Brief overview of production methods of Tetrahydrofuran THF CAS 109-99-9

Industrial production first used furan as raw material, and the mixture of furfural and steam was passed into a reactor filled with zinc-chromium-manganese metal oxide (or palladium) catalyst, and the carbonyl group was removed at 400-420°C to form furan; The skeleton nickel is the catalyst, and tetrahydrofuran is produced by hydrogenating furan at 80-120°C. This method produces 1 ton of tetrahydrofuran, which consumes about 3 tons of polysaccharide aldehydes. There are many production methods developed later. The industrialized method includes 1,4-butanediol catalytic dehydration ring method, because 1,4-butanediol is made from acetylene and formaldehyde. This method is called Reppe Method); the production of tetrahydrofuran by 1,4-dichlorobutene, a by-product of the chloroprene rubber monomer chloroprene, is called the dichlorobutene method; a catalytic hydrogenation method using maleic anhydride as a raw material has been developed.

Name: Tetrahydrofuran THF
CAS: 109-99-9
Molecular Formula: C4H8O
Molecular Weight: 184.234
CAS 109-99-9

Names and Identifiers
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Synonyms THF
oxolane
Sodium tri-sec-butylborohydride
Butane, alpha,delta-oxide
Cyclotetramethylene oxide
Diethylene oxide
Furan, tetrahydro-
Furanidine
1,2,3,4-tetrahydro-9H-fluoren-9-one
CAS 109-99-9
EINECS 203-726-8
InChI InChI=1/C13H12O/c14-13-11-7-3-1-5-9(11)10-6-2-4-8-12(10)13/h1,3,5,7H,2,4,6,8H2

Physico-chemical Properties
Molecular Formula C4H8O
Molar Mass 184.234 g/mol
Density 1.17g/cm3
Melting Point -108.4℃
Boling Point 343.2°C at 760 mmHg
Flash Point 150.7°C
Solubility miscible
Vapor Presure 7.15E-05mmHg at 25°C
Refractive Index 1.611

Risk and Safety
Hazard Symbols F – Flammable
Flammable
Xi – Irritant
Irritant
Risk Codes R11 – Highly Flammable
R19 – May form explosive peroxides
R36/37 – Irritating to eyes and respiratory system.
Safety Description S16 – Keep away from sources of ignition.
S29 – Do not empty into drains.
S33 – Take precautionary measures against static discharges.
UN IDs UN 2056

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CAS 109-99-9, Tetrahydrofuran THF, C4H8O
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