1. Scientific Information of Lithium Adsorption Resin

A. Chemical Structure Resin and Specific Functional Groups (i.e: Sulphonates)

Molecular formula: Al(OH)3 nLiX­ mH2O

Aluminum hydroxide lithium absorbent

B. Selectivity respect to sodium, potassium, magnesium, calcium, boron

Lithium absorbent is selective and only absorbs lithium, which does not absorb other ions such as the potassium, sodium, magnesium, calcium, boron, etc.

C. Mechanism of Lithium Adsorption on Resin and Mechanism of Chloride Co - Adsorption

“It is likely that lithium ion enters the inside of octahedral cavity inside the aluminum hydroxide layer in the form of bare ion, and to achieve the charge balance, chloride ion enters the interlayer. The difference between the sieve effect and the hydration of lithium ion to other ions is the main reason that the absorbent has a relatively good selectivity to the lithium.”

Quoted from Journal of Salt Lake Research, Issue 3, 2018

2.Technical Information of Lithium Adsorption Resin:

A. Physics Characteristic of Resin

i. Particle size 0.3~1.5mm

ii. Porosity 45%

iii. Density 0.62g/cm3

B. Adsorption:

i. Specific lithium adsorption capacity [milligram Li /gr resin]: 3~6 mg/g

ii. Specific chloride adsorption capacity [milligram Li /gr resin]:15~30mg/g

iii. Specific sodium, potassium, magnesium, calcium, boron adsorption capacity [milligram Li /gr resin]: 0.1mg/g，no absorption of sodium, potassium, magnesium, calcium and boron is found

C. Desorption:

i. Specific lithium desorption capacity [milligram Li /gr resin]: 3~6 mg/g

ii. Specific chloride desorption capacity [milligram Li /gr resin]: 15~30mg/g

iii. Specific sodium, potassium, magnesium, calcium, boron desorption capacity [milligram Li /gr resin]: 0.1mg/g， no absorption of sodium, potassium, magnesium, calcium and boron is found

3. Overall Process Flowsheet Operational Bases

To produce Lithium Carbonate

Raw ore brine→absorption and extraction of lithium→analysis with fresh water→concentration and refining with membrane method→forced concentration or concentration in solar pond→secondary refining→addition of sodium carbonate to produce lithium carbonate→separation and washing→drying, grinding and packaging→lithium carbonate

4.Overall Process Design Criteria

A. Natural Salt Lake Brine Composition Range: Li [gpL]; Na [gpL]; K [gpL]; Mg [gpL]; B [gpL], etc.

: Li 0.1~5g/L; Na 5~80g/L; K5~20g/L; Mg 5~120g/L; B 0.1~10g/L,

Lithium Recovery [%]:≥80%（综合收率）(comprehensive recovery rate)

B. Specific Resin Consumption [kg Resin/Ton LCE]

10~20Kg Resin/Ton LCE

C. Specific Water [M3 /Ton LCE]:

60~200 M 3 /Ton LCE

D. Specific Energy Consumption [KWh/Ton LCE]:

2000~5500KWh/Ton LCE

E. Human Resources [HH/Ton LCE]

9~15HH/Ton LCE