CN1047532A - The glycerol extraction of fermentative Production glycerine - Google Patents

Abstract

Glycerine is the important source material of industry such as light industry, chemical industry, medicine, be that raw material carries out the effective way that fermentative Production glycerine is the glycerine source with organism such as carbohydrate, and the glycerol extraction of fermentative Production glycerine is still a difficult problem.The present invention adopts the glycerol extraction that adds inorganic material powders vacuum distilling, and purifying treatment is simple, can make the distillation efficiency of glycerine reach 80-90%, and bird nest is very easy removes in distillation, is a less investment, and cost is low, the ferment glycerin extractive technique of simple and feasible.

Description

The glycerol extraction of fermentative Production glycerine

The present invention relates to the especially extractive technique of ferment glycerin of fermentative Production glycerine.

Glycerine is industrial important source material such as light industry, chemical industry, medicine, and glycerine source domestic waste water with soap industry at present is extracted as the master, and external chemical industry synthetic ratio is bigger.Adopting organism is that to carry out fermentative Production glycerine then be a new way for matrix such as carbohydrate.This method extracts glycerine and there is notable difference in above-mentioned glycerine source.Owing to organism such as the carbohydrate that contains high density in the fermented liquid, dextrin, starch, colloids, when concentrated, can be clamminess strongly, and glycerin extraction distillatory boiling point is very high, distillation even vacuum tightness is very high, also can cause above-mentioned organic serious coking for a long time.At this moment, not only hindered the vaporization of glycerine composition because of viscosity is especially big, but also can produce thick and hard bird nest, made distillation procedure be difficult to carry out, container can't clean.Past attempts has been carried out vacuum distilling, solvent extration, ion-exchange and ion repulsion method or intersection are used the extensive application and the research of extracting glycerine with, but the effect that has is bad, the cost that has is too high, so Practical significance is little, be one of key of fermentative Production glycerine industry consolidation, stability and development so extract the glycerine technology.The objective of the invention is to seek a kind of simple to operate, extraction yield is high, with low cost, the extraction process that is easy to promote, be not only applicable to the extraction of fermentation method glycerine, and also be possible from the easy pyrogenic solvent of high viscosity, adopting evaporation or distillation extraction high boiling point component substances.

Extraction process of the present invention is: glycerol fermented broth purification-concentrate-distillation-dilution is decoloured, is gone to smell-concentrate.Concrete implementation method is: glycerol fermented broth contains glycerine 8-12%, residual sugar 1.5-4.5% approximately, add diatomite as flocculating aids, every square metre of filtration area 200-400 gram of dosage carries out the sheet frame hydraulic fluid, and vacuum concentration to glycerol content is 40-60% then, contain residual sugar 15-60% in the concentrated solution this moment, add account for residual sugar amount 10-50% inorganic material powders with perlite, attapulgite, diatomite, potteries etc. carry out vacuum distilling for well under 600-750mmHg vacuum tightness.Begin to flow out glycerine about 130 ℃, when temperature rise to 180 ℃ then vacuum distilling finish.Distillate merges and to be diluted to glycerol content about 50%, is heated to more than 95 ℃ 20 minutes, is cooled to 80-85 ℃ and adds gac 1%(w/v), to stir, filtered while hot, decolouring, deodorizing, and then evaporation obtain 95% and concentrate industry glycerol.

Glycerol extraction of the present invention, the fermented liquid purifying treatment is simple, only adds the flocculating aids filtration and gets final product.In still-process, add inorganic material powders, make sugared content very big even surpass under the situation of glycerol content, the distillation yield of glycerine also can reach 80-90%, even more than 90%, and very easy the removing of thick and hard bird nest that produces, be convenient to carry out continuously the vacuum distilling operation, under the situation that does not increase utility appliance, make the vacuum distilling operation normally to carry out in the past be achieved, because that institute adds the inorganics price is very cheap, chemical stability is extremely strong, so be a less investment, maintenance costs are low, cost is low, simple, as to be easy to promote new technology.

Existing glycerol extraction, fermented liquid cleaning section complexity will add Ca(OH) ₂Destroy the part residual sugar Deng in advance, add atlapulgite again and stir, refilter.In addition, in still-process, the coking hardening of residual sugar makes glycerine be difficult to distillation, distillation efficiency is descended greatly, thick and hard bird nest then makes distillation procedure carry out, bird nest is got rid of difficult unusually, generally works as glycerine: then distillation is very difficult less than 4 for residual sugar, and work as glycerine: residual sugar can't carry out less than 2 distillation procedures.

The invention provides a kind of brand-new technology, because distillation can be at glycerine: residual sugar is situation under smoothly to operate at 1: 1, so cleansing operation is greatly simplified, whole distillation yield can reach 80-90%, even more than 90%, on the basis of simplifying technology and reducing the cost, the production of fermentation method glycerine can and be deposited economically with other method.

Embodiment:

Glycerol fermented broth: glycerine contains/100 milliliters of 5.9 grams, and sugar contains/100 milliliters of 1.7 grams, contains glycerine 42 grams.Vacuum suction filter, every square metre adds diatomite 300 grams, gets 490 milliliters of scavenging solutions.Add attapulgite 3.5 grams, vacuum distilling under 750mmHg vacuum tightness, redilution also adds 1% activated carbon decolorizing, deodorizing, concentrated, last real glycerine 38 grams that get, distillation efficiency is 90%, bird nest promptly floats with hot-water soak to be removed.

Claims (3)

1, a kind of with organism such as powder glucose, enzyme process Glucose Liquid, acid system Glucose Liquid, molasses are produced glycerine for the fermenting raw materials method, extract the technology of glycerine with the method for vacuum distilling, feature of the present invention is: add the purification of flocculating aids diatomite, press filtration in glycerol fermented broth, obtain containing sugar-fermenting glycerine filtrate,, in concentrated solution, add inorganic material powders the purifying filter liquor vacuum concentration, carry out vacuum distilling, redilution obtains 95% industry glycerol after activated carbon decolorizing, deodorizing, evaporation.

2, ferment glycerin extractive technique as claimed in claim 1, the inorganic material powders that adds when it is characterized in that vacuum distilling is powder such as perlite, attapulgite, diatomite, pottery, addition is the 10-50% of residual sugar content in the concentrated solution.

3, as claim 1,2 described ferment glycerin extractive techniques, it is characterized in that purifying institute by glycerol fermented broth, to add diatomaceous amount be that every square metre of filtration area 200-400 restrains, the glycerol content of concentrated solution is 40-60% during vacuum concentration, and vacuum tightness is 600-750mmHg during vacuum distilling.