Pure Benzyl Acetate CAS 140-11-4

Shaanxi BLOOM Tech Co., Ltd. is one of the most experienced manufacturers and suppliers of pure benzyl acetate cas 140-11-4 in China. Welcome to wholesale bulk high quality pure benzyl acetate cas 140-11-4 for sale here from our factory. Good service and reasonable price are available.

Pure benzyl acetate is a colorless liquid with a jasmine fragrance. CASC9H10O2, Chemical formula: c9H10O2, insoluble in water, soluble in ethanol and ether, insoluble in glycerol. This product has mild toxicity and a stimulating effect. Due to its low volatility, this product has no other adverse reactions except for local irritation to the human body. Maintain good ventilation at the operation site. Operators should wear protective equipment. Exists in tobacco, burley tobacco, spice tobacco, and mainstream smoke. The pure product is used to prepare jasmine and other floral essence and soap essence. Ordinary products are used as solvents for resins, as well as for paints, inks, etc.

Chemical property:

Benzyl acetate is hardly soluble in water and difficult to hydrolyze. When hydrolyzed with an alcohol solution of alkali in acetone solution, acetic acid and benzyl alcohol are generated. The hydrolysis rate was 10%, 35% and 46% at 20 ℃ for 1 hour, 3 hours and 5 hours respectively. Toluene and acetic acid were obtained by hydration at 180 ℃ with nickel as catalyst. Benzyl benzoate was synthesized by heating methyl benzoate with sodium ethoxide or sodium methoxide in the presence of chloroform (yield 30% ~ 50%). Benzyl acetate is chlorinated at 150 ~ 170 ℃ to form benzoyl chloride and acetyl chloride. It reacts with bromine at room temperature to form o - or p-bromobenzoyl bromide. When heated to the boiling point, bromoethane and benzoyl bromide are also formed. Benzyl acetate is heated together with sodium metal, and the product is decomposed with dilute sulfuric acid to form hydrogenated benzyl cinnamate and dibenzyl ether. Other products include cinnamic acid, benzyl acetoacetate, benzyl alcohol and toluene. Benzyl acetate can be quantitatively obtained by heating benzyl acetate with absolute ethanol or sodium acetate dehydrated at 160 ℃.

Stability:

1. The toxicity of this product is relatively mild, and the oral LD50 of rats is 2490mg / kg. It has stimulating and anesthetic effects. Mice exposed to 1.3g/m3 for 7-13 hours will suffer from dyspnea and be anesthetized to death. As the volatility of this product is low, it has no other adverse effects except local irritation to people. Keep the operation site well ventilated. Protective equipment shall be provided for operators.

2. It exists in flue-cured tobacco, burley tobacco, oriental tobacco and mainstream flue gas.

Principle of synthesis of pure benzyl acetate:

Esterification is one of the most important methods for preparing esters by the interaction between alcohol and carboxylic acid. This method is also called direct esterification. Generally, alcohol and carboxylic acid need to be heated and refluxed in the presence of a small amount of catalyst. Commonly used acidic catalysts include sulfuric acid and hydrochloric acid. However, the reaction is reversible and the reaction proceeds very slowly. In order to improve the yield of the ester, the reaction must be carried out to the right Generally, the water generated in the reaction is removed by the azeotropic method or adding a suitable dehydrating agent; Another method is to add excess alcohol or acid during the reaction to change the reaction to reach equilibrium composition of reactants and products.

Benzyl acetate is prepared by the reaction of benzyl alcohol and acetic anhydride in this experiment. The reaction is easy to proceed, and the reaction equation is as follows:

Experimental method:

Add 30g benzyl alcohol, 30g acetic anhydride and 1g anhydrous sodium acetate into a 100ml three necked flask with a spherical condenser tube, stir and raise the temperature to 110C, and reflux for 4-6h. After the reaction is cooled down, slowly add 15% sodium carbonate aqueous solution with stirring until no bubbles are released, and then wash the organic phase with 15% sodium chloride aqueous solution until it is neutral. The organic phase was separated and the crude product was dried with a small amount of anhydrous calcium chloride. Add a small amount of boric acid to the crude product for vacuum distillation (), and collect the 98 ~ 100C fraction to obtain the product. Weigh the product, calculate the yield, and measure its refractive index for inspection.

Synthesis of benzyl acetate method II:

Add anhydrous sodium acetate, benzyl chloride, catalyst tebac and distilled water in order according to the experimental design proportion in a four necked flask equipped with a stirrer, a reflux condenser and a thermometer. Turn on stirring and start heating. Accurately control the reaction temperature within the range required by the experiment, and take samples for detection until the end of the reaction. Cool the reaction to room temperature, filter the generated salt and wash it with appropriate amount of cyclohexane, combine the washed oil phase with the reaction organic phase, recover the cyclohexane sleeve for the next batch of reactions, and then distill under reduced pressure to obtain qualified products.

Benzyl acetate was synthesized by using gasified benzyl and anhydrous sodium acetate as raw materials and triethylbenzylammonium chloride (tebac) as catalyst. This process has high yield and high industrial value. In the range of technological investigation, the best reaction conditions are: when n (benzyl chloride): n (anhydrous sodium acetate): n (tebac): n (water) = 1:1.25:0.02:0.45, reaction temperature 110C, reaction time 4h, the molar yield of the product can reach 94.50%.

Pure benzyl acetate, also known as benzyl acetate or benzyl acetate, is an organic compound with the chemical formula C9H10O2. It is a colorless liquid with a rich jasmine aroma and is insoluble in glycerol. However, it is miscible with alcohols, ethers, ketones, as well as fatty and aromatic hydrocarbons.

Spice field

 

(1) Preparation of floral essence
It is the main component of jasmine and other extracts, and is an indispensable spice in the deployment of fragrant, ylang and other floral essence. Because of its relatively low price, it is mostly used for soap and other industrial essence. In jasmine, white orchid, jade hairpin, moonlight fragrance, narcissus and other essence, they are often used in large quantities. It has good compatibility, strong volatility, light and clear fragrance, which can add unique jasmine fragrance to these floral essence and make the essence aroma more rich and lasting.

(2)  Auxiliary modification and fragrance enhancement
It can not only be used as the main spice, but also help to modify the fragrance atmosphere of other floral and fantasy essence. In heavy essence such as oriental flavor, it can enhance the aroma that is difficult to penetrate, making the overall aroma of essence more harmonious and balanced. For example, in some high-end perfume, adding it can enhance the sense of hierarchy and quality of perfume, so that consumers can feel more delicate and charming fragrance when using it.

 

(3) Preparation of edible essence
It is a kind of edible spice temporarily allowed in China, and can be used to prepare a variety of fruity essence. GB 2760-1996 stipulates that it can be used to prepare jasmine, peach, apricot, raspberry, strawberry, apple, grape, plum, banana, cherry, pear, pineapple, papaya, cream and other essence. In practical applications, the dosage is generally 760mg/kg in chewing gum according to normal production needs; 34mg/kg in candy; 22mg/kg in baked goods; 14mg/kg in cold drinks; 7.8mg/kg in soft drinks. When preparing fruit flavor edible essence such as bayberry, apple, pineapple, grape, banana, strawberry, etc., they can give food a realistic fruit aroma and increase the attractiveness and taste of food.

 

(4) Market demand and widespread application
In the field of spice and essence, the market demand is strong. Among the 400 famous flavoring products, such as perfume, cosmetic essence and soap essence, their consumption ranks among the top five, and they are one of the ester perfumes used most in daily chemical essence. It is widely used in the field of daily chemicals and food. It is one of the varieties with the largest output in the synthetic flavor industry. Most of it is used in the essence formula of the daily chemical industry. Most of the domestic products are exported and mainly consumed in the Asian and European markets.

Solvent field

 

(1) Ability to dissolve multiple substances
Dissolve 0.23% by weight in water, insoluble in glycerol, but miscible with alcohols, ethers, ketones, fatty hydrocarbons, aromatic hydrocarbons, etc. It has good solubility for oils, nitrocellulose, cellulose acetate, etc., and can also dissolve rosin, glyceryl tri rosin ester, coumarin resin, etc. This wide solubility makes benzyl acetate of significant application value in the solvent field.

(2) Specific application scenarios
Insect glue paint: It can dissolve insect glue, and when mixed with alcohol, it can dissolve glycerol alcohol acid resin, etc. Therefore, it is used as a solvent for insect glue paint. In the preparation process of insect repellent paint, it can help to evenly disperse the insect repellent and improve the quality and performance of the paint film.

 

Alcohol acid resin: As a solvent for alcohol acid resin, it can adjust the viscosity and flowability of alcohol acid resin, making its application in coatings, inks and other fields more convenient and efficient.
Nitrocellulose: During the processing and use of nitrocellulose, it can dissolve and form a uniform solution, which facilitates subsequent coating, molding, and other operations.
Cellulose acetate: It has good solubility in cellulose acetate and can be used to prepare cellulose acetate films, fibers, and other products.
Dyes: In the dye industry, benzyl acetate can be used as a solvent for dyes to help them disperse and dissolve better, improving the dyeing effect.
Fats: For oily substances, they can dissolve and dilute, and are used in some oil processing and cosmetic preparation.
Printing ink: As a solvent for printing ink, it can adjust the viscosity and drying speed of the ink, improve printing quality and efficiency.

Medical field

 

(1) Synthesis of drug intermediates
In the field of medicine, it is widely used to synthesize various pharmaceutical intermediates. Although the specific synthesis routes and types of drugs may vary depending on research and practice, the chemical properties of benzyl acetate enable it to play an important role in drug synthesis. For example, it can form intermediates with specific pharmacological activities by participating in various chemical reactions such as esterification and substitution reactions, and then be used to synthesize various drugs for treating diseases.

(2) Application prospects and significance
With the continuous development and innovation of pharmaceutical technology, the demand for drug intermediates is also increasing. As an important organic synthetic raw material, it has broad application prospects in the field of medicine. It can help researchers develop more new and efficient drugs, contributing to the cause of human health.

Potential applications in other fields

 

(1) Limitations of plant extraction
Although benzyl acetate is widely present in various plants such as jasmine, ylang ylang ylang, orange blossom, and gardenia, and is also present in small amounts in high-grade cinnamon essential oil, it is difficult to extract benzyl acetate from natural plants using current plant extraction techniques. The content of this substance in natural plants is relatively low, and the extraction process is complex and costly, making it difficult to meet the needs of large-scale industrial production. Therefore, industrial production mainly adopts chemical synthesis methods.

(2) Future exploration direction
Although its applications in other fields are relatively limited at present, with the continuous advancement of science and technology and in-depth research on its properties, its potential applications in more fields may be discovered in the future. For example, in the field of materials science, it may be used to synthesize new types of polymer materials; In the field of environmental protection, it may be used as a treatment agent for certain pollutants. Researchers can further explore the chemical properties and reactivity of pure benzyl acetate, and develop more new products and processes based on this substance.

Hot Tags: pure benzyl acetate cas 140-11-4, suppliers, manufacturers, factory, wholesale, buy, price, bulk, for sale, methyltetrahydrofuran