A kind of process for purification of alkyl polyglycosideTechnical field
The present invention relates to energy field, be specifically related to a kind of process for purification of alkyl polyglycoside.
Background technology
Alkyl polyglycoside is also alkyl glycoside, APG for short, synthesized by renewable resources natural fat alcohol and glucose, it is the more comprehensive new non-ionic surfactants of a kind of performance, have the characteristic of conventional nonionic and anion surfactant concurrently, having high surface, good ecological security and intermiscibility, is internationally recognized first-selection " green " functional surfactant.
The alkyl polyglycoside produced in prior art is due to the difference of production technique, and cause the quality of alkyl polyglycoside product also just to differ, Problems existing is also relatively many, as purity is poor, the impurity mixed is more, and processing step is many, troublesome poeration, the synthetic ratio of product is low, causes the wasting of resources larger.
Summary of the invention
The object of the present invention is to provide a kind of simple to operate, process for purification of producing the alkyl polyglycoside that product purity is high, quality good, product yield is large, production technique is environment friendly and pollution-free.
Technical scheme of the present invention is, a kind of process for purification of alkyl polyglycoside, comprises the steps:
1) rough processing: get glucose and fatty alcohol an acidic catalyst act on the temperature of 90-110 DEG C under be processed into alkyl polyglycoside crude product;
2) degassed: the alkyl polyglycoside of roughing to be placed on thin-film evaporator and to evaporate, the impurity in alkyl polyglycoside crude product is removed with gaseous form, obtain time fine work alkyl polyglycoside;
3) degreasing: use the method for molecular distillation to distill to secondary fine work alkyl polyglycoside, fatty alcohol in secondary fine work alkyl polyglycoside is removed in advance, leave finished product alkyl polyglycoside, the fatty alcohol distilled is reclaimed by cooling and is reused for producing of alkyl polyglycoside crude product in step 1;
4) precision work: the alkyl polyglycoside finished product obtained is carried out to second time molecular distillation and raises distillation temperature, makes all kinds of alcohol in alkyl polyglycoside finished product remove, obtains alkyl polyglycoside fine work.
In a preferred embodiment of the present invention, in described step 1, an acidic catalyst is Witco 1298 Soft Acid.
In a preferred embodiment of the present invention, in described step 2, the vaporization temperature of thin-film evaporator is 135-170 DEG C.
In a preferred embodiment of the present invention, the distillation temperature of described step 3 Middle molecule distillation is 155-200 DEG C.
In a preferred embodiment of the present invention, the distillation temperature raised in described step 4 is 30-50 DEG C.
Of the present invention is a kind of process for purification of alkyl polyglycoside, and the present invention is simple to operate, produce that product purity is high, quality good, product yield is large, production technique is environment friendly and pollution-free.
Embodiment
Below preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
Of the present invention is a kind of process for purification of alkyl polyglycoside, comprises the steps:
1) rough processing: get glucose and fatty alcohol an acidic catalyst act on the temperature of 90-110 DEG C under be processed into alkyl polyglycoside crude product;
2) degassed: the alkyl polyglycoside of roughing to be placed on thin-film evaporator and to evaporate, the impurity in alkyl polyglycoside crude product is removed with gaseous form, obtain time fine work alkyl polyglycoside;
3) degreasing: use the method for molecular distillation to distill to secondary fine work alkyl polyglycoside, fatty alcohol in secondary fine work alkyl polyglycoside is removed in advance, leave finished product alkyl polyglycoside, the fatty alcohol distilled is reclaimed by cooling and is reused for producing of alkyl polyglycoside crude product in step 1;
4) precision work: the alkyl polyglycoside finished product obtained is carried out to second time molecular distillation and raises distillation temperature, makes all kinds of alcohol in alkyl polyglycoside finished product remove, obtains alkyl polyglycoside fine work.
Further, in described step 1, an acidic catalyst is Witco 1298 Soft Acid.
Further, in described step 2, the vaporization temperature of thin-film evaporator is 135-170 DEG C.
Further, the distillation temperature of described step 3 Middle molecule distillation is 155-200 DEG C.
Further, the distillation temperature raised in described step 4 is 30-50 DEG C.
Of the present invention is a kind of process for purification of alkyl polyglycoside, and by the way, the present invention is simple to operate, produce that product purity is high, quality good, product yield is large, production technique is environment friendly and pollution-free.
The foregoing is only the specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; any those of ordinary skill in the art are in the technical scope disclosed by the present invention; the change can expected without creative work or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should limit with claims is as the criterion.