▎ 摘　　要

NOVELTY - Utilization of salt lake brine involves dissolving (i) solid or liquid salt lake brine with deionized water, removing solid insoluble components, and configure the filtrate into 1-30% solution, assembling (ii) graphite as anode and other graphite as cathode, a diaphragm is placed between the anode and cathode electrode plates, installing (iii) diaphragm device in the cathode chamber, and diaphragm divides the cathode into a portion facing the anode and a portion facing away from the anode, adding (iv) brine solution to the electrolytic cell, and adding organic solution to the cathode chamber undergoes constant voltage electrolysis, the anode gets chlorine gas, and the cathode gets hydrogen gas, ultrasonically dispersing (v) the products obtained from the anode and cathode, leaving still (vi) anode product (A) after ultrasonic dispersion, and vacuum filtering to obtain precipitate (A1), precipitate (B) and precipitation (C), drying (vii) precipitates. USE - Utilization of salt lake brine. ADVANTAGE - The method solves the utilization problem of salt lake brine. It can directly use salt lake brine as raw material, in the same device can produce the magnesium hydroxide/graphene composite, graphene absorbing cation, graphene absorbing anion, hydrogen and chlorine; the valuable element in the brine can be comprehensively used, the product with multiple high additional value can be obtained, and the technique is simple. The device is easy to process, and it is suitable for industrial large-scale production. DETAILED DESCRIPTION - Utilization of salt lake brine involves dissolving (i) solid or liquid salt lake brine with deionized water, removing solid insoluble components, and configure the filtrate into a 1-30% solution, assembling (ii) graphite as anode and other graphite as cathode, the two electrode plates are connected electrodes of the DC power supply through wires, a diaphragm is placed between the anode and cathode electrode plates, which separates the electrolytic cell into anode chamber and cathode chamber, installing (iii) diaphragm device in the cathode chamber, and diaphragm divides the cathode into a portion facing the anode and a portion facing away from the anode, adding (iv) brine solution to the electrolytic cell, and adding organic solution to the cathode chamber, turn on the DC power supply, and control the current density between the two plates to be 0.1-4 A/cm2 undergoes constant voltage electrolysis, the anode gets chlorine gas, and the cathode gets hydrogen gas, ultrasonically dispersing (v) the products obtained from the anode and cathode at ultrasonic power of 10-100 kHz, and the dispersion time is 5-60 minutes, leaving still (vi) anode product (A) after ultrasonic dispersion, the cathode product (B) facing the anode portion, and the product (C) facing the cathode portion are separately allowed to stand for 1-120 minutes, and vacuum filtering to obtain precipitate (A1), precipitate (B) and precipitation (C), drying (vii) precipitates (A) and (C) by a freeze dryer from -40-120 degrees C for 60-360 minutes through a temperature program at a rate of 1-10 degrees C/minute to obtain graphene products (P1) which absorbs different ions, and drying precipitate (B) in an oven at a constant temperature of 80-120 degrees C for 60-360 minutes to obtain the product magnesium hydroxide/graphene composite product (P2).