Process for producing taurine
a production process and taurine technology, applied in the field of process for the production of taurine, can solve the problems of large waste stream, low overall yield, and large waste stream, and achieve the effect of reducing the production cost, increasing the difficulty of disposal, and increasing the difficulty of ethylene oxide production
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example 1
[0031]This set of examples relates to the ammonolysis of sodium isethionate in the presence of sodium ditaurinate and in the presence of sodium hydroxide.
[0032]All examples are for 0.05 mole of sodium isethionate, dissolved in 35 mL of 20% aqueous ammonia solution in a molar ratio of 1:8 for sodium isethionate to ammonia. Calculated amount of sodium ditaurinate and sodium hydroxide is then added to the solution. The ammonolysis reaction is carried out in an 100 mL autoclave at 220° C. under autogenous pressure for two hours. The content of taurine, ditaurine, and tritaurine is assayed by HPLC analysis. The yields are calculated according to the following formula:
Taurinate Yield (%)=[Taurine] / [Sodium Isethionate]
Di+Tritaurinate Yield (%)=[Di+Tritaurine−Added Ditaurine] / [Sodium Isethionate]
[0033]
TABLE IAmmonolysis of Sodium Isethionate inthe Presence of Sodium DitaurinateDitaurinate / NaOH / Di +IsethionateIsethionateTaurinateTritaurinate(ratio by(ratio by(molar (molar Exweight)weight)yie...
example 2
[0034]This set of examples relates to the ammonolysis of sodium isethionate in the presence of sodium tritaurinate and in the presence of sodium hydroxide.
[0035]All examples are for 0.05 mole of sodium isethionate, dissolved in 35 mL of 20% aqueous ammonia solution in a molar ratio of 1:8 for sodium isethionate to ammonia. Calculated amount of sodium tritaurinate and sodium hydroxide is then added to the solution. The ammonolysis reaction is carried out in an 100 mL autoclave at 220° C. under autogenous pressure for two hours. The content of taurine, ditaurine, and tritaurine is assayed by HPLC analysis. The yields are calculated according to the following formula:
Taurinate Yield (%)=[Taurine] / [Sodium Isethionate]
Di+Tritaurinate Yield (%)=[Di+Tritaurine−Added Tritaurine] / [Sodium Isethionate]
[0036]
TABLE IIAmmonolysis of Sodium Isethionate inthe Presence of Sodium TritaurinateTritaurinate / NaOH / Di +IsethionateIsethionateTaurinateTritaurinate(ratio by(ratio by(molar (molar Exweight)weig...
example 3
[0037]This set of examples relates to the ammonolysis of sodium isethionate in the presence of a mixture of sodium ditaurinate and sodium tritaurinate obtained from the mother liquor of taurine crystallization and in the presence of sodium hydroxide and sodium sulfate.
[0038]All examples are for 0.05 mole of sodium isethionate, dissolved in 35 mL of 20% aqueous ammonia solution in a molar ratio of 1:8 for sodium isethionate to ammonia. Calculated amount sodium hydroxide is then added to the solution. A mixture of sodium ditaurinate and sodium tritaurinate, obtained from the crystallization mother liquor described as in application Ser. No. 14 / 120,046 is used. The ammonolysis reaction is carried out in an 100 mL autoclave at 220° C. under autogenous pressure for two hours. The content of taurine, ditaurine, and tritaurine is assayed by HPLC analysis. The yields are calculated according to the following formula:
Taurinate Yield (%)=[Taurine] / [Sodium Isethionate]
Di+Tritaurinate Yield (%)...
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