# Laguna Verde PFS Process Validated

Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/laguna-verde-pfs-process-validated--bbbf2295-86fe-4e5a-b23f-563a962f254d

Original source: https://www.londonstockexchange.com/news-article/CTL/laguna-verde-pfs-process-validated/17821085

Publisher: lse

Original announcement: 2026-10-06T05:00:03.000Z

Analysis by Minestarters Atlas

Atlas analysis published: 2026-10-06T07:48:25.235Z

Atlas analysis updated: 2026-10-06T07:48:25.235Z

- Company: CleanTech Lithium PLC

- Ticker: CTL

- Exchange: LSE

- Region: Chile

- Primary commodity: Lithium

- Secondary commodities: Magnesium, Calcium, Sodium, Potassium, Iron ore, Boron, Sulfate, Chlorine

- Document categories: Metallurgy

- Extracted: 2026-10-06 07:48:25 UTC

Narrative sentiment: 0.80 · Bullish

## Minestarters Atlas summary

CleanTech Lithium has successfully validated its Laguna Verde Pre-Feasibility Study \(PFS\) process through a pilot-scale program in Chile. The trial produced high-purity lithium carbonate \(up to 99.75% Li2CO3\) and demonstrated lithium recovery and impurity rejection rates that exceeded previous design benchmarks.

Reasoning: Successful pilot-scale validation of the DLE process flowsheet with high-purity product and superior recovery/rejection metrics compared to PFS benchmarks.

- Positive factor: High purity lithium carbonate produced \(up to 99.75%\)

- Positive factor: Lithium recovery of 98.3% in nanofiltration stage

- Positive factor: Magnesium and calcium rejection exceeded PFS benchmarks

- Positive factor: Pilot scale trial validated PFS process design

- Positive factor: Successful water recycling \(>90%\)

Facts used in scoring: 4

## Classification and evidence

**High Recovery**

Polarity: positive

Definition: Recovery at or above the exceptional band for the commodity and processing route.

Why it applies: Lithium recovery of 98.3% in the nanofiltration stage is exceptional.

Evidence · text

> lithium recovery of 98.3%

**Mill Route**

Polarity: neutral

Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\).

Why it applies: The process involves a pilot plant with DLE, nanofiltration, and carbonation stages.

Evidence · text

> processed at Lanshen´s pilot plant facility

**Multi-Domain Tested**

Polarity: positive

Definition: Variability across ore domains \(oxide, transition, fresh\) has been addressed.

Why it applies: 2 distinct composites were tested

## Extracted facts

Stored fact records: 4. Some facts used in scoring do not have a stored record.

## Metallurgical Results (4)

### carbonation

[Link to this fact](https://atlas-staging.minestarters.com/news/laguna-verde-pfs-process-validated--bbbf2295-86fe-4e5a-b23f-563a962f254d#fact-metallurgical-facts-0)

Laguna Verde · lithium

#### Identity

- Project: Laguna Verde
- Commodity: lithium
- Region: chile
- Reported Region: Chile
- Ticker: CTL

#### Test Work

- Program Status: detailed
- Test Type: carbonation
- Processing Route: Direct Lithium Extraction \(DLE\), purification, concentration, and carbonation
- Sample: CTL 100 lithium carbonate sample

#### Recovery

- Conc. Grade: 99.69
- Conc. Grade Unit: %

#### Lab

- Laboratory: Alex Stewart Laboratory

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-10-06T00:00:00.000Z

Reasoning: High purity lithium carbonate sample produced during pilot stage.

- Positive factor: High purity achieved \(99.69%\)

Evidence · table

> 99.69

Context: CTL 100

### carbonation

[Link to this fact](https://atlas-staging.minestarters.com/news/laguna-verde-pfs-process-validated--bbbf2295-86fe-4e5a-b23f-563a962f254d#fact-metallurgical-facts-1)

Laguna Verde · lithium

#### Identity

- Project: Laguna Verde
- Commodity: lithium
- Region: chile
- Reported Region: Chile
- Ticker: CTL

#### Test Work

- Program Status: detailed
- Test Type: carbonation
- Processing Route: Direct Lithium Extraction \(DLE\), purification, concentration, and carbonation
- Sample: CTL 200 lithium carbonate sample

#### Recovery

- Conc. Grade: 99.73
- Conc. Grade Unit: %

#### Lab

- Laboratory: Alex Stewart Laboratory

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-10-06T00:00:00.000Z

Reasoning: High purity lithium carbonate sample produced during pilot stage.

- Positive factor: High purity achieved \(99.73%\)

Evidence · table

> 99.73

Context: CTL 200

### carbonation

[Link to this fact](https://atlas-staging.minestarters.com/news/laguna-verde-pfs-process-validated--bbbf2295-86fe-4e5a-b23f-563a962f254d#fact-metallurgical-facts-2)

Laguna Verde · lithium

#### Identity

- Project: Laguna Verde
- Commodity: lithium
- Region: chile
- Reported Region: Chile
- Ticker: CTL

#### Test Work

- Program Status: detailed
- Test Type: carbonation
- Processing Route: Direct Lithium Extraction \(DLE\), purification, concentration, and carbonation
- Sample: CTL 300 lithium carbonate sample

#### Recovery

- Conc. Grade: 99.75
- Conc. Grade Unit: %

#### Lab

- Laboratory: Alex Stewart Laboratory

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-10-06T00:00:00.000Z

Reasoning: High purity lithium carbonate sample produced during pilot stage.

- Positive factor: High purity achieved \(99.75%\)

Evidence · table

> 99.75

Context: CTL 300

### nanofiltration

[Link to this fact](https://atlas-staging.minestarters.com/news/laguna-verde-pfs-process-validated--bbbf2295-86fe-4e5a-b23f-563a962f254d#fact-metallurgical-facts-3)

Laguna Verde · lithium

#### Identity

- Project: Laguna Verde
- Commodity: lithium
- Region: chile
- Reported Region: Chile
- Ticker: CTL

#### Test Work

- Program Status: detailed
- Test Type: nanofiltration
- Processing Route: Direct Lithium Extraction \(DLE\), purification, concentration, and carbonation
- Sample: nanofiltration stage using DuPont FilmTec LiNE-XD

#### Recovery

- Recovery: 98.3 %

#### Review

- Needs Review: No
- Historical: No

#### Dates

- Event date: 2026-10-06T00:00:00.000Z

Reasoning: High lithium recovery achieved during the nanofiltration stage of the pilot trial.

- Positive factor: Lithium recovery of 98.3% exceeds PFS benchmark

Evidence · text

> lithium recovery of 98.3%

#### Tags used in scoring

**High Recovery**

Polarity: positive

Definition: Recovery at or above the exceptional band for the commodity and processing route.

Why it applies: 98.3% is at or above the exceptional band \(80%\)

## How Atlas produces this analysis

Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.