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氨基磺酸也可以采用这样的方式生产!
来源:http://www.jnjrh.com 日期:2019-07-09 发布人:admin
①以尿素为原料,与发烟硫酸作用,反应在45℃以下进行,由于放热,应注意冷却,反应结束后,保持低温数小时,然后加热至 80~90℃,蒸出多余的三氧化硫,过滤、洗涤,在水中重结晶制得。在加入尿素时,应徐徐加入,避免因放热过激使温度升高。
(1) With urea as raw material and fuming sulfuric acid, the reaction proceeds below 45 C. Due to exothermic heat, attention should be paid to cooling. After the reaction is finished, the reaction should be kept at low temperature for several hours, then heated to 80-90 C. The excess sulfur trioxide is evaporated, filtered and washed, and recrystallized in water. When urea is added, it should be added slowly to avoid the temperature rising due to excessive heat release.
②液氨和硫酸进行气相反应,然后水解,可制得。副产硫酸铵及硫酸。此法反应条件苛刻,设备材质要求高,纯度及收率均低,只适合生产粗制。
(2) The liquid ammonia reacts with sulfuric acid in the gas phase and then hydrolyzes to produce. By-product ammonium sulfate and sulfuric acid. This method has strict reaction conditions, high material requirements, low purity and yield, and is only suitable for rough production.
③尿素和氯磺酸反应制得。
(3) Urea was prepared by reaction with chlorosulfonic acid.
尿素和氯磺酸反应方程式
氨基磺酸
Reaction Equation of Urea and Chlorosulfonic Acid
④三氧化硫和液氨反应,生成氨基亚硫酸氨,进一步与硫酸作用,可制得。此法同①。
(4) Sulfur trioxide reacts with liquid ammonia to produce ammonia sulfite, which can be prepared by further reacting with sulfuric acid. This method is the same.
4NH3+2SO3→;2NH2SO3NH4
4NH3+2SO3_2NH2SO3NH4
2NH2SO3NH4+H2SO4→2[1]+(NH4)2SO4
2NH2SO3NH4+H2SO4_2[1]+(NH4)2SO4
近年来国内氨基磺酸生产发展很快 , 但氨基磺酸属精细化工产品, 无专业设计单位,也不可能进行行业交流 ,各建厂单位多根据文献或按试验数据自行开发,因而不少企业投产后生产不正常 ,或是产量达不到要求 ,使成本偏高 ,或是产品质量达不到优等品, 只能降价销售 ,造成企业亏损 。就目前情况来看, 一等品氨基磺酸因生产容易, 产量大,售价低 。
In recent years, the production of aminosulfonic acid has developed rapidly in China. However, aminosulfonic acid is a fine chemical product. Without professional design units, it is impossible to carry out industrial exchanges. Most of the plant-building units develop their own products on the basis of literature or experimental data. As a result, many enterprises produce irregular products after putting into production, or their output fails to meet the requirements, resulting in high costs, or The quality of products can not reach the high-quality products, can only be sold at reduced prices, resulting in losses for enterprises. As far as the present situation is concerned, the first-class aminosulfonic acid has the advantages of easy production, large output and low price.
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The above wonderful content is supported by sulfamic acid, and there are many wonderful contents waiting for you to see. Welcome to continue to pay attention to our website: http://www.jnjrh.com and look forward to your attention!
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