isobutylene
Very LowTechnical / Scientific
Definition
Meaning
A flammable, volatile hydrocarbon (C₄H₈) with a double bond, used as a chemical intermediate.
An important olefin monomer used primarily in the production of butyl rubber, plastics, and fuel additives. It is an isomer of butylene.
Linguistics
Semantic Notes
Strictly a chemical term. The word refers specifically to the compound (CH₃)₂C=CH₂. It is not used in a figurative or extended sense outside chemistry.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling and pronunciation are consistent.
Connotations
Neutral technical term in both regions.
Frequency
Identically rare outside specialized chemical, engineering, or industrial contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
[The plant/process] produces/isobutylene.Isobutylene is used [as a monomer/in the production of X].[Polymerization/Reaction] of isobutylene yields...Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “N/A”
Usage
Context Usage
Business
Used in reports about petrochemical feedstocks, production capacity, or market prices for chemical commodities.
Academic
Appears in chemistry, chemical engineering, and polymer science journals and textbooks.
Everyday
Virtually never used in everyday conversation.
Technical
Core term in organic chemistry and industrial chemical processes; specifications for purity, catalysts, and reaction conditions.
Examples
By Part of Speech
verb
British English
- N/A
American English
- N/A
adverb
British English
- N/A
American English
- N/A
adjective
British English
- The isobutylene unit was shut down for maintenance.
American English
- The isobutylene feedstock met the purity specs.
Examples
By CEFR Level
- N/A
- Isobutylene is a chemical.
- The factory produces isobutylene for making synthetic rubber.
- The catalytic dehydrogenation of isobutane yields high-purity isobutylene, a crucial monomer for the polymer industry.
Learning
Memory Aids
Mnemonic
Think: 'ISO' means 'same but different' (an isomer) + 'BUTYL' (four-carbon group) + 'ENE' (has a double bond). So, 'an isomer of a four-carbon molecule with a double bond'.
Conceptual Metaphor
Building block (as a monomer for creating larger polymer chains).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate as 'изобутан' (isobutane), which is a saturated alkane. The correct term is 'изобутилен'.
Common Mistakes
- Misspelling as 'isobutylene' (missing 'e') or 'isobutylene'. Confusing it with similar-sounding chemicals like 'isobutane' or 'butylene'.
Practice
Quiz
What is the primary industrial use of isobutylene?
FAQ
Frequently Asked Questions
Yes, it is highly flammable and forms explosive mixtures with air. It must be handled with appropriate safety precautions.
Butylene (or butene) refers to several four-carbon alkenes with different structures. Isobutylene (2-methylpropene) is one specific isomer where the double bond is at the end of a branched chain.
It is primarily obtained as a by-product of petroleum refining (from fluid catalytic cracking units) or produced by dehydrogenation of isobutane.
Not directly. You encounter its derivatives, such as butyl rubber in tyre inner liners, sealants, and some fuel additives like MTBE (methyl tert-butyl ether).