Method and equipment for continuous production of dimethyl succinyl succinate
A technology of dimethyl succinyl succinate and dimethyl succinate, which is applied to the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, and can solve the problem of improving product yield and quality Unsatisfactory, unstable product quality between batches, high production cost, etc., to achieve the effect of improving single utilization rate, reducing production cost and increasing reaction yield
Active Publication Date: 2021-08-03
河北彩客新材料科技股份有限公司
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[0009] When the prior art adopts the above method to synthesize DMSS, most of them adopt intermittent batch reaction, which not only has low yield, high production cost, but also has defects such as unstable product quality between batches.
[0010] The Chinese patent application with the application number 201710409685.9 discloses a method for continuous production of dimethyl succinate, but its technical scheme only records that the reactant is continuously added dropwise to a certain liquid level, and then the material is continuously transferred. Obtain dimethyl succinyl succinate sodium salt, then acidify in batches to obtain dimethyl succinyl succinate, the process is relatively simple, but the actual continuous production needs to carry out complicated process and equipment design, according to the The method disclosed in the application continuously produces dimethyl succinyl succinate, and the improvement effect of product yield and quality is not satisfactory
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[0024] like figure 1 As shown, the apparatus for continuously producing the dimethyl dikaric acid dimethyl oxide method includes a condensation reaction kettle 1, a rectification device, an intermediate kettle 2, and an acidified reaction kettle 3; the condensation reaction kettle 1 central feed port The DMS metering feed device 4 and a sodium sodium metric feeding device 5; the rectification device includes a rectification column 6 and a condenser 7, and the rectifier column 6 is disposed at the top of the condensation reaction kettle 1, the condenser 7 The imported connection rectification column 6, the exit is attached to the top and methanol receiving tank 8, respectively; the condensation reactor 1 bottom discharge port is connected to the intermediate kettle 2 feed port, the intermediate kettle 2 discharge port is acidified The kettle 3 feed port, the acidified reaction kettle 3 feed port also connects the sulfuric acid high tank 9, and the acidified reaction is also attache...
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The invention discloses a method for continuous production of dimethyl succinyl succinate, the condensation reaction and acidification reaction can be carried out continuously, and a rectification device is added to the reaction kettle, which not only realizes the continuous condensation, It also avoids the recycling of materials again. The invention also discloses equipment for continuous production of dimethyl succinyl succinate, including a condensation reaction kettle, a rectification device, an intermediate kettle and an acidification reaction kettle. Continuous production of dimethyl diacylsuccinate. By adopting the continuous process and equipment of the present invention, the output is increased by more than 30% compared with the batch method, the reaction yield is increased to more than 85%, and the total production cost is reduced by about 20%.
Description
Technical field [0001] The present invention relates to the field of chemical production, and more particularly to a method of continuously producing butarcanoxyclic acid dimethyl esters, and a dedicated apparatus for carrying out this method. Background technique [0002] QuinaCridane pigments (Quinacridane, referred to as Qa) is a high-grade pigment, and 1958 was first put on the market by DuPont. Although the quinacridone pigment is small, the molecular structure is simple, and there is excellent heat resistance, solvent resistance and migration resistance. Its chromatography has red, purple and orange. Since it has good lascarat, weather resistance, thermal stability, and widely used in high-end car paint, repair, high-grade coatings, inks and engineering plastics. [0003] Dimethyl succinylsuccinate (DMSS) is a key intermediate for the manufacture of quine-like serial columns. In recent years, with the rapid development of China and the global automotive industry, the intern...
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IPC IPC(8): C07C67/313C07C69/757
CPCC07C67/313C07C67/343C07C2601/14C07C2601/16C07C69/757
Inventor 任全胜王淑梅贺金仓李祥金邵玉凤孙玉亮付鹏张晶晶崔凤桐金娟娟
Owner 河北彩客新材料科技股份有限公司