经过比较认为液相塔式氯化技术更具竞争力。
After comparison, it considered that liquid phase tower chlorination technology had much competition.
设计了以国内生产的间甲酚为原料，经过乙酰化、氯化、再酯化和醇解等四步合成间羟基苯甲醇的合成路线。
A new route to synthesize the target compound starting from m-cresol, which undergoes four steps including acetylation, chloration, esterification, and alcoholysis was proposed.
以H_2SO_4处理四甲基氯化铵的有机溶液，立即生成沉淀，经过滤、洗涤、干燥后，得到白色结晶状固体——TMAHS。
To treat tetramethyl ammonium chloride with H2SO4 in organic solvent, a precipitate is produced. A white crystallizing solid TMAHS is prepared after filtrating, washing and drying.
然而，记住水是河水，并且河床和河岸可能已经过滤了它，但进一步的处理仍是必需的(例如，氯化处理)。
However, remember the water is river water, and though it will have been filtered through the bed and bank, further treatment may be necessary (for example, chlorination).
经过调查，发现原油中含有机氯化物是造成设备腐蚀的原因，而原油中的有机氯化物是在油田采油过程中注入的含氯清、防蜡剂等化学剂所引起。
It was found by investigation and studying that the chlorine came from the wax-controlling chemicals which were added into the crude oil in oil - fields during production.
工作面要经过49个挥发性和非挥发性的化学物质的测试，包括从醋酸戊酯到氯化锌；
A list of 49 volatile and non-volatile chemicals ranging from Amyl Acetate to Zinc Chloride;
工作面要经过49个挥发性和非挥发性的化学物质的测试，包括从醋酸戊酯到氯化锌；
A list of 49 volatile and non-volatile chemicals ranging from Amyl Acetate to Zinc Chloride;
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