{"id":31383,"date":"2026-08-13T22:38:55","date_gmt":"2026-08-13T14:38:55","guid":{"rendered":"https:\/\/www.chimaytech.net\/ph-and-orp-windows-for-lithium-and-magnesium-recovery-shanghai-chimay-sensor-solutions\/"},"modified":"2026-08-13T22:38:55","modified_gmt":"2026-08-13T14:38:55","slug":"ph-and-orp-windows-for-lithium-and-magnesium-recovery-shanghai-chimay-sensor-solutions","status":"publish","type":"post","link":"https:\/\/www.chimaytech.net\/ar\/ph-and-orp-windows-for-lithium-and-magnesium-recovery-shanghai-chimay-sensor-solutions\/","title":{"rendered":"pH and ORP Windows for Lithium and Magnesium Recovery: Shanghai ChiMay Sensor Solutions"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.chimaytech.net\/ar\/ph-and-orp-windows-for-lithium-and-magnesium-recovery-shanghai-chimay-sensor-solutions\/#pH_and_ORP_Windows_for_Lithium_and_Magnesium_Recovery_Shanghai_ChiMay_Sensor_Solutions\" >pH and ORP Windows for Lithium and Magnesium Recovery: Shanghai ChiMay Sensor Solutions<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.chimaytech.net\/ar\/ph-and-orp-windows-for-lithium-and-magnesium-recovery-shanghai-chimay-sensor-solutions\/#The_Chemistry_of_Selective_Mineral_Recovery\" >The Chemistry of Selective Mineral Recovery<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.chimaytech.net\/ar\/ph-and-orp-windows-for-lithium-and-magnesium-recovery-shanghai-chimay-sensor-solutions\/#Magnesium_Recovery_The_pH_Window\" >Magnesium Recovery: The pH Window<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.chimaytech.net\/ar\/ph-and-orp-windows-for-lithium-and-magnesium-recovery-shanghai-chimay-sensor-solutions\/#Lithium_Recovery_ORP-Driven_Carbonate_Precipitation\" >Lithium Recovery: ORP-Driven Carbonate Precipitation<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.chimaytech.net\/ar\/ph-and-orp-windows-for-lithium-and-magnesium-recovery-shanghai-chimay-sensor-solutions\/#Sensor_Requirements_for_Brine_pH_and_ORP_Monitoring\" >Sensor Requirements for Brine pH and ORP Monitoring<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.chimaytech.net\/ar\/ph-and-orp-windows-for-lithium-and-magnesium-recovery-shanghai-chimay-sensor-solutions\/#pH_Measurement_in_Concentrated_Brine\" >pH Measurement in Concentrated Brine<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.chimaytech.net\/ar\/ph-and-orp-windows-for-lithium-and-magnesium-recovery-shanghai-chimay-sensor-solutions\/#ORP_Measurement_for_Redox_Control\" >ORP Measurement for Redox Control<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.chimaytech.net\/ar\/ph-and-orp-windows-for-lithium-and-magnesium-recovery-shanghai-chimay-sensor-solutions\/#Process_Control_Strategy_Integrating_pH_and_ORP_Data\" >Process Control Strategy: Integrating pH and ORP Data<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.chimaytech.net\/ar\/ph-and-orp-windows-for-lithium-and-magnesium-recovery-shanghai-chimay-sensor-solutions\/#Economic_Impact_of_Precise_pHORP_Control\" >Economic Impact of Precise pH\/ORP Control<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.chimaytech.net\/ar\/ph-and-orp-windows-for-lithium-and-magnesium-recovery-shanghai-chimay-sensor-solutions\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1 id=\"ph-and-orp-windows-for-lithium-and-magnesium-recovery-shanghai-chimay-sensor-solutions\"><span class=\"ez-toc-section\" id=\"pH_and_ORP_Windows_for_Lithium_and_Magnesium_Recovery_Shanghai_ChiMay_Sensor_Solutions\"><\/span>pH and ORP Windows for Lithium and Magnesium Recovery: Shanghai ChiMay Sensor Solutions<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Selective precipitation of lithium and magnesium from desalination brine is governed by pH windows as narrow as <strong>\u00b10.2 pH units<\/strong>\u2014a deviation there can shift recovery selectivity by <strong>10\u201315%<\/strong>, per <strong>ChiMay Corp research (2026)<\/strong>. ORP monitoring during magnesium recovery ensures optimal reagent dosing, cutting chemical consumption by <strong>25\u201335%<\/strong> while maintaining <strong>&gt;95% precipitation efficiency<\/strong>. On the hardware side, Shanghai ChiMay&rsquo;s industrial pH Electrode delivers <strong>\u00b10.01 pH resolution<\/strong> with a <strong>gel-filled double-reference junction<\/strong> resistant to concentrated brine fouling, and the ORP sensor provides <strong>\u00b11 mV resolution<\/strong> for real-time redox control. The economics line up too: the lithium market is projected to grow from <strong>USD 12.5 billion in 2026<\/strong> to <strong>USD 34.8 billion by 2031<\/strong> at a <strong>CAGR of 22.7%<\/strong> (per <strong>Mordor Intelligence, 2026<\/strong>), and real-time pH\/ORP monitoring can lift overall recovery yields by <strong>12\u201318%<\/strong> while cutting reagent costs by <strong>USD 40,000\u201380,000 annually<\/strong> for a mid-sized brine valorization facility.<\/p>\n<hr \/>\n<p>Selective lithium and magnesium recovery from desalination brine is one of the most promising value-creation pathways in modern water treatment. But hitting the purity levels battery manufacturers and pharmaceutical companies demand requires extraordinarily precise chemical control\u2014control that starts and ends with accurate pH and ORP measurement.<\/p>\n<h2 id=\"the-chemistry-of-selective-mineral-recovery\"><span class=\"ez-toc-section\" id=\"The_Chemistry_of_Selective_Mineral_Recovery\"><\/span>The Chemistry of Selective Mineral Recovery<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Desalination brine is a complex solution containing sodium, potassium, calcium, magnesium, lithium, boron, sulfate, chloride and trace elements. Recovering specific minerals from that mixture requires sequential precipitation steps, each targeting a different compound under specific chemical conditions.<\/p>\n<h3 id=\"magnesium-recovery-the-ph-window\"><span class=\"ez-toc-section\" id=\"Magnesium_Recovery_The_pH_Window\"><\/span>Magnesium Recovery: The pH Window<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Magnesium hydroxide (Mg(OH)\u2082) precipitation begins at approximately <strong>pH 10.0<\/strong> and is essentially complete by <strong>pH 10.8<\/strong>. Calcium hydroxide (Ca(OH)\u2082) starts precipitating at <strong>pH 12.4<\/strong>, leaving a usable window of roughly <strong>1.4 pH units<\/strong> for selective magnesium recovery. In practice the optimal window is even narrower\u2014<strong>pH 10.2 to 10.6<\/strong>\u2014because co-precipitation of calcium and other impurities becomes significant above <strong>pH 10.6<\/strong>, contaminating the magnesium product.<\/p>\n<p>According to <strong>ChiMay Corp application studies (2026)<\/strong>, holding pH within that <strong>\u00b10.2 unit<\/strong> window achieves <strong>&gt;95% magnesium precipitation<\/strong> with <strong>&lt;2% calcium contamination<\/strong>. Drift above pH 10.8 raises calcium contamination to <strong>8\u201312%<\/strong>, forcing expensive reprocessing to meet battery-grade purity specifications.<\/p>\n<h3 id=\"lithium-recovery-orp-driven-carbonate-precipitation\"><span class=\"ez-toc-section\" id=\"Lithium_Recovery_ORP-Driven_Carbonate_Precipitation\"><\/span>Lithium Recovery: ORP-Driven Carbonate Precipitation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Lithium carbonate (Li\u2082CO\u2083) precipitation from brine is typically done by adding sodium carbonate (Na\u2082CO\u2083) after magnesium removal. The efficiency of this step depends on:<\/p>\n<ul>\n<li><strong>pH control<\/strong>: Lithium carbonate precipitation is optimal at <strong>pH 10.5\u201311.5<\/strong>, with the solubility minimum at <strong>pH 11.0<\/strong><\/li>\n<li><strong>ORP management<\/strong>: The oxidation state of the solution affects iron, manganese and other redox-active impurities that can co-precipitate with lithium carbonate. Maintaining <strong>ORP between +150 and +250 mV<\/strong> minimizes these impurities<\/li>\n<\/ul>\n<p>ORP monitoring during lithium carbonate precipitation acts as an early warning system for reagent contamination, oxygen ingress and incomplete magnesium removal\u2014all of which shift the redox balance and compromise product purity.<\/p>\n<h2 id=\"sensor-requirements-for-brine-ph-and-orp-monitoring\"><span class=\"ez-toc-section\" id=\"Sensor_Requirements_for_Brine_pH_and_ORP_Monitoring\"><\/span>Sensor Requirements for Brine pH and ORP Monitoring<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 id=\"ph-measurement-in-concentrated-brine\"><span class=\"ez-toc-section\" id=\"pH_Measurement_in_Concentrated_Brine\"><\/span>pH Measurement in Concentrated Brine<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Standard pH electrodes face three challenges in brine concentrate environments:<\/p>\n<ol>\n<li>\n<p><strong>Reference junction fouling<\/strong>: High salt concentrations accelerate KCl crystal precipitation at the reference junction, causing slow response and measurement drift. Shanghai ChiMay&rsquo;s <strong>pH Electrode<\/strong> addresses this with a <strong>gel-filled double-reference junction<\/strong> that holds a stable reference potential for <strong>6\u201312 months<\/strong> in brine service, versus <strong>2\u20134 weeks<\/strong> for conventional liquid-filled junctions.<\/p>\n<\/li>\n<li>\n<p><strong>Glass membrane degradation<\/strong>: High pH and high temperature accelerate dissolution of the pH-sensitive glass membrane. Shanghai ChiMay uses a <strong>low-resistance lithium-doped glass membrane<\/strong> optimized for high-pH, high-temperature service, achieving <strong>12\u201318 months<\/strong> lifespan in brine applications where standard glass membranes degrade within <strong>3\u20136 months<\/strong>.<\/p>\n<\/li>\n<li>\n<p><strong>Sodium ion interference<\/strong>: At very high pH (&gt;12), sodium ions interfere with the glass membrane reading (&ldquo;sodium error&rdquo;). Brine valorization pH measurements typically stay below pH 11, but the Shanghai ChiMay electrode uses <strong>low sodium error glass<\/strong> that maintains accuracy to <strong>\u00b10.02 pH<\/strong> even at pH 12.<\/p>\n<\/li>\n<\/ol>\n<h3 id=\"orp-measurement-for-redox-control\"><span class=\"ez-toc-section\" id=\"ORP_Measurement_for_Redox_Control\"><\/span>ORP Measurement for Redox Control<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Shanghai ChiMay&rsquo;s <strong>ORP sensor<\/strong> features a <strong>platinum measuring electrode<\/strong> with <strong>\u00b11 mV resolution<\/strong> and a response time of <strong>&lt;30 seconds<\/strong>\u2014critical for catching rapid redox changes during reagent addition. The sensor&rsquo;s <strong>gold reference option<\/strong> provides superior stability in chloride-rich brine environments where silver\/silver-chloride references may degrade.<\/p>\n<table>\n<thead>\n<tr>\n<th>Parameter<\/th>\n<th>Shanghai ChiMay pH Electrode<\/th>\n<th>Shanghai ChiMay ORP Sensor<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Measurement Range<\/td>\n<td>0\u201314 pH<\/td>\n<td>-2000 to +2000 mV<\/td>\n<\/tr>\n<tr>\n<td>Resolution<\/td>\n<td>\u00b10.01 pH<\/td>\n<td>\u00b11 mV<\/td>\n<\/tr>\n<tr>\n<td>Accuracy<\/td>\n<td>\u00b10.02 pH<\/td>\n<td>\u00b12 mV<\/td>\n<\/tr>\n<tr>\n<td>Response Time<\/td>\n<td>&lt;15 seconds (T90)<\/td>\n<td>&lt;30 seconds (T90)<\/td>\n<\/tr>\n<tr>\n<td>Reference System<\/td>\n<td>Gel-filled double junction<\/td>\n<td>Platinum or gold electrode<\/td>\n<\/tr>\n<tr>\n<td>Temperature Range<\/td>\n<td>0\u201380\u00b0C (continuous)<\/td>\n<td>0\u201380\u00b0C (continuous)<\/td>\n<\/tr>\n<tr>\n<td>Wetted Material<\/td>\n<td>Glass + Titanium body<\/td>\n<td>Platinum + Titanium body<\/td>\n<\/tr>\n<tr>\n<td>Communication<\/td>\n<td>Modbus RTU\/TCP, 4\u201320 mA<\/td>\n<td>Modbus RTU\/TCP, 4\u201320 mA<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"process-control-strategy-integrating-ph-and-orp-data\"><span class=\"ez-toc-section\" id=\"Process_Control_Strategy_Integrating_pH_and_ORP_Data\"><\/span>Process Control Strategy: Integrating pH and ORP Data<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Effective mineral recovery needs coordinated pH and ORP control across multiple stages. A typical brine valorization plant might implement control logic like this:<\/p>\n<p><strong>Stage 1 \u2014 Magnesium precipitation:<\/strong><br \/>\n&#8211; pH setpoint: <strong>10.4 \u00b1 0.2<\/strong> (maintained by automated NaOH dosing)<br \/>\n&#8211; ORP monitoring: Alert if ORP drops below <strong>+50 mV<\/strong> (indicates anaerobic conditions that may promote sulfide formation)<\/p>\n<p><strong>Stage 2 \u2014 Lithium carbonate precipitation:<\/strong><br \/>\n&#8211; pH setpoint: <strong>11.0 \u00b1 0.2<\/strong> (maintained by automated Na\u2082CO\u2083 dosing)<br \/>\n&#8211; ORP setpoint: <strong>+150 to +250 mV<\/strong> (controlled by air sparging or chemical oxidation if needed)<\/p>\n<p><strong>Stage 3 \u2014 Mother liquor recycle:<\/strong><br \/>\n&#8211; pH monitoring: Detect incomplete precipitation (pH drift &gt;<strong>0.3 units<\/strong> triggers alarms)<br \/>\n&#8211; ORP trending: Gradual ORP shift indicates reagent contamination or oxygen ingress<\/p>\n<p>Shanghai ChiMay sensors with <strong>Modbus RTU\/TCP<\/strong> communication let this multi-stage control strategy run inside the plant&rsquo;s existing DCS\/SCADA platform, with alarm and interlock logic programmed at the controller level.<\/p>\n<h2 id=\"economic-impact-of-precise-phorp-control\"><span class=\"ez-toc-section\" id=\"Economic_Impact_of_Precise_pHORP_Control\"><\/span>Economic Impact of Precise pH\/ORP Control<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The difference between tight and loose pH\/ORP control shows up directly in the economics:<\/p>\n<table>\n<thead>\n<tr>\n<th>Metric<\/th>\n<th>Tight Control (\u00b10.2 pH)<\/th>\n<th>Loose Control (\u00b10.5 pH)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Magnesium recovery yield<\/td>\n<td>95\u201397%<\/td>\n<td>85\u201390%<\/td>\n<\/tr>\n<tr>\n<td>Calcium contamination in Mg product<\/td>\n<td>&lt;2%<\/td>\n<td>8\u201312%<\/td>\n<\/tr>\n<tr>\n<td>Lithium recovery yield<\/td>\n<td>88\u201392%<\/td>\n<td>78\u201384%<\/td>\n<\/tr>\n<tr>\n<td>Reagent consumption (NaOH)<\/td>\n<td>Baseline<\/td>\n<td>+25\u201335%<\/td>\n<\/tr>\n<tr>\n<td>Product reprocessing rate<\/td>\n<td>&lt;5%<\/td>\n<td>20\u201330%<\/td>\n<\/tr>\n<tr>\n<td>Annual incremental revenue (50K m\u00b3\/day plant)<\/td>\n<td>Baseline<\/td>\n<td>-USD 120,000\u2013180,000<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>According to <strong>ChiMay Corp techno-economic analysis (2026)<\/strong>, the sensor investment for pH and ORP monitoring across a complete brine valorization train\u2014typically <strong>8\u201312 measurement points<\/strong>\u2014costs approximately <strong>USD 25,000\u201340,000<\/strong>. The return, through improved recovery yields and reduced reagent consumption, typically lands within <strong>6\u201310 months<\/strong>.<\/p>\n<h2 id=\"conclusion\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Selective lithium and magnesium recovery from desalination brine is a precision chemistry challenge that demands equally precise instrumentation. Shanghai ChiMay&rsquo;s pH and ORP sensor platforms\u2014\u00b10.01 pH resolution, \u00b11 mV ORP sensitivity, fouling-resistant reference systems, brine-compatible wetted materials\u2014provide the measurement foundation that lets brine valorization plants hit nameplate recovery yields and product purity specifications. As global demand for battery-grade lithium and high-purity magnesium accelerates, real-time water quality monitoring in mineral recovery operations only becomes more critical to commercial success.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>pH and ORP Windows for Lithium and Magnesium Recovery: Shanghai ChiMay Sensor Solutions Selective precipitation of lithium and magnesium from desalination brine is governed by pH windows as narrow as \u00b10.2 pH units\u2014a deviation there can shift recovery selectivity by 10\u201315%, per ChiMay Corp research (2026). ORP monitoring during magnesium recovery ensures optimal reagent dosing,&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false},"categories":[1],"tags":[134429,11598],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"ar","enabled_languages":["en","es","fr","ru","ar"],"languages":{"en":{"title":true,"content":true,"excerpt":false},"es":{"title":false,"content":false,"excerpt":false},"fr":{"title":false,"content":false,"excerpt":false},"ru":{"title":false,"content":false,"excerpt":false},"ar":{"title":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/www.chimaytech.net\/ar\/wp-json\/wp\/v2\/posts\/31383"}],"collection":[{"href":"https:\/\/www.chimaytech.net\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.chimaytech.net\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.chimaytech.net\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.chimaytech.net\/ar\/wp-json\/wp\/v2\/comments?post=31383"}],"version-history":[{"count":0,"href":"https:\/\/www.chimaytech.net\/ar\/wp-json\/wp\/v2\/posts\/31383\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.chimaytech.net\/ar\/wp-json\/wp\/v2\/media?parent=31383"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.chimaytech.net\/ar\/wp-json\/wp\/v2\/categories?post=31383"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.chimaytech.net\/ar\/wp-json\/wp\/v2\/tags?post=31383"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}