1,1,2-Trichloroethylene (TCE) ไตรคลอโรเอทิลีน, ไตรคลอโรเอตทิลีน
ในงานอุตสาหกรรมที่ต้องใช้ตัวทำละลาย
ไตรคลอโรเอทีลีนเป็นสารอีกตัวหนึ่งที่ใช้เป็นตัวทำละลาย มันเป็นของเหลวใส ไม่มีสี
กลิ่นคล้ายอีเทอร์และคลอโรฟอร์ม คุณสมบัติที่สามารถละลายไขมันได้ดี จึงเหมาะกับงานทำความสะอาดคราบไขมัน
เช่น ทำความสะอาดผิวโลหะในชิ้นส่วนอิเล็กทรอนิกส์ และอุตสาหกรรมซักแห้ง
นอกจากนั้นยังใช้ผสมสีและกาว น้ำยาลบคำผิดและหมึกด้วย
ประโยชน์/การใช้งาน
1,1,2-Trichloroethylene (TCE) ใช้ล้างคราบน้ำมันต่างๆ การชะล้างดีมาก
ล้างงานโลหะ
1,1,2-Trichloroethylene (TCE) เป็นตัวทำละลายไขมัน ขี้ผึ้ง เรซิ่น
น้ำมัน ยาง สี น้ำมันเคลือบเงาและ เซลลูโลส
เป็นตัวทำละลายในอุตสาหกรรมอินทรีย์เคมี อาหาร และผลิตภัณฑ์ทางเภสัชกรรม
The chemical compound trichloroethylene (C2HCl3) is a
chlorinated hydrocarbon commonly used as an industrial solvent. It is a clear
non-flammable liquid with a sweet smell. It should not be confused with the
similar 1,1,1-trichloroethane, which is commonly known as chlorothene.
The IUPAC name is trichloroethene. Industrial abbreviations
include TCE, trichlor, Trike, Tricky and tri. It has been sold under a variety
of trade names. Under the trade names Trimar and Trilene, trichloroethylene was
used as a volatile anesthetic and as an inhaled obstetrical analgesic in
millions of patients. Trichloroethylene is an effective solvent for a variety
of organic materials.
When it was first widely produced in the 1920s,
trichloroethylene's major use was to extract vegetable oils from plant
materials such as soy, coconut, and palm. Other uses in the food industry
included coffee decaffeination and the preparation of flavoring extracts from
hops and spices. It has also been used for drying out the last bit of water for
production of 100% ethanol.
From the 1930s through the 1970s, both in Europe and North
America, trichloroethylene was used as a volatile anesthetic almost invariably
administered with nitrous oxide. Marketed in the UK by ICI under the trade name
Trilene it was coloured blue (with a dye called waxoline blue) to avoid
confusion with the similar smelling chloroform. TCE replaced earlier
anesthetics chloroform and ether in the 1940s, but was itself replaced in the
1960s in developed countries with the introduction of halothane, which allowed
much faster induction and recovery times. Trilene was also used as a potent
inhaled analgesic, mainly during childbirth. It was used with halothane in the
Tri-service field anaesthetic apparatus used by the UK armed forces under field
conditions. As of 2000, however, TCE was still in use as an anesthetic in
Africa. It has also been used as a dry cleaning solvent, although replaced in
the 1950s by tetrachloroethylene (also known as perchloroethylene), except for
spot cleaning where it was used until the year 2000. Trichloroethylene was
marketed as 'Ecco 1500 Anti-Static Film Cleaner and Conditioner' until 2009,
for use in automatic movie film cleaning machines, and for manual cleaning with
lint-free wipes. Perhaps the greatest use of TCE has been as a degreaser for
metal parts. The demand for TCE as a degreaser began to decline in the 1950s in
favor of the less toxic 1,1,1-trichloroethane. However, 1,1,1-trichloroethane
production has been phased out in most of the world under the terms of the
Montreal Protocol, and as a result trichloroethylene has experienced some
resurgence in use as a degreaser. TCE has also been used in the United States
to clean kerosene-fueled rocket engines (TCE was not used to clean
hydrogen-fueled engines such as the Space Shuttle Main Engine). During static
firing, the RP-1 fuel would leave hydrocarbon deposits and vapors in the
engine. These deposits had to be flushed from the engine to avoid the
possibility of explosion during engine handling and future firing. TCE was used
to flush the engine's fuel system immediately before and after each test
firing. The flushing procedure involved pumping TCE through the engine's fuel
system and letting the solvent overflow for a period ranging from several
seconds to 30–35 minutes, depending upon the engine. For some engines, the
engine's gas generator and LOX dome were also flushed with TCE prior to test
firing. The F-1 rocket engine had its LOX dome, gas generator, and thrust
chamber fuel jacket flushed with TCE during launch preparations. TCE is also
used in the manufacture of a range of fluorocarbon refrigerants such as 1,1,1,2-Tetrafluoroethane more
commonly known as HFC 134a
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