Method for preparing phenol
A kind of phenol, the said technology is applied in the field of catalyzing the direct hydroxylation of benzene, which can solve the problems of waste, benzene and benzene volatilization loss, etc.
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Embodiment 1
[0069] Get 20 grams of titanium-silicon molecular sieve TS-1, concentration is 0.01g / ml (as palladium atom) ammonium nitrate palladium complex solution and appropriate amount of hydrazine hydrate and cetyltrimethylammonium bromide are added to tetrapropyl Stir and mix in the aqueous solution of ammonium hydroxide (mass percentage concentration 10%), wherein titanium silicon molecular sieve (gram): hexadecyltrimethylammonium bromide (mole): tetrapropyl ammonium hydroxide (mole): hydrate Hydrazine (mol): ammonium nitrate palladium complex (gram, in palladium): water (mol)=100:0.005:0.5:3.0:2.0:1000. Then put it into a stainless steel sealed reaction kettle, hydrothermally treat it at a temperature of 150°C and autogenous pressure for 48 hours, filter the resultant, wash with water, dry it naturally, and continue drying at 180°C for 3 hours to obtain micropores containing precious metals Titanium silicon material A. After characterization, its composition can be expressed as 4Ti...
Embodiment 2
[0071] Get 20 grams of titanium-silicon molecular sieve TS-1, a palladium chloride solution with a concentration of 0.01 g / ml (in terms of palladium atoms), and an appropriate amount of hydrazine hydrochloride and polypropylene to join in an aqueous solution of sodium hydroxide (mass percentage concentration 15%) and stir Mix well, wherein titanium silicon molecular sieve (gram): polypropylene (mol): sodium hydroxide (mol): hydrazine hydrochloride (mol): palladium chloride (gram, in palladium): water (mol)=100:0.9: 1.8:0.15:0.1:4600. Then put it into a stainless steel sealed reaction kettle, hydrothermally treat it at a temperature of 180°C and autogenous pressure for 24 hours, filter the resultant, wash with water, dry it naturally, and continue drying at 110°C for 3 hours to obtain micropores containing precious metals. Titanium silicon material B. After characterization, its composition can be expressed as 8TiO in the form of oxides 2 100SiO2 2 ·0.006PdO·0.008Pd, the ads...
Embodiment 3
[0073] Tetraethyl orthosilicate, tetrabutyl titanate, palladium acetate solution and Tween 80 with a concentration of 0.01 g / ml (in terms of palladium atoms) were added to the aqueous solution of tetrapropylammonium hydroxide and butylenediamine (mass The percentage concentration is 10%) and stir and mix evenly, wherein the molar composition silicon source: titanium source: tetrapropyl ammonium hydroxide: butylenediamine: palladium source: protective agent: water=100:0.03:0.5:0.1:0.05: 0.02:550, silicon source is SiO 2 In terms of titanium source as TiO 2 In terms of palladium source in terms of Pd. Then put it into a sealed reactor, hydrothermally treat it at a temperature of 120°C and autogenous pressure for 120 hours, take out the resultant, filter it, dry it, and roast it to obtain an intermediate crystalline material. Transfer the intermediate crystalline material to the above remaining filtrate, add an appropriate amount of hydrazine hydrate, and then conduct a hydroth...
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