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Ethylhexanol is an organic compound with the molecular formula c8h18o, CAS 104-76-7, It is a colorless flammable liquid with a special odor. It is miscible with alcohols, ethers, and chloroform and can dissolve in about 720 times the amount of water. At 20 ℃, its solubility in water is only 0.1%. The azeotrope formed with water has a boiling point of 99.1% and a water content of 20%. Used in the production of plasticizers, defoamers, dispersants, mineral processing agents, petroleum additives, as well as in printing and dyeing, coatings, films, and other fields.
Mainly used for the production of plasticizers, the main products include: dioctyl phthalate (DOP), dioctyl oxalate (DOA), trioctyl trimellitate (TOTM), as well as ester plasticizers of dicarboxylic acids such as phthalic acid, azelaic acid, and sebacic acid, and cold resistant auxiliary plasticizers. It is also used in the production of surfactants, dispersants, lubricants, emulsifiers, antioxidants, beneficiation agents, finishing agents, and petroleum additives.
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Chemical Formula |
C8H18O |
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Exact Mass |
130 |
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Molecular Weight |
130 |
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m/z |
130 (100.0%), 131 (8.7%) |
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Elemental Analysis |
C, 73.78; H, 13.93; O, 12.29 |
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It also known as isooctanol, is an important organic compound with a wide range of applications.
1. Plasticizer production
It is a key raw material for producing plasticizers. Plasticizers are mainly used to increase the flexibility, elasticity, and processability of plastics. The plasticizers produced from this substance mainly include dioctyl phthalate (DOP), trioctyl trimellitate (TOTM), dioctyl azelaic acid, and dioctyl sebacic acid. These plasticizers play an important role in the plastic industry, especially in the production of polyvinyl chloride (PVC). As the main plasticizers, they can significantly improve the performance of plastics. At the same time, they can also be used as cold resistant auxiliary plasticizers, defoamers, dispersants, etc., to meet different application requirements.
(1) Di (2-ethylhexyl) phthalate (DOP):
As the main plasticizer for PVC, DOP accounts for approximately 95% of its total consumption in PVC. It has the characteristics of good compatibility, high plasticizing efficiency, low volatility, low temperature, good softness, and good heat and corrosion resistance.
In addition to being used in PVC, DOP can also be used for plasticizing various resins such as vinyl acetate resin, vinyl chloride vinyl acetate copolymer, polystyrene, polyvinyl acetate, nitrocellulose, ethyl cellulose, polymethyl methacrylate, etc.
(2) Trimethylhexyl trimellitate (TOTM):
TOTM is a high-performance plasticizer with excellent heat resistance, cold resistance, electrical insulation, and pull-out resistance. It is mainly used in plastic products that require high heat resistance, such as wires and cables, automotive parts, household appliances, etc.
Compared with DOP, TOTM has superior performance in terms of heat resistance, low volatility, oil resistance, and solvent extraction resistance.
It can also be used as a solvent and dispersant. Due to its excellent solubility and dispersibility, it can be used in the dissolution and dispersion processes of various chemicals.
(1) Solvent:
It can dissolve various organic and inorganic substances, and is therefore often used as a solvent in chemical reactions.
In industries such as coatings, paints, inks, etc., it can be used as a diluent or carrier solvent to help adjust the viscosity and flowability of coatings.
(2) Dispersant:
It can be used as a dispersant in the dispersion process of powder materials such as pigments, dyes, and fillers. It can effectively reduce the agglomeration phenomenon of powder materials in water or organic solvents, improve dispersion uniformity and stability.
3. Defoamers and emulsifiers
2-ethylhexanol also has significant effects in defoaming and emulsification.
(1) Defoamer:
In the process of chemical production, a lot of foam is often produced. These foam will not only affect production efficiency and product quality, but also may cause damage to equipment. It can be used as defoamer to effectively destroy and inhibit the formation of foam.
In printing and dyeing, paper making, coating and other industries, it is often used as defoamer to eliminate foam problems in the production process.
(2) Emulsifier:
Emulsifier is a substance that can reduce the surface tension between two immiscible liquids. It has certain emulsifying properties and can help two immiscible liquids form a stable emulsion.
In the food industry, it can be used as an emulsifier to help oil and water form a stable emulsion, improving the stability and taste of food.
4. Edible spices and daily chemicals
It is also widely used as a raw material for edible spices and daily chemicals.
(1) Edible spices:
It has a special aroma and taste, and is often used as a spice ingredient in the food industry. It can be used in the production and processing fields of baked goods, ice cream, candies, beverages, etc., adding flavor and aroma to food.
In the spice industry, it can also be blended with other spice ingredients to produce essence products of various flavors and flavors.
(2) Daily chemical products:
In the cosmetics industry, it can be used as a moisturizer, softener, or solvent to help improve the texture and stability of cosmetics.
In the detergent industry, it can be used as one of the ingredients of surfactants or additives to help improve the cleaning effect and stability of detergents.
5. Other industrial applications
In addition to the main uses mentioned above, it also plays an important role in other industrial fields.
(1) Petroleum additives:
In the petroleum industry, it can be used as a petroleum additive to help improve the performance and quality of petroleum products. For example, it can be used as one of the components of rust inhibitors, antioxidants, or dispersants to improve the antioxidant, detergent, and dispersibility of petroleum products.
(2) Lubricant additives:
In the lubricant industry, it can be used as one of the components of extreme pressure anti-wear agents or antioxidants to help improve the extreme pressure anti-wear and antioxidant properties of lubricants. This helps to extend the service life of mechanical equipment and reduce maintenance costs.
(3) Mineral processing agent:
In the mining industry, it can be used as a beneficiation agent. It can effectively undergo chemical reactions or physical adsorption with useful components in ores, thereby helping to improve the sorting efficiency and recovery rate of ores.
(4) Paper sizing:
In the papermaking industry, it can be used as one of the components of paper sizing agents. It can help improve the strength and glossiness of paper, as well as enhance its printing and writing performance.
(5) Photographic material:
In the photography industry, it can be used as a solvent or additive for photographic materials. It can help improve the photosensitivity and stability of photographic materials, resulting in clearer photos and images.
(6) Rubber industry:
In the rubber industry, it can be used as one of the components of rubber additives. It can help improve the processing and physical properties of rubber products, such as tensile strength, tear strength, and wear resistance.
(7) Synthetic resin industry:
In addition to being used as a plasticizer raw material, it can also be used to synthesize other types of resin products. For example, it can react with raw materials such as phthalic anhydride to synthesize high-performance resin products such as alkyd resin.
Ethylhexanol and adipic acid can be esterified to synthesize high-performance cold resistant plasticizer di (2-ethylhexyl) adipate (DOA). DOA has an extremely low freezing point and maintains good plasticizing performance even in extreme low temperature environments of -70 ℃, without the problem of material hardening or brittleness.
It is the core plasticizer for PVC products and outdoor cold resistant rubber products used in northern high-altitude regions. A certain proportion of DOA plasticizer must be added to PVC agricultural greenhouse films and outdoor oil hoses used in high-altitude regions such as Xinjiang and Heilongjiang in China to ensure the normal use of the products in extreme low temperature environments during winter.
Core raw materials of DOP, the main plasticizer for general PVC products
Ethylhexanol and phthalic anhydride undergo esterification reaction to efficiently synthesize di (2-ethylhexyl) phthalate, commonly known as DOP plasticizer in the industry. DOP is the world's largest and most mature general-purpose plasticizer, with excellent compatibility with PVC resin. Adding a small amount can significantly reduce the intermolecular forces between PVC molecules, making the originally hard and brittle PVC material soft and highly elastic. At the same time, the material's low-temperature performance and resistance to bending are significantly improved.
Synthesis of ethyl hexanol:
Butyraldehyde was synthesized by acetaldehyde condensation, crotonaldehyde was obtained by dehydration, and n-butyraldehyde was obtained by hydrogenation. Then 2-ethyl (- 2 -) hexenal was obtained by condensation and dehydration of two molecules of n-butyraldehyde, and 2-ethyl (- 1 -) hexanol was obtained by hydrogenation.
Using propylene and synthesis gas as raw materials, butyraldehyde is produced by carbonylation reaction. 2-ethyl (- 2 -) hexenal is obtained by condensation dehydration of two molecules of butyraldehyde, and 2-ethyl (- 1 -) hexanol is obtained by hydrogenation.
Firstly, butanol aldehyde was formed by condensation of two molecules of ethanol; And then dehydration to produce butenal (crotonaldehyde), which is hydrogenated to n-butyraldehyde; Hydrogenation of n-butyraldehyde to obtain n-butanol; If it is condensed and dehydrated, 2-ethylhexenal will be generated, and the final product 2-ethylhexanol will be obtained by further hydrogenation. Alternatively, n-butyraldehyde and isobutyraldehyde can be synthesized by high-pressure carbonylation with propylene, carbon monoxide and hydrogen as raw materials and cobalt tetracarbonate as catalyst. N-butyraldehyde and isobutyraldehyde are hydrogenated with copper or nickel as catalyst. N-butyraldehyde is hydrogenated to n-butanol in gas phase or solid phase; After primary distillation, n-butanol is purified in two column distillation system. 2-ethylhexenal was prepared by condensation and dehydration of n-butanol with sodium hydroxide as catalyst. Hydrogenation of 2-ethylhexenal in the presence of nickel catalyst at a certain temperature and pressure to produce iso2-ethylhexanol
Rhodium catalyst can be used to catalyze the carbonylation of heptane to produce octanol in one step. Rhodium based catalysts rh2aco4 and [Rh (NH3) 5cL] Cl2 can be used as catalyst precursors for the reaction (phosphorus, such as tributylphosphine, should be added to the catalyst to activate the catalyst so that the main product is normal alcohol, not aldehyde)
Using coconut oil as raw material, 2-ethylheanol was obtained by high pressure hydrogenation in the presence of copper chromium catalyst.
Frequently Asked Questions
What is Ethylhexanol used for?
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2-Eethyl hexanol is used to make plasticizers for polyvinyl chloride. Reaction with phthalic anhydride gives bis(2-ethyl hexyl) phthalate (DOP, DEHP). Reaction with adipic acid gives bis(2-ethyl hexyl) adipate. Moreover, esterification with acrylic acid gives 2-ethyl hexyl acrylate for use in adhesives and paints.
What is the chemical name for 2EH?
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2-Ethylhexanol (abbreviated 2-EH) is an organic compound with the chemical formula CH 3CH 2CH 2CH 2CH(CH 2CH 3)CH 2OH. It is a branched, eight-carbon chiral alcohol. It is a colorless liquid that is poorly soluble in water but soluble in most organic solvents.
Is ethylhexyl an alcohol?
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2-Ethyl hexanol is an 8-carbon higher alcohol species. It is used to make the vinyl chloride plasticizer, bis(2-ethyl hexyl) phthalate. It is also used to make 2-ethyl hexyl acrylate for adhesives and paints.
Who makes 2-Ethylhexanol in China?
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Shaanxi Achievechem Co., Ltd.. is a leading manufacturer, supplier, and factory of high-quality 2 Ethyl Hexanol (2EH) in China. Our 2EH product is widely used as a solvent in the production of coatings, adhesives, and plasticizers.
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