Use KOH as the base, usual much better yeald. DMF and potasiumcarbonat is also a good system, usual it runs at 25°C for 12 houers. Last time I methylated methylhydroquinon i used water as the solvent works greath (yeald in the 80's))) can't remember iff I posted a synth at the hive, but it's straight ahead, disolve 1,1 mole KOH in wather, add ½ mole methylhydroquinon. Cool with external ice, add 1,1 mole DMS, then boil some houers (1-5) pour out on ice and seperate the TM from the wather xtract the wather with ether, dry, evaporate and distilate. I always get's a red oil afther the destilation but asume it's posible to get a white one.