Method for preparing mesophase pitch by microwave heating

Abstract

The invention relates to a method for preparing mesophase pitch by microwave heating, which comprises the following steps: 1) using heavy oil as a raw material; 2) microwave heating; 3) preparing a mesophase pitch product. The present invention uses heavy oil as raw material, adopts microwave method to heat heavy oil, converts microwave electromagnetic energy into thermal energy, produces thermal effect, and makes heavy oil evenly heated to a certain temperature in a relatively short period of time to undergo cracking and decomposing. The condensation reaction can not only reduce the problems of uneven heating of materials, high wall temperature and long heating time in the traditional heating process, but also it is easier to control the reaction time, reaction temperature and heating power by using microwave heating; Substances have different effects, which is extremely beneficial for asphalt modification, automatically balances the absorption of microwaves, and avoids coking when the asphalt mixture is heated. The mesophase pitch prepared by the invention has high content of anisotropic structure, and the distribution of anisotropic structure is uniform.

Description

Technical field

[0001] The present invention relates to the preparation of carbon materials technical field, particularly relates to a method of preparing a microwave heating phase intermediate pitch. Background technique

[0002] Mesophase pitch is a new carbon material precursor, needle coke, pitch-based carbon fiber of high performance, high value-added carbon material are prepared by conversion of mesophase pitch. Determine the quality mesophase pitch carbon material properties late.

[0003] At home and abroad in the middle of preparing a mesophase pitch methods are: Hydrogen synthesis method, a modified alkylation, catalytic reforming method, a new method and a co-carbonized mesophase modification method, mesophase pitch is mainly Patent CN105238431 , CN107201248, CN107163970, CN107384462, CN104610994, CN102942945 and so on. These methods are to improve the properties of the raw material pretreatment and reactant viewpoint, the heating methods used for the thermal radiation...