CN1261440C - Modified silica-gel preparation process and use thereof - Google Patents
Modified silica-gel preparation process and use thereof Download PDFInfo
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- CN1261440C CN1261440C CN 02114040 CN02114040A CN1261440C CN 1261440 C CN1261440 C CN 1261440C CN 02114040 CN02114040 CN 02114040 CN 02114040 A CN02114040 A CN 02114040A CN 1261440 C CN1261440 C CN 1261440C
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- gel
- modified silica
- acetone
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- silica
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- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
Abstract
The present invention relates to the surface structure characteristics of a product obtained by the reaction of a silica gel and aminopropyl-3 triethoxy silane in an acetone solution, a preparation method for the product and an application for the product used as a composite filter-tip additive agent in a cigarette. The surface-finished silica gel of the present invention can be used for preparing composite cigarettes with filter tips, and particularly the product obtained in an acetone medium can effectively lower nicotine contents, lower tar in mainstream smoke by 2 to 3 mg and lower benzo <a> perylene by more than 30 %.
Description
Technical field
The present invention relates to the sorbent material of the vesicular structure of additive in a kind of cigarette, its preparation method and as the application of the composite filter tip additive in the cigarette.
Background technology
Obtain the improvement that the cigarette pneumatolytic is grouped into by improving filter tip, become the object that many tobacco researchers are endeavoured to study; Filter tip mainly is to be undertaken improved by the methods such as processing of the selection of composite filter, filter material, filter material.Wherein composite filter mainly be will have the additive of certain absorption property disperse (or be clipped in form between two sections filter materials three sections compound) in suitable filter material, and then carry out itself and other filter material compound.The additive that can use is a lot, sorbent material such as gac, sepiolite, montmorillonite, medical stone, silica gel, hydroxylapatite, negatively charged ion and Zeo-karb etc. that a wherein very big class is some vesicular structures.Relatively be suitable for the purpose that this flue gas improves though have the weak anion resin of vesicular structure, but may be subjected to the cause of the little or material retained thermal desorption of exchange capacity, the same with carbon and porous material, along with the carrying out of smoking, their efficient is also fading away.
Summary of the invention
Purpose of the present invention aims to provide a kind ofly can improve smoke components effectively, removes typical carcinogens---benzopyrene in the flue gas effectively, removes a kind of modified silica-gel of objectionable impurities.
Another object of the present invention aims to provide the preparation method of above-mentioned modified silica-gel.
A further object of the invention is with the application of above-mentioned modified silica-gel as the composite filter tip additive in the cigarette.
The present invention is H with silica gel and its chemical molecular formula of 3-aminopropyl triethoxysilane
2NCH
2CH
2CH
2-Si (OC
2H
5)
3, the reaction products therefrom is that structural formula is (I), (II) mixture in acetone soln, its surface texture featur is respectively:
X represents that the group that connects is Si, H or C
2H
5O-.
Its carbon content of described modified silica-gel is 6.14%, and nitrogen content is 1.82%, and on the whole, its surface is weakly alkaline, and has certain polarity and wetting ability.
When three oxyethyl groups on the KH550 during all with the lip-deep hydroxyl reaction of silica gel, X only is Si in the surface tissue that obtains, in fact know by calculating, their reaction ratio is between 2～3, just the hydroxyl on 2 to 3 oxyethyl groups and silica gel surface reacts, a remaining oxyethyl group part continues to be retained on the chain of KH550 with the form of oxyethyl group, also has sub-fraction to be replaced by H-.
Preparation method of the present invention is:
(1) with 400ml-600ml 3-aminopropyl triethoxysilane, promptly KH550 and acetone thorough mixing left standstill 5-30 minute;
(2) get 2 kilograms in particle diameter 60-80 order silica gel, with above-mentioned reaction solution thorough mixing, mixed solution at room temperature left standstill 12-48 hour, or sway;
(3) after reaction finishes, filter and dry, the back in 90-100 ℃ dry 24-48 hour down; After the collection, standby.
Described acetone is 4500-6000ml.
Product of the present invention can be used the additive granules as composite filter tip, can reduce the objectionable impurities in the flue gas effectively.
Tar in the cigarette, nicotine all are harmful materials, in the main flume of now having confirmed about 44 kinds of carcinogenic compositions are arranged, and a wherein most important class is polycyclic aromatic hydrocarbons (comprising benzo [a] pyrene, benzanthrene etc.).Be that representative test product of the present invention in the polycyclic aromatic hydrocarbons is to the influence of main flume with nicotine, tar and with benzo [a] pyrene below.
Silica gel-KH550 reaction product (1#) is applied in the composite filter tip of cigarette, and wherein contrast is the common filter tip cigarette that does not add any additives, and tow is identical with tow in the composite filter tip in the filter tip, result such as table 1:
| Sample | Moisture (mg/vig) | Nicotine (mg/cig) | Tar (mg/cig) | Benzo [a] pyrene (ng/cig) |
| Contrast 1# | 1.87 1.76 | 0.85 0.80 | 14.30 12.28 | 9.25 7.0 |
The above results shows, product of the present invention can apply to the production of composite filter tip cigarette through the silica gel of finishing, particularly in medium-acetone, obtain product, can reduce nicotine content effectively, the tar in the main flume can be reduced 2-3mg, benzo [a] pyrene can reduce more than 30%.
In addition, adopt different-grain diameter silica gel reaction composite filter tip cigarette also different, the results are shown in Table 2 the influence of nicotine in the main flume and tar content:
| Particle diameter (order) | Moisture content (mg/cig) | Nicotine (mg/cig) | Tar ((mg/cig) | Remarks (addition mg/cig) |
| Contrast 100 60-80 40-60 20-40 | 1.85 1.76 1.62 1.67 1.70 | 0.86 0.86 0.80 0.82 0.83 | 14.31 13.37 12.28 12.63 12.92 | 0.0 31.3 30.9 31.8 49.0 |
As can be seen, excessive or mistake small particle size all is unfavorable for reducing burnt cigarette amount, and experiment is final determines that the 60-80 order is best.
Above composite filter tip cigarette is through after reaching 6 months placement, filter tip burnt effect falls, do not change, and also have in various degree improvement, its test result is than test result is good first, 60-80 purpose modified silica-gel wherein, tar content drops in the 12mg.
Embodiment:
(1) with 500ml 3-aminopropyl triethoxysilane, promptly KH550 and 5000ml acetone carry out thorough mixing in 20 liters plastic tank, leave standstill 30 minutes;
(2) get 2 kilograms in particle diameter 60-80 order silica gel, place 20 liters of plastic tanks, with above-mentioned reaction solution thorough mixing, mixed solution at room temperature left standstill 48 hours, or sway;
(3) after reaction finishes, filter and dry, the back in 90-100 ℃ dry 48 hours down;
(4) after the collection, it is standby to put into sample sack;
(5) the gained sample is made composite tip stick, refabrication becomes cigarette with filter tip.
(6) gained cigarette is carried out the test of relevant item after overbalance.
Claims (6)
1, a kind of modified silica-gel is characterized in that: silica gel and 3-aminopropyl triethoxysilane chemical molecular formula are H
2NCH
2CH
2CH
2-Si (OC
2H
5)
3, the reaction products therefrom is that structural formula is (I), (II) mixture in acetone soln, its surface texture featur is respectively:
X represents that the group that connects is Si, H or C
2H
5O-.
2,1 described a kind of modified silica-gel as requested is characterized in that its carbon content is 6.14%, and nitrogen content is 1.82%, and on the whole, its surface is weakly alkaline, and has certain polarity and wetting ability.
3, a kind of modified silica-gel preparation method according to claim 1 is:
(1), left standstill 5-30 minute with 400ml-600ml 3-aminopropyl triethoxysilane and acetone thorough mixing;
(2) get 2 kilograms in particle diameter 60-80 order silica gel, with above-mentioned reaction solution thorough mixing, mixed solution at room temperature left standstill 12-48 hour, or sway;
(3) after reaction finishes, filter and dry, the back in 90-100 ℃ dry 24-48 hour down; After the collection, standby.
4, the preparation method of a kind of modified silica-gel according to claim 3 is characterized in that described acetone is 4500-6000ml.
5, according to the preparation method of claim 3 or 4 described a kind of modified silica-gels, it is characterized in that 500ml 3-aminopropyl triethoxysilane and 5000ml acetone are carried out thorough mixing in 20 liters plastic tank, left standstill 30 minutes.
6, the application of the described a kind of modified silica-gel of claim 1 is as the additive granules of composite filter tip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02114040 CN1261440C (en) | 2002-04-11 | 2002-04-11 | Modified silica-gel preparation process and use thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02114040 CN1261440C (en) | 2002-04-11 | 2002-04-11 | Modified silica-gel preparation process and use thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1450070A CN1450070A (en) | 2003-10-22 |
| CN1261440C true CN1261440C (en) | 2006-06-28 |
Family
ID=28680603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02114040 Expired - Lifetime CN1261440C (en) | 2002-04-11 | 2002-04-11 | Modified silica-gel preparation process and use thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1261440C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101116539B (en) * | 2007-08-21 | 2011-02-16 | 中国烟草总公司郑州烟草研究院 | Tobacco additive agent for selectively reducing volatility carbonyl compound in the cigarette smoke and method for preparing the same and application thereof |
| CN101194757B (en) * | 2007-12-21 | 2011-11-09 | 湖南中烟工业有限责任公司 | Cigarette filter-tip additive agent, preparation and application method thereof |
| CN102920021B (en) * | 2012-11-16 | 2013-10-23 | 湖南中烟工业有限责任公司 | Additive capable of reducing phenol content in main stream smoke, as well as preparation and application methods of additive |
| CN105533804A (en) * | 2016-02-19 | 2016-05-04 | 福建中烟工业有限责任公司 | Modified silica gel particles capable of reducing aldehyde substances in cigarette smoke and preparation method thereof |
-
2002
- 2002-04-11 CN CN 02114040 patent/CN1261440C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1450070A (en) | 2003-10-22 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA TOBACCO HUNAN INDUSTRIAL CORPORATION Free format text: FORMER NAME OR ADDRESS: CHANGSHA CIGARETTE FACTORY |
|
| CP03 | Change of name, title or address |
Address after: 410001 Mars Development Zone, Hunan, Changsha seven Patentee after: China Tobacco Hunan Industrial Corporation Address before: 410014 No. 346 labour East Road, Changsha, Hunan Patentee before: Changsha Cigarette Factory |
|
| C56 | Change in the name or address of the patentee |
Owner name: HUNAN ZHONGYAN INDUSTRY CO., LTD. Free format text: FORMER NAME OR ADDRESS: CHINA TOBACCO HUNAN INDUSTRIAL CORPORATION |
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| CP03 | Change of name, title or address |
Address after: Wanjiali Road, Yuhua District of Hunan province Changsha three No. 188 Patentee after: China Tobacco Hunan Industrial Co., Ltd. Address before: Seven pieces of Mars Development Zone, Hunan, Changsha Patentee before: China Tobacco Hunan Industrial Corporation |
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| CX01 | Expiry of patent term |
Granted publication date: 20060628 |
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| CX01 | Expiry of patent term |