Synthetic process of rubber antiager RD
A technology of rubber anti-aging agent and synthesis process, which is applied in the direction of organic chemistry, can solve the problems of not meeting the production needs of steel radial tires, not complying with environmental protection policies, and poor market competitiveness, so as to achieve shortened production cycle, low cost, and high production cycle short effect
Active Publication Date: 2011-09-28
河南省开仑化工有限责任公司
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AI Technical Summary
Problems solved by technology
At present, the traditional production process of anti-aging agent RD used in China has the disadvantages of low effective content and high cost, which cannot meet the production needs of steel radial tires, and has poor market competitiveness; the one-step synthesis process reported in some literature uses aniline and acetone as raw materials , toluene as a dehydrating agent, hydrochloric acid as a catalyst, polycondensation at a temperature of 130-140 ° C, neutralized water washing, atmospheric distillation, vacuum distillation, slicing, packaging to obtain the finished product
However, due to the use of liquid acid such as hydrochloric acid as a catalyst in the synthesis reaction, the environmental pollution is serious, the reaction produces a large amount of salty wastewater, and the production cycle is long, which does not conform to the national environmental protection policy.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0016] 50 g of aniline, 50 g of acetone, and 3 g of nanocomposite solid superacid SO 4 2- / CoFe 2 o 4 Put into the reaction kettle, react for 1 hour under the conditions of 70°C and 600 rpm, and filter out the solid catalyst to obtain the anti-aging agent RD with an effective content of 70%.
Embodiment 2
[0018] 100 g of aniline, 120 g of acetone, and 4 g of nanocomposite solid superacid SO 4 2- / CoFe 2 o 4 Add it into a reaction kettle, react for 2 hours at 95°C and 400 rpm, and filter out the solid catalyst to obtain an anti-aging agent RD with an effective content of 78%.
Embodiment 3
[0020] 150 g of aniline, 200 g of acetone, and 4 g of nanocomposite solid superacid SO 4 2- / CoFe 2 o 4 Add it into a reaction kettle, react for 3 hours at 110°C and 700 rpm, and filter out the solid catalyst to obtain an anti-aging agent RD with an effective content of 80%.
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The invention relates to a processing technique of a rubber antioxidant RD, belonging to the technical field of rubber antioxidant production. Aniline and acetone are used as reaction materials, and oxide-typed solid strong acid is used as the catalyst; while stirring, the mixture reacts 1 to 4 hours at the temperature of 70 DEG C to 165 DEG C, and the rubber antioxidant RD is obtained. The target product produced by the method of invention has high effective content, low cost, environment-protecting method and short production period without producing pollution.
Description
(1) Technical field [0001] The invention belongs to the technical field of rubber anti-aging agent production, and in particular relates to a production process of rubber anti-aging agent RD. (2) Background technology [0002] Rubber anti-aging agent RD (2,2,4-trimethyl-1,2-dihydroquinoline polymer) is a ketone-amine anti-aging agent, which is light yellow to amber powder or flakes, mainly used for rubber anti-aging agent. It is very effective in the protection of rubber thermo-oxidative aging, and has a strong inhibitory effect on the catalytic oxidation of metals. It has low toxicity and is widely used in various products of synthetic rubber and natural rubber such as chloroprene, styrene-butadiene, cis-butylene, and synthetic rubber. , because of its light yellow color, it can also be used in food and sanitary rubber products. It is a rubber antioxidant product with the largest demand in domestic and foreign markets. At present, the traditional production process of ant...
Claims
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IPC IPC(8): C08K5/3437C08L21/00C07D215/06
Inventor 苗进之刘志勇王奎亮张基础薛玉聪毛国先
Owner 河南省开仑化工有限责任公司