DQ Pure, operating under the legal entity Yunnan Tonghe Element New Materials Co., Ltd., is a speciality chemicals manufacturer headquartered in Kunming, Yunnan Province, China. The company focuses on the production, purification, and supply of high-purity rubidium and caesium compounds, positioning itself as a vertically integrated producer with in-house extraction, roasting, and refining capabilities.

The company’s manufacturing operations are anchored in Yunnan Province, a region that provides proximate access to lepidolite and other lithium-mica mineral sources from which rubidium and caesium are typically co-extracted as by-products of lithium processing. DQ Pure employs the t-BAMBP (4-tert-butyl-2-(α-methylbenzyl)phenol) solvent extraction process as its primary separation route, a method recognised in the industry for its high selectivity in isolating rubidium and caesium from complex alkali metal leachates containing potassium, sodium, and lithium.

The company operates an extraction workshop comprising over 2,000 multi-stage extraction units, enabling fine-tuned impurity control and customised product specifications for different downstream applications. Its production process integrates rotary kiln roasting technology for ore pre-treatment, followed by sequential solvent extraction stages yielding rubidium compounds, caesium compounds, lithium salts, and other high-value co-products. DQ Pure operates a zero liquid discharge wastewater system with 100% recycling of production wastewater, and holds ISO 9001, ISO 14000, and OHSAS certification. Its quality control laboratory is equipped with analytical instruments including carbon-sulphur analysers, FT-IR, GC, GC-MS, and SEM.

DQ Pure supplies customers globally, with a registered address also listed in Jakarta, Indonesia, reflecting an international commercial presence. The company is contactable via a Chinese (+86) telephone number with a primary contact listed as Chris Lu.

Key Products and Services

Rubidium Compounds

• Rubidium Carbonate (Rb₂CO₃) — used in specialty glass, optoelectronics, and as a precursor in rubidium compound synthesis
• Rubidium Chloride (RbCl) — used as a biomarker in medical research, in electrophysiology assays, and as an intermediate in compound manufacturing
• Rubidium Sulphate (Rb₂SO₄) — used in catalysis and speciality chemical applications
• Rubidium Iodide (RbI) — used in scintillator and optical applications
• Rubidium Hydroxide (RbOH) — used as a reagent in chemical synthesis and electrochemical applications
• Rubidium Metal (99.9% purity) — supplied in explosion-proof vacuum packaging; used in atomic clocks, quantum computing research, laser cooling, Bose-Einstein condensation experiments, and rubidium-82 PET cardiac imaging

Caesium Compounds

• Caesium salts produced via the same t-BAMBP solvent extraction process, available to customised purity and specification for downstream industrial and research applications

t-BAMBP Extractant

• DQ Pure is listed as a manufacturer of t-BAMBP, the solvent extraction reagent used for rubidium and caesium separation; supplied to third parties engaged in alkali metal processing

Custom Manufacturing and Supply

• Custom product specifications available via the 2,000+ stage extraction infrastructure, enabling adjustment of impurity profiles and specific gravity parameters to meet client requirements
• Full-element utilisation model producing sequential co-product outputs including lithium salts alongside rubidium and caesium compounds

DQ Pure operates in a highly specialised segment of the global speciality chemicals market, producing rare alkali metal compounds for which demand is driven by a narrow but growing set of high-value end applications. Rubidium and caesium compounds serve as essential inputs in atomic clock manufacturing (including rubidium frequency standards used in GPS, telecommunications, and defence systems), quantum computing and sensing research, advanced medical imaging (rubidium-82 PET), speciality glass, optoelectronics, and solar photovoltaic components. China’s dominance in lepidolite mining and processing gives producers in Yunnan Province a structural supply-chain advantage, and DQ Pure’s vertically integrated model — from ore roasting through to refined product — positions it as a cost-competitive, full-process supplier relative to distributors and toll processors. The company’s t-BAMBP manufacturing capability is an additional differentiator, enabling supply of both the extraction reagent and the purified end-products to the market. Given the critical-materials status of both rubidium and caesium in Western industrial policy contexts, DQ Pure’s international commercial reach will be subject to continued scrutiny around supply-chain provenance and export compliance.