阅读说明：本技术 一种烟用滴丸冷却液的净化方法 (Purification method of dropping pill cooling liquid for cigarettes ) 是由 苗丽坤 陈�胜 孙炜炜 于 2019-11-14 设计创作，主要内容包括：本发明的一种烟用滴丸冷却液的净化方法,该种方法通过多段、多次的吸附过滤,逐步实现对浑浊冷却液中的杂质进行去除,去除效果彻底；通过活性炭以及分子筛多孔颗粒可以有效去除冷却液中的极性和非极性物质,同时对细小尘渣也具有较强的选择性和吸附性；通过吸水性树脂可以有效去除冷却液中的水分,降低或者避免冷却液乳化的情况发生；通过改性水滑石不仅能够对冷却液进一步的吸附净化处理,同时也可以进行脱色处理。(According to the purification method of the dropping pill cooling liquid for the cigarettes, impurities in turbid cooling liquid are gradually removed through multi-section and multi-time adsorption filtration, and the removal effect is thorough; polar and non-polar substances in the cooling liquid can be effectively removed through the active carbon and the porous particles of the molecular sieve, and meanwhile, the active carbon and the porous particles of the molecular sieve have strong selectivity and adsorbability on fine dust residues; the water in the cooling liquid can be effectively removed through the water-absorbent resin, so that the condition of emulsifying the cooling liquid is reduced or avoided; the modified hydrotalcite can not only further adsorb and purify the cooling liquid, but also carry out decoloration treatment.)

1. A purification method of dropping pill cooling liquid for cigarettes is characterized in that: the method comprises the following steps:

s1: filtering the turbid cooling liquid for the first time to remove large-particle impurities;

s2: heating the turbid cooling liquid subjected to primary filtration, adding concentrated sulfuric acid, continuously stirring, standing for layering, and removing lower-layer precipitated liquid to obtain upper-layer cooling liquid;

s3: adding adsorbent into the upper layer cooling liquid, stirring uniformly, and standing for 3-4 d;

s4: carrying out secondary filtration on the cooling liquid with the adsorption adsorbent to obtain yellow cooling liquid;

s5: adding a purifying agent into the yellow cooling liquid, continuously stirring, standing, and filtering for three times to obtain colorless clean cooling liquid.

2. The purification method of the dropping pill cooling liquid for the cigarettes as claimed in claim 1, wherein: the primary filtration in S1 was performed by using a plate and frame filter.

3. The purification method of the dropping pill cooling liquid for the cigarettes as claimed in claim 1, wherein: the heating temperature range in S2 is 60-80 ℃.

4. The purification method of the dropping pill cooling liquid for the cigarettes as claimed in claim 1, wherein: the volume ratio of the concentrated sulfuric acid to the turbid cooling liquid in the S2 is 1: 8-12.

5. The purification method of the dropping pill cooling liquid for the cigarettes as claimed in claim 1, wherein: the adsorbent in S3 comprises 8-12 parts of activated carbon, 25-35 parts of water-absorbent resin and 17-23 parts of molecular sieve porous particles by mass.

6. The purification method of the dropping pill cooling liquid for the cigarettes as claimed in claim 1, wherein: the secondary filtering step in S4 is as follows: coarse filtration is carried out through a plate filter, and fine filtration is carried out through a ceramic membrane filter.

7. The method for purifying the dropping pill cooling liquid for the cigarettes as claimed in claim 6, wherein: the pore diameter of the nano-film of the ceramic film filter is 80-120 nm.

8. The purification method of the dropping pill cooling liquid for the cigarettes as claimed in claim 1, wherein: the purifying agent added in S5 is modified hydrotalcite, and the mass ratio of the modified hydrotalcite to the yellow cooling liquid is 1: 15-20.

9. The purification method of the dropping pill cooling liquid for the cigarettes as claimed in claim 1, wherein: the preparation method of the modified hydrotalcite comprises the following steps: adding CaCl₂、FeCl₃And AlCl₃Mixing and uniformly stirring the solution to obtain a blending solution; then preparing a NaOH solution, slowly dropwise adding the blending solution into the NaOH solution, and continuously stirring and aging to obtain a modified solution; filtering the modified solution, collecting solids, drying, crushing and sieving to obtain the calcium-iron-aluminum modified hydrotalcite, wherein the solution adopts cooled distilled water.

10. The method for purifying the cooling liquid of the dropping pill for the cigarette as claimed in claim 8 or 9, wherein the method comprises the following steps: the modified hydrotalcite needs to be calcined and activated at the temperature of 450-650 ℃ before being used.

Technical Field

The invention relates to the technical field of production of dropping pills for cigarettes, in particular to a purification method of a cooling liquid of a dropping pill for cigarettes.

Background

The dropping pill, also called as bead blasting, has a burst feeling when being broken, and is mainly used in cigarettes at present, namely bead blasting cigarettes. The bead blasting smoke means: the cigarette with the filter tip provided with the liquid small rubber beads (the bead blasting for the cigarette) can make the cigarette more fragrant in the sucking process, strengthen the fragrance or the characteristic and make a smoker feel more comfortable. However, most of the existing bead-blasting cigarettes wrap the bead-blasting in the cigarette filter stick, so that consumers cannot see the bead-blasting in the cigarette filter stick and can only touch the bead-blasting by fingers to release essence in the bead-blasting cigarette.

In the production and forming process of the dripping pills, the dripping pills are dripped into cooling oil, and the cooling temperature is adjusted to finally complete the cooling and forming process of the dripping pills. In the using process of the cooling oil (namely, white oil), as part of raw materials (most of rubber powder) and water are dissolved in the cooling oil, the cooling oil is in an emulsified turbid state, on one hand, the online forming state of the dropping pill is difficult to observe, the dropping head cannot be adjusted in real time, and the eccentricity and the roundness of the dropping pill are poor; meanwhile, the cooling oil is turbid, and the cooling and forming effect of the dropping pill is also influenced. Thus, the drop pill forming rate is reduced.

Disclosure of Invention

The invention aims to provide a method for purifying dropping pill cooling liquid for cigarettes, aiming at the defects of the prior art, and the method realizes the purification, recovery and reutilization of waste turbid cooling liquid through multiple times of filtration and addition of an adsorbent and a purifying agent.

The invention provides 1. a purification method of dropping pill cooling liquid for cigarettes, which comprises the following steps:

s1: filtering the turbid cooling liquid for the first time to remove large-particle impurities;

s2: heating the turbid cooling liquid subjected to primary filtration, adding concentrated sulfuric acid, continuously stirring, standing for layering, and removing lower-layer precipitated liquid to obtain upper-layer cooling liquid;

s3: adding adsorbent into the upper layer cooling liquid, stirring uniformly, and standing for 3-4 d;

s4: carrying out secondary filtration on the cooling liquid with the adsorption adsorbent to obtain yellow cooling liquid;

s5: adding a purifying agent into the yellow cooling liquid, continuously stirring, standing, and filtering for three times to obtain colorless clean cooling liquid.

Further, the primary filtration in S1 was carried out by using a plate and frame filter. The plate and frame filter is used for pretreating the cooling liquid, so that dripping pill broken slag and fine raw material particles mixed in the cooling liquid are removed, the influence on the adding effect of subsequent additives is avoided, and part of functions of the large-particle slag are lost due to the combination of the large-particle slag and the adsorbent and the purifying agent, so that the action effect of the adsorbent and the purifying agent is reduced.

Further, the heating temperature range in S2 is 60 to 80 ℃. Because the viscosity of the cooling liquid has great influence on the sedimentation effect, generally, the sedimentation effect is faster when the temperature is higher, but the cooling liquid is easier to be oxidized when the temperature is higher, the invention adopts the temperature range of 60-80 ℃, thereby not only ensuring a certain sedimentation effect, but also avoiding the cooling liquid from being oxidized due to overhigh temperature.

Further, the volume ratio of the concentrated sulfuric acid to the turbid cooling liquid in S2 is 1: 8-12. The purpose of adding sulfuric acid is to make part of impurities in the cooling liquid and concentrated sulfuric acid produce sulfonation reaction, further produce precipitation and sedimentation, and then be filtered and removed together.

Further, the adsorbent in S3 comprises 8-12 parts by mass of activated carbon, 25-35 parts by mass of water-absorbent resin and 17-23 parts by mass of molecular sieve porous particles.

The adsorption type of the activated carbon is divided into three types, namely physical adsorption, chemical adsorption and ion exchange adsorption according to different adsorption forces on the surface of the solid:

physisorption is the absorption of an adsorbent and an adsorbate (solute) through the onset of molecular forces referred to as physisorption. This is the most common form of adsorption, which is characterized by adsorbate molecules that are not attached to external points of attachment of the adsorbent, but rather move somewhat at the interface. Because adsorption is caused by molecular force, the heat of adsorption is small, physical adsorption does not need activation energy and can be carried out under the condition of low temperature. This adsorption is reversible, and the molecules adsorbed together by adsorption also move thermally away from the solid surface, an appearance known as desorption. The physical adsorption may constitute a monomolecular adsorption layer or a polymolecular adsorption layer. Since intermolecular forces are ubiquitous, one adsorbent can adsorb a plurality of substances, but the amount of adsorption varies because the adsorbates (solutes) are different in nature.

Chemisorption is the effect of chemical bonds between the adsorbent and the adsorbate (solute), and chemical reactions are initiated to firmly link the adsorbent and the adsorbate (solute). Since chemical reactions require a lot of activation energy, it is generally required to perform at higher temperatures and the heat of adsorption is greater. Chemisorption is selective adsorption, i.e., an adsorbent has an adsorption effect only on a certain substance or specific substances. Because chemisorption is performed by direct chemical bonding force between the adsorbent and the adsorbate, chemisorption can only be formed as a single layer, and adsorption is relatively stable and not easy to desorb, and the adsorption is directly related to the external chemical property of the adsorbent and is related to the chemical property of the adsorbate.

Ac adsorption is the concentration of ions of a substance on the charged spots on the surface of the adsorbent due to electrostatic attraction, accompanied by an equivalent amount of ions during the adsorption process, i.e. each adsorbed ion of an adsorbate (solute). The adsorbents together emit an equal amount of ions, i.e., ionic communication. The charge of the ions is the determining factor for ac adsorption. The more charge an ion has, the stronger its adsorption at the counter-charged sites on the exterior of the adsorbent, if the concentration of the adsorbate (solute) is the same. For ions of the same charge, the smaller the hydration radius, the closer the adsorption site can be, and adsorption is facilitated. Physical adsorption and chemical adsorption favor ion exchange adsorption, and 3 adsorption effects can better achieve the cooling liquid purification effect in the activated carbon adsorption treatment process.

A water-Absorbent resin (SAP) is a novel functional Polymer material. It has a high water-absorbing function of absorbing water several hundred to several thousand times heavier than itself, and is excellent in water retention property, and once it swells to form hydrogel upon water absorption, it is difficult to separate water even under pressure. The super absorbent resin is a functional polymer material with a large number of hydrophilic groups. The water in the cooling liquid can be effectively removed. Meanwhile, the high water absorption polymer has the characteristics of no toxicity, no irritation to human bodies, no side effect, no blood coagulation and the like, so that the safety of consumers when smoking cigarettes is further ensured.

The invention adopts ZSM-35 molecular sieve porous particles, which have the advantages of excellent thermal stability, hydrothermal stability, proper pore size, adjustable acidity and the like, and have excellent selectivity and stability in olefin isomerization reaction; the ZSM-35 type molecular sieve porous particles belong to FER structures, have ten-element pore channels (0.42 x 0.54 nm) parallel to a 001 surface and eight-element pore channels (0.35 x 0.48 nm) parallel to a 010 surface, and cross sheets of the pore channels form 0.6-0.7nm spherical cages, so that the ZSM-35 type molecular sieve porous particles have excellent adsorption performance and better shape selectivity.

The space structure interval of the porous particles of the molecular sieve is larger, a certain microporous grid structure is formed, the specific surface area of the porous active substance is large, the target ions are easier to adsorb, and the polar substances in the cooling liquid can be effectively removed.

Further, the secondary filtering step in S4 is: coarse filtration is carried out through a plate filter, and fine filtration is carried out through a ceramic membrane filter. The purpose of secondary filtration is to remove the adsorbent after the adsorption, because the adsorbent adsorbs the back, and the volume grow, mostly can form certain large granule, at first need get rid of it through the plate filter, then carries out the fine filtration through the ceramic membrane filter again, and the purpose lies in getting rid of the adsorbent as far as possible, avoids its and follow-up depurative reaction to combine.

Furthermore, the pore size of the nano-membrane of the ceramic membrane filter is 80-120 nm.

Further, the purifying agent added in S5 is modified hydrotalcite, and the mass ratio of the modified hydrotalcite to the yellow cooling liquid is 1: 15-20.

Further, the preparation method of the modified hydrotalcite comprises the following steps: mixing CaCl2, FeCl3 and AlCl3 solutions, and uniformly stirring to obtain a blending solution; then preparing a NaOH solution, slowly dropwise adding the blending solution into the NaOH solution, and continuously stirring and aging to obtain a modified solution; filtering the modified solution, collecting solids, drying, crushing and sieving to obtain the calcium-iron-aluminum modified hydrotalcite, wherein the solution adopts cooled distilled water.

Further, the modified hydrotalcite needs calcination activation treatment at 450-650 ℃ before use.

According to the purification method of the dropping pill cooling liquid for the cigarettes, impurities in turbid cooling liquid are gradually removed through multi-section and multi-time adsorption filtration, and the removal effect is thorough; polar and non-polar substances in the cooling liquid can be effectively removed through the active carbon and the porous particles of the molecular sieve, and meanwhile, the active carbon and the porous particles of the molecular sieve have strong selectivity and adsorbability on fine dust residues; the water in the cooling liquid can be effectively removed through the water-absorbent resin, so that the condition of emulsifying the cooling liquid is reduced or avoided; the modified hydrotalcite can not only further adsorb and purify the cooling liquid, but also carry out decoloration treatment.

Detailed Description

The invention will be further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, various changes or modifications of the present invention may be made by those skilled in the art, and equivalents may fall within the scope of the claims of the present application. The proportions in the examples of the invention are by weight.