Rare earth-doped tin oxide as well as preparation method and application thereof

Abstract

The invention relates to rare earth-doped tin oxide as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a rare earth salt solution with tin oxide, so as to obtain a mixture; and calcining the mixture at 500-900 DEG C, so as to obtain rare earth-doped tin oxide. The preparation method is simple and easy in implementation, and rare earth-doped tin oxide prepared by virtue of the method is stable, large in specific surface area and high in catalytic activity to acetylsalicylic acid.

Description

technical field

[0001] The invention relates to the technical field of chemical industry, in particular to a rare earth-doped tin oxide and its preparation method and application. Background technique

[0002] Acetylsalicylic acid, also known as aspirin, is an antipyretic and analgesic drug. It is usually used to treat colds, fever, headache, toothache, joint pain, rheumatism, and also to prevent and treat ischemic heart disease, angina pectoris, cardiopulmonary infarction, and cerebral thrombosis.

[0003] The classic preparation method is to acylate salicylic acid with acetic anhydride or acetyl chloride under the catalysis of concentrated sulfuric acid. Although the process is mature, the product yield is low. Therefore, in the process of improving the synthesis process of acetylsalicylic acid, it has become a research hotspot both at home and abroad to seek a catalyst with high catalytic activity to synthesize acetylsalicylic acid. Contents of the invention

[0004] ...

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