Hydroquinone production process

The invention provides a hydroquinone production process. The hydroquinone production process comprises the steps of: 1) benzoquinone reduction reaction; 2) decolorization: adding activated carbon, conducting stirring decolorization, and extracting SO2 gas in a reaction kettle; taking the decolorized solution in the reaction kettle for centrifugation to obtain filtrate; 3) reduced pressure evaporation concentration and crystallization: conducting reduced pressure concentration on filtrate until a large amount of crystals appear in the concentrated solution, then performing heating until the crystals are dissolved, putting the product into a crystallization kettle while hot, adding seed crystals under stirring, and conducting standing for 4-6h; and 4) secondary crystallization: centrifugingthe crystallization liquid, conducting centrifuging and filtering to obtain a solid crude product, then transferring the solid crude product into the crystallization kettle again, performing heatingto dissolve the crystal su