Process for preparing pale-colored and transparent alkyl glycosides
An alkyl glycoside, transparent technology, applied in the field of preparing alkyl glycoside, can solve the problems such as can not be reused, complicated manufacturing method, unsolved and the like
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Embodiment 1
[0061] 155 g of p-toluenesulfonic acid catalyst were added under vacuum.
[0062] The pressure was reduced to 20 torr, then the mixture was heated and reacted at a temperature between 116-120°C for 100 minutes.
[0063] Add 22g to this mixture with a specific surface area of 100m 2 / g, magnesium oxide powder with a water content of 1%. The mixture was stirred at a heating temperature of 95°C for 30 minutes.
[0064] The neutralized mixture is distilled under vacuum pressure below 0.5 torr, heating temperature below 200°C. At this point, the distilled mixture contains less than 2% by weight of the distilled reaction product of residual alcohol.
[0065] The distilled mixture was diluted with 34 kg of purified ionized water, the above amount being equal to the amount of the distilled mixture.
[0066] The diluted solution had a water content of 50% and a Gardner color number of 5.4.
[0067] 0.9 kg of 30% sodium hydroxide aqueous solution was added to the diluted mixtur...
Embodiment 2
[0071] The diluted solution had a water content of 50% and a Gardner color number of 6.0.
[0072] The bleached solution had a light and transparent alkyl glycoside with a water content of 49.5%, a transmittance of 93%, and an APHA of 48. The collected alcohol had an APHA of 10. Comparative example A
Embodiment 3
[0083] In a container equipped with an overhead stirrer and an addition funnel, add 22 parts by weight of C 8 , 17 parts by weight C 10 , 47 parts by weight C 12 and 14 parts by weight C 14 mixture of fatty alcohols. Start stirring, then mix in the glucose. The quantity of the mixture is 100 kg, and the weight ratio of fatty alcohol to glucose is 3.5.
[0084] 155 g of p-toluenesulfonic acid catalyst were added under vacuum.
[0085] The pressure was reduced to 20 torr, then the mixture was heated and reacted at a temperature between 116-120°C for 100 minutes.
[0086] Add 35g to this mixture with a specific surface area of 30m 2 / g, magnesium oxide powder with a water content of 1%. The mixture was stirred at a heating temperature of 95°C for 30 minutes.
[0087] The neutralized mixture is distilled under vacuum pressure below 0.5 torr, heating temperature below 200°C. At this point, the distilled mixture contains less than 2% by weight of the distilled reaction pr...
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