Method or recycling threonine from threonine crystallization mother solution
A technology for crystallizing mother liquor and threonine, which is applied in the field of threonine recovery, can solve problems such as complex composition of feed liquid, and achieve high economic benefits
Active Publication Date: 2017-05-10
SANDA FILM SCI & TECH XIAMEN
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Problems solved by technology
[0002] The threonine crystallization mother liquor contains a large amount of threonine, which has great recovery value; but because of the complex composition of the feed liquid, the threonine crystallization mother liquor is generally sold directly to feed manufacturers in the traditional process
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Embodiment 1
[0028] A method for recovering threonine from threonine crystallization mother liquor, the threonine crystallization mother liquor is dark reddish brown to black, wherein the threonine concentration is 13-15%, the residual sugar content is 4-6%, salt The content is 2-3%, pH=5-6, and the purity of threonine is 35-45%, which specifically includes the following steps:
[0029] (1) Use a 50-100nm ceramic membrane to clarify the above-mentioned threonine mother liquor, the operating pressure is 0.2-0.3MPa, the concentration ratio is 15-20 times, and the average membrane flux is 120-135LMH, making its color change to red The clear and transparent liquid, wherein the threonine purity increased to 51 ~ 56%, the specific operations and results are shown in Table 1 and Table 2:
[0030] Table 1 The test operation parameters of each batch of ceramic membrane
[0031] batch Ceramic membrane pore size Feeding amount Filtrate volume Concentration factor operating pressu...
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The invention discloses a method or recycling threonine from a threonine crystallization mother solution. The method specifically comprises the following steps: (1) carrying out clarification treatment on the threonine mother solution by adopting a ceramic membrane with the size of 50nm to 100nm, wherein the operation pressure is 0.2MPa to 0.3MPa, the multiple of concentration is 15 to 20 times and the average membrane flux is 120LMH to 135LMH; converting the solution into red clarified transparent liquid; (2) conveying a material obtained by the step (1) into a strong-acid cation-exchange resin continuous moving bed which rotates from left to right to obtain a threonine product solution. According to the method disclosed by the invention, a ceramic membrane and continuous ion-exchange method is adopted aiming at a material solution characteristic of the threonine crystallization mother solution, and a lot of threonine in the threonine crystallization mother solution is recycled, so that the method has very high economic benefits.
Description
technical field [0001] The invention belongs to the technical field of amino acid recovery, and in particular relates to a method for recovering threonine from threonine crystallization mother liquor. Background technique [0002] The threonine crystallization mother liquor contains a large amount of threonine, which has great recovery value; however, due to the complex composition of the feed liquid, the threonine crystallization mother liquor is generally sold directly to feed manufacturers in traditional processes. It is reported in related literature that threonine crystallization mother liquor is recovered by chromatographic separation, and the recovered threonine has a purity of about 85%, a concentration of about 8%, and a yield of about 85%. Contents of the invention [0003] The purpose of the present invention is to overcome the defects of the prior art and provide a method for recovering threonine from threonine crystallization mother liquor. [0004] Technical...
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Login to View More IPC IPC(8): C07C229/22C07C227/40
CPCC07C227/40C07C229/22
Inventor 吴发辉何阿云王贝辉林雄水苏义鹏蓝伟光
Owner SANDA FILM SCI & TECH XIAMEN