Applications of Cis-2-Butene in Industrial Manufacturing

Cis-2-Butene, produced via advanced distillation and isomerization processes in our facility, serves as a critical intermediate in several focused downstream industries. The applications featured below highlight sectors where this material has established, trackable roles within commercial chemical production chains. Each scenario details industry-specific compliance requirements, integration into manufacturing processes, indicative usage levels, and the resulting finished goods.

1. Linear Low-Density Polyethylene (LLDPE) Comonomer Synthesis

Our material is a building block in the synthesis of linear low-density polyethylene, particularly as a comonomer during the copolymerization of ethylene-based plastics. Downstream polyolefin plants incorporate it to adjust molecular branching, improving film clarity, strength, and processability. The stream’s purity and isomer balance impact polymer consistency and downstream production yields.

Industry compliance standards

• ASTM D1248 (Polyethylene Plastics Molding & Extrusion Materials)
• FDA 21 CFR 177.1520 (Olefin polymers for contact with food)
• EU Regulation (EU) No 10/2011 (Plastic materials and articles for food contact)
• ISO 1872-1 (Polyethylene resins — Designation system)

Typical usage ratio

• 5–12% by mol ratio as comonomer, adjusted according to desired density and mechanical properties of final polyethylene film or product

Downstream process integration

• Fed as a vapor-phase comonomer into gas-phase or slurry-phase ethylene polymerization reactors; typically introduced after pre-polymerization to control branching distribution and melt index

Final product types

• LLDPE films for packaging, agricultural film, stretch wrap, injection-molded containers, rotomolded tanks

2. Butadiene Production through Dehydrogenation

Cis-2-Butene is dehydrogenated in dedicated catalytic processes to yield 1,3-butadiene, a cornerstone monomer in the synthetic rubber industry. Feedstock composition and purity critically determine catalyst lifetimes and butadiene selectivity during large-scale extraction or oxidative dehydrogenation.

Industry compliance standards

• ISO 8491 (Butadiene for industrial use — Method of test)
• REACH Regulation (EC) No 1907/2006 (Substance Registration for ECHA compliance in EU market)
• JIS K 1442 (Specification for butadiene by catalytic dehydrogenation)
• API MPMS Chapter 14.1 (Sampling and handling of chemically active gases)

Typical usage ratio

• Up to 100% feedstock in butadiene units; actual composition depends on cracker output blending, with flexible adjustment (70–100%) according to available C4 stream feeds and desired butadiene content

Downstream process integration

• Hydrocarbons undergo vapor-phase catalytic dehydrogenation over metal oxide catalysts; product gas passes through extractive distillation to isolate purified 1,3-butadiene from co-generated C4 species

Final product types

• Styrene-butadiene rubber (SBR), polybutadiene (PBR) elastomers, nitrile rubber, acrylonitrile butadiene styrene (ABS), latex binders

3. Alkylation Agent for High-Octane Gasoline Blending

Refineries use cis-2-butene as an olefinic feedstock in sulfuric acid or hydrofluoric acid-catalyzed alkylation units to manufacture alkylate, a premium hydrocarbon blending component that raises gasoline’s anti-knock rating. The isomer ratio and degree of conversion influence the octane enhancement and final fuel properties, with process control tailored to meet clean fuels regulations.

Industry compliance standards

• ASTM D4814 (Standard Specification for Automotive Spark-Ignition Engine Fuel – U.S. gasoline blending)
• EN 228 (European gasoline specification for unleaded petrol)
• EPA Mobile Source Air Toxics (MSAT) rules (U.S. Clean Air Act compliance)
• API 1509 (American Petroleum Institute Quality Management System)

Typical usage ratio

• Typically 20–35% of total olefin input to alkylation reactors, optimized by isomeric composition and refinery balance of C4 cuts

Downstream process integration

• Injected with isobutane into acid-catalyzed alkylation reactor; controlled conversion yields C8+ branched-chain hydrocarbons, followed by caustic and water washes, fractionation, and gasoline pool blending

Final product types

• Alkylate gasoline, premium unleaded fuel, aviation gasoline fractions

4. tert-Butyl Alcohol (TBA) and Methyl Tert-Butyl Ether (MTBE) Intermediate Synthesis

Cis-2-Butene undergoes hydration or etherification to form t-butanol (TBA) and methyl tert-butyl ether (MTBE), employed primarily as oxygenates and octane boosters in fuels. The process demands exacting feedstock specifications to control byproduct formation and to meet stringent purity requirements in global fuel supply chains.

Industry compliance standards

• ASTM D4806 (Denatured fuel ethanol for blending with gasoline)
• UNE 53510 (MTBE quality requirements for fuel use in Europe)
• U.S. EPA Regulation 40 CFR Part 80 (Oxygenate blending requirements)
• ISO 22241 (Handling of fuel additives)

Typical usage ratio

• 60–80% blend of C4 olefins in MTBE production trains, determined by reactor performance and MTBE yield targets; hydration to TBA uses similar input ratios but adjusted based on desired output specification

Downstream process integration

• Direct injection into fixed-bed reactors for acid-catalyzed etherification or hydration; downstream separation units purify MTBE or TBA fractions before integration into gasoline or chemical sectors

Final product types

• MTBE for gasoline blending, TBA solvents, fuel oxygenates, high-purity tert-butyl esters

5. Telomerization and Specialty Chemical Derivatives

Producers of specialty chemicals utilize cis-2-butene in telomerization reactions to manufacture n- and iso-octenes and higher-value intermediates for fine chemicals, fragrance ingredients, and specialty plasticizers. Reactor design and catalyst type govern selectivity and minimize challenging byproducts, with ongoing compliance audits in sensitive end-use applications.

Industry compliance standards

• ISO 9001:2015 (Quality management systems for chemical production)
• IFRA Standards (International Fragrance Association limits for ingredients)
• OECD Guidelines for the Testing of Chemicals (For new derivative registration)
• REACH Registration (Substance-specific dossier for EU trade)

Typical usage ratio

• Varies from 10–40% as core olefin; concentration depends on end-product target (octenes, nonenes, decenes) and reactor selectivity

Downstream process integration

• Used as starting olefin for telomerization with nucleophiles (e.g., alcohols, phenols) or oligomerization processes; fractionation and purification deliver intermediates for formulation

Final product types

• Fragrance ingredient intermediates, specialty alkylated aromatics, plasticizer alcohols, branched alkanes

6. Agrochemical Intermediate Production

Cis-2-Butene serves as a base olefin in synthesizing key agrochemical intermediates such as butenyl chlorides, exploited in herbicide and plant protection agent manufacturing. Chemical purity and reactivity profile are tightly controlled to meet downstream synthesis requirements and mitigate impurities that affect crop safety regulations.

Industry compliance standards

• FAO/WHO Codex Alimentarius (Pesticide and chemical residue limits)
• ISO 9001 (Quality management for agrochemical production)
• EU Regulation (EC) No 1107/2009 (Placing plant protection products on the market)
• US EPA 40 CFR Part 180 (Tolerance for pesticide chemical residues)

Typical usage ratio

• Routinely 15–30% by mass in halogenation or addition reactions, adjusted for intended crop spectrum or derivative complexity

Downstream process integration

• Direct chlorination of butene under controlled temperature and pressure yields intermediates; subsequent transformations deliver active agrochemical entities

Final product types

• Herbicide active ingredients, growth regulators, pesticide formulation intermediates, fine chemistry reference standards