Hydrogen peroxide catalyst

First, product introduction

    Hydrogen peroxide is a green chemical product. Its production and use process is almost pollution-free, so it is called "clean" chemical product, and the application prospect is very promising. At first, hydrogen peroxide was only used in the pharmaceutical and military industries, and later it was gradually used in chemical synthesis, textile, paper, environmental protection, food and agriculture. The market demand is expanding day by day. Especially the purification treatment of organic waste gas VOC, which is widely used in chemical, paint, enameled wire, coating, oven and other industries, and finally completely oxidized into harmless CO2And H2O。

Second, product features

    Shaanxi Kaida developed hydrogen peroxide catalysts. The problems and technical defects existing in the technology are solved, including the balance of catalyst activity and sampling, the low strength of catalyst support, easy to depowder and break, and the service life and regeneration cycle of the catalyst. The final palladium catalyst for anthraquinone hydrogen peroxide production has a very balanced surface area, pore volume and pore distribution matching, and ensures that the overall particle compressive strength of the catalyst is greatly improved, the wear value is greatly reduced, the catalyst is not easy to depowder and break, and the service life and regeneration cycle are greatly extended;Activated alumina is used as the catalyst carrier, and the spherical alumina is added asymmetrically during the molding process by means of a reaming agent. Such that the surface surface distribution of the spherical alumina support obtained by molding is asymmetrical along the radial direction of the support. It not only ensures the requirements of macropores on the surface of the catalyst support and low specific surface area, but also achieves the characteristics of high compressive strength of the catalyst as a whole. The main active ingredient of the catalyst is all-metal palladium. In the process of maintaining the catalysis, by adjusting the type and amount of the active component positioning agent sprayed on the support, the dipping effect of the active component with controllable depth can be achieved.

III. Industrial use report

 Since 2000, Shaanxi Kaida has entered the field of palladium catalysts for hydrogen peroxide, responsible for improving the surface properties of the catalysts used in the generation of hydrogen peroxide by the anthraquinone method, improving the performance of the carrier and the preparation process of the catalyst, and adding active ingredients to reduce the load of palladium. 

In 2012, the 40-ton KD_PH_PD_02 catalyst was successfully tested. The catalyst entered the hydrogen peroxide workshop of a company in February 2012 for filling. The kettle numbers are B and C, and each kettle is filled with 20 tons of catalyst. Through reagent production and operation, the catalyst capacity exceeds 5.0kgH2O2 100%/kg cat.d, the average daily production of hydrogen peroxide reaches 325 tons H2O2 27.5%/day, greatly exceeding the full load design target of 300 tonsH2O2 27.5%/day.The domestic similar catalyst activity is generally 3.3-3 kg H2O2 About 100%/kg cat.d. such as domesticThe catalyst SC-AO3 supplied by a mainstream under the same reaction conditions, the bed temperature is 56 degrees Celsius, and two catalysts of A/B need to be used in series with a capacity of 3.6kg H2O2 100%/kg cat.dThe results of industrial use of hydrogen peroxide on palladium alumina catalyst in a company show that the nonlinear pore size distribution of palladium alumina catalyst has high hydrogenation activity, significantly enhanced selectivity, and stable effective anthraquinone composition. Therefore, in the use report, it is concluded that under the same reaction conditions, our company's KD_PH_PD_02Compared with the SC-AO3 catalyst in Shanghai, it is fully suitable for device use.

2. In 2014, the 80kt/a hydrogen peroxide plant (a total of two catalyst beds) was filled with a 25-ton KD-01 palladium catalyst in January 2006, with a service life of 7 years, which could still meet the production needs of the plant; in February 2010, another 25-ton KD-02 palladium catalyst was filled, which was used for 3 years. The catalyst production capacity of a single section could still reach 3.85kgH2O2/kgcat.d, and the 100kt/a hydrogen peroxide plant (a total of three catalyst beds) was filled with two 40-ton KD-02 catalysts in February 2012. It was put into use in March 2012. The operating period of a single section (20 tons of catalyst) reached eight months, and the daily output could be stably controlled at more than 350 tons/day. The catalyst production capacity reached 4.8kgH2O2/kgcat.d. Three sets of hydrogen peroxide plants in Baling Branch have used catalysts produced by many domestic palladium catalyst manufacturers. In terms of catalyst service life, production capacity, regeneration cycle and palladium loss, Shaanxi Kaida KD series catalysts are better than catalysts produced by other manufacturers.

3. Performance evaluation report of anthraquinone hydrogenation catalyst KD-03 (fixed type): In March 2012, Shaanxi Kaida KD-03 type 20t palladium hydrogenation catalyst (40t in total) was loaded on the hydrogenation fixed bed T1101B/C of hydrogen peroxide 1 #unit (one water) hydrogenation unit of Baling Coal Chemical Department of Sinopec Baling Branch, respectively. It was put into production on March 4, 2012. After being tested by Baling Company's technical center, Shaanxi Kaida KD-03 type 40t palladium hydrogenation catalyst meets the Quality Standard of Baling Branch Coal Chemical Department. Part, method and use of the device: Part: 1 #hydrogen peroxide unit hydrogenation fixed bed T1101B/C, method: manual loading, function: catalyst for the hydrogenation of anthraquinone, hydrogenation of anthraquinone in the working liquid to hydroanthraquinone. Industrial application Performance evaluation index: Evaluation index: Index Catalysis 3.5kgH2O2/kgCat.d
The catalyst has a lifespan of 3 to 5 years.
Industrial applications:
The catalyst in T1101B/C of the 1 #unit has been used since March 4, 2012, and has not been replaced since the initial loading and use until March 2019.

1 #hydrogen peroxide unit T1101A/B/C catalyst usage statistics table