Low molecular weight amide/ester containing quaternary ammonium salts
a technology of quaternary ammonium salts and ester, which is applied in the direction of liquid carbonaceous fuels, lubricant compositions, fuels, etc., can solve the problems of poor efficacy of materials in modern engines, power loss and misfiring, and incomplete diesel combustion, so as to improve water shedding or demulsification performance, and enhance fuel economy
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example 1
of 550 Mn Polyisobutylene Succinic Anhydride (PIBSA)
[0234]A 550 number average molecular weight (Mn) polyisobutylene (PIB) (2840 g., 5.163 moles, mid-vinylidene PIB available from Daelim) having greater than 20% vinylidene groups is charged to a 5-liter flange flask equipped with overhead stirrer, air condenser, nitrogen inlet, thermocouple and Eurotherm™ temperature controller (reaction kit).
[0235]Maleic anhydride (632.2 g 6.449 moles) is then charged to the reaction vessel. The batch is agitated under a nitrogen blanket and slowly heated to 203° C. over a 90 minute period. The batch is maintained at 203° C. for 24 hours.
[0236]The reaction kit is then reconfigured for vacuum stripping. The batch is stripped at 203° C. and 0.05 bar to remove unreacted maleic anhydride. The batch comprising the formed PIBSA is then cooled back to 50° C. and decanted into a storage vessel.
example 2
of Quaternizable Compound—550 Mn PIBSA and 2-Dimethylaminoethanol
[0237]The 550 Mn PIBSA (1041.6 g, 1.50 moles) (product of Example 1) is charged to a 2-liter flask equipped with a water condenser, a thermocouple, a dropping funnel, an overhead stirrer and Nitrogen inlet and heated to 90° C.
[0238]2-Dimethylaminoethanol (133.71 g, 1.50 moles) is added to the flask via the dropping funnel over 60 minutes. The batch temperature is kept below 120° C. while adding the 2-dimethylaminoethanol.
[0239]Once all the 2-dimethylaminoethanol is added, the reaction maintained at 120° C. for 2 hours. The resulting product is a 550 Mn PIBSA / 2-dimethylaminoethanol quaternizable compound.
example 3 (
Prophetic)—Formation of a 550 Mn PIBSA / 2-Dimethylaminoethanol Quaternary Ammonium Salt Using Dimethyl Sulfate (an Ester / Dimethyl Sulfate Quat)
[0240]The 550 Mn PIBSA / 2-dimethylaminoethanol (595.5 g 0.76 moles) (product of Example 2) is charged to a 2 liter flask equipped with a water condenser, a thermocouple, a dropping funnel, an overhead stirrer and a nitrogen inlet.
[0241]Diluent oil (1046.6 g), such as mineral oil of type SN 100-SN 150, is added to the flask and the flask is heated to 60° C. under agitation and nitrogen atmosphere.
[0242]Dimethyl sulfate (86.6 g, 0.69 moles) is then added drop wise to the flask. An exotherm of 29° C. is noted taking the batch temperature from 60° C. to 89° C. The batch is then maintained at 90° C. for two hours before cooling back to 50° C. and decanting the ester / dimethyl sulfate quat into storage vessel.
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