25167-67-3
Propylene-butene
CAS: 25167-67-3
Molecular Formula: C4H8
25167-67-3 - Names and Identifiers
| Name | Propylene-butene |
| Synonyms | butene N-BUTYLENE Propylene-butene |
| CAS | 25167-67-3 |
| EINECS | 246-689-3 |
25167-67-3 - Physico-chemical Properties
| Molecular Formula | C4H8 |
| Molar Mass | 56.11 |
| Melting Point | -145 °C |
| Boling Point | -1.3 °C |
| Use | Use as butene, there are three main uses, one is used as a fuel admixture, the product will be alkylated to increase the octane number, can be used as alkylated gasoline or used as a gasoline additive. The second is as a polymerization monomer, it can be oligomerization, homopolymerization and copolymerization, polybutene is a long chain mono-olefin, non-drying, non-crosslinking, can be used as oil additives, adhesives, lubricants, compressor oil, cable impregnating oil; Copolymer can be used to produce rubber, plastic, resin and gum base. The third is used as a chemical raw material, the use is very wide, n-Butene can be prepared SEC-butanol, methyl ethyl ketone, butadiene, maleic anhydride, acetic acid, pentanol and so on. Isobutene can be prepared neopentanol, pivalaldehyde, pivalic acid; As a tertiary butyl agent, preparation of tert-butyl benzene, tert-butyl Amine, tert-butyl mercaptan, P-tert-butyl toluene; Oxidation can be prepared methacrolein, methacrylic acid; Reaction with formaldehyde, preparation of isoprene; Ammoxidation of methacrylonitrile, methacrylic acid; Reaction with methanol, preparation of methyl tert-butyl ether; Used as gasoline additives; Pesticide raw materials, production of "DV pyrethroid", "permethrin", "Cypermethrin" and "permethrin", etc.; After alkylation, can prepare antioxidants, anti-aging agent, heat stabilizer; Reaction with acetic acid, preparation of butyl acetate, used as perfume; Reaction with formaldehyde, preparation of isoprene, further can be prepared a series of spices and rubber; Chlorination, can be prepared by methyl allyl chloride, β-epichlorohydrin; Hydration can be prepared by tert-butyl alcohol, further production of perfume, used as a solvent, etc.; Disproportionation, can be prepared by new hexene, further, perfume can be produced; Triisobutylaluminum, isovaleraldehyde and isoamyl alcohol can be prepared; And super absorbent gel can be prepared by reacting with maleic anhydride. After polymerization, butyl rubber, surfactants, resins, lubricating oil dispersants, and the like can be produced. |
25167-67-3 - Upstream Downstream Industry
| Downstream Products | Fumaric acid Warfarin 2-Butanol 2-(1-methylpropyl)phenol,2-sec-buty phenol Vanillic acid 2,3-Dimethyl-2-butene |
25167-67-3 - Nature
| EPA chemical information | Butene (25167-67-3) |
Last Update：2024-04-10 22:29:15
25167-67-3 - Uses and synthesis methods
physical and chemical properties
Butene, chemical formula C4H8. There are three isomers: ① 1-butene. Colorless gas, melting point -185.4 ℃, boiling point -6.3 ℃. (2) 2-butene. There are two types: cis and trans. Cis melting point -139.3 ℃, boiling point 3.7 ℃; Trans melting point -105.5 ℃, boiling point 0.88 ℃. 1-butene and 2-butene are also collectively called n-butene. (3) isobutylene. Also known as 2-methyl propylene. Colorless gas, melting point -139.0 ℃, boiling point -6.9 ℃. All three are insoluble in water, soluble in ethanol, and can form an explosive mixture with air. The explosion limit of isobutylene is 1.7 ~ 9.0% (volume). The three isomers are the main components of catalytic cracking gas, which can be separated from high temperature hot cracked petroleum gas. It is made from butanol to water in the laboratory. 1-butene and 2-butene produce butadiene (an important raw material for synthetic rubber) through dehydrogenation reaction, and n-butanol and sec-butanol are produced through hydration reaction. The hydration reaction of isobutylene can produce tert-butanol, which is oxidized to methacrolein and methacrylic acid, and oxidized to methacrylonitrile by ammonia. Isobutylene is also used in the production of polyisobutylene (used as a viscous additive to increase the viscosity of mineral lubricants). Isobutene and isobutane can be alkylated to produce high octane gasoline. Polymerization of isobutylene and isoprene can produce butyl rubber.
chemical reaction
Butene has 4 isomers, namely 1-butene [1], cis-2-butene [2], trans-2-butene [3] and isobutene [4]. The four isomers are all colorless gases. Flammable. It's explosive. Easy to liquefy. They are all components of the carbon 4 fraction in the petroleum refining process.
This product has double bonds and has typical olefin properties. It can perform electrophilic addition and free radical addition, such as alkylation reaction, hydrogenation reaction (catalytic hydrogenation), and halogen addition. During the reaction process,[4] and [1], [2], [3] Different, halogenated alkanes cannot be produced, only halogenated olefins can be obtained. When added with hydrogen halide, all four isomers can produce halogenated alkanes. When added with water, alcohol is produced. It can perform carbonyl synthesis with carbon monoxide and hydrogen to form aldehydes. Under the action of the catalyst, it can be added with aromatics to form sec-butyl aromatics. If it is added with [4], it will form tert-butyl aromatics. Under the action of the catalyst, the oxidation reaction can be carried out. According to the catalyst and oxidation conditions, ketones, acids, anhydrides, dienes or aldehydes can be generated. It can also carry out ammoxidation reaction under the action of a catalyst to form nitrile. [2], [4] can perform disproportionation reaction to form isopentene and propylene. It can react with metals, such as aluminum, to form butyl aluminum. [1], [2], [3], [4] can be transformed into each other. In the presence of initiators and catalysts, oligomerization, copolymerization and homopolymerization can be carried out. Among them, [4] has the strongest polymerization ability. It can be combined with butadiene, isoprene, styrene, cyclopentadiene, Propylene, β-pinene, etc. [4] React with formaldehyde to form isoprene. In addition, other acylation reactions can also be carried out.
category
Harmful gases
explosive hazard characteristics
Medium explosion hazard; explosive when mixed with aluminum tetrahydroborate
flammability hazard characteristics
In case of heat, open flames and oxidants are flammable; thermal decomposition discharges toxic and spicy irritating smoke
storage and transportation features
The warehouse is ventilated and dry at low temperature; stored separately from the oxidant; aluminum tetrahydroborate;
fire extinguishing agent
Cut off airflow; water, dry powder, carbon dioxide, foam, 1211 fire extinguishing agent
Last Update：2024-04-10 22:29:15
25167-67-3 - Security information
| toxic substance data | 25167-67-3(Hazardous Substances Data) |
Last Update：2024-04-10 22:29:15
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CAS: 25167-67-3
Tel: 0530-5158668
Email: xlhg102@sirloong.com
Mobile: 15153016378
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Product Name: Propylene-butene Request for quotation
CAS: 25167-67-3
Tel: 0530-5158668
Email: xlhg102@sirloong.com
Mobile: 15153016378
QQ: 694355302Send QQ message
CAS: 25167-67-3
Tel: 0530-5158668
Email: xlhg102@sirloong.com
Mobile: 15153016378
QQ: 694355302
View History
Downstream Products for 25167-67-3
Fumaric acid
Warfarin
2-Butanol
2-(1-methylpropyl)phenol,2-sec-buty phenol
Vanillic acid
2,3-Dimethyl-2-butene
Warfarin
2-Butanol
2-(1-methylpropyl)phenol,2-sec-buty phenol
Vanillic acid
2,3-Dimethyl-2-butene