Cov txheej txheem ntawm Phthalic Anhydride Los Ntawm Khoom Maleic Anhydride yog dab tsi?

Cov txheej txheem phthalic anhydride byproduct
Thaum tsim cov phthalic anhydride los ntawm o-xylene, maleic anhydride yog cov khoom lag luam (~ 5% ntawm phthalic anhydride tso zis). Thaum lub sijhawm tsim cov phthalic anhydride, cov pa roj reaction tail raug ntxuav kom tshem tawm cov organic; cov kua ntxuav (muaj maleic anhydride, me me ntawm benzoic acid, thiab phthalic acid) raug concentrated, purified, thiab ZOOua rau lub cev qhuav dej - ua rau cov khoom maleic anhydride.

Vim li cas ho xaiv Maleic Anhydride? Nws yog lub hauv paus ntawm cov polyester resins tsis muaj zog zoo tshaj plaws, ntxiv rau nws qhib ntau yam tshuaj lom neeg (BDO, THF, thiab lwm yam). Xa xov rau peb tam sim no kom tshawb nrhiav cov kev daws teeb meem MA uas haum rau koj txoj kev lag luam!