Preparation method of catalyst for synthesizing dichloropropanol by glycerin method
A technology of dichloropropanol and catalyst, which is applied in the field of preparation of catalysts for synthesizing dichloropropanol with glycerol method, can solve the problems of difficult catalyst recovery, complicated separation process, and large environmental pollution, and achieves easy separation and simple preparation method , the effect of reducing production costs
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0009] Embodiment 1: according to attapulgite: water=1: 20 mass ratio, get attapulgite and soak in water for 24 hours, stir, cross 120 mesh sieves, add mass concentration 7% dilute hydrochloric acid to the filtrate to adjust PH to be 3, leave standstill for 12 hours, washed with water until neutral, centrifuged, dried at 120°C, and roasted at 250°C for 3 hours to obtain modified attapulgite; use ethyl orthosilicate, deionized water, absolute ethanol, modified attapulgite, The mass ratio of tungstic acid is 14:25:20:0.8:0.56 into the reactor, stirred at 50°C until gel is formed, aged for 24 hours, dried at 80°C for 5 hours, and calcined at 260°C for 4 hours to obtain the catalyst.
[0010] Use the catalyst of Example 1 to catalyze the synthesis of dichloropropanol: take 50g of glycerin, take by weighing 1.5g of the catalyst of Example 1 (by 3% of the glycerin mass), add it to the reaction tank equipped with stirring, temperature measurement and water separation device In the co...
Embodiment 2
[0011] Embodiment 2: according to attapulgite: water=1: 20 mass ratio, get attapulgite and soak in water for 12 hours, stir, cross 120 mesh sieves, add mass concentration 7% dilute hydrochloric acid to the filtrate to adjust PH to be 4, leave standstill for 12 hours, washed with water until neutral, centrifuged, dried at 120°C, and roasted at 280°C for 3 hours to obtain modified attapulgite; use ethyl orthosilicate, deionized water, absolute ethanol, modified attapulgite, The mass ratio of tungstic acid is 14:28:22:0.9:1.67 into the reactor, stirred at 50°C until gel is formed, aged for 24 hours, dried at 90°C for 5.5 hours, and calcined at 270°C for 5 hours to obtain the catalyst.
[0012] The catalyst of Example 2 was used to catalyze the synthesis of dichloropropanol, the reaction conditions were the same as in Example 1, the yield of the catalyst for the first catalysis was 92.8%, and the yield of the fifth repeated use was 90.3%.
Embodiment 3
[0013] Embodiment 3: according to attapulgite: water=1: 20 mass ratio, get attapulgite and soak in water for 24 hours, stir, cross 120 mesh sieves, add mass concentration 7% dilute hydrochloric acid to the filtrate to adjust PH to be 4, leave standstill for 12 hours, washed with water until neutral, centrifuged, dried at 120°C, and roasted at 310°C for 3 hours to obtain modified attapulgite; use ethyl orthosilicate, deionized water, absolute ethanol, modified attapulgite, The mass ratio of tungstic acid is 14:30:23:1:2.78 into the reactor, stirred at 50°C until gel is formed, aged for 24 hours, dried at 100°C for 6 hours, and calcined at 280°C for 6 hours to obtain the catalyst.
[0014] The catalyst of Example 3 was used to catalyze the synthesis of dichloropropanol, the reaction conditions were the same as in Example 1, the yield of the first catalysis of the catalyst was 94.5%, and the yield of the fifth repeated use was 92.6%.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More