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富马酸的几种制备工艺大家了解吗?
来源:http://www.jnjrh.com 日期:2020-01-15 发布人:admin
  富马酸是一种无色可燃晶体,由丁烯羧酸衍生而来。属于环保可再生化工原料。生产环境与设备不同,生产的富马酸质量也参差不齐。之前我们了解了“富马酸的应用范围是什么?”,今天,我们来谈谈富马酸的几种制备工艺。
  Fumaric acid is a colorless and combustible crystal derived from butene carboxylic acid. It belongs to environmental protection and renewable chemical raw materials. The quality of fumaric acid varies with the production environment and equipment. Previously we learned "what is the application scope of fumaric acid?" Today, we will talk about several preparation processes of fumaric acid.
  1. 表面活性剂法
  1. Surfactant method
  又称乳化分离法。根据反丁烯二酸的熔点不同,在一定时期内固体和液体两相分别在不同阶段的混合反丁烯二酸分散在含有表面活性剂和电解质溶液中,形成一个更加分散的系统,根据不同的系统在每个阶段密度、重型和轻型的离心机分离阶段,原油的酸,用分子蒸馏法、反丁烯二酸的纯度高。该方法产生的废水较多,分离纯度较低。
  Also known as emulsion separation. According to the different melting points of fumaric acid, the mixture of solid and liquid phases in different stages of fumaric acid is dispersed in the solution containing surfactant and electrolyte in a certain period, forming a more dispersed system. According to the different systems in each stage of density, heavy and light centrifuge separation stage, the acid of crude oil is purified by molecular distillation and fumaric acid High degree. This method produces more waste water and lower separation purity.
  2. 蒸馏方法
  2. Distillation method
  根据反丁烯二酸碳链的长度和沸点进行分离。由于反丁烯二酸的原料主要是C16和C18的混合物,用精馏法可以很好地分离出C16,但很难分离出C18的同源物。因此,精馏法生产的酸一般冰点较高,一般在15℃以上,用这种方法很难得到冰点较低的酸。该方法得到的酸主要用于醇酸树脂、二聚酸等的制备。
氨基磺酸
  The separation is based on the length and boiling point of the carbon chain of fumaric acid. Because the raw material of fumaric acid is mainly the mixture of C16 and C18, C16 can be separated well by distillation, but it is difficult to separate C18 homologues. Therefore, the freezing point of the acid produced by distillation is generally higher than 15 ℃, so it is difficult to get the acid with lower freezing point by this method. The acid obtained by this method is mainly used for the preparation of alkyd resin and dimeric acid.
  3.尿素混合物是合法的
  3. Urea mixture is legal
  原则是尿素分子形成稳定的结晶与饱和反丁烯二酸或夹杂物在焊接过程中不饱和反丁烯二酸和沉淀,而多价不饱和反丁烯二酸有一定的空间配置多个双键和碳链弯曲,所以它不容易被尿素封装。该方法可以制备高纯酸,但成本高,收率低。
  The principle is that urea molecules form stable crystallization with saturated fumaric acid or inclusions in the process of welding unsaturated fumaric acid and precipitation, while polyvalent unsaturated fumaric acid has certain space configuration with multiple double bonds and carbon chain bending, so it is not easy to be encapsulated by urea. This method can be used to prepare high purity acid with high cost and low yield.
  4. 冻结的新闻的方法
  4. Methods of frozen news
  首先将反丁烯二酸会融化成一个方形浅铝板,在寒冷的房间冷却凝固,产生的再次盘披萨,一袋,堆栈在垂直压碎机,压力使低熔点液体酸慢慢流,这样饱和和不饱和延胡索酸酯反丁烯二酸分离,纯度(通常用冰点)取决于固体温度冷却。冷压法对设备要求低,工艺简单,但占地面积大,劳动强度高,效率低,不能连续操作。适合小作坊生产,不适合大型企业生产。此外,生产企业经常出现脏、乱、差的现象。
  First, the fumaric acid will be melted into a square shallow aluminum plate, cooled and solidified in a cold room, resulting in a second plate of pizza, a bag, stacked in a vertical crusher, the pressure makes the low melting point liquid acid flow slowly, so that the saturated and unsaturated fumaric acid fumaric acid are separated, and the purity (usually ice point) depends on the solid temperature cooling. The cold pressing method has low requirements for equipment and simple process, but it covers a large area, has high labor intensity and low efficiency and cannot be operated continuously. Suitable for small workshop production, not suitable for large enterprise production. In addition, the production enterprises often appear dirty, disorderly and poor.
  氨基磺酸生产厂家为大家介绍了富马酸的几种制备工艺。综上所述,目前只能采用冷冻压制和结晶压制法生产富马酸。剩下的方法要么造成环境污染,要么产生明显缺陷的产品,不能用于生产。
  Several preparation processes of fumaric acid were introduced by the manufacturer of sulfamic acid. To sum up, at present, fumaric acid can only be produced by freezing pressing and crystallization pressing. The remaining methods either cause environmental pollution or produce products with obvious defects and cannot be used for production.