System for producing 3, 3, 5-trimethylcyclohexanol through isophorone hydrogenation, and using method thereof

The invention discloses a method for producing 3, 3, 5-trimethylcyclohexanol by isophorone hydrogenation. The system comprises a hydrogenation reaction part and a separation circulation part, the hydrogenation reaction part comprises an isophorone circulation tank, a feeding pump, a raw material preheater, a hydrogenation reaction kettle and a hydrogen compressor, and the isophorone circulation tank, the feeding pump, the raw material preheater and the hydrogenation reaction kettle are sequentially communicated; the separation circulation part comprises a cooler, a gas-liquid separation buffertank, a rectifying tower I, a 3, 3, 5-trimethylcyclohexanol buffer tank, a rectifying tower II and a final cooler which are communicated in sequence; the raw material preheater is communicated with the cooler, the rectifying tower I is communicated with the isophorone circulating tank through a desalted water circulating pump, and the rectifying tower II is communicated with the isophorone circulating tank through an iso