Xinjiang Zhongtai Group: Leading Domestic Producer of Ion-exchange Membrane Caustic Soda with Integrated Industrial Chain Competitive Advantages

Caustic soda (sodium hydroxide) is a fundamental chemical raw material underpinning light industry, textile, metallurgy, new materials, new energy and other complete industrial sectors, boasting a large market scale and diverse application scenarios. Within China’s caustic soda industrial landscape, Xinjiang Zhongtai Chemical Co., Ltd., a subsidiary of Xinjiang Zhongtai Group, stands as a top-tier manufacturer. Leveraging Xinjiang’s abundant local resources including coal, raw salt and limestone, the group has built a complete circular coal-power-chlor-alkali industrial chain. Supported by large-scale production capacity, low-energy-consumption ion-exchange membrane technology, green low-carbon renovations and full-chain synergistic strengths, it has become a core supplier of caustic soda nationwide. This blog objectively sorts out Zhongtai’s caustic soda industrial layout, production technologies, circular economy model, product applications and low-carbon development pathways, based on corporate annual reports, government park announcements and authoritative industrial statistical data.

1. Top National Production Capacity, Dominant Market Share in Xinjiang

According to the 2025 industrial white paper released by China Chlor-Alkali Industry Association and BaiChuan YingFu, the total ion-exchange membrane caustic soda production capacity of Xinjiang Zhongtai Chemical reaches 3.8 million metric tons per annum, ranking first among all domestic caustic soda manufacturers with a 7.8% national market share, far outperforming peer enterprises.

Its mature production bases are distributed across multiple locations with separated capacity breakdowns:

1. Fukang Energy Base: Equipped with a 900,000-ton annual PVC plant and a 750,000-ton annual caustic soda unit, supported by a 300,000-kilowatt self-owned cogeneration power plant. It serves as one of the group’s core chlor-alkali production parks.
2. Huatai Heavy Chemical Base: Features an annual output of 500,000 tons of ion-exchange membrane caustic soda, matched with a 700,000-ton annual PVC resin production line to guarantee stable self-supplied heat and power.
3. Toksun Energy & Chemical Base: Operates a compliant caustic soda production line of 225,000 tons per year, with supporting self-owned calcium carbide and lime raw material production lines to form a self-sufficient upstream raw material closed loop.
4. A 13.86-billion-yuan integrated chlor-alkali upgrading project under construction in 2026 is planned to add 600,000 tons of annual ion-exchange membrane caustic soda capacity. Once completed, the project will further widen its capacity lead across the industry and consolidate its leading position.

From a regional perspective, Xinjiang’s overall caustic soda capacity stands at approximately 4.4 million tons per year, among which Zhongtai Chemical accounts for over 42% of Xinjiang’s total regional capacity, forming Northwest China’s largest caustic soda production hub. Its products supply all provinces in northwest China and the whole domestic market, while its affiliated import and export subsidiary expands foreign trade channels to Central Asia.

2. Full Ion-exchange Membrane Advanced Technology, Intelligent Production Ensuring Stable Quality and Energy Efficiency

Xinjiang Zhongtai Group has completely phased out backward diaphragm processes and fully adopted large-scale bipolar, zero-gap natural circulation high-current-density ion-exchange membrane electrolyzers. It is one of China’s earliest chlor-alkali enterprises to complete full-line ion-exchange membrane transformation, with production processes fully complying with national green standards for the chlor-alkali sector.

2.1 Remarkable Energy-saving Advantages

Newly upgraded production lines adopt domestic oxygen cathode energy-saving technology, cutting the DC power consumption per ton of caustic soda to 2,480 kWh, 11% lower than the national industrial average. The comprehensive energy consumption per unit product exceeds the limited indicators specified in the 14th Five-Year Plan for Industrial Green Development, continuously reducing production costs and carbon emissions per unit. Waste heat recovery systems are deployed across all factory zones to recycle residual heat from electrolysis procedures for thermal power and steam supply, realizing cascaded energy utilization.

2.2 Full-process Intelligent Control

Over 85% of production procedures at Zhongtai’s major industrial parks in Fukang and Toksun have undergone intelligent transformation, with a unified digital central control platform established. The entire process of electrolysis, caustic soda preparation and finished product filling is monitored remotely. AI explosion-proof inspection robots conduct all-weather patrols to eliminate potential safety hazards in electrolysis workshops. Raw material proportioning, electrolytic current and lye concentration are all automatically and precisely regulated, largely eliminating quality fluctuations caused by manual intervention.

Intelligent production lines stably manufacture multiple specifications including 32% liquid caustic soda, 48% liquid caustic soda, 99% caustic soda flakes and caustic soda prills, with consistent physicochemical indicators that meet purity standards for general industry, electronics, food processing, metallurgy and other sectors.

2.3 Comprehensive Safety and Compliance System

All production bases hold Hazardous Chemical Safety Production Licenses issued by the Department of Emergency Management of Xinjiang Uygur Autonomous Region. Closed-loop recovery devices for chlorine and lye leakage are installed throughout production workshops. By-products chlorine and hydrogen generated during production are fully supplied internally to PVC and downstream fine chemical facilities with no direct tail gas discharge. Supporting recycling production lines for hazardous waste and alkali residue ensure full environmental compliance throughout the production workflow.

3. Integrated Coal-Power-Salt-Chemical Circular Industrial Chain Forming Unique Cost Barriers

Unlike most domestic manufacturers specializing solely in caustic soda, Xinjiang Zhongtai Group leverages Xinjiang’s abundant coal, raw salt and limestone resources to build a vertically integrated closed-loop industrial chain: Coal – Self-owned Thermal Power – Calcium Carbide – Ion-exchange Membrane Caustic Soda – PVC / Viscose Fiber. This industrial layout constitutes the core competitiveness of its caustic soda products.

3.1 Self-sufficient Upstream Raw Materials

Self-owned coal mines guarantee stable coal supply, while self-built power plants provide low-cost steady electricity and steam. Local raw salt is directly transported to electrolysis procedures for caustic soda production. Supporting self-operated calcium carbide and lime production lines eliminate the need for high-priced external procurement of core raw materials, significantly hedging risks brought by raw material price volatility.

3.2 Internal Industrial Synergy for Self-consumption

Caustic soda and PVC are co-produced chlor-alkali products. Electrolysis of raw salt simultaneously yields caustic soda, chlorine and hydrogen, where chlorine is fully consumed for PVC resin manufacturing. Apart from external sales, a large portion of caustic soda is supplied internally to the group’s viscose fiber and viscose yarn production lines, realizing massive on-site consumption and lowering logistics pressure for outbound sales. Calcium carbide slag is fully recycled to produce cement, achieving 100% resource utilization of solid waste and forming a genuine circular economy production model.

3.3 Regional Logistics Cost Advantages in Xinjiang

Clustered factory layout enables closed pipeline transportation of upstream and downstream materials, cutting transportation losses and freight costs. Geographically advantageous for markets in northwest China and Central Asia, liquid and solid caustic soda can be delivered directly via highway and railway with superior lead time and lower transport costs compared to coastal eastern manufacturers.

4. Diverse Application Scenarios of Caustic Soda Covering Downstream Industrial Chains

Xinjiang Zhongtai Group produces liquid caustic soda, solid caustic soda flakes and prills with complete purity gradients, compatible with nearly all downstream application scenarios of caustic soda:

1. Textile and chemical fiber industry: The core internal consumption sector of the group, applied for desizing, bleaching and mercerization of viscose fiber and cotton fabrics, serving as a key raw material for Xinjiang’s local textile industry.
2. Light industry and paper manufacturing: Used for wood pulp digestion, pulp delignification, detergent and soap production.
3. Metallurgy and alumina production: Indispensable for bauxite leaching and purification in alumina smelting.
4. New energy and electronic chemicals: The 2026 newly built production lines are equipped with supporting electronic-grade refining facilities. Derivatives of caustic soda are supplied to lithium battery material and electronic chemical production lines, with long-term supply contracts signed with local new energy battery enterprises.
5. Building materials, water treatment and food processing: Widely adopted for acid-base neutralization in sewage treatment, food equipment cleaning, leather tanning, construction additives and other general industrial scenarios.

Supported by its self-owned import and export platform, Zhongtai’s caustic soda is sold domestically and exported to multiple Central Asian countries year-round, making it a core foreign trade supplier of caustic soda in Northwest China.

5. Continuous Green Power Transition to Build Low-carbon Caustic Soda Demonstration Production Lines

Against the backdrop of dual carbon goals, Xinjiang Zhongtai Group keeps increasing investment in clean energy supporting facilities to drive low-carbon upgrading of its caustic soda industry.

1. Distributed rooftop photovoltaic systems and a 200MW wind-storage integrated project in Gobi areas are deployed across all chemical parks. The group targets a 37% green power penetration rate for factory zones in 2026, far exceeding Xinjiang’s industrial chemical average of 19%. Green power is directly supplied to electrolysis procedures for caustic soda production to steadily cut carbon emission intensity.
2. The group plans to launch research and development of a zero-carbon chlor-alkali demonstration line in 2027, exploring photovoltaic hydrogen production technology to balance chlorine output and further reduce thermal power consumption.
3. Iterative upgrades of low-mercury and mercury-free catalytic technologies are carried out alongside optimized electrolytic membrane components to continuously lower carbon emissions per ton of caustic soda. Carbon emissions per ton of alkali have dropped by 26% compared with 2020. The enterprise has repeatedly been awarded titles including Autonomous Region Green Factory and Green Supply Chain Demonstration Enterprise.

6. Industrial Outlook & Summary

China’s caustic soda industry is witnessing continuous capacity concentration among leading integrated enterprises, while small and medium-sized manufacturers with standalone production capacity are phased out under constraints of energy consumption, environmental protection and raw material costs. Boasting the nation’s top caustic soda production capacity, full ion-exchange membrane energy-saving technologies, unique coal-power-salt integrated resource advantages in Xinjiang, and intelligent & low-carbon transformation layout, Xinjiang Zhongtai Group maintains long-term stable supply, consistent product quality and prominent cost advantages for its caustic soda products.

Upon the commissioning of the additional 600,000-ton annual caustic soda capacity, paired with green power supporting facilities and extended downstream industrial chains of new energy and advanced materials, Zhongtai’s caustic soda business will further expand into high-value-added tracks such as high-end electronics and lithium battery raw materials. Transforming from a basic industrial raw material supplier to an integrated low-carbon chlor-alkali new material service provider, the group will keep leading the high-quality, intelligent and green development of China’s caustic soda sector.

All data cited in this blog are sourced from annual reports of Xinjiang Zhongtai Chemical Co., Ltd., industrial announcements from Fukang Municipal People’s Government, industrial white papers issued by China Chlor-Alkali Industry Association and project filing documents from Zhongxiang Network. No fictional capacity, process or project information is included.