
2-Phenyl-1-propene CAS 98-83-9
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- Appearance: Colorless liquid
- Assay: 99. 0%min
- Stock: In stock
- Sample: Available




2-Phenyl-1-propene: The Complete Guide
Index of 2-Phenyl-1-propene Contents
- Item 1: Basic Info of 2-phenyl-1-propene
- Item 2: What is 2-phenyl-1-propene?
- Item 3: 2-phenyl-1-propene Uses
- Item 4: The Manager has Something to Say
- Item 5: The synthetic route of 2-phenyl-1-propene
- Item 6: Application of 2-Phenyl-1-Propene in Organic Synthesis
- Item 7: Quality Control of 2-phenyl-1-propene
- Item 8: Hot Sale Products
- Item 9: Get 2-phenyl-1-propene Quotation
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Basic Info of 2-Phenyl-1-propene
Chemical Name: | 2-Phenyl-1-propene |
Other Name: | 1-Methyl-1-styrene; 2-phenyl-1-propene; phenylisopropene; 1-methyl-1-styrene; Styrene |
CAS: | 98-83-9 |
EINECS: | 202-705-0 |
Type: | Organic raw materials |
Molecular Formula: | C9H10 |
Molecular Weight: | 118.18 |
Melting point | −24 °C(lit.) |
Boiling point | 165-169 °C(lit.) |
Density | 0.909 g/mL at 25 °C(lit.) |
Vapor density | 4.1 (vs air) |
Vapor pressure | 2.1 mm Hg ( 20 °C) |
Refractive index | n20/D 1.539 |
Fp | 114 °F |
Storage temp. | 2-8°C |
Solubility | 560mg/l |
Form | Liquid |
Color | Clear colorless |
PH | 5-6 (500g/l, H2O) |
Explosive limit | 0.9-6.6%(V) |
Water Solubility | insoluble |
Brand Name: | Zhishang Chemical |
Provide: | 2-Phenyl-1-propene MSDS; 2-Phenyl-1-propene COA |
What is 2-Phenyl-1-propene?
2-Phenyl-1-propene, also known as α-methylstyrene (abbreviated as a-MS or AMS) or phenylisopropene, is a by-product of the production of phenol and acetone by the cumene method, generally a by-product of phenol per ton 0.045t α-MS.
2-Phenyl-1-propene is a colorless liquid with a pungent odor. The molecule contains a benzene ring and an alkenyl substituent on the benzene ring. It is prone to polymerization when heated. 2-Phenyl-1-propene can be used in the production of coatings, plasticizers, and as a solvent in organic synthesis.
2-Phenyl-1-propene Uses
- 2-phenyl-1-propene can be used in the production of coatings, plasticizers and also as a solvent.
- 2-phenyl-1-propene is used as a polymer monomer, such as toluene-butadiene rubber and high temperature plastics. It can also be used to prepare coatings, hot melt adhesives, plasticizers and synthetic musk.
- In Japan, 90% of α-methylstyrene is used as a modifier for ABS resin, and the rest is used as a solvent and raw material for organic synthesis.
- 2-phenyl-1-propene was used in organic synthesis. polymerized monomers.
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The synthetic route of 2-phenyl-1-propene
Synthesis path 1
Taking cumene as starting material, cumene is oxidized, with cumene hydrogen peroxide stream, under the situation of not concentrating the cumene hydrogen peroxide stream, at least a part is separated, and selectively in precious metal A hydrogenation reaction is carried out in the presence of a catalyst to prepare cuminol, the reactant containing the cuminol is concentrated, and a dehydration reaction is carried out in an acidic environment to prepare 2-phenyl-1-propene.
Synthesis path 2
2-Phenyl-1-propene is recovered from the phenol residue. Its device diagram is shown in the figure below. The phenol residual liquid is added to the raw material storage tank, and the phenol residual liquid is transported to the tower kettle through the pipeline through the power of the power pump. Benzene and 2-phenyl-1-propene are transported to the condenser through the reaction column, liquefied under the action of the condenser, transported to the reflux tank through pipelines, and transported to the reaction column and A tank at a ratio of 5:1 respectively , continue to heat to 250 ° C to separate out phenol and acetophenone, transport it to the condenser through the reaction tower, liquefy it under the action of the condenser, transport it to the reflux tank through the pipeline, and transport it to the reaction tank at a ratio of 5:1. tower and tank B.
The cumene and 2-phenyl-1-propene in the A tank are transported to the tower still through pipelines, and under the action of the heater, the components in the tower still are heated to separate 2-phenyl-1-propene, It is transported to the condenser through the reaction tower, liquefied under the action of the condenser, transported to the reflux tank through the pipeline, and transported to the reaction tower and the A tank in a ratio of 5:1 respectively, and the product is collected from the A tank.
Application of 2-Phenyl-1-Propene in Organic Synthesis
α-MS is the basic raw material for organic synthesis and can be used to synthesize cumene, dicumyl peroxide, p-cumylphenol, etc. α-MS hydrogenation to produce cumene was industrialized in 1980, using palladium/aluminum catalyst, the reaction was carried out in a trickle bed reactor, the conversion rate of α-MS was greater than 99%, and the by-products were very few, so the cumene was It can be directly returned to the phenol acetone production line.
Synthesis of dicumyl peroxide (DCP) by α-MS and cumene hydrogen peroxide (CHP) is another process route for DCP synthesis. Using phenol as a catalyst, the reaction temperature is 15 to 45 ° C, and the synthesis of DCP is carried out in one step. Compared with the traditional benzyl alcohol process, the reduction, water washing, and concentration processes for preparing benzyl alcohol can be omitted. The reaction formula is shown in the following figure. The p-cumyl phenol synthesized by α-MS and phenol under the action of acid catalyst is the raw material for synthesizing thermoplastics and polycarbonate.
α-MS can be used as a resin modifier to copolymerize with acrylonitrile, methyl methacrylate, maleic anhydride, etc. to produce copolymer resins with different properties. In the 1970s, there were dozens of α-MS copolymers. Appeared, the application range has penetrated into the fields of rubber, plastics, adhesives, coatings and so on. Among them, the heat-resistant modification of ABS resin by α-MS is the field with the largest consumption, and 45% of the α-MS in the market is used to synthesize ABS resin.
The most typical way to improve the heat resistance and rigidity of ABS resin is to replace styrene with α-MS. α-MS-AN copolymer can be dissolved with ABs resin in any proportion. The glass transition temperature measurement and transmission electron microscope observation show that the prepared heat-resistant ABS resin has a microscopic two-phase structure, in which α-MS-AN copolymer and SAN in the ABS graft form the continuous phase of the resin, and the rubber particles are dispersed Phase, α-MS-AN copolymer provides its heat resistance and rigidity, ABS provides toughness. Compared with general-purpose ABS resin, the thermal deformation temperature of the modified ABS resin is increased by 10~15℃.
Using α-MS as the starting material, through condensation reaction, hydroxyisopropylation reaction, chloromethyl etherification reaction and cyclization reaction, etc., the most widely used Jiale musk (its trade name) with excellent performance can be prepared. for Galaxolide). Its intermediate product, hexamethylindanol, is also a valuable fragrance after being refined. It has a strong and lasting aroma, amber, musk-like aroma, and can be directly used as a blending essence for soaps, detergents, talcum powder, etc. preparation.
Pentamethylindan can also carry out Friedel-Crafts reaction under the catalysis of aluminum trichloride, and use acid chloride as acylating agent to generate fragrances with woody, fruity, amber, and musk flavors. Pentamethylindan can also successively synthesize many new varieties such as indanol, indanone and indanether with spice value. In addition to musk galore, 2-phenyl-1-propene is also used to synthesize fragrances such as cashmidone (with a strong, persistent and sweet musky woody aroma) and solanitol (with an elegant rose aroma).
Using a solid acid capable of generating active cations as a catalyst, α-MS can be polymerized by the mechanism of ionic polymerization to obtain low molecular weight polymers. The degree of polymerization is closely related to the reaction temperature. α-MS oligomers can significantly improve the rheological properties of plastics, significantly reduce the melt viscosity of polyolefin and polyvinyl chloride resins, and have been widely used as plastic hope enhancers.
Linear dimers can be used as cross-linking aids for the production of cross-linked polyethylene. In the polymerization of acrylic coatings, adhesives, ABS, styrene, vinyl chloride, chloroprene and styrene butadiene Molecular weight regulator or chain transfer agent is used, its function is similar to dodecyl mercaptan, it can replace thiol molecular weight regulator, and it does not have the unpleasant odor of alkali alcohols. In the manufacture of lubricating oils, linear dimers can increase the friction coefficient of lubricating oils, and hexamers can be used as viscosity modifiers for petroleum lubricating oils. Linear dimer can also be used as an excellent filler for various air cleaners, deodorants, soaps, detergents, shampoo and other products.
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