Shaanxi BLOOM Tech Co., Ltd. is one of the most experienced manufacturers and suppliers of 1,6-hexanediol cas 629-11-8 in China. Welcome to wholesale bulk high quality 1,6-hexanediol cas 629-11-8 for sale here from our factory. Good service and reasonable price are available.
1,6-Hexanediol is a colorless crystalline solid, liquid above 43 ℃, soluble in water and ethanol, slightly soluble in hot ether and insoluble in benzene. It is an important chemical raw material and one of the important raw materials for various organic synthesis. Keep away from oxidizing agents, reducing agents, acidic chlorides, anhydrides and chloroformates. 1,6-2 diol has two hydroxyl groups at the end of the carbon chain and has high activity. It can react with organic acids, isocyanates and anhydrides to form different types of derivatives. 1,6-2 diol is a new fine chemical raw material. It is more and more widely used in UV curing coatings, polyurethane, polyester, plasticizer, pesticide, medicine, dyes and other fields. It is mainly used to improve the mechanical strength of products and improve the properties of products such as hydrolysis resistance, heat resistance and chemical corrosion resistance.
In recent years, the consumption of HDO in China has been increasing. In 2016, the demand reached 16.6 KT (including 1,5-pentanediol), but it still mainly relies on imports and shows a year-on-year growth trend. The import volume was 9 KT in 2012 and increased to 10.0 KT in 2016. With the development of the downstream industry of 1,6-2 diol and the continuous expansion of the application field of HDO in China, the market demand continues to grow, and the market and development space are very broad.
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CF |
C6H14O2 |
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EM |
118 |
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MW |
118 |
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m/z |
118 (100.0%), 119 (6.5%) |
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EA |
C, 60.98; H, 11.94; O, 27.08 |
This process refers to the process of direct hydrogenation reduction of adipic acid to hexanediol without esterification. The process route is shown in the figure.
The process is mainly divided into two steps. First, adipic acid ester derivatives (such as dimethyl adipate, dibutyl adipate, dialkyl adipate, etc.) are obtained by esterification of 2-diacid, and then adipic acid ester derivatives are hydrogenated to obtain hexanediol. The process route is shown in the figure. The difficulty lies in the development of hydrogenation catalyst.
The preparation of HDO from bio based raw materials is a rising process in recent years. It mainly uses renewable resources as raw materials to prepare 1,6-2 diol, which is environmentally friendly, so it has a good application prospect.
Dancheng caiang Sugar Co., Ltd. proposes that 1,6-2 diol and other products can be obtained by hydrocracking sorbitol aqueous solution (sorbitol mass fraction is 30% ~ 50%, pH is 11 ~ 13) at 180 ~ 230 ° C and 8 ~ 11 MPa under the action of nickel / cobalt catalyst. After dehydration, separation and purification of the cracked mixture, a single 1,6-2 diol product can be obtained.
Nutil DuPont has developed a method for preparing 1,6-2 diol with l-glucosinone. Pt / w / TiO2 (PT loading accounts for 4% of the total mass of the catalyst, and the molar ratio of Pt and W is 1:1) catalyst and substrate levoglucone were placed in a reaction kettle, and the catalyst was first placed at 60 ° C, 5.52
The yield of 1,6-21 - alcohol was 62% after reaction for 2 h under the condition of MPa and then increasing the temperature to 180 ° C for 4 h.
Hydrocarbon research proposes to prepare HDO from 5-hydroxymethylfurfural. Firstly, paper, wood and straw were decomposed in acid solution, and then further hydrolyzed to obtain 5-hydroxymethyl furfural; Then 5-hydroxymethylfurfural and H2 were catalyzed by Raney Ni (or chromium)
2,5 -- C hydroxymethyltetrahydrofuran was obtained by the reaction at 100 ~ 200 ° C under the action of the catalyst; Finally, 2,5-dihydroxymethyltetrahydrofuran was hydrogenated at 200-350 ° C and 6.89-137.89 MPa in a fixed bed reactor using copper chromate catalyst to obtain 1,6-2 diol.
6. Preparation of HDO from epoxy butene
BASF Co., Ltd. reacts epoxy j-ene in the presence of replacement catalyst ruci2pcy3 (CY is cyclohexyl) under the conditions of 23 ° C, argon protection and - constant pressure (at least epoxy butene can exist in liquid form) for 23 h to remove ethylene to obtain dicyclohexene La and 1B (see Fig. 5). The conversion rate is 3.5%, and the total selectivity of dicyclohexene La and IB is 15%. In the presence of reduction catalysts (such as Pd / C, Pt / C, re / C, Cu / C, Cu / SiO2, Ni / C, etc.), dicyclohexene La and 1b were prepared at 40 ~ 50 MPa and 20 ~ 150. It reacts with H2 for 1 ~ 2 h at C, and all of them are converted into HDO.
1,6-hexanediol is used to produce polyurethane, unsaturated polyester, plasticizer, hardener of gelling agent, thermal stability qualitative improver of lubricating oil, etc. It is also used in the production of pesticide pyrethroids, organic peroxides, cyclic musk, polyethylene plastic crosslinking agents and polyether rubber.HDO, whether used as a synthetic raw material or an improver, endows products with excellent comprehensive performance, such as enhanced flexibility, impact resistance, impact resistance, and color stability. And its excellent low-temperature performance and hydrolysis resistance make the application market of HDOvery extensive. Mainly used in UV coatings, polyurethane adhesives, polyester fields, and plasticizers.
Polyurethane: Polyurethane elastomer is widely used in synthetic rubber, elastic fiber, synthetic leather and other fields. HDO can be applied to polyester resin to modify polyurethane elastomer. The modified resin has excellent mechanical strength, water resistance, heat resistance and oxidation resistance.
Polyester field: Since the carbon chain of HDO unsaturated polyester is more difficult to hydrolyze than other unsaturated polyesters with short chain alcohols, and the softness is better, the alkali resistance of the resin can be improved and the adhesion between the resin and glass fiber can be improved. In terms of saturated polyester, the polyester prepared from HDO and 4,4-dicarboxyl-diphenylsulfonic acid has high tensile strength and high elasticity. Excellent solvent resistance and swelling resistance, especially suitable for photographic substrates. The polyester of HDO and terephthalic acid is suitable for the treatment of polyester fibers.
Synthetic resin additives: Compared with plasticizers with low molecular weight, plasticizers with HDO have excellent performance in volatility resistance, oil spray frost resistance, migration resistance and low temperature resistance, and can be widely used in plastics, rubber, epoxy resin and other materials.
UV coating: UV coatings are currently the most widely used field of HDO, and people's pursuit of environmental protection and high-quality living has accelerated its application. HDO and acrylic acid were synthesized through esterification reaction under the action of a catalyst.
The addition of this active monomer gives this type of UV coating a series of excellent properties, including low viscosity, fast curing speed, low volatility, flexibility, hydrolysis resistance, heat resistance, and resistance to chemical reagents.
Polyurethane adhesive: Polyurethane adhesive has good toughness, adjustability, simple bonding process, excellent low-temperature resistance, and excellent stability. It is precisely because of the excellent bonding performance and adaptability to various substrates of polyurethane adhesive.
Polyurethane adhesives produced from HDO as raw material have better low-temperature resistance and stability than adhesives produced from other alcohol raw materials. For example, yellow resistant adhesives.
Epoxy resin: The resin cured with 1,6-hexanediol as the curing material has better mechanical properties such as tensile strength, flexural strength, compressive strength, impact strength, and adaptation period than ordinary cured resins (such as those cured with monodioxyglycidyl ether).
In addition, HDO, as a bifunctional active diluent of epoxy resin, when mixed with epoxy resin, can greatly reduce the viscosity, shrinkage rate, and cost of the system. This product is also a water-soluble active diluent with good wetting ability. Its addition can improve the infiltration force during casting and has good wetting ability during lamination and bonding. Can be used to improve the flexibility of products.
Polyurethane elastomer: Polyester polyurethane has good mechanical strength and heat resistance, but at the same time, polyester polyurethane has hydrophilicity, is easy to oxidize, is susceptible to acid and alkali effects or hydrolysis caused by humid air, and lacks stability. Polyurethane made from HDO overcomes shortcomings such as easy hydrolysis and insufficient stability. Applied to the production of various mechanical products, such as automotive components, solid tires, etc.
One of the primary uses lies in the production of polyurethanes. As a polyol, it reacts with diisocyanates to form polyurethane elastomers, foams, and adhesives, which are widely used in furniture, automotive, construction, and footwear industries due to their durability, flexibility, and resistance to wear and tear.
In addition, it serves as a valuable ingredient in personal care products. Its excellent emollient and humectant properties make it an ideal choice for moisturizing creams, lotions, and hair care formulations, enhancing skin hydration and softness without leaving a greasy feeling.
Moreover, this compound finds applications in the manufacturing of polyesters, coatings, and lubricants. Its use in polyesters, particularly those designed for high-performance fibers and films, offers improved tensile strength and dimensional stability. In coatings, it helps to formulate flexible and durable paints and varnishes. As a lubricant additive, it enhances the performance of lubricants in extreme temperature conditions.
FAQ
What is 1,6-hexanediol used for?
1,6-hexanediol is a versatile chemical compound commonly used in the polymer industry. It is used as a building block or monomer for the synthesis of various polymers and polymer-based materials. For instance, it can be used in the production of polyesters, polyurethanes, and polyamides, among others.
Is 1,6-hexanediol an alcohol?
Hexane-1,6-diol is a diol that is hexane substituted by hydroxy groups at positions 1 and 6. It is a primary alcohol and a diol. It derives from a hydride of a hexane.
Is hexanediol a paraben?
1,2 hexanediol is a diatomic alcohol and solvent, a synthetic substitute for parabens, widely used in cosmetics. Due to its antiseptic and solvent properties, it is added to gels and lotions, it is contained in some creams and shampoos.
What is hexanediol used for?
Uses. 1,6-Hexanediol is widely used for industrial polyester and polyurethane production. 1,6-Hexanediol can improve the hardness and flexibility of polyesters as it contains a fairly long hydrocarbon chain.
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