Abstract

Disclosed are a gasoline composition and its preparation method. Said gasoline composition comprises raw gasoline and acetic acid secbutyl ester, in terms of the total weight of the gasoline composition, with the contents of acetic acid secbutyl ester being 1-30 weight%, contents of the raw gasoline being 70-99 weight%. The preparation method of the gasoline composition comprises the step of adding acetic acid secbutyl ester into raw gasoline.

IPC Classes  ?

• C10L 1/19 - Esters
• C10L 10/10 - Use of additives to fuels or fires for particular purposes for improving the octane number
• C10L 10/18 - Use of additives to fuels or fires for particular purposes use of detergents or dispersants for purposes not provided for in groups

Abstract

Disclosed is a process of removing heavier hydrocarbons from the reaction products of producing sec-butyl acetate, which is characterized in: drawing out the materials from heavier hydrocarbon-rich zone and contacting the materials with water sufficiently, thereby the heavier hydrocarbons and water coming into layers naturally. The upper layer of heavier hydrocarbons is discharged and the lower layer of water is recharged into the system. The heavier hydrocarbon-rich zone refers to a zone enriched with heavier hydrocarbons and formed at the lower part of the azeotropic rectification column during the course of azeotropic separation, and the azeotropic separation refers to the process of feeding the mixture containing sec-butyl acetate, acetic acid and heavier hydrocarbons into the azeotropic rectification column, adding azeotropic agent for azeotropic rectification, and evaporating the azeotrope formed by sec-butyl acetate and azeotropic agent from the top of the column, and acetic acid and the heavier hydrocarbons falling into the bottom.

IPC Classes  ?

• C07C 67/48 - SeparationPurificationStabilisationUse of additives
• C07C 67/04 - Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides onto unsaturated carbon-to-carbon bonds
• C07C 69/14 - Acetic acid esters of monohydroxylic compounds
• C07C 53/08 - Acetic acid
• B01D 11/04 - Solvent extraction of solutions which are liquid

Abstract

A method of protecting catalyst used for preparing low fatty ester is provided. An acid ion exchanging resin catalyst is protected by washing 2-5C olefin to eliminate part of catalyst toxin in olefin before they enter the reactor; and eliminating harmful substances of 1-4C fatty acid and/or 2-5C olefin using reaction assistant agent in a pre-reactor. The advantage of the invention is that the method prevents catalyst poisoning since the harmful impurities have been eliminated, so that catalyst will not lose reactive ability when it is used more than 6 months, at the same time the reaction assistant agent for protecting the catalyst has no metal ion crossing filter phenomenon, and there is small pressure difference between the bed layers of the reaction agent.

IPC Classes  ?

• C07C 67/04 - Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides onto unsaturated carbon-to-carbon bonds
• C07C 69/12 - Acetic acid esters
• B01J 33/00 - Protection of catalysts, e.g. by coating
• B01D 15/04 - Separating processes involving the treatment of liquids with solid sorbentsApparatus therefor with ion-exchange materials as adsorbents
• B01J 31/08 - Ion-exchange resins