficient of about 74, to obtain 35% to 50 wt% H2O2. The yield is increased by 15% to 30% as compared with the palladium catalyticagent process in the prior art.

Description

technical field [0001] The invention belongs to H 2 o 2 The production method, specifically relates to a kind of Pa catalyst under the working liquid that three-component solvent forms to produce H 2 o 2 Methods. Background technique [0002] Currently domestic and foreign production of H 2 o 2 Mainly contain anthraquinone method, when this method produces hydrogen peroxide, hydroanthraquinone (HEAQ) usually adopts hydroterpineol (HTA) or trioctyl phosphate (TOP) as solvent, and anthraquinone (EAQ) usually adopts heavy aromatic hydrocarbon ( AR) is the solvent. In industry, the working fluid composed of HTA and AR produces H 2 o 2 When using Ni catalyst for hydrogenation, the hydrogenation efficiency is very high, which can reach 10g / L-12g / L, but the extraction partition coefficient is 33, the viscosity is high and the yield is low. If the working solution composed of TOP and AR is used to produce H 2 When O2 is used, Pa catalyst is used for hydrogenation, and its ...

AI Technical Summary

Problems solved by technology

If the working solution composed of TOP and AR is used to produce H 2 When O2 is used, Pa catalyst is used for hydrogenation, and its hydrogenation efficiency is as low as 6g / L-7g / L, while the extraction partition coefficient is 64 and the viscosity is small

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