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Special form type palladium catalyst in use for preparing hydrogen peroxide and preparation method

A technology for the production of hydrogen peroxide and palladium catalysts, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. Problems such as large amount of production

Active Publication Date: 2005-01-12
江山市双氧水有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Skeleton nickel catalyst technology has been phased out due to reasons such as complex reactor structure, troublesome operation, small production capacity, and short service life of the catalyst.
Although the suspended bed palladium catalyst process has a high production capacity, the hydrogenation reactor is not easy to promote due to patent issues
The vast majority of fixed-bed palladium catalyst processes use spherical catalysts. Due to the limited activity of catalysts (the space-time yield of industrial devices is 3.0 to 3.6g H 2 o 2 (100%) / gcat. d), the production capacity is relatively low; secondly, due to the poor selectivity of the catalyst, the generation of degradation products is large, and the unit consumption of anthraquinone is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The dry rubber powder obtained by neutralizing aluminum sulfate and sodium aluminate was prepared into clover strips of φ3mm by extrusion molding, baked in an oven at 150°C for 20 hours, and calcined at 1000°C for 6 hours to obtain a carrier. Then, 500 grams of carrier was treated with 2.0% soda ash complex solution for half an hour, washed with water until pH = 12, and baked in an oven at 150° C. for 12 hours. Take 2.1 g of palladium chloride, dissolve it in 100 ml of pure water with 10 ml of concentrated hydrochloric acid, heat to dissolve, adjust the pH to 3.0, add nickel nitrate with a nickel content of 0.5 g, stir and dissolve, replenish 400 ml of water, and heat to 80°C , Pour the carrier into it, stir it quickly for a few minutes, then let it stand for half an hour to soak, drain the mother liquor, keep it in an oven at 150°C for 20 hours, and bake it at 580°C for 4 hours. The prepared catalyst 310g was evaluated under the conditions of 60°C, hydrogen pressure 0....

Embodiment 2

[0047] Add the nickel nitrate that nickel content is 2.5g, other methods are prepared by the catalyst of the preparation method of embodiment 1, evaluation result is: hydrogenation efficiency is 5.21g / L, and space-time yield is 2.90g H 2 o 2 (100%) / gcat.·d.

Embodiment 3

[0049] Add the nickel nitrate that nickel content is 10g, other methods are prepared by the catalyst of the preparation method of embodiment 1, evaluation result is: hydrogenation efficiency is 5.32g / L, and space-time yield is 2.97g H 2 o 2 (100%) / gcat.·d.

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Abstract

A shaped Pd catalyst is used to prepare hydrogen peroxide through dissolving alkyl anthrauinone in the mixed solvent of ester and arylhydrocarbon to obtain the working liquid, catalytic hydrogenating reaction on said alkyl anthraquinone in working liquid, and oxidizing by O2-enriched air or O2. Said catalyst is prepared through carrying palladium chloride by the salt of alkali metal, alkali-earth metal, or transition metal for modifying it, and extruding out.

Description

1. Technical field: [0001] The invention relates to a method for preparing hydrogen peroxide, in particular to a special-shaped palladium catalyst for producing hydrogen peroxide and a preparation method thereof, which is applied in an anthraquinone automatic oxidation process, using a clover or four-leaf clover palladium The catalyst is used to generate hydrogenated alkyl anthraquinone through hydrogenation reaction of alkyl anthraquinone in the working fluid, and then use oxygen-enriched air or oxygen to oxidize to generate hydrogen peroxide. 2. Background technology: [0002] Hydrogen peroxide, also known as hydrogen peroxide, is an important inorganic chemical raw material. It is mainly used in the bleaching of textiles and pulp, the synthesis of chemicals and environmental protection, and it is also widely used in electronics, food and metallurgical industries. [0003] The industrial production method of hydrogen peroxide is mainly the anthraquinone auto-oxidation met...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J32/00B01J35/02B01J37/00C01B15/023
Inventor 王忠平傅骐张瑜平
Owner 江山市双氧水有限公司
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