Preparation method of 2-(2-hydroxyethoxy) phenol
A technology of hydroxyethoxyl and phenol, which is applied in the field of preparation of 2-phenol, can solve problems such as difficult long-distance transportation, and achieve the effects of suppressing side reactions, high yield, and high activity
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Embodiment 1
[0025] Dissolve 0.6g of praseodymium nitrate hexahydrate in 20g of water, add 20g of SAPO-11 molecular sieve, stir at room temperature for 6 hours, dry at 110°C for 12h, and then calcinate at 400°C for 4h in an air atmosphere to obtain catalyst A.
[0026] Put 10g of catalyst A in a fixed bed, under N 2 Pretreatment at 300°C for 2 h under atmosphere. Ethylene glycol and catechol are mixed according to a molar ratio of 6:1 to form a raw material liquid, and the raw material liquid is passed into a fixed bed so that the liquid hourly space velocity of catechol is 0.5h -1 , The reaction was carried out under the condition of normal pressure 210°C. After the reaction was stabilized, the product was analyzed by gas chromatography, and the specific results are shown in Table 1 below.
Embodiment 2
[0028] Dissolve 1.0g of praseodymium nitrate hexahydrate in 20g of water, add 20g of SAPO-34 molecular sieve, stir at room temperature for 8 hours, dry at 120°C for 9h, and then calcinate at 450°C for 8h to obtain catalyst B.
[0029] Put 10g catalyst B in the fixed bed, under N 2 Pretreatment at 250°C for 6h under atmosphere. Ethylene glycol and catechol are mixed into a raw material solution according to a molar ratio of 8:1, and the raw material solution is passed into a fixed bed so that the liquid hourly space velocity of catechol is 1.2h -1 , The reaction was carried out under the condition of normal pressure 270°C. After the reaction was stable, the product was analyzed by gas chromatography.
Embodiment 3
[0031] Dissolve 1.8g of praseodymium chloride in 20g of water, add 20g of SAPO-11 molecular sieve, stir at room temperature for 10 hours, dry at 130°C for 8h, and then calcinate at 500°C for 10h to obtain catalyst C.
[0032] Put 10g of catalyst C in a fixed bed, under N 2 Pretreatment at 200°C for 7h under atmosphere. Ethylene glycol and catechol are mixed into a raw material solution according to a molar ratio of 10:1, and the raw material solution is passed into a fixed bed so that the liquid hourly space velocity of catechol is 2.0h -1 , The reaction was carried out under the condition of normal pressure 300°C. After the reaction was stable, the product was analyzed by gas chromatography.
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