97-93-8 Usage
Chemical Properties
Colorless liquid. Miscible with saturated hydrocarbons.
Uses
Different sources of media describe the Uses of 97-93-8 differently. You can refer to the following data:
1. Catalyst intermediate for polymerization of
olefins, especially ethylene; pyrophoric fuels; production
of α-olefins and long-chain alcohols; gas
plating of aluminum.
2. Triethylaluminum, in combination withmany transition metal complexes, is used as Ziegler-Natta polymerization and hydrogenationcatalyst. Also, it is used as intermediatein organic syntheses.
3. Triethylaluminum is used as a co-catalyst in the industrial production of polyethylene and for the production of medium chain alcohols. Used as a catalyst in Ziegler-Natta polymerization process for vinyl, olefin, diene polymerizations and linear oligomerization and cyclization of unsaturated hydrocarbons. It is also used as a catalyst to produce ethylene gas, chain growth of ethylene, longer chain aluminum alkyls, and in plating aluminum.
General Description
A colorless liquid. Flammable gas is produced on contact with water.
Air & Water Reactions
Pyrophoric, ignites in moist air [Merck 11th ed. 1989]. Reacts violently with water.
Reactivity Profile
Triethylaluminum reacts violently with water, alcohols, phenols, amines, carbon dioxide, sulfur oxides, nitrogen oxides, halogens, and halogenated hydrocarbons, causing fire and explosion hazards. [Handling Chemicals Safely 1980 p. 929]. A mixture of dimethylformamide and triethyl aluminum exploded when heated [Bretherick 1995].
Health Hazard
Different sources of media describe the Health Hazard of 97-93-8 differently. You can refer to the following data:
1. Exposure to smoke from fire causes metal-fume fever (flu-like symptoms). Since liquid ignites spontaneously, contact with eyes or skin causes severe burns.
2. The health hazard from exposure to thiscompound is attributed to its violent reactionswith many substances, including airand water. Because of its violent reactionwith moisture, skin contact can cause a dangerousburn. Contact with eyes can damagevision.
Fire Hazard
Triethylaluminum is extremely pyrophoric,
igniting spontaneously in air. It reacts
violently with water, alcohol, halogenated
hydrocarbons, and oxidizing substances.
Among the alcohols, the lower alcohols,
methanol, ethanol, n- propanol, and
isopropyl alcohol, react explosively with
triethylaluminum. Reactions with lower
aldehydes, ketones and amides can be vigorous
to violent. It may explode on contact
with halocarbons in excess molar ratios or
upon slight warming. When heated to 200°C
(392°F), it decomposes, liberating ethylene
and hydrogen.
Flammability and Explosibility
Highlyflammable
Safety Profile
Extremely destructive
to living tissue. A very dangerous fire hazard
when exposed to heat or flame. Ignites
spontaneously in air. Explodes violently in
water. To fight fire, use CO2, dry sand, dry
chemical. Do not use water, foam, or
halogenated fire-fighting agents. Explosive
reaction with alcohols (e.g., methanol,
ethanol, propanol), carbon tetrachloride,
N,N-dmethylformamide + heat.
Incompatible with halogenated
hydrocarbons; triethyl borane. When heated
to decomposition it emits acrid smoke and
irritating fumes. See also ALUMINUM
COMPOUNDS and ORGANOMETALS.
Purification Methods
Purify it by fractionation in an inert atmosphere under a vacuum in a 50cm column containing a heated nichrome spiral, taking the fraction b 112-114o/27mm. It is very sensitive to H2O and should be stored under N2. It should not contain chloride ions which can be shown by hydrolysis and testing with AgNO3. [Baker & Sisler J Am Chem Soc 75 4828 5193 1953, NMR: Brownstein et al. J Am Chem Soc 81 3826 1959, Beilstein 4 IV 4398.]
Check Digit Verification of cas no
The CAS Registry Mumber 97-93-8 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 9 and 7 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 97-93:
(4*9)+(3*7)+(2*9)+(1*3)=78
78 % 10 = 8
So 97-93-8 is a valid CAS Registry Number.
InChI:InChI=1/3C2H5.Al/c3*1-2;/h3*1H2,2H3;/rC6H15Al/c1-4-7(5-2)6-3/h4-6H2,1-3H3
97-93-8Relevant articles and documents
Eden,Feilchenfeld
, p. 233 (1962)
Brodskii et al.
, p. 139,140 - 143 (1979)
Process for synthesis of triethyl (by machine translation)
-
Paragraph 0010, (2016/11/21)
The invention discloses a process for synthesis of triethyl, comprising the following steps: the percentage pondere the aluminum powder and titanium powder mixed, under the protection of inert gas, is added to the aluminum is provided with three reaction kettle as seed, in 120-130 °C and 8-12MPa under the reaction conditions, to carry out hydrogenation reaction 6-7 hours, in 0.2-0.3 MPa pressure of the ethylene is injected continuously in the reaction kettle, 5-6 hours to get crude reaction is completed within three b aluminum, product through distillation, ethylene purification of final products. This invention, in order to triethyl aluminum seed material as the main body of a dispersion medium catalytic reaction, the reaction temperature and the pressure is low, the yield of the obtained product can reach 90% or more. (by machine translation)
Synthesis of trialkylaluminum derivatives by the reaction of non-solvated aluminum hydride with α-olefins
Gavrilenko
, p. 1161 - 1163 (2007/10/03)
Hydroalumination of α-olefins by non-solvated polymeric aluminum hydride (AlH3)n occurs at 120-140°C. Mechanochemical activation accelerates this reaction. The addition of catalytic amounts of the prepared R3Al forms to the reaction system decreases the temperature of the process to 90-100°C. The greatest initiation effect is observed when ate-complexes of the MAlR4 type (M = Li, Na) are used: the reaction occurs with a higher rate already at 60-90°C affording R3Al free of admixtures of carbalumination products and dimers of α-olefins.
