ไตรคลอโรเอทิลีน Trichloroethylene TCE

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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