How does the explosion of hydrogen peroxide in Luxi Chemical affect propylene oxide?

5month1day noon12time20min, the hydrogen peroxide production area of ​​Sinochem Group Luxi Chemical exploded and caught fire. The preliminary analysis of the cause of the accident is that when the working fluid configuration kettle of the hydrogen peroxide unit is used to recover the working fluid, a large amount of 70%concentrated hydrogen peroxide, there may be impurities in the kettle, causing the hydrogen peroxide to decompose violently, causing an overpressure explosion in the configuration kettle, causing on-site personnel9people died,1 People are injured,1People lost contact.

The fuse of this accident is“hydrogen peroxide”, that is, the aqueous solution of hydrogen peroxide, which is often used in medical treatment, sterilization, preparation of oxygen, oxidant, bleaching agent, dechlorination agent, etc. As a strong oxidant, it is unstable and easily decomposed, and a large amount of heat will be released during the decomposition. If metals, salts and impurities are mixed in it, the decomposition process may be intensified, and then an explosion may be caused.

HPPO process, that is to use hydrogen peroxide as raw material to directly oxidize propylene to produce propylene oxide, which belongs to a kind of The new green process technology and process patents are mainly held by German Degussa Chemical Co., Ltd., German Uhde Company, American Dow Chemical Company, German BASF Company, etc. Domestic Sinopec, Dalian Institute of Physical Chemistry, Chinese Academy of Sciences, and East China University of Science and Technology also have independent technologies. The process is relatively simple, and will not produce too many by-products, and will not pollute the surrounding environment, the produced Propylene oxide is currently the only product China is allowed to export.

inHPPOIn the production process, ensuring the quality of hydrogen peroxide is an important key content. The most direct impact of the explosion in the hydrogen peroxide production area of ​​Luxi Chemical:

The first is to stop production and reform, that is, all safety and environmental protection devices that do not meet the standards are immediately stopped, rectified within a time limit, and closed. The company’s current shutdown and related devices involve hydrogen peroxide and caprolactam·Nylon6, polyol plant, the specific resumption time is not yet clear.

The second is to increase safety production supervision,HPPOThe barriers to entry for new projects of propylene oxide by process method have been raised, etc. According to the statistics of Tiantian Chemical Network, currently operatingHPPO crafts include2014Jilin Shenhua and Sinopec Changling, which were put into production in 2018,2022year Taixing Yida and Qixiang Tengda and 2023The total annual production capacity of Jincheng Petrochemical and Jiahong New Materials put into production in 2019155155 tons, and New and proposed projects in the future will reach 420 tons.