Alkyl naphthalene polysulfonate and preparation method thereof
A technology of alkyl naphthalene polysulfonic acid salt and alkyl naphthalene polysulfonic acid is applied in the field of alkyl naphthalene polysulfonic acid salt and its preparation, new anionic surfactant, can solve the problems of poor use range, limitation and the like, and achieves the The effect of reducing usage, excellent cost performance, and improving production and operation efficiency
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Embodiment 1
[0021] Add about 128 grams of naphthalene in the reaction kettle, add about 168 grams of alpha-olefins with a C number of 12, heat and wait for the naphthalene to melt, and start to slowly add 400 grams of 98% sulfuric acid (the sulfuric acid is used as both a protonic acid catalyst and a Alkyl naphthalene sulfonating agent), temperature control at 80-180°C, drop in 1-5 hours, stir for about 1 hour, measure the end point, after the end point is reached, add 10-60% of water, stir for about half an hour and then static acid After stratification, leave the oil layer to separate the waste acid water, add liquid caustic soda and a small amount of lime to neutralize, filter, and rehydrate the filtrate to about 45% of the finished product content to obtain about 1110 grams of sodium dodecyl naphthalene disulfonate , with a yield of more than 99% based on a-olefins;
Embodiment 2
[0023] Add about 128 grams of naphthalene into the reaction kettle, add about 336 grams of a-olefins with a C number of 12, and add about 16 grams of aluminum trichloride, gradually control the temperature at 80-160 ° C, keep it warm for 1-5 hours, and measure the end point After the end point is reached, filter out aluminum trichloride, add water to the filtrate to wash once, then add dilute lye to neutralize to neutral, separate the water layer and filter, and the filtered oil layer is dried with sodium sulfate and sent to Put it into the sulfonation reactor, add 200 grams of dichloromethane to the sulfonation reactor, and start to drop about 236 grams of chlorosulfonic acid, control the temperature at 15-20 ° C, and simultaneously pump out HCl gas, and react for 1 hour after adding. Raise the temperature to 50°C and measure the end point. After the end point is reached, extract dichloromethane under reduced pressure, add water, add liquid alkali and a small amount of lime ...
Embodiment 3
[0025] Add about 128 grams of naphthalene into the reaction kettle, add about 253 grams of a-olefins with a C number of 18, and add about 16 grams of solid superacid, gradually control the temperature at 80-160 ° C, keep warm for 1-5 hours, and measure the end point. After the end point is reached, filter out the solid superacid, add 100 grams of petroleum ether to the filtrate, and start to drop 348 grams of chlorosulfonic acid, control the temperature at 0-80 ° C, and extract the hydrogen chloride gas generated by the reaction at the same time, and complete the reaction 1- After 5 hours, measure the end point. After the end point is reached, depressurize and extract petroleum ether, add water to remove residual acid, add water, add liquid soda and a small amount of lime to neutralize, filter, and rehydrate the filtrate to about 45% of the finished product content to obtain octadecane The finished product of sodium naphthalene trisulfonate is about 1530 grams, and the yield ...
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