Process for producing polymerization type hindered phenol antioxidant 616
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An anti-aging agent and hindered phenol technology, applied in the chemical industry, can solve the problems of deep color, many by-products, waste liquid and waste residue polluting the environment, etc., achieve the effect of light color, reduce equipment corrosion, and have a wide range of applications
Inactive Publication Date: 2009-04-08
SANMENXIA XIAWEI CHEM
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Problems solved by technology
However, affected by the choice of catalyst, the product has more by-products and darker color, and the catalyst causes a large amount of waste liquid and waste residue to pollute the environment
Method used
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example 1
[0012] Example 1: Under normal pressure, in a 500ml four-neck flask equipped with a stirrer, reflux condenser, and thermometer, add 130g of p-cresol and 2g of boron trifluoride ether catalyst, heat to 80°C, and dissolve 46g of dicyclopentanyl After 2 hours of dropwise addition of diene, 66g of p-cresol was recovered by vacuum distillation, 200ml of xylene and 3g of concentrated sulfuric acid were added, heated to 70°C, after adding 50g of isobutylene, at 80°C, 20g of activated clay was added, and kept stirring for 1 hour , lower the temperature to 60°C for suction filtration, and wash the filter cake with 30°C hot toluene, distill the filtrate together, steam to 150°C under normal pressure, start the vacuum distillation, and no longer recover the solvent at 180°C, pour the synthetic product into the Porcelain plate, knot flakes, white powder after grinding, to get the product.
example 2
[0013] Example 2: In a 500L glass-lined reactor with a reflux condenser, add 123kg of p-cresol and 2kg of boron trifluoride etherate catalyst, heat to 76°C, and drop 40kg of dicyclopentadiene in 3 hours. , recover 52kg of p-cresol under reduced pressure, add 220L of toluene, 2.5kg of concentrated sulfuric acid, heat to 70°C, add 50kg of isobutylene, add 25kg of activated clay at 80°C, keep stirring for 2 hours, drop to 60°C for hot suction filtration , and wash the filter cake with 30°C hot toluene, combine and distill the filtrates, first steam to 160°C under normal pressure, then steam to 180°C under reduced pressure, after recovering the solvent, release the product into a stainless steel plate while it is hot. Formed into tablets, it becomes white powder after crushing, and the product is obtained.
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Abstract
The invention discloses a method for preparing a polymeric hindered phenol antioxidant 616, which pertains to the chemical technology field. Under normal pressure in an acid and alkali resistant container at a temperature of 60 DEG C to 120 DEG C and under the catalysis of a boron trifluoride etherate complex, dicyclopentadiene is dripped into cresol and dicyclopentadiene to carry out a condensation reaction to generate a petroleum resin; then at the temperature of 60 DEG C to 100 DEG C, a benzene solvent is added and under the catalysis of concentrated sulphuric acid, isobutene is added to carry out an alkylation so as to generate an antioxidant 616; then at the temperature of 70 DEG C to 80 DEG C, activated clay is added and stirred for 1h to 2h, decatalyzation and decoloration are carried out, a filter cake is filtered and recovered, and decompression is conducted and the benzene solvent is recovered so as to obtain a solid; and the solid is ground into a white powder, which is the product. The method can reduce equipment corrosion and environmental protection and the product obtained has the advantages of being light in color and having high quality and wide application range and the like.
Description
technical field [0001] The invention relates to a preparation method of anti-aging agent 616, in particular to a preparation method of polymerized hindered phenol anti-aging agent 616, which belongs to the technical field of chemical industry. Background technique [0002] Antiaging agent 616 is a polymeric hindered phenol, which is an important phenolic antiaging agent with high activity, low volatility, multi-purpose and non-polluting. Widely used in natural rubber, synthetic rubber, etc. Especially suitable for non-polluting light-colored natural or synthetic rubber (chloroprene, polybutadiene, modified polybutadiene, EPDM, synthetic polyisoprene, polyurethane, etc.), also suitable for latex products, dry rubber products and Binder is an ideal phenolic anti-aging agent product instead of anti-aging agent 264 and anti-aging agent 2246. For domestic research on anti-aging agent 616, see the article "Synthesis and Application of Polymerized Hindered Phenol Antioxidant" by ...
Claims
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Application Information
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