CN102029193A - Active carbon serving as catalyst carrier and treatment method and application thereof - Google Patents
Active carbon serving as catalyst carrier and treatment method and application thereof Download PDFInfo
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- CN102029193A CN102029193A CN2009101910639A CN200910191063A CN102029193A CN 102029193 A CN102029193 A CN 102029193A CN 2009101910639 A CN2009101910639 A CN 2009101910639A CN 200910191063 A CN200910191063 A CN 200910191063A CN 102029193 A CN102029193 A CN 102029193A
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Abstract
The invention relates to an active carbon serving as a catalyst carrier and a treatment method and application thereof. After being subjected to heating and dipping treatment in hydrogen peroxide, the specific surface area of the active carbon is 900 to 1,300m<2>/g and the mesopore distribution ratio is 20 to 30 percent. The treatment method has short treatment time and high speed, is convenient to operate and is easy to realize. The micropore size distribution and the micropore surface charge reorganization of the treated active carbon adsorptive catalyst are well improved. The active carbon treated by the method is suitable for serving as the carrier of a synthesis catalyst for the industrial production of vinyl acetate.
Description
Technical field
The present invention relates to a kind of active carbon, particularly as catalyst carrier active carbon and processing method and application.
Background technology
Active carbon is a kind of function admirable, broad-spectrum adsorbent.It has the double grading of physical absorption and chemisorbed, can adsorb the various materials in gas phase, the liquid phase selectively.The industrial utilization himself activates physics, chemisorbed characteristic that the back is possessed, and catalyst is adsorbed its surface of appendix, is prepared into after the drying and produces required catalyst, mainly prepares palladium carbon catalyst, ruthenium Pd/carbon catalyst, rhodium Pd/carbon catalyst, platinum carbon catalyst etc.
At present, the preparation method of known active carbon has two big process routes, i.e. chemical activation method (cry not only medicine activation method) and physical activation method (but also being the gas activation method).Chemical activation method is to utilize raw material to handle as acid, alkali or salt through different chemicals, carries out hot-working then at a certain temperature, thereby produces active carbon.During the resulting activated carbon product of this method has on the microstructure, big space prosperity, product is specially adapted to the big molecule decolorizing and refining of liquid phase etc. to the characteristics of raw material yield higher (about 70%).Physical activation method is to utilize carbon at high temperature to control effectively to burn with multiple gases such as steam, carbon dioxide, air or flue gas etc. to lose, thereby produces active carbon.This method gained activated carbon product on microstructure micropore and little in the space prosperity, product is mainly used in gas phase and little molecule liquid phase separation and exquisiteness etc. to the yield of raw material lower (about 40%).
At present, known Properties of Activated Carbon mainly is meant its absorption property, and absorption property has direct relation with its specific area.Therefore in the industry cycle generally use its specific area index value to be used as its absorption property index, generally big more its adsorption capacity of its specific area is good more, shows its superior performance.And directly adopt commercial active carbon in the production application at present as catalyzer for synthesizing vinyl acetate, though can satisfy existing general industry production requirement, but its catalytic activity limits to some extent, and service life is shorter, and the economic benefit of bringing in commercial Application is not remarkable.
Summary of the invention
The purpose of this invention is to provide a kind of active carbon of using as catalyst carrier.Its catalytic activity height, long service life.
Another object of the present invention is to provide the processing method of above-mentioned active carbon.This processing method is simple, and it is respond well that the carrier inside micropore size that obtains distributes and the micropore surface electric charge is reformed, and the mesopore ratio is suitable.
The 3rd purpose of the present invention is to provide the new purposes of above-mentioned active carbon.
The object of the present invention is achieved like this: a kind of active carbon of making catalyst carrier is characterized in that: it is that to obtain specific area after the hydrogen peroxide impregnation process be 900～1300m
2/ g, mesopore are distributed as 20%～30% active carbon.
Preferred 1000～the 1200m of above-mentioned active carbon specific area
2/ g; Above-mentioned mesopore aperture is 30～60nm.
Another object of the present invention is achieved in that a kind of processing method of making the active carbon of catalyst carrier, it is characterized in that: described active carbon is heated to 50 ℃～100 ℃ through hydrogen peroxide, preferred 70 ℃～100 ℃, most preferably 80 ℃～95 ℃, impregnation process at least 10 minutes, preferred 1.0hr～5.0hr, most preferably 1.5hr～2.5hr; Washing separates drying and obtains product to neutral then.
In the above-mentioned processing method, the mass concentration scope of hydrogen peroxide is 5.0%～30.0%, is preferably 10.0%～30.0%, and optimum is 20.0%～30.0%.
In the above-mentioned processing method, the weight percent content of active carbon and hydrogen peroxide is an active carbon 10%～50%, hydrogen peroxide 50%～90%; Be preferably active carbon 15%～35%, hydrogen peroxide 65%～85%.
In the above-mentioned processing method, drying mode is oven drying or microwave drying, preferred microwave drying.
The 3rd purpose of the present invention is achieved in that the active carbon that adopts above-mentioned processing method to obtain, and its specific area is 900～1300m
2/ g, mesopore are distributed as 20%～30% active carbon, are suitable for doing the carrier of the employed catalyst of suitability for industrialized production vinyl acetate especially.
The present invention has following beneficial effect:
1, active carbon of the present invention is to get through the hydrogen peroxide impregnation process, and the micropore size distribution and the reformation of micropore surface electric charge of this charcoal absorption catalyst are good; The active carbon specific surface that obtains is at 900～1300m
2/ g, the best can be at 1000～1200m
2/ g; The mesopore ratio in 30～60nm aperture rises to 20%～30%.
2, processing method of the present invention, the processing time is short, speed is fast, only is 10min～5.0hr, and is easy to operate, is easy to realize.
3, the active carbon after handling through the method for the invention is suitable for preparing the carrier of the synthetic catalyst of suitability for industrialized production vinyl acetate especially.Experiment showed, and adopt the method for the invention to handle the active carbon that obtains, the catalyst of making, under the same conditions, its catalytic activity improves 2%～15%, and promptly under identical raw material preparation and process conditions, products obtained therefrom output increases by 2%～15%; Catalyst prolongs 4%～18% service life simultaneously, has saved production cost, and this economic benefit that can bring in industrial mass production is very huge.
The specific embodiment
Below by embodiment the present invention is specifically described; be necessary to be pointed out that at this; following examples only are used for the present invention is further detailed; can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field can make some nonessential improvement and adjustment to the present invention according to the foregoing invention content.
Embodiment 1
In the reactor of reflux condenser is housed, feed nitrogen, add specific area and be about 800m
2100 parts of the active carbons of/g (volume fraction) are warming up to 75 ± 2 ℃, add 150 parts in hydrogen peroxide (volume fraction) rapidly, and reflow treatment 1.0hr is extremely neutral through pure water washing pH value, isolated by filtration, the dry product that gets.
Embodiment 2-6: listed relevant technological parameter carries out in the according to the form below, and reactions steps is identical with embodiment 1.
The catalyst carrier of method for preparing, and the commercially available untreated absorbent charcoal carrier of buying, use the same zinc acetate solution that is equipped with under identical immersion condition, to flood, under identical condition, investigate its catalytic activity and life-span, result such as following table behind the filtration drying respectively:
The active lifetime comparison sheet of different catalysts
| The sample title | Catalytic activity improves (%) | Life-span (hr/hr, %) |
| Be untreated | 100 | ?100 |
| Embodiment 1 | 115 | ?118 |
| Embodiment 2 | 108 | ?104 |
| Embodiment 3 | 105 | ?112 |
| Embodiment 4 | 109 | ?114 |
| Embodiment 5 | 107 | ?108 |
| Embodiment 6 | 102 | ?106 |
Activity of such catalysts improve be by with untreated active carbon gained relatively.Concrete data are under identical experiment condition, and the space-time yield data of employed catalyst relatively get.Life-span is to get by the catalysqt deactivation time ratio.
Conclusion: can find out the absorbent charcoal carrier after handling through this kind method, the catalyzer for synthesizing vinyl acetate of making from the data of last table, under identical process conditions, than the catalyst that untreated active carbon is made, its activity is significantly improved, and prolong service life relatively.
Verify through production practices: the catalyst activity that the active carbon after the present invention handles is made has improved 2%～15%, promptly under identical raw material preparation and working condition, in unit interval, can produce 2%～15% product, catalyst has prolonged 4%～18% service life simultaneously more.This industrial easily up to ten thousand tons output and with " hundred days " be service life cycle unit calculate, identical raw materials for production input can create more products and be worth, its overall economic efficiency is very huge.
Claims (12)
1. active carbon of making catalyst carrier is characterized in that: it is that to obtain specific area after the hydrogen peroxide impregnation process be 900～1300m
2/ g, mesopore are distributed as 20%～30% active carbon.
2. active carbon as claimed in claim 1 is characterized in that: the specific area of active carbon is 1000～1200m
2/ g; The mesopore aperture is 30～60nm.
3. active carbon as claimed in claim 1 or 2 is characterized in that: active carbon is heated to 50 ℃～100 ℃, impregnation process at least 10 minutes through hydrogen peroxide; Washing separates drying and obtains product to neutral then.
4. processing method of making the active carbon of catalyst carrier is characterized in that: described active carbon is heated to 50 ℃～100 ℃, impregnation process at least 10 minutes through hydrogen peroxide; Washing separates drying and obtains product to neutral then.
5. the processing method of making the active carbon of catalyst carrier as claimed in claim 4 is characterized in that: the mass concentration scope of described hydrogen peroxide is 5.0%～30.0%; The weight percent content of active carbon and hydrogen peroxide is an active carbon 10%～50%, hydrogen peroxide 50%～90%.
6. the processing method of making the active carbon of catalyst carrier as claimed in claim 5 is characterized in that: the mass concentration scope of described hydrogen peroxide is 10.0%～30.0%; The weight percent content of active carbon and hydrogen peroxide is an active carbon 15%～35%, hydrogen peroxide 65%～85%.
7. the processing method of making the active carbon of catalyst carrier as claimed in claim 6 is characterized in that: the mass concentration scope of described hydrogen peroxide is 20.0%～30.0%.
8. as each described processing method of making the active carbon of catalyst carrier of claim 4 to 7, it is characterized in that: described active carbon is heated to 70 ℃～100 ℃ through hydrogen peroxide; Impregnation process 1.0hr～5.0hr.
9. the processing method of making the active carbon of catalyst carrier as claimed in claim 8 is characterized in that: described active carbon is heated to 80 ℃～95 ℃ through hydrogen peroxide; Impregnation process 1.5hr～2.5hr.
10. as each described processing method of making the active carbon of catalyst carrier of claim 4 to 7, it is characterized in that: drying mode is oven drying or microwave drying.
11. the processing method of making the active carbon of catalyst carrier as claimed in claim 8 is characterized in that: drying mode is oven drying or microwave drying.
12., it is characterized in that: described active carbon specific area 900～1300m as claim 1-11 Application of Brand Active Carbon as described in each
2/ g; The mesopore ratio in 30～60nm aperture is 20%～30%, is suitable for producing the carrier of the synthetic catalyst of vinyl acetate.
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| CN2009101910639A CN102029193A (en) | 2009-09-30 | 2009-09-30 | Active carbon serving as catalyst carrier and treatment method and application thereof |
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| CN2009101910639A CN102029193A (en) | 2009-09-30 | 2009-09-30 | Active carbon serving as catalyst carrier and treatment method and application thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104549238A (en) * | 2013-10-28 | 2015-04-29 | 中国石油化工股份有限公司 | Catalyst for hydrorefining crude terephthalic acid and preparation method of catalyst |
| CN105460932A (en) * | 2015-12-04 | 2016-04-06 | 北海和荣活性炭科技有限责任公司 | Method for purifying cocoanut shell activated carbon |
| CN106672969A (en) * | 2016-12-22 | 2017-05-17 | 桂东县湘浙活性炭有限公司 | Active carbon rinsing method |
| CN107308926A (en) * | 2017-06-02 | 2017-11-03 | 昆明理工大学 | A kind of method of waste active carbon in microwave hydrogen peroxide combining and regenerating aspirin production process |
| CN110562978A (en) * | 2019-09-20 | 2019-12-13 | 安徽大学 | Method for modifying active carbon electrode material by composite aerobic acid hydrothermal method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1903435A (en) * | 2006-07-31 | 2007-01-31 | 中国石油化工集团公司 | Catalyst used for synthesis of vinyl acetate and its prepn. method |
-
2009
- 2009-09-30 CN CN2009101910639A patent/CN102029193A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1903435A (en) * | 2006-07-31 | 2007-01-31 | 中国石油化工集团公司 | Catalyst used for synthesis of vinyl acetate and its prepn. method |
Non-Patent Citations (1)
| Title |
|---|
| 侯春燕等: "改性活性炭合成醋酸乙烯固定床催化剂的实验研究", 《大连海事大学学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104549238A (en) * | 2013-10-28 | 2015-04-29 | 中国石油化工股份有限公司 | Catalyst for hydrorefining crude terephthalic acid and preparation method of catalyst |
| CN105460932A (en) * | 2015-12-04 | 2016-04-06 | 北海和荣活性炭科技有限责任公司 | Method for purifying cocoanut shell activated carbon |
| CN106672969A (en) * | 2016-12-22 | 2017-05-17 | 桂东县湘浙活性炭有限公司 | Active carbon rinsing method |
| CN107308926A (en) * | 2017-06-02 | 2017-11-03 | 昆明理工大学 | A kind of method of waste active carbon in microwave hydrogen peroxide combining and regenerating aspirin production process |
| CN110562978A (en) * | 2019-09-20 | 2019-12-13 | 安徽大学 | Method for modifying active carbon electrode material by composite aerobic acid hydrothermal method |
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Application publication date: 20110427 |