发明名称 |
METHODS FOR DETERMINING LOW SULFATE CONCENTRATIONS IN SYNTHETIC UREA SAMPLES, PRODUCED IN A MANUFACTURING PROCESS AND CONTAINING HIGH LEVELS OF IMPURITIES |
摘要 |
In one aspect, disclosed herein is a method for determining sulfate concentration in a sample, comprising: a) providing a liquid sample comprising urea and at least one impurity; b) concentrating the liquid sample under conditions effective to reduce the liquid volume; c) forming a dilute sample solution by diluting the concentrated liquid sample of step b) in water; and d) analyzing the dilute sample solution of step c) with ion chromatography to determine if a concentration of sulfate is present in the provided liquid sample of step a); wherein the analyzing of step d) is capable of determining the presence of a sulfate concentration present in an amount less than about 1 ppm. |
申请公布号 |
WO2016012925(A1) |
申请公布日期 |
2016.01.28 |
申请号 |
WO2015IB55450 |
申请日期 |
2015.07.17 |
申请人 |
SABIC GLOBAL TECHNOLOGIES B.V. |
发明人 |
MAHMOOD, KHALID;AL-HAIZ, NAJI;KHAMEES AL-YOUSUF, MUHAMMAD;AHMAD AL-REBEH, ABDULRAHIM |
分类号 |
G01N30/88;B01D15/36;C05C9/00;G01N30/96 |
主分类号 |
G01N30/88 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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