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

A technology of H2O2 and working fluid, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of low hydrogenation efficiency and low viscosity, and achieve the effect of reducing freight costs

Inactive Publication Date: 2013-06-12
王继华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0015] A Pa catalyst produces H under the working solution composed of three-component solvents 2 o 2 According to the method, the Pa catalyst is added to the fixed-bed reactor, protected with nitrogen, and then the working solution composed of HTA, TOP, AR, according to the volume ratio of HTA, TOP, AR is 10~20:10~20:65~ 75 is added in the described reactor, and the volume sum of HTA, TOP, AR is 100. The hydrogen gas with a purity of 98-99.8% is introduced from the bottom of the reactor, and the hydrogenation reaction is carried out at 60-80 ° C. The hydrogen gas from the top of the reactor is recycled through the hydrogen circulation compressor, and hydrogenated at 8g / L-9g / L The liquid comes out from the bottom of the reactor and is cooled to 40-50°C, and the N is separated under reduced pressure. 2 、CH 4 After waiting for the gas mixture, the hydrogenated liquid enters the tower from the top of the oxidation tower through a pump, and undergoes an oxidation reaction with ...

Embodiment 2

[0019] HTA: TOP: The working solution of AR=14: 16: 70 (V) composition, carries out by embodiment 1 operating steps and method, and its hydrogenation efficiency is 8.4g / l, H 2 o 2 The yield is 20% higher than TOP:AR=25:75 (V), and the product concentration is 50wt%.

Embodiment 3

[0021] HTA: TOP: AR=11: 19: 70 (V) The working solution of composition, carries out by embodiment 1 operating steps and method, and its hydrogenation efficiency is 8.0g / l, H 2 o 2 The yield is 15% higher than TOP:AR=25:75 (V), and the product concentration is 35wt%.

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B15/023
Inventor 王继华
Owner 王继华
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