2023/03/20

Brief description of benzoic acid application areas

It is mainly used for antifungal, disinfection and anticorrosion, for the production of medicines, dye carriers, plasticizers, spices and food preservatives, etc. It is also used for the performance improvement of alkyd resin coatings, and also as a rust inhibitor for steel equipment, agricultural Chemicals.

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2023/01/03

Benzaldehyde preparation method and use

Add 90mL of 5% active chlorine sodium hypochlorite solution to a 500mL three-necked flask, adjust the pH to 9~10 with sulfuric acid and potassium carbonate, add 4.5g of 10% tetrabutylammonium bromide solution, 3.0mL of benzyl alcohol, and 75mL of dichloromethane , The reaction was stirred at room temperature for 2h. The organic phase was separated, the aqueous phase was extracted with dichloromethane 3 to 4 times, and the extract was combined with the organic phase. Dry with anhydrous magnesium sulfate, distill off the solvent, distill under reduced pressure, collect the fraction at 60~62℃/1333Pa, which is benzaldehyde.

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2022/11/24

Benzyl alcohol action and use

Benzyl alcohol is a very useful fixative, and it is an indispensable spice when blending jasmine, moonshine, ylang-ylang and other flavors. For the preparation of soap; daily cosmetic essence. However, benzyl alcohol can be oxidized slowly and naturally, and a part of it will form benzaldehyde and benzyl ether, which makes the commercially available products often have an almond fragrance, so it is not suitable for long-term storage. Benzyl alcohol has many uses in the production of industrial chemicals. Used as paint solvent; photographic developer; polyvinyl chloride stabilizer; medicine; synthetic resin solvent; solvent for vitamin B injection; preservative for ointment or liquid medicine. It can be used as nylon filament; desiccant for fiber and plastic film, dye; cellulose ester; solvent for casein, intermediate for preparing benzyl ester or ether. At the same time, it is used for making pens (ballpoint pen oil); paint solvents, etc.

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2022/08/18

What are the methods of benzyl alcohol preparation?

It is obtained by heating and hydrolyzing benzyl chloride under the catalysis of alkali. Specifications of spice grade benzyl alcohol (QB792-81): relative density 1.041-1.046, refractive index 1.538-1.541, boiling range 203-206°C distillate over 95%, solubility completely soluble in 30 times the volume of distilled water, containing Alcohol content ≥ 98%, chlorine test (NF) is a side reaction. Raw material consumption quota: benzyl chloride 1600kg/t; soda ash 1000kg/t.

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2022/05/19

Benzaldehyde disposal storage precautions

Operation precautions: airtight operation, full exhaust. Operators must undergo special training and strictly abide by the operating procedures. It is recommended that the operator wear a self-priming filter gas mask (half mask), chemical safety goggles, anti-poison infiltration overalls, and rubber oil-resistant gloves. Keep away from fire and heat sources, and smoking is strictly prohibited in the workplace. Use explosion-proof ventilation systems and equipment. Prevent vapors from escaping into workplace air. Avoid contact with oxidizing agents and acids. Handle under nitrogen. When handling, load and unload lightly to prevent damage to packaging and containers. Equipped with corresponding types and quantities of fire-fighting equipment and leakage emergency treatment equipment. Empty containers may be harmful residues.

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2022/03/25

Benzyl benzoate synthesis method

Alcohol exchange method is currently used in the fragrance industry to produce benzyl benzoate. Alcohol exchange with ethyl benzoate and benzyl alcohol.

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