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[Chemical Knowledge]：What are the upstream raw materials for krypton? What do the downstream products contain?

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Although krypton is not widely used as other common gases in the field of chemical production raw materials, it still has certain upstream and downstream related products. The following are some upstream and downstream products related to krypton:

1. Upstream products:

krypton upstream products are mainly air, through the air separation method to extract krypton. Air separation method generally includes compression, cooling, liquefaction, distillation and other steps to separate krypton from air.

2. Downstream products:

(1) Lighting products: Krypton is widely used in the lighting field, such as krypton lamps. The krypton lamp is a gas-filled bulb that uses the light emitted when krypton is discharged to illuminate. Krypton lamps have high luminous efficiency and long life, and are often used in places that require high brightness and long-term lighting.

(2) Laser: Krypton can also be used in lasers as a working gas or pump gas. Krypton ion laser is the use of krypton gas as a working gas, through the discharge excitation krypton ions to produce laser.

(3) Display Devices: Krypton is also used in display devices, such as field emission displays (FED). The FED uses an electric field to excite rare gases such as krypton to produce ultraviolet rays, and the ultraviolet rays then excite the phosphor to emit light, thereby achieving display.

(4) Medical research: Krypton also has certain applications in medical research, such as pulmonary function tests. Using the characteristics of krypton absorption peak, lung function can be evaluated by breath test.

In short, the upstream and downstream related products of krypton are mainly concentrated in the fields of lighting, laser, display and medical research. Although the scope of application is not as wide as other common gases, it still has certain application value in specific fields.

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