Preparation method and application of a filter tip additive

An additive and filter technology, which is applied in the field of filter additive preparation, can solve problems such as equipment corrosion, and achieve the effect of avoiding corrosion and remarkable effect

Active Publication Date: 2019-03-01
ZHENGZHOU TOBACCO RES INST OF CNTC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1669918A and Publication No. CN101648707A are all under high temperature conditions due to the use of alkali or acid, so the corrosion problem to equipment is serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put the tobacco rod raw material in an oven at 60°C and dry until the moisture content is below 5%, crush it to 20-40 mesh, weigh 10g of the powder and mix it with methanol aqueous solution (the concentration of methanol is 5%wt) according to the solid-liquid volume ratio of 1:15. Mix and transfer to a ball mill jar, add 1.0 g of HY molecular sieves (10% of the weight of the tobacco rod) and mix at room temperature for 5 hours at a ball mill speed of 300 rpm to obtain a feed solution. The feed liquid was transferred to a high-pressure reactor, and reacted at 100° C. and 5 MPa for 24 h under a nitrogen atmosphere. The reaction solution was cooled to room temperature and then transferred to a hydrothermal kettle for hydrothermal carbonization at 450 °C for 24 h. Filter, and soak the solid product in 10M NaOH solution at room temperature for 1 hour, filter, wash with deionized water until neutral, and obtain step-pore carbon material 1#. The specific surface area and pore...

Embodiment 2

[0026] Place the raw material of the tobacco stem in an oven at 80°C and dry until the moisture content is below 5%, crush it to 60-90 mesh, weigh 10g of the corresponding powder, and mix it with ethanol aqueous solution (ethanol concentration 8%wt) according to the solid-liquid volume ratio of 1:10 Mix and transfer to a ball mill tank, add 2.0 g of HZSM-5 molecular sieve (20% of the weight of the tobacco rod) and mix at room temperature for 4 hours at a ball mill speed of 400 rpm to obtain a feed solution. The feed liquid was transferred to an autoclave, and reacted at 150° C. and 12 MPa for 14 h under a nitrogen atmosphere. After the reaction solution was cooled to room temperature, it was transferred to a hydrothermal kettle, and hydrothermal carbonization was carried out at 500° C. for 10 h. Filter, and soak the solid product in 5M KOH solution at 40°C for 3 hours, filter, wash with deionized water until neutral, and obtain step-pore carbon material 2#. The corresponding ...

Embodiment 3

[0028] Put the tobacco rod raw material in an oven at 100°C and dry it until the moisture content is below 5%, crush it to 100-120 mesh, weigh 10g of the corresponding powder, and mix it with propanol aqueous solution (10%wt) according to the solid-liquid volume ratio of 1:5. Mix and transfer to a ball mill jar, add SO 3 0.5 g of H-MCM-41 mesoporous material (5% of the weight of the tobacco rod) was mixed at room temperature for 2 hours at a ball milling speed of 200 rpm to obtain a feed solution. The feed liquid was transferred to an autoclave, and reacted at 200° C. and 5 MPa for 1 h under a nitrogen atmosphere. The reaction solution was cooled to room temperature and then transferred to a hydrothermal kettle for hydrothermal carbonization at 550 °C for 10 h. Filter, and soak the solid product in 1M NaOH solution at 60°C for 5 hours, filter, wash with deionized water until neutral, and obtain step-pore carbon material 3#. The corresponding specific surface area and pore vo...

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Abstract

The invention discloses a preparation method of a filter tip additive. The preparation method is characterized by being a method using tobacco stems as a raw material to prepare a cascade pore carbon material and specifically including: using the tobacco stems as a raw material, partly hydrolyzing in an alcohol-water solution environment under action of solid acid, heating for carbonization, and performing alkali washing and water washing to obtain the cascade pore carbon material. The cascade pore carbon material prepared by the method has certain distribution within ranges of micropores (small than 2nm), mesopores (2-50nm) and macropores (greater than 50nm and is more suitable for adsorption of cigarette tar wide in particle size distribution; by adding the cascade pore carbon material prepared by the method into a cigarette filter tip, effect of lowering mainstream smoke tar is remarkable, and lowering rate is higher than 20%. The preparation method has the advantages that organic acid generated in the process of catalyzing cellulose for hydrolysis by the solid acid reacts with alcohol to generate ester, and corrosion of the organic acid to a reactor can be avoided.

Description

technical field [0001] The invention relates to a preparation method and application of a filter additive, in particular to a method for preparing a high-porosity graded-pore activated carbon material by carbonizing tobacco rods after pulverization and catalytic hydrolysis. The material can be added to cigarette filters, and has a remarkable effect on reducing smoke tar. Background technique [0002] my country is a big tobacco country in the world, and its planting area, total output, cigarette output and sales volume all rank first in the world. A large amount of waste will inevitably be generated in the tobacco leaf and processing process. According to statistics, the tobacco stem produced in 2015 alone reached 1.163×10 6 Ton. Due to the relatively poor availability of tobacco stalks, most of them are disposed of by landfill or incineration, and the comprehensive utilization rate is extremely low, which not only causes environmental pollution, but also wastes a lot of e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20C01B32/05B01J20/30B01D53/02
CPCB01D53/02B01J20/20B01J2220/4825C01P2006/12C01P2006/14C01P2006/16
Inventor 王金棒程多福高运谦孟庆华高健汪志波邓楠邱纪青刘亚丽洪群业郑路张仕华冯伟华郑新章
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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