Method and apparatus for removing impurity in secondary methionine mother liquor
A technology for methionine mother liquor and impurities, applied in chemical instruments and methods, preparation of organic compounds, purification of alkali metal sulfites/sulfates, etc., can solve the problem of reducing the yield of methionine and sodium sulfate, loss of methionine and sodium sulfate, increasing Environmental protection costs and other issues, to achieve the effect of reducing load and consumption, optimizing product quality, and improving yield
Active Publication Date: 2014-04-23
NINGXIA UNISPLENDOUR TIANHUA METHIONINE CO LTD
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[0003] But it is not a good measure to discharge mother liquor as waste liquid, because it leads to the loss of methionine and sodium sulfate contained therein, and the cost of waste liquid treatment and consumables are very high, which will increase environmental protection costs and reduce the yield of methionine and sodium sulfate
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[0017] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0018] figure 1 It is a process flow diagram of the present invention, as shown in the figure, the device for removing impurities in the secondary methionine mother liquor of the present invention includes a mother liquor storage tank to be treated, an adsorption tank, a filter and a finished mother liquor storage tank, and the mother liquor storage tank to be treated is The tank is communicated with the inlet of the adsorption tank, the outlet of the adsorption tank is communicated with the inlet of the filter, and the filtrate outlet of the filter is communicated with the finished mother liquor storage tank; the tank body of the adsorption tank has a heating jacket, and the tank The inside is filled with adsorbent; the filter is a precision filter made of ceramic, resin or metal material, and the filter aperture of the precision filter...
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The invention discloses a method and an apparatus for removing impurity in a secondary methionine mother liquor, which comprises the following steps: heating the secondary methionine mother liquor to the temperature of 30-100 DEG C, then adding 1-10g of adsorbent in each liter of the secondary methionine mother liquor, insulating and absorbing for 10 minutes-90 minutes, and finally filtering the absorbed secondary methionine mother liquor. The adsorbent is diatomite, active carbon or activated clay. The apparatus of the present invention comprises a storage tank for the mother liquor to be treated, an adsorption pot, a filter and a storage tank for the finished product mother liquor. The storage tank for the mother liquor to be treated is communicated to the inlet of the adsorption pot, the outlet of the adsorption pot is communicate to the inlet of the filter, and the filtrate outlet of the filter is communicated to the storage tank for the finished product mother liquor. According to the invention, the impurity accumulation in the mother liquor is reduced, the mother liquor with better quality is obtained, thereby the yield of methionine and sodium sulfate can be enhanced, and the product quality of methionine and sodium sulfate obtained by recovering through the mother liquor having better quality can be optimized.
Description
technical field [0001] The invention belongs to the technical field of separation and purification, and in particular relates to a method and a device for removing impurities in a secondary methionine mother liquor. Background technique [0002] A method for preparing methionine includes neutralizing a sodium methionine solution under acidic conditions. The solution obtained after neutralizing sodium methionine with sulfuric acid mainly contains methionine and sodium sulfate, and then separates methionine in crystal form by crystallization. However, the mother liquor after separation of methionine (called secondary methionine mother liquor) still contains a certain amount of methionine and sodium sulfate, therefore, it is preferable to recycle the mother liquor. In this case, all the mother liquor is recycled, and impurities in the recycled mother liquor (organic impurities in the mother liquor, ammonium sulfate, iron sulfate, etc.) accumulate, and therefore need to be disc...
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IPC IPC(8): C07C323/58C07C319/28C01D5/16
Inventor 罗玉成杨平杨勇李勇周玲丽鞠远波方善伦陈志江刘道伟金海琴
Owner NINGXIA UNISPLENDOUR TIANHUA METHIONINE CO LTD