摘要:
A new class of useful gasoline additives is prepared via two consecutive reactions including: (1) amidation of water-soluble hydrophilic, low molecular weight triamine with alkyl acetate at an elevated temperature under N2 pressure to prepare a symmetrical triamide; and (2) alkoxylation of the triamides with 1,2-epoxyalkane to prepare poly(oxyalkylene)triamide alkoxylate of three telechelic hydroxy groups, having the general formula: wherein x, y and z are from 1 to 20, R is poly(oxyalkylene) of a molecular weight from 72 to 1000, and R′ is an alkyl having a carbon number from 2 to 18.
摘要:
An improved process to prepare poly(oxyalkylene)amide for gasoline additives involves three consecutive reactions. The reactions are (1) amidation of water-soluble low molecular weight of polyalkylene polyamine with alkyl acetate at an elevated temperature under N2 pressure to convert amines to amides, (2) Butoxylation of the amides with 1,2-epoxybutane to prepare the poly(oxyalkylene) amides, and (3) selective hydrolysis of in situ poly(oxyalkylene)-amine-ester-amides into poly(oxyalkylene)-amine-alcohol-amides and removal of acetic acid byproducts, via acid/base hydrolysis and water extraction procedures. The process step of selective hydrolysis is essential for removal the harmful composition of poly(oxyalkylene)-amine-ester-amides in resulting the better performance of the additive, particularly the positive engine's octane requirement or reducing the combustion chamber deposits. More specifically the butoxylation process generally produces poly(oxyalkylene)amides and poly(oxyalkylene)esters via an exchange reaction (trans-amidation/trans-esterification) and the poly(oxyalkylene)esters in the product mixtures is removed to obtain better performance products.
摘要:
The present invention is one kind of gasoline additives. The compounds consist of tertiary amine, amide and poly(oxybutylene) backbone in the same molecule. The process of making this type of products required an initiator containing primary amine and tertiary amine as the starting diamines. The primary amine will be converted into amide, while the tertiary amine remained intact. Then the amide is converted into butoxylates through butoxylation at CON—H position. The preparation therefore involved two steps: (1) amidation of diamines containing primary/tertiary amines with ethyl acetate to form amidoamines, and (2) butoxylation of this amidoamines to poly(oxybutylene)amidoamine. The product is gasoline soluble and can be used as additive having good performance of detergency and octane requirement reduction.