中间相沥青脱除灰分

De-ashing of naphthalene-based mesophase pitch synthesized by the AlCl_3-catalyzed method

以催化剂三氯化铝（AlCl3）和精萘在160~240℃下制备的萘沥青为研究对象,采用超声、搅拌、加热和酸碱洗涤的方法对萘沥青的脱灰进行研究。结果表明萘沥青在超声和搅拌的共同作用下,温度条件为80~90℃,先碱洗后酸洗时,脱灰效果最佳,可将萘沥青的灰分降低至500 ppm以下。用所得的萘沥青可以制备灰分低、性能优良的中间相沥青。关键词：中间相沥青;灰分;精萘;萘沥青;

Naphthalene asphalt was synthesized at 160-240 ℃ using naphthalene as a rawmaterial and AlCl_3 as a catalyst,and its de-ashing by ultrasonic treatment,stirring,heating,and acid and / or alkali washing was investigated. Results indicated that naphthalene-based mesophase asphalt with an ash content less than 500 ppm could be prepared by twice washing in an alkali followed by acid washing for 4 times and finally water washing for 10 times at 80-90 ℃ under ultrasonic or stirring conditions.