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Chemical active reaction refers to a chemical reaction in which two or more substances are brought into contact with each other or mixed together, and also includes decomposition, explosion, and polymerization reaction caused by external conditions such as heat, light, friction or contact with air when the chemical is separately stored. When exposed to water or other inconsistencies, it produces exothermic, burning, explosive, and releases toxic gases.
Hybrid hazard refers to the burning, explosion or other chemical reactions that may occur when chemicals are mixed, mixed, mixed, or contacted with other chemically contradictory materials, posing a risk of disaster.
For hazards not indicated in the MSDS, but often occurring in actual production activities, matrix, data forms, etc., can be used to facilitate the review and confirmation of compatibility between chemicals.
1. An important part of the accident caused by the active reaction during handling
Due to the high energy level of the active substance itself, in some production, operation or disposal, as the active substance is concentrated, heated, pressurized, rapidly compressed, rubbed or impacted, it will cause a concentrated explosion of the intrinsic energy of the active substance. , causing an accidental fire and explosion accident. Common accidents include distillation, filtration, evaporation, sieving, extraction, crystallization, recycling, placement, reflux, condensation, mixing, agitation, cryogenic cooling, cooling, heating, destruction, leakage, and scattering.
2. Types of accidents that are easily caused by active reactions
(1) generating an accident caused by an unstable or explosive peroxide;
(2) Polymerization accidents during production or storage;
(3) explosion accidents caused by uncontrolled free radical polymerization;
(4) The presence of trace impurities reduces the accident caused by the stability of the active substance;
(5) an accident caused by a rapid increase in pressure in an exothermic reaction;
(6) Accidents caused by gas overpressure in a closed container;
(7) an accident caused by a polycondensation reaction;
(8) Explosive decomposition of unstable endothermic compounds;
(9) an accident caused by loss of control during the induction period;
(10) Accidents caused by compounds such as peroxides and intermediates;
(11) Peroxidation accidents;
(12) Accidents caused by cold flames;
(13) Neutralization reaction accidents;
(14) Fire and explosion accidents caused by runaway reactions.
(Source: China Chemical Safety Association)
[Editor: Chen Guofang]
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