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- Non-stick cookware
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- Enamel kettle
- Enamel whistle kettle
- Finger bowl basin mug and plate
- Electrical pizza pan
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- Cake mold
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- S/S basket and strainer
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4-HYDROXY ACETOPHENONE the initial stage of the reaction
　　It can be seen from the figure , 4-HYDROXY ACETOPHENONE the initial stage of the reaction , with initial concentration of acetic acid increased , the yield of product is rapidly increasing, it is because as the increase of the amount of glacial acetic acid , the reaction to the positive role in promoting the reaction is constantly added large , 4-HYDROXY ACETOPHENONE the reaction speed, thereby increasing the yield ; when the amount of acetic acid exceeds 12g , the yield began to decrease . This is because when the amount of glacial acetic acid, hydroquinone amount is more than Q ( moles ) twice , 4-HYDROXY ACETOPHENONE resulting in a large number of by-products , while also appeared two acylation , leading to decreased yield of the product . Therefore, the amount of acetic acid in this experiment should be controlled at 12g.
　　Examination of the product by TLC with solvent A showed two major spots, one corresponding to the starting material (RF 0.58), and the other an acid compound corresponding to anisic acid (RF 0.66). The neutral starting substrate was removed by dissolving the mixture in 5 ml0-2 M-phosphate buffer, pH 7.0, and extracting twice with diethyl ether. The aqueous fraction was then acidified with 2 M-HCl and re-extracted with diethyl ether, which was then dried over anhydrous Na2S0, and evaporated to dryness. The product gave the same UV and IR spectra as authentic anisic acid.
　　The ether was dried over anhydrous Na2S04 and evaporated to dryness. When examined by TLC with solvents A and B the product showed up as an acid after spraying with bromocresol green,reacted as a phenol by giving a colour with diazotizedp-nitroaniline, and had the same RF values as authentic 4-hydroxybenzoic acid. The UV spectrum in 50 mwphosphate buffer, pH 7.0.