Process and catalyst for purifying phenol
A catalyst, phenol technology, applied in the fields of chemistry and petrochemistry, can solve the problem of insufficient catalyst activity
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Embodiment 1
[0025] a) Preparation of catalyst
[0026] 431g ZrOCl 2 ·8H 2 The O salt was dissolved in 5.2 L of distilled water. 332mL of NH with a concentration of about 25% 4 The OH solution was dropped into the above-formed solution over 20 minutes. The resulting precipitate was filtered off and washed with water on a Buchner funnel to remove ammonium chloride. The washed precipitate was dried in a drying oven at 110°C for 24 hours. The dried precipitate was ground in a grinder and the resulting fine powder was sieved through a 180 μm sieve. The mass of the powder is 190g or 147g which is based on ZrO 2 calculate.
[0027] The powder was sulfated by treating it with 1.14 L of 1N sulfuric acid solution for 1 hour. Then, the resulting mixture was filtered to remove excess solution, and the product was dried (10 h) at 110° C. and further used for shaping.
[0028] 3 liters of 100 g / L sodium aluminate solution was used to produce pseudoboehmite. Precipitation was carried out by si...
Embodiment 2
[0039] The catalyst was prepared as in Example 1, but in the mixed powdered aluminum hydroxide, the ratio of boehmite and pseudoboehmite was 3:1 (based on Al 2 o 3 calculate). The zirconium hydroxide precipitate was sulfated with 380 ml of sulfuric acid solution. The mixed powdered aluminum hydroxide used for mixing with the powdered zirconium sulfated hydroxide was 13.9 g. The remaining parameters are the same as in Example 1.
[0040] The total content of aluminum and zirconium sulfates in the resulting baked (final) catalyst sample is 5.0% by mass based on SO 4 Calculated, the total content of aluminum oxides and sulfates is 5% by mass, based on Al 2 o 3 calculate.
[0041] The test of the obtained aluminum-zirconium catalyst used in the process of refining phenol was carried out at a temperature of 110°C and a feed rate of constant volume of raw materials for 6h -1 next. The resulting phenol had the following composition (ppm): HA<1; α-methylstyrene<1; 2-methylbenz...
Embodiment 3
[0043] The samples were taken from an aluminum zirconium catalyst whose preparation and composition are described in Example 1. According to the above method, at a temperature of 90°C and a feed rate of constant volume of raw materials V=1h -1 Test below. The obtained phenol had the following composition (ppm): HA<1; α-methylstyrene<1; 2-methylbenzofuran-58; OM<5; AP<1;
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