Isobutylene

Isobutylene Struktur
115-11-7
CAS-Nr.
115-11-7
Englisch Name:
Isobutylene
Synonyma:
ISOBUTENE;1-Propene, 2-methyl-;2-METHYLPROPENE;2-METHYL-1-PROPENE;SOBUTYLENE;Methylpropene;Isobuten;2-methyl-propen;iso-C4H8;ISOBUTYLENE
CBNumber:
CB4763080
Summenformel:
C4H8
Molgewicht:
56.11
MOL-Datei:
115-11-7.mol

Isobutylene Eigenschaften

Schmelzpunkt:
−140 °C
Siedepunkt:
−6.9 °C(lit.)
Dichte
0.5879
Dampfdichte
2 (vs air)
Dampfdruck
3278 mm Hg ( 37.7 °C)
Brechungsindex
1.3811
Flammpunkt:
-80 °C
Aggregatzustand
clear liquid
Farbe
Colorless to Almost colorless
Odor Threshold
10ppm
Wasserlöslichkeit
263mg/L(25 ºC)
FreezingPoint 
-140.34℃
Merck 
14,5141
BRN 
773645
Henry's Law Constant
0.20, 0.26, 0.33, and 0.41 at 30, 40, 50, and 60 °C, respectively (Leung et al., 1987:Zhang et al., 2002)
Stabilität:
Stable. Highly flammable - readily forms an explosive mixture with air. Incompatible with strong oxidizing agents.
InChIKey
VQTUBCCKSQIDNK-UHFFFAOYSA-N
LogP
2.35 at 20℃
CAS Datenbank
115-11-7(CAS DataBase Reference)
EPA chemische Informationen
Isobutene (115-11-7)
Sicherheit
  • Risiko- und Sicherheitserklärung
  • Gefahreninformationscode (GHS)
Kennzeichnung gefährlicher F+
R-Sätze: 12
S-Sätze: 9-16-33
RIDADR  UN 1055 2.1
WGK Germany  -
RTECS-Nr. UD0890000
4.5-31
Selbstentzündungstemperatur 869 °F
DOT Classification 2.1 (Flammable gas)
HazardClass  2.1
PackingGroup  III
HS Code  29012330
Giftige Stoffe Daten 115-11-7(Hazardous Substances Data)
Toxizität LC50 (inhalation) for mice 415 g/m3/2-h, rats 620 g/m3/4-h (quoted, RTECS, 1985).
Bildanzeige (GHS) GHS hazard pictogramsGHS hazard pictograms
Alarmwort Achtung
Gefahrenhinweise
Code Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code
H220 Extrem entzündbares Gas. Entzündbare Gase Kategorie 1 Achtung P210, P377, P381, P403
H280 Enthält Gas unter Druck; kann bei Erwärmung explodieren. Gase unter Druck verflüssigtes Gas Warnung P410+P403
Sicherheit
P210 Von Hitze, heißen Oberflächen, Funken, offenen Flammen und anderen Zündquellenarten fernhalten. Nicht rauchen.
P410+P403 Vor Sonnenbestrahlung schützen. An einem gut belüfteten Ort aufbewahren.

Isobutylene Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD

FARBLOSES KOMPRIMIERTES FLüSSIGGAS MIT CHARAKTERISTISCHEM GERUCH.

PHYSIKALISCHE GEFAHREN

Das Gas ist schwerer als Luft. und kann sich am Boden ausbreiten. Fernzündung möglich. Es kann sich in tiefer gelegenen Bereichen sammeln und den Luftsauerstoff verdrängen. Fließen, Schütten o.ä. kann zu elektrostatischer Aufladung führen.

CHEMISCHE GEFAHREN

Reagiert sehr heftig mit Halogenen, Oxidationsmittelnund starken Säuren unter Feuer- und Explosionsgefahr.

ARBEITSPLATZGRENZWERTE

TLV nicht festgelegt (ACGIH 2005).
MAK nicht festgelegt (DFG 2005).

AUFNAHMEWEGE

Aufnahme in den Körper durch Inhalation.

INHALATIONSGEFAHREN

Beim Entweichen aus dem Behälter verdampft die Flüssigkeit sehr schnell, wobei die Luft verdrängt wird. Ernste Erstickungsgefahr in geschlossenen Räumen.

WIRKUNGEN BEI KURZZEITEXPOSITION

WIRKUNGEN BEI KURZZEITEXPOSITION:
Schnelle Verdampfung kann zu Erfrierungen führen. Möglich sind Auswirkungen auf das Zentralnervensystem. Exposition gegenüber hohen Konzentrationen kann zu Bewusstlosigkeit führen.

LECKAGE

Gefahrenbereich verlassen! Fachmann zu Rate ziehen! Belüftung. Zündquellen entfernen. NICHT in die Kanalisation spülen. Wasserstrahl NIEMALS auf die Flüssigkeit richten. Chemikalienschutzanzug mit umgebungsluftunabhängigem Atemschutzgerät.

R-Sätze Betriebsanweisung:

R12:Hochentzündlich.

S-Sätze Betriebsanweisung:

S9:Behälter an einem gut gelüfteten Ort aufbewahren.
S16:Von Zündquellen fernhalten - Nicht rauchen.
S33:Maßnahmen gegen elektrostatische Aufladungen treffen.

Physikalische Eigenschaften

Colorless gas with a coal gas-like odor. The odor threshold concentration is 10 ppmv Nagata and Takeuchi (1990). This gas can be liquefied under pressure. The substance has low solubility in water, soluble in organic solvent, easy to polymerize. It is nonexplosive; however, it forms explosive mixtures with air. Containers holding isobutylene under pressure may explode if heated. The boiling point and freezing point of isobutylene are -6.9°C (19.6°F) and -141°C (-221°F), respectively. Isobutylene is extremely flammable. It is stable under recommended storage conditions and no decomposition may occur if stored and applied as directed.

Verwenden

Isobutylene is used as a monomer for the production of various polymers such as butyl rubber, polybutene and polyisobutylene. The most important application of butyl rubber is the manufacture of tyres for cars and other vehicles. Other applications of butyl rubber, polybutene and poyisobutylene are lubricants (motor oils), adhesives, sealants and coatings. Another major use of isobutylene is the production of methyl-tert-butyl ether (MTBE) and ethy-tert-butyl ether (ETBE) which are gasoline blending components for cleaner burning fuels. Isobutylene is also used for the production of anti-oxidants, fragrances and gas odorization products.

Verwenden

Isobutylene is an easily liquefied gas that primarily used to produce diisobutylene, trimers, butyl rubber, and other polymers. It is also used to produce antioxidants for foods, packaging, food supplements, and for plastics: Hatch, Pet. Refin. 39, No. 6, 207 (1960).

Application

Isobutylene is an important petrochemical raw material. In the pesticide industry, it is mainly used for the preparation of the organophosphorus insecticide terbufos, the pyrethroid insecticide permethrin and the acaricide pyridaben. Industrially, high-concentration isobutylene is mainly used for the production of polyisobutylene and copolymerization with isoprene to produce butyl rubber. The alkylation reaction of isobutene and isobutane can produce high-octane alkylated gasoline, and methyl tert-butyl ether obtained by reacting with methanol is an excellent gasoline additive.

Definition

ChEBI: isobutylene is an alkene that is prop-1-ene substituted by a methyl group at position 2. It is an alkene and a gas molecular entity.

Vorbereitung Methode

Isobutene is produced in refinery streams by absorption on 65% H2SO4 at about 15C, or by reacting with an aliphatic primary alcohol and then hydrolyzing the resulting ether.

Allgemeine Beschreibung

Isobutylene is a colorless gas with a faint petroleum-like odor. For transportation it may be stenched. It is shipped as a liquefied gas under its own vapor pressure. Contact with the liquid can cause frostbite. It is easily ignited. Its vapors are heavier than air and a flame can flash back to the source of leak very easily. The leak can either be a liquid or vapor leak. It can asphyxiate by the displacement of air. Under prolonged exposure to fire or heat the containers may rupture violently and rocket. It is used in the production of isooctane, a high octane aviation gasoline.

Air & Water Reaktionen

Highly flammable.

Reaktivität anzeigen

ISOBUTYLENE is incompatible with oxidizers. ISOBUTYLENE polymerizes easily. ISOBUTYLENE reacts easily with numerous materials, such as alkyl halides, halogens, concentrated sulfuric acid, hypochlorous acid, aluminum chloride, carbon monoxide and hydrogen with a cobalt catalyst. Polymerization is catalyzed by aluminum chloride and boron trifluoride.

Hazard

Highly flammable, dangerous fire and explosion risk, explosive limits in air 1.8–8.8%.

Health Hazard

Inhalation of moderate concentrations causes dizziness, drowsiness, and unconsciousness. Contact with eyes or skin may cause irritation; the liquid may cause frostbite.

Brandgefahr

Behavior in Fire: Containers may explode in fire. Vapor is heavier than air and may travel a long distance to a source of ignition and flash back.

Carcinogenicity

Groups of 50 male and 50 female F344/N rats were exposed to isobutene at concentrations of 0, 500, 2000, or 8000 ppm6 h/day 5 days/week for 105 weeks. Groups of 50 male and 50 female B6C3F1 mice were exposed to isobutene at concentrations of 0, 500, 2000, or 8000 ppm 6 h/day, 5 days/week for 105 weeks. Under the conditions of these 2 year inhalation studies, there was some evidence of the carcinogenic activity of isobutene in male F344/N rats based on an increased incidence of follicular cell carcinoma of the thyroid gland. There was no evidence of the carcinogenic activity of isobutene in female F344/N rats or male or female B6C3F1 mice exposed to 500, 2000, or 8000 ppm.

Environmental Fate

Photolytic. Products identified from the photoirradiation of 2-methylpropene with nitrogen dioxide in air are 2-butanone, 2-methylpropanal, acetone, carbon monoxide, carbon dioxide, methanol, methyl nitrate, and nitric acid (Takeuchi et al., 1983). Similarly, products identified from the reaction of 2-methylpropene with ozone included acetone, formaldehyde, methanol, carbon monoxide, carbon dioxide, and methane (Tuazon et al., 1997).
The following rate constants were reported for the reaction of 2-methylpropene and OH radicals in the atmosphere: 3.0 x 10-13 cm3/molecule?sec at 300 K (Hendry and Kenley, 1979); 5.40 x 10-11 cm3/molecule?sec (Atkinson et al., 1979); 5.14 x 10-11 at 298 K (Atkinson, 1990). Reported reaction rate constants for 2-methylpropene and ozone in the atmosphere include 2.3 x 10-19 cm3/molecule?sec (Bufalini and Altshuller, 1965); 1.17 x 10-19 cm3/molecule?sec at 300 K (Adeniji et al., 1965); 1.21 x 10-17 cm3/molecule?sec at 298 K (Atkinson, 1990).
Chemical/Physical. Complete combustion in air yields carbon dioxide and water. Incomplete combustion yields carbon monoxide.

läuterung methode

Dry isobutene by passage through anhydrous CaSO4 at 0o. Purify it further by freeze-pump-thaw cycles and trap-to-trap distillation. [Beilstein 1 IV 796.]

Isobutylene Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


Isobutylene Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Global( 229)Lieferanten
Firmenname Telefon E-Mail Land Produktkatalog Edge Rate
Hebei Mojin Biotechnology Co., Ltd
+8613288715578
sales@hbmojin.com China 12452 58
Henan Fengda Chemical Co., Ltd
+8613613820652
info@fdachem.com China 5085 58
Henan Tianfu Chemical Co.,Ltd.
+86-0371-55170693 +86-19937530512
info@tianfuchem.com China 21700 55
career henan chemical co
+86-0371-86658258
sales@coreychem.com China 29914 58
Hubei Jusheng Technology Co.,Ltd.
18871490254
linda@hubeijusheng.com CHINA 28180 58
Hebei Guanlang Biotechnology Co., Ltd.
+86-19930503282
alice@crovellbio.com China 8823 58
Hubei xin bonus chemical co. LTD
86-13657291602
linda@hubeijusheng.com CHINA 22968 58
Chongqing Chemdad Co., Ltd
+86-023-61398051 +8613650506873
sales@chemdad.com China 39916 58
CONIER CHEM AND PHARMA LIMITED
+8618523575427
sales@conier.com China 47465 58
Shaanxi Dideu Medichem Co. Ltd
+86-029-81138252 +86-18789408387
1057@dideu.com China 3979 58

115-11-7()Verwandte Suche:


  • HP-ISOBUTYLENE
  • ISOBUTYLENE
  • 1,1-dimethylethene
  • 1,1-Dimethylethylene
  • 2-methyl-1-propen
  • 2-Methylpropene-isobutylene
  • 2-METHYLPROPENE CYL. WITH 27 L (NET~14KG
  • 2-METHYLPROPENE PRESSURE TIN WITH 250 ML (NET ~150 G)
  • 2-METHYLPROPENE, CYLINDER WITH 7 L (NET ~3.6 KG)
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  • SOBUTYLENE
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  • 2-METHYL-1-PROPENE
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  • 115-11-7
  • CH32CCH2
  • CH2CCH32
  • 115117
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