CN105063249A - Sulfate radical circulation xylose process - Google Patents
Sulfate radical circulation xylose process Download PDFInfo
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- CN105063249A CN105063249A CN201510429418.9A CN201510429418A CN105063249A CN 105063249 A CN105063249 A CN 105063249A CN 201510429418 A CN201510429418 A CN 201510429418A CN 105063249 A CN105063249 A CN 105063249A
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- Prior art keywords
- sulfate radical
- xylose
- bipolar membrane
- hydrolysis
- electrodialyzer
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Abstract
The invention discloses a sulfate radical circulation xylose process comprising the following steps that (1) sulfuric acid is adopted as a catalyst; a corn cob is added into a hydrolysis kettle and is subjected to hydrolysis steaming; xylose hydrolysate is directly introduced to an electrodialyzer; sulfate ions are enriched with a bipolar membrane and the sulfate radical removal is realized, such that a xylose hydrolysis solution is obtained; (2) enriched liquid obtained through the enrichment with the bipolar membrane in the step (1) is delivered to the hydrolysis kettle through a water solution, and is recycled. With the process, a problem of severe pollution in the prior art is solved, and the sewage discharge amount is reduced. The process can be used in large-scale productions, and assists in further development of enterprises. The method has a good market prospect and great potential.
Description
Technical field
The present invention relates to a kind of xylose process, particularly relate to the xylose process of a kind of sulfate radical circulation.
Background technology
wood sugarbe a kind of by wood chip, straw,
corn cobetc. being rich in
hemicelluloseplant warp
hydrolysisand a kind of five-carbon sugar obtained, be soluble in hot ethanol and
pyrimidine,
sugarinessfor 67% of sucrose.Wood sugar is similar to the chemical property of glucose, can be reduced to corresponding alcohol, such as:
xylitol, or be oxidized to 3-
hydroxyl-
pentanedioic acid.
In China, the main raw material(s) of Xylitol produced by wood sugar, has been non-caloric sweetener by multiple state approval.
(1) technical process:
Raw materials pretreatment →
picklinghydrolysis → filter → decolouring → concentrated →
ion-exchangepurification → crystallization →
centrifugation→ drying → finished product
(2) key point for process
1. the top process of corn cob raw material select purchase then inclusion-free, without going mouldy, dry at 12.18 below ﹪ of free from dust, moisture content
corn cob.
Screening Treatment: by screening, selection by winnowing, improves raw materials quality with the impurity eliminated in raw material.The corn cob of Han Shui Liang≤12.18% is used
pulverizerbe crushed to Li Jing≤5mm.
dilute sulphuric acidaqueous solution pre-treatment: the raw material pulverized is dropped in fermentation vat and add dilute acid soln immersion, the most applicable corn cob.The most part carrying out pushing up process is: water temperature 80'C. time 60min, with remove colloid,
pectin,
ash contentdeng. the complete China of pre-treatment, bleeds off waste water, and corn cob granule is selected into
hydrolysispot. be 120 ° of C by diluted acid ratio water pretreatment < temperature) not only temperature is low, but also raw sugar loss is lacked.
2.
picklinghydrolysis is at sulfuric acid concentration 15-20g/L; Be hydrolyzed under the condition of temperature 100-105C.
The improvement that xylose production process is not large for many years, current production technique is roughly as follows: add in hydrolysis kettle by corn cob, add a certain amount of sulfuric acid, be hydrolyzed boiling, then hydrolyzed solution is added the neutralization of a certain amount of calcium hydroxide, part of sulfuric acid is neutralized and precipitates, some sulfate radical is deposited in aqueous, cannot remove, again through anionite-exchange resin, pass through replacement(metathesis)reaction, sulfate radical in solution is adsorbed by anionite-exchange resin, through liquid caustic soda, sulfate radical is cemented out again, discharge opeing is to sewage work, through sewage disposal multiple-stage treatment, ability qualified discharge, due to the high saltiness of sulfate radical, sewage disposal difficulty is larger, processing costs remains high, a difficult problem and the bottleneck of the development of puzzlement manufacturing enterprise for many years.
Summary of the invention
The invention provides the xylose process of a kind of sulfate radical circulation, the deficiency of existing technique can be solved completely, and the scale production that can have high input, make enterprise obtain tremendous development, wide market, have a high potential.
The invention provides the xylose process of a kind of sulfate radical circulation, its processing step is as follows:
(1) take sulfuric acid as catalyzer, corn cob is joined in hydrolysis kettle the boiling that is hydrolyzed, xylose hydrolysis fluid, directly by electrodialyzer, by Bipolar Membrane enrichment sulfate ion, obtains wood sugar hydrating solution after removing sulfate radical;
(2) pregnant solution obtained after Bipolar Membrane enrichment in step (1) is driven in hydrolysis kettle by the aqueous solution, recycles.
In described Bipolar Membrane enrichment process, under the effect of DC electric field, make sulfate radical and hydrogen ion do displacement simultaneously.
Described Bipolar Membrane is arranged in electrodialyzer, and electrodialyzer is provided with direct current at Bipolar Membrane two ends.
Described boiling temperature is 100 DEG C, and cooking time is not less than 5 hours.
Compared with prior art, original technological process of production is longer, carry out costly, generation sewage quantity is large, the sewage produced is difficult to qualified discharge, and the present new technological process of production is relatively simple, the recycling of sulfate radical, be beneficial to cyclic production and reduce large amount of sewage discharge, economic benefits.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with embodiment, the technical scheme in the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1:
The invention provides the xylose process of a kind of sulfate radical circulation, its processing step is as follows:
(1) take sulfuric acid as catalyzer, corn cob is joined in hydrolysis kettle the boiling that is hydrolyzed, xylose hydrolysis fluid, directly by electrodialyzer, by Bipolar Membrane enrichment sulfate ion, obtains wood sugar hydrating solution after removing sulfate radical;
(2) pregnant solution obtained after Bipolar Membrane enrichment in step (1) is driven in hydrolysis kettle by the aqueous solution, recycles.
In described Bipolar Membrane enrichment process, under the effect of DC electric field, make sulfate radical and hydrogen ion do displacement simultaneously.
Described Bipolar Membrane is arranged in electrodialyzer, and electrodialyzer is provided with direct current at Bipolar Membrane two ends.
Described boiling temperature is 100 DEG C, and cooking time is not less than 5 hours.
Xylose process provided by the invention, recycling of sulfate radical electrolytic solution greatly reduces sulfate radical usage quantity, and saving rate is more than 60%, and quantity of wastewater effluent reduces 40%, and economic benefit improves 30%, and the environmental protection cause for energy-saving and emission-reduction has made considerable contribution.
The foregoing is only one embodiment of the invention, do not limit the present invention, the technical scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, all drop in protection scope of the present invention.
Claims (4)
1. an xylose process for sulfate radical circulation, is characterized in that: its processing step is as follows:
(1) take sulfuric acid as catalyzer, corn cob is joined in hydrolysis kettle the boiling that is hydrolyzed, xylose hydrolysis fluid, directly by electrodialyzer, by Bipolar Membrane enrichment sulfate ion, obtains wood sugar hydrating solution after removing sulfate radical;
(2) pregnant solution obtained after Bipolar Membrane enrichment in step (1) is driven in hydrolysis kettle by the aqueous solution, recycles.
2. the xylose process of a kind of sulfate radical circulation according to claims 1, is characterized in that, in described Bipolar Membrane enrichment process, make sulfate radical and hydrogen ion do displacement under the effect of DC electric field simultaneously.
3. the xylose process of a kind of sulfate radical circulation according to claims 1, it is characterized in that, described Bipolar Membrane is arranged in electrodialyzer, and electrodialyzer is provided with direct current at Bipolar Membrane two ends.
4. the xylose process of a kind of sulfate radical circulation according to claims 1, it is characterized in that, described boiling temperature is 100 DEG C, and cooking time is not less than 5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510429418.9A CN105063249A (en) | 2015-07-21 | 2015-07-21 | Sulfate radical circulation xylose process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510429418.9A CN105063249A (en) | 2015-07-21 | 2015-07-21 | Sulfate radical circulation xylose process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105063249A true CN105063249A (en) | 2015-11-18 |
Family
ID=54492752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510429418.9A Pending CN105063249A (en) | 2015-07-21 | 2015-07-21 | Sulfate radical circulation xylose process |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1196641B1 (en) * | 1999-07-14 | 2003-11-19 | Danisco Sweeteners Oy | Preparation of chemical pulp and xylose, utilizing a direct acid hydrolysis on the pulp |
| CN101392009A (en) * | 2007-09-21 | 2009-03-25 | 山东龙力生物科技有限公司 | Novel production technique of xylose |
| CN101818216A (en) * | 2010-04-26 | 2010-09-01 | 安徽丰原发酵技术工程研究有限公司 | Method for refining corncob acid hydrolysis solution |
| CN102559944A (en) * | 2012-01-30 | 2012-07-11 | 黑龙江浩源生物科技有限公司 | Method for producing xylose |
-
2015
- 2015-07-21 CN CN201510429418.9A patent/CN105063249A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1196641B1 (en) * | 1999-07-14 | 2003-11-19 | Danisco Sweeteners Oy | Preparation of chemical pulp and xylose, utilizing a direct acid hydrolysis on the pulp |
| CN101392009A (en) * | 2007-09-21 | 2009-03-25 | 山东龙力生物科技有限公司 | Novel production technique of xylose |
| CN101818216A (en) * | 2010-04-26 | 2010-09-01 | 安徽丰原发酵技术工程研究有限公司 | Method for refining corncob acid hydrolysis solution |
| CN102559944A (en) * | 2012-01-30 | 2012-07-11 | 黑龙江浩源生物科技有限公司 | Method for producing xylose |
Non-Patent Citations (1)
| Title |
|---|
| 凌秀菊等: ""双极膜电渗析脱除硫酸过程性能的研究"", 《科技创业》 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151118 |