Refining method for recovering beta-aminopropionic acid
A kind of technology of GAPA and refining method, which is applied in the field of refining β-GAPA, which can solve the problems of low content in β-GAPA recovery process and sodium sulfate cannot be excluded, and achieve control of purification cost and recrystallization efficiency High, easy-to-operate effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0019] Example 1: Throwing 65% crude β-alanine into the reactor, adding 3 times the mass of 50% aqueous methanol solution; controlling the reaction temperature at 50°C, stirring and dissolving for 25 minutes; centrifuging to remove sodium sulfate in the methanol solution , the mother liquor is concentrated under reduced pressure to distill methanol, and the remaining mass is 18% of the total input solution, and the distillation raffinate is stirred to a slurry state, cooled to about 15°C, β-alanine crystals are precipitated, and centrifuged to obtain β-alanine Wet product, dried to get β-alanine finished product. According to empirical tests, the β-alanine content is 79.4%.
Embodiment 2
[0020] Example 2: Throwing 72% crude β-alanine into the reactor, adding 5 times the mass of 52% aqueous methanol solution; controlling the reaction temperature at 45°C, stirring and dissolving for 28 minutes; centrifuging to remove sodium sulfate in the methanol solution , the mother liquor is concentrated under reduced pressure to distill methanol, and the remaining mass is 19% of the total input solution, and the distillation raffinate is stirred to a slurry state, cooled to about 25°C, β-alanine crystals are precipitated, and centrifuged to obtain β-alanine Wet product, dried to get β-alanine finished product. According to experience, the β-alanine content is 81.3%.
Embodiment 3
[0021] Example 3: Throwing 75% crude β-alanine into the reactor, adding 3.6 times the mass of 58% aqueous methanol solution; controlling the reaction temperature at 52°C, stirring and dissolving for 30 minutes; centrifuging to remove sodium sulfate in the methanol solution , the mother liquor is concentrated under reduced pressure to distill methanol, and the residual mass of the distillation raffinate, which is 20% of the total input solution, is stirred to a slurry state, cooled to about 20°C, β-alanine crystals are precipitated, and centrifuged to obtain β-alanine Wet product, dried to get β-alanine finished product. According to empirical tests, the β-alanine content is 91.7%.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More