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Preparation method and application of high-porosity stepped hole carbon material cigarette filter tip additive

A technology of carbon materials and stepped pores, which is applied in the preparation/purification, application, and e-liquid filter elements of carbon, which can solve the problems of equipment corrosion and low yield, and achieve the effect of promoting carbonization, reducing tar content, and remarkable effects

Active Publication Date: 2017-09-01
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 Because the use of alkali or acid is under high temperature conditions, the corrosion problem of equipment is serious, and the yield is low

Method used

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  • Preparation method and application of high-porosity stepped hole carbon material cigarette filter tip additive

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 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 10 g of the sample, and mix it with methanol aqueous solution (methanol concentration 5%wt) according to the solid-liquid volume ratio of 1:15 ) were mixed and transferred to a ball mill jar, 1.0 g of HY molecular sieve (10% of the weight of the tobacco rod) was added and mixed at room temperature for 5 h at a ball mill speed of 300 rpm to obtain a uniform feed liquid. The feed liquid and the agate beads were separated and transferred to a high-pressure reactor, and reacted at 100 °C and 5 MPa for 24 h under a nitrogen atmosphere. After the reaction liquid was cooled to room temperature, it was filtered, and the solid and liquid were separated to obtain the filter residue and filtrate, which were set aside. 1) After the filter residue was washed and dried with water, 50 mg of mixed metal salts (25 mg of cobalt nitrate and 25 mg of lanthanum n...

Embodiment 2

[0027] Put the tobacco rod raw material in an oven at 80°C and dry until the moisture content is below 5%, crush it to 60-90 mesh, weigh 10 g of the sample, 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 jar, add 2.0 g of HZSM-5 molecular sieve (20% of the weight of the tobacco rod) and mix at room temperature for 4 h at a ball mill speed of 400 rpm to obtain a uniform feed liquid. The feed liquid and the agate beads were separated and transferred to a high-pressure reactor, and reacted at 120 °C and 10 MPa for 12 h under a nitrogen atmosphere. After the reaction liquid was cooled to room temperature, it was filtered, and the solid and liquid were separated to obtain the filtrate and filter residue, which were set aside. 1) After the filter residue was washed and dried, 0.5 g of mixed metal salts (cobalt nitrate and cerium sulfate, 0.48 g and 0.02 g, respectively) were loa...

Embodiment 3

[0029]Place the raw material of the tobacco stem in an oven at 100°C and dry until the moisture content is below 5%, crush it to 100-120 mesh, weigh 10 g of the sample, and mix it with propanol aqueous solution (propanol concentration 10% according to the solid-liquid volume ratio 1:5) wt) were mixed and transferred to a ball mill, adding 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 h at a ball milling speed of 200 rpm to obtain a uniform material liquid. The feed liquid was separated from the agate beads, and then transferred to a high-pressure reactor, and reacted at 150° C. and 15 MPa for 8 hours under a nitrogen atmosphere. After the reaction liquid was cooled to room temperature, it was filtered, and the solid and liquid were separated to obtain the filtrate and filter residue, which were set aside. 1) After the filter residue was washed and dried, 0.1 g of mixed metal salts (cobalt nitrate and niobi...

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Abstract

The invention relates to a preparation method of a high-porosity stepped hole carbon material cigarette filter tip additive. The preparation method is characterized by comprising the following steps: performing partial hydrolysis on tobacco stems under the action of solid acids, performing solid-liquid separation, loading mixed metal oxide on residues and carbonizing to obtain a metal oxide carbon material; adding the metal oxide carbon material into a filtrate, performing hydrothermal carbonization and then pickling and washing to obtain the high-porosity stepped hole carbon material cigarette filter tip additive. As the material is added into a cigarette filter tip, the effect of reducing the benzo(a)pyrene and tar in cigarette mainstream smoke is significant. The preparation method provided by the invention has the advantage that organic acids generated in the solid acid catalyzed cellulose hydrolysis process react with alcohols to form esters, so that the corrosion problem of the organic acids to a reactor can be solved. Wet-process dipping hydrolysis filter residues are conducive to the dispersion of metal components; metal-supported filter residue carbon can further promote the carbonization of hydrolysates in the filtrate, so that the yield of carbon products is increased.

Description

technical field [0001] The invention relates to a method for preparing a high-porosity graded-pore carbon material cigarette filter additive, in particular a method for preparing a high-porosity graded-pore carbon material by catalyzing hydrolysis carbonization after crushing tobacco rods. The material is added to the cigarette filter tip, and has a remarkable effect of reducing benzo[a]pyrene and tar in cigarette smoke. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05A24D3/16
CPCA24D3/163C01P2006/14C01P2006/17
Inventor 王金棒程多福高运谦邱纪青高健汪志波邓楠孟庆华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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