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Preparation method of waste plastics catalytic cracking catalyst
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A catalytic cracking and catalyst technology is applied in the field of preparation of waste plastic catalytic cracking catalyst to achieve the effects of good oil quality, high yield and simple preparation process
Inactive Publication Date: 2014-09-24
全椒县友诚塑料利用有限公司
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Problems solved by technology
According to data check, so far there is no catalyst specially used for cracking waste plastics.
Method used
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Embodiment 1
[0016] A kind of preparation method of catalytic cracking catalyst of waste plastics, it is characterized in that, comprises the following steps:
[0017] (1) In parts by weight, add 25 parts of water glass solution to 25 parts of sulfuric acid solution under vigorous stirring, the modulus of water glass solution is 3.3, make the silicon dioxide concentration reach 6%, make acidic silicon dioxide water gel slurry;
[0018] (2) After adjusting the temperature at 50°C and the pH between 6, aging the slurry to obtain a silica gel structure suitable for serving as a catalyst skeleton;
[0019] (3) In parts by weight, add 30 parts of aluminum sulfate solution to the slurry, use 55 parts of ammonia water to deposit aluminum on the silica hydrogel, filter the silica hydrogel obtained, and simultaneously use Wash with 100 parts of dilute ammoniumchloride solution to remove the adsorbed sodium, and dry it at 120°C.
Embodiment 2
[0021] (1) In parts by weight, add 20 parts of water glass solution to 20 parts of sulfuric acid solution under vigorous stirring, the modulus of water glass solution is 3.5, so that the silicon dioxide concentration reaches 3.5%, and acidic silicon dioxide water is made. gel slurry;
[0022] (2) After adjusting the temperature at 40°C and the pH between 5, aging the slurry to obtain a silica gel structure suitable for serving as a catalyst skeleton;
[0023] (3) In parts by weight, add 24 parts of aluminum sulfate solution to the slurry, use 40 parts of ammonia water to deposit aluminum on the silica hydrogel, filter the resulting silica hydrogel, and simultaneously use Wash with 50 parts of dilute ammoniumchloride solution to remove the adsorbed sodium, and dry it at 110°C.
Embodiment 3
[0025] (1) In parts by weight, add 23 parts of water glass solution to 23 parts of sulfuric acid solution under vigorous stirring, the modulus of water glass solution is 3.4, make the silicon dioxide concentration reach 5%, make acidic silicon dioxide water gel slurry;
[0026] (2) After adjusting the temperature at 45°C and the pH between 5, aging the slurry to obtain a silica gel structure suitable for serving as a catalyst skeleton;
[0027] (3) In parts by weight, add 27 parts of aluminum sulfate solution to the slurry, use 46 parts of ammonia water to deposit aluminum on the silica hydrogel, filter the resulting silica hydrogel, and simultaneously use Wash with 80 parts of dilute ammonium chloride solution to remove the adsorbed sodium, and dry it at 115°C.
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Abstract
The invention relates to the technical field of waste plastics recycling, and discloses a preparation method of a waste plastics catalytic cracking catalyst. The preparation method comprises the following steps: adding sodiumsilicate solution in sulfuric acid solution under violent stirring to ensure that the concentration of silicon dioxide reaches 3.5-6 percent to prepare acidic silicon dioxide hydrogel slurry; after regulating the temperature and pH, curing the slurry so as to obtain a silicon dioxide gel structure suitable for serving as a catalyst framework; and adding aluminum sulfate solution in the slurry, depositing aluminum on silicon dioxide hydrogel by using ammonia water, filtering the obtained silicon dioxide hydrogel, washing by using ammoniumchloride diluted solution for removing adsorbed sodium and drying. The preparation method is simple in preparation process, and safe and reliable in operation; and the obtained catalyst is high in activity, and short in reaction time; and an oil product after waste plastics are cracked is good in quality, and high in yield.
Description
technical field [0001] The invention relates to the technical field of waste plastic recycling and reuse, in particular to a preparation method of a waste plastic catalytic cracking catalyst. Background technique [0002] Waste plastic is one of the main organic solid wastes that cause environmental pollution, and it is also an important renewable resource. The recycling and utilization of waste plastics has always been an important topic in the field of environmental protection and resource regeneration. The main utilization methods include mechanical regeneration, thermal cracking, chemical utilization, incineration, and landfill. The simple mechanical recycling method is mainly suitable for relatively clean waste with a single composition. The composite mechanical recycling method can process mixed plastics that are difficult to separate into a single resin, and process them into various products by adding certain additives or other raw materials. The chemical utilizatio...
Claims
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Application Information
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