{"id":2619,"date":"2026-09-14T15:35:19","date_gmt":"2026-09-14T20:35:19","guid":{"rendered":"https:\/\/www.cestoil.com\/?page_id=2619"},"modified":"2026-09-14T17:12:48","modified_gmt":"2026-09-14T22:12:48","slug":"cc8289-crude-desalting-demulsifier","status":"publish","type":"page","link":"https:\/\/www.cestoil.com\/zh\/case-studies\/cc8289-crude-desalting-demulsifier\/","title":{"rendered":"Northshore CC8289: Demulsifier changeover on two crude units"},"content":{"rendered":"<div class=\"wpb-content-wrapper\" id=\"wpb-content-root\"><div class=\"vc_row wpb_row vc_row-fluid\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_raw_code wpb_raw_html wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<style>\n.ccr-case{max-width:1120px;margin:36px auto 70px;padding:0 24px;color:#414b53;font:18px\/1.75 Lato,Arial,sans-serif}\n.ccr-case *{box-sizing:border-box}.ccr-case h1,.ccr-case 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span{position:absolute;left:10px;top:4px;font-style:normal;font-size:14px;font-weight:700;line-height:20px;color:#222;white-space:nowrap}\n#case-cc8289 .ccr-legend{font-size:14px;margin:0 0 12px}#case-cc8289 .ccr-legend span{display:inline-block;margin-right:20px}#case-cc8289 .ccr-legend i{display:inline-block;width:12px;height:12px;background:#aaa;margin-right:6px}#case-cc8289 .ccr-legend .after{background:#c9ac63}\n#case-cc8289 .ccr-chart figcaption{font-size:14px;line-height:1.6;color:#666;margin-top:14px}\n@media(max-width:850px){#case-cc8289 .ccr-hero{grid-template-columns:1fr}#case-cc8289 .ccr-report-preview{margin:0 auto}}\n@media(max-width:600px){#case-cc8289 .ccr-observations{grid-template-columns:1fr;gap:22px}#case-cc8289 .ccr-observations li+li{border-top:1px solid #dedede;padding-top:18px}#case-cc8289 .ccr-chart-row{grid-template-columns:78px 1fr;gap:10px}}\n<\/style><article class=\"ccr-case\" id=\"case-cc8289\" data-publication-version=\"20260914\">\n<nav class=\"ccr-breadcrumb\" aria-label=\"\u9762\u5305\u5c51\u5bfc\u822a\"><a href=\"\/zh\/%e6%a1%88%e4%be%8b%e7%a0%94%e7%a9%b6\/\">\u6848\u4f8b\u7814\u7a76<\/a> \/ <a href=\"\/zh\/%e6%a1%88%e4%be%8b%e7%a0%94%e7%a9%b6\/#refinery-process-solutions\">\u70bc\u6cb9\u8fc7\u7a0b\u89e3\u51b3\u65b9\u6848<\/a><\/nav>\n<div class=\"ccr-hero\"><div><p class=\"ccr-label\">\u70bc\u6cb9\u5de5\u827a\u89e3\u51b3\u65b9\u6848\u00b7 \u6848\u4f8b\u7814\u7a76<\/p><h1>Northshore CC8289: Demulsifier changeover on two crude units<\/h1><p class=\"ccr-lead\">A refinery evaluated one oil-soluble demulsifier on heavy viscous and low-pour crude. At 8\u201310 ppm, Northshore CC8289 brought average desalted salt to 1.01 and 1.00 mg\/L in June 2025. The customer\u2019s acceptance reports document both the improvement and a dehydration shortfall on the heavy-crude unit.<\/p><a class=\"ccr-button\" href=\"https:\/\/www.cestoil.com\/zh\/%e7%b4%a2%e5%8f%96%e6%a1%88%e4%be%8b%e7%a0%94%e7%a9%b6\/?case=2619\">\u7d22\u53d6\u5b8c\u6574\u6848\u4f8b\u7814\u7a76<\/a><\/div><aside class=\"ccr-report-preview\" aria-label=\"\u62a5\u8868\u9884\u89c8\"><a class=\"ccr-preview-card\" href=\"https:\/\/www.cestoil.com\/zh\/%e7%b4%a2%e5%8f%96%e6%a1%88%e4%be%8b%e7%a0%94%e7%a9%b6\/?case=2619\" aria-label=\"Request the full Northshore CC8289 case study\"><img loading=\"lazy\" src=\"https:\/\/www.cestoil.com\/wp-content\/uploads\/cc8289-case-study-preview-v1.png\" width=\"160\" height=\"207\" alt=\"Small first-page preview of the Northshore CC8289 case study report\" decoding=\"async\"><\/a><p class=\"ccr-preview-caption\"><strong>\u4e24\u9875\u56fe\u6587 PDF<\/strong>\u5b8c\u6574\u62a5\u544a\u7ecf\u6279\u51c6\u540e\u53ef\u63d0\u4f9b\u3002<\/p><\/aside><\/div>\n<aside class=\"ccr-highlight\" aria-label=\"\u8bd5\u9a8c\u62a5\u544a\u4e2d\u7684\u89c2\u5bdf\u7ed3\u679c\"><p class=\"ccr-label\">\u8bd5\u9a8c\u62a5\u544a\u4e2d\u7684\u89c2\u5bdf\u7ed3\u679c<\/p><ul class=\"ccr-observations\"><li><strong>\u221250%<\/strong>Desalted salt on the low-pour crude unit: 1.99 \u2192 1.00 mg\/L.<\/li><li><strong>100%<\/strong>Of June samples at \u2264 2.0 mg\/L on both units; the requirement was at least 80%.<\/li><li><strong>8\u201310 ppm<\/strong>Reported dose, within the tender\u2019s \u2264 10 ppm ceiling.<\/li><\/ul><\/aside>\n<nav class=\"ccr-jump\" aria-label=\"\u5728\u6b64\u9875\u9762\u4e0a\"><a href=\"#operating-context\">\u64cd\u4f5c\u4e0a\u4e0b\u6587<\/a><a href=\"#monitored-application\">\u5e94\u7528<\/a><a href=\"#reported-results\">\u62a5\u544a\u7684\u8bd5\u9a8c\u7ed3\u679c<\/a><a href=\"#case-report\">\u5b8c\u6574\u6848\u4f8b\u7814\u7a76<\/a><\/nav>\n<section class=\"ccr-section\" id=\"operating-context\"><h2>\u8fd0\u884c\u80cc\u666f\u4e0e\u8bd5\u9a8c\u76ee\u6807<\/h2><div><p>A refinery runs two atmospheric\u2013vacuum crude units side by side on different slates: one on <strong>heavy viscous crude at 3,800 t\/d<\/strong>, the other on <strong>low-pour crude at 3,600 t\/d<\/strong>. Both use two-stage electrostatic desalters. The specification required desalted salt <strong>\u2264 3.0 mg\/L on every sample<\/strong> \u548c <strong>\u2264 2.0 mg\/L on at least 80%<\/strong> of samples, with desalted water <strong>\u2264 0.45% on more than 90%<\/strong> of samples in any month, at a demulsifier dose of <strong>no more than 10 ppm<\/strong>.<\/p><p>On the incumbent program, the heavy unit\u2019s reported averages were 1.53 mg\/L salt and 0.41% water; the low-pour unit\u2019s were 1.99 mg\/L and 0.36%. Cestoil proposed <strong>Northshore CC8289<\/strong>, an oil-soluble demulsifier, for both units and ran parallel industrial trials. Salt results were compared with each unit\u2019s last full month on the incumbent: April 2025 for the heavy unit and March for the low-pour unit. For water, the heavy-unit report gives a pre-trial average without naming the month.<\/p><p>The trial used fixed crude rates and nominal wash-water and interface settings. Interface levels were 35 \u00b1 10% and 30 \u00b1 10% on the heavy unit\u2019s first and second stages, and 40 \u00b1 10% on both stages of the low-pour unit. The report also records wash-water interruptions on the heavy unit, discussed below. Acceptance was assessed on <strong>June 2025<\/strong>, the second full month on CC8289.<\/p><\/div><\/section>\n<section class=\"ccr-section\" id=\"monitored-application\"><h2>\u4ea7\u54c1\u5e94\u7528\u4e0e\u76d1\u6d4b\u65b9\u5f0f<\/h2><div><p>CC8289 was injected upstream of the desalters. The low-pour unit switched on <strong>24 April 2025 at 10 ppm<\/strong>; the heavy unit switched on <strong>1 May at about 8 ppm<\/strong>. Both doses were within the tender ceiling.<\/p><p>Reported wash-water settings were 5 t\/h on the first-stage vessels and 3 t\/h on the heavy unit\u2019s second stage. Salt and water were analyzed on desalted-crude samples through <strong>30 June 2025<\/strong>. Product consumption over the trial was <strong>3.29 t<\/strong> for the low-pour unit and <strong>2.23 t<\/strong> for the heavy unit.<\/p><\/div><\/section>\n<section class=\"ccr-section ccr-result\" id=\"reported-results\"><h2>\u62a5\u544a\u7684\u8bd5\u9a8c\u7ed3\u679c<\/h2><div><p><strong>Salt approximately halved on the low-pour unit and fell by a third on the heavy unit.<\/strong> Average desalted salt decreased from <strong>1.99 to 1.00 mg\/L<\/strong> on the low-pour unit and from <strong>1.53 to 1.01 mg\/L<\/strong> on the heavy unit. On both units, <strong>100% of June samples were at or below 2.0 mg\/L<\/strong>, exceeding the 80% requirement and meeting the separate 3.0 mg\/L limit.<\/p>\n<figure class=\"ccr-chart\"><h3>Salt in desalted crude<\/h3><p class=\"ccr-legend\"><span><i aria-hidden=\"true\"><\/i>Incumbent<\/span><span><i class=\"after\" aria-hidden=\"true\"><\/i>CC8289 \u00b7 June 2025<\/span><\/p><div class=\"ccr-chart-row\"><span>Low-pour crude<\/span><div class=\"ccr-bars\"><div class=\"ccr-bar\"><i style=\"width:79.60%\" aria-hidden=\"true\"><\/i><span>1.99 mg\/L<\/span><\/div><div class=\"ccr-bar after\"><i style=\"width:40.00%\" aria-hidden=\"true\"><\/i><span>1.00 mg\/L<\/span><\/div><\/div><\/div><div class=\"ccr-chart-row\"><span>Heavy crude<\/span><div class=\"ccr-bars\"><div class=\"ccr-bar\"><i style=\"width:61.20%\" aria-hidden=\"true\"><\/i><span>1.53 mg\/L<\/span><\/div><div class=\"ccr-bar after\"><i style=\"width:40.40%\" aria-hidden=\"true\"><\/i><span>1.01 mg\/L<\/span><\/div><\/div><\/div><figcaption>Figure 1. Reported monthly average salt: March 2025 for the low-pour incumbent and April for the heavy-unit incumbent, compared with June 2025 on CC8289. Every June sample on both units met the \u2264 2.0 mg\/L criterion.<\/figcaption><\/figure>\n<p><strong>Average water content decreased on both units.<\/strong> Desalted water fell from <strong>0.36% to 0.22%<\/strong> on the low-pour unit and from <strong>0.41% to 0.29%<\/strong> on the heavy unit. The low-pour unit\u2019s June pass rate at \u2264 0.45% water was <strong>96.7%<\/strong>, exceeding the requirement of more than 90%.<\/p>\n<figure class=\"ccr-chart\"><h3>Water in desalted crude<\/h3><p class=\"ccr-legend\"><span><i aria-hidden=\"true\"><\/i>Incumbent<\/span><span><i class=\"after\" aria-hidden=\"true\"><\/i>CC8289 \u00b7 June 2025<\/span><\/p><div class=\"ccr-chart-row\"><span>Low-pour crude<\/span><div class=\"ccr-bars\"><div class=\"ccr-bar\"><i style=\"width:60.00%\" aria-hidden=\"true\"><\/i><span>0.36 %<\/span><\/div><div class=\"ccr-bar after\"><i style=\"width:36.67%\" aria-hidden=\"true\"><\/i><span>0.22 %<\/span><\/div><\/div><\/div><div class=\"ccr-chart-row\"><span>Heavy crude<\/span><div class=\"ccr-bars\"><div class=\"ccr-bar\"><i style=\"width:68.33%\" aria-hidden=\"true\"><\/i><span>0.41 %<\/span><\/div><div class=\"ccr-bar after\"><i style=\"width:48.33%\" aria-hidden=\"true\"><\/i><span>0.29 %<\/span><\/div><\/div><\/div><figcaption>Figure 2. Reported average water content on CC8289 in June 2025 versus the incumbent. The low-pour baseline is March; the heavy-unit report does not identify the month for its pre-trial water average. Lower monthly averages do not by themselves establish the sample pass rate.<\/figcaption><\/figure>\n<p><strong>The heavy unit had one acceptance shortfall.<\/strong> Its June dehydration pass rate was <strong>86.3%<\/strong>, below the requirement of more than 90%. The report attributes the shortfall to nighttime swings in heavy-crude water content, during which operators sometimes stopped desalter wash-water injection to maintain unit stability. It records a pass rate of <strong>93.1% with those periods excluded<\/strong>. That adjusted figure does not replace the full-month result.<\/p><p>The low-pour unit\u2019s report concludes that CC8289 outperformed the incumbent demulsifier; the heavy-unit report makes no comparative verdict. Both reports close with acceptance sheets signed by production operations, quality inspection, procurement and the deputy general manager.<\/p><\/div><\/section>\n<section class=\"ccr-section\" id=\"operational-value\"><h2>\u8fd0\u884c\u4ef7\u503c<\/h2><div><p>The reports provide no monetary figure. They assess the application in process terms: desalted salt and water, dose limits and downstream operating concerns. On those terms, both units recorded lower average salt and water at doses within the tender ceiling.<\/p><p>For another unit, an economic evaluation can examine overhead chloride load, neutralizer and corrosion-inhibitor consumption, and crude-tower and heat-exchanger run length alongside the demulsifier dose and cost. These are evaluation inputs; the trial reports do not quantify savings in those areas.<\/p><\/div><\/section>\n<section class=\"ccr-section\" id=\"applying-findings\"><h2>\u5982\u4f55\u5e94\u7528\u8bd5\u9a8c\u7ed3\u679c<\/h2><div><p>For a demulsifier changeover, document wash-water rates, interface levels and crude rate so that the baseline and treatment periods can be compared. Use the immediately preceding full month on the incumbent where the feed and operating records support that comparison, and judge acceptance on a full month rather than the changeover weeks.<\/p><p>Log the operating circumstances behind every out-of-range dehydration result. This trial\u2019s heavy-unit shortfall coincided with reported wash-water interruptions. Review both the complete monthly result and any explicitly defined adjusted analysis; the before-and-after comparison does not isolate every operating influence from chemical performance.<\/p><\/div><\/section>\n<section class=\"ccr-request\" id=\"case-report\"><h2>\u63a2\u8ba8\u7c7b\u4f3c\u5e94\u7528<\/h2><p>Request the full illustrated case study and share your crude slate and throughput, the last full month of desalted salt and water records, the current demulsifier and dose, and the desalter stages, wash-water rate, interface control and mixing-valve pressure drop.<\/p><a class=\"ccr-button\" href=\"https:\/\/www.cestoil.com\/zh\/%e7%b4%a2%e5%8f%96%e6%a1%88%e4%be%8b%e7%a0%94%e7%a9%b6\/?case=2619\">\u7d22\u53d6\u5b8c\u6574\u6848\u4f8b\u7814\u7a76<\/a><p class=\"ccr-small\" style=\"margin-top:16px\">Company details and intended use are reviewed before the detailed PDF is released. For application support, <a href=\"\/zh\/%e8%81%94%e7%b3%bb%e6%88%91%e4%bb%ac\/\">\u8054\u7cfb\u6211\u4eec\u7684\u6280\u672f\u56e2\u961f<\/a>.<\/p><\/section>\n<p class=\"ccr-small\">Source: Customer acceptance reports for two atmospheric\u2013vacuum crude units at the participating refinery, covering industrial trials in April\u2013June 2025 against March\/April 2025 salt baselines, as summarized in Cestoil case study CS-CDU-CC8289-2026A, v1.0. All operating figures are reported by the customer. Percentage changes are rounded from the reported values. Performance reflects the specific trial conditions and may vary with feed quality and operating conditions.<\/p>\n<nav class=\"ccr-links\" aria-label=\"\u76f8\u5173\u9875\u9762\"><a href=\"\/zh\/%e4%ba%a7%e5%93%81%e5%ba%94%e7%94%a8\/%e7%82%bc%e6%b2%b9%e5%b7%a5%e8%89%ba%e8%a7%a3%e5%86%b3%e6%96%b9%e6%a1%88\/%e7%a0%b4%e4%b9%b3%e5%89%82\/\">\u539f\u6cb9\u9884\u5904\u7406\u2014\u2014\u8131\u76d0\u4e0e\u7834\u4e73<\/a><a href=\"\/zh\/%e4%ba%a7%e5%93%81%e5%ba%94%e7%94%a8\/%e7%82%bc%e6%b2%b9%e5%b7%a5%e8%89%ba%e8%a7%a3%e5%86%b3%e6%96%b9%e6%a1%88\/\">\u70bc\u6cb9\u8fc7\u7a0b\u89e3\u51b3\u65b9\u6848<\/a><a href=\"\/zh\/%e6%a1%88%e4%be%8b%e7%a0%94%e7%a9%b6\/\">\u5168\u90e8\u6848\u4f8b\u7814\u7a76<\/a><\/nav>\n<\/article>\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Northshore CC8289 reduced desalted salt on heavy and low-pour crude units at 8\u201310 ppm. 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