阅读说明：本技术 一种硝化棉基固体酒精的制备方法 (Preparation method of nitrocotton-based solid alcohol ) 是由 张仁旭 阳洪 袁满 孟先利 夏晓玉 于 2020-11-24 设计创作，主要内容包括：本发明公开了一种硝化棉基固体酒精的制备方法,具体为：首先,将质量浓度为97％以上的甲醇与硝化棉混合,静置,搅拌30min,使得硝化棉完全溶解,然后再加入质量浓度为85％以上的甲醇,搅拌直至再次完全溶解；之后倒入圆柱形的渗透膜中密封,并在水中浸泡,固化成型；将得到的圆柱形固体酒精从渗透膜中取出切片,片状固体酒精包装成袋。本发明方法,无需加热,制备过程中甲醇挥发量少,同时除了硝化棉、甲醇、水之外,无需加入其他化学原料,浸泡采用的水循环使用,零排放,成本低,生产方法简单。该方法制备得到的固体酒精,质量稳定,成分均一,燃烧时间持久,无烟无异味,可长期密封存储且不离浆。(The invention discloses a preparation method of nitrocotton-based solid alcohol, which comprises the following steps: firstly, mixing methanol with the mass concentration of more than 97% with nitrocotton, standing, stirring for 30min to completely dissolve the nitrocotton, then adding the methanol with the mass concentration of more than 85%, and stirring until the methanol is completely dissolved again; then pouring the mixture into a cylindrical permeable membrane for sealing, soaking the membrane in water, and curing and forming; taking the obtained cylindrical solid alcohol out of the permeable membrane, slicing, and packaging the flaky solid alcohol into bags. The method of the invention does not need heating, has less methanol volatilization amount in the preparation process, simultaneously does not need to add other chemical raw materials except nitrocotton, methanol and water, and has the advantages of zero discharge, low cost and simple production method because the water used for soaking is recycled. The solid alcohol prepared by the method has stable quality, uniform components, lasting burning time, no smoke and peculiar smell, and can be stored in a sealed manner for a long time without separation.)

1. The preparation method of the nitrocotton-based solid alcohol is characterized by comprising the following steps:

step 1, dissolving nitrocotton: mixing methanol with the mass concentration of more than 97% with nitrocotton, standing at normal temperature, stirring for 30min to completely dissolve the nitrocotton, then adding the methanol with the mass concentration of more than 85%, and stirring until the methanol is completely dissolved again;

step 2, curing and forming: pouring the dissolved uniform solution into a cylindrical permeable membrane, sealing, soaking in water, and curing and molding;

step 3, slicing and packaging: taking the obtained cylindrical solid alcohol out of the permeable membrane, slicing, and packaging the flaky solid alcohol into bags.

2. The method for preparing nitrocotton-based solid alcohol according to claim 1, wherein in the step 1, the mass ratio of nitrocotton to methanol in the initial dissolution is 1: 20; during the second dissolution, the mass ratio of the nitrocotton to the methanol is 1: 30.

3. the method for preparing nitrocotton-based solid alcohol according to claim 1, wherein in the step 1, the viscosity of the nitrocotton is 500 seconds, and the water content of the nitrocotton is 25-35%.

4. The method for preparing nitrocotton-based solid alcohol according to claim 1, wherein the standing time in step 1 is 30-120 min.

5. The method for preparing nitrocotton-based solid alcohol according to claim 1, wherein in the step 2, the soaking time is 10 to 30 hours.

6. The method for preparing nitrocotton-based solid alcohol according to claim 1, wherein in the step 3, the diameter of the cylindrical permeable membrane is 6cm to 10 cm.

7. The method for preparing nitrocotton-based solid alcohol according to claim 1, wherein in the step 3, the thickness of the flake solid alcohol is 1-2.5 cm.

Technical Field

The invention belongs to the technical field of solid fuel preparation, and particularly relates to a preparation method of nitrocotton-based solid alcohol.

Background

The solid alcohol is a solid fuel prepared by adding a curing agent into a liquid fuel, solves the defects of difficult carrying and low use safety of the liquid fuel, and is widely applied to food service industries such as hotels, families, restaurants and the like. The solid alcohol is convenient to carry, safe and sanitary to use, and is an ideal fuel for field operations such as geology, troops and the like. The solid alcohol is mostly prepared by using industrial alcohol (low carbon alcohol such as methanol, ethanol and the like) as a main raw material and adding a curing agent, a stabilizing agent, a modifying agent and the like. Common curing agents include paraffin, calcium acetate, stearic acid and sodium hydroxide, organic cellulose products, high molecular polymers, and the like. However, the solid alcohol prepared by the curing agent is not beneficial to long-term storage, is suitable for being used as prepared, has short burning time, generates black smoke during burning, is not suitable for being used indoors for a long time, and is gradually melted along with the rise of temperature during use, so that the solid alcohol is extremely easy to soften and deform.

Solid alcohol prepared from nitrocotton in the current market has two problems: (1) the nitrocotton is stirred and dissolved in a large amount of methanol, so that coating is easily formed, the nitrocotton is insoluble, and the dissolving time is long; (2) the solid alcohol product has poor toughness, is easy to bend and break and is not beneficial to slicing.

Disclosure of Invention

The invention aims to provide a method for preparing nitrocotton-based solid alcohol, which solves the problems of short combustion time and poor toughness of the solid alcohol prepared by the prior art, realizes the cyclic utilization of waste water generated by solidification and reduces the preparation cost.

The technical scheme adopted by the invention is that the preparation method of the nitrocotton-based solid alcohol is implemented according to the following steps:

step 1, dissolving nitrocotton: mixing methanol with the mass concentration of more than 97% with nitrocotton, standing at normal temperature, stirring for 30min to completely dissolve the nitrocotton, then adding the methanol with the mass concentration of more than 85%, and stirring until the methanol is completely dissolved again;

step 2, curing and forming: pouring the dissolved uniform solution into a cylindrical permeable membrane, sealing, soaking in water, and curing and molding;

step 3, slicing and packaging: taking the obtained cylindrical solid alcohol out of the permeable membrane, slicing, and packaging the flaky solid alcohol into bags.

The present invention is also characterized in that,

in the step 1, the mass ratio of the nitrocotton to the methanol is 1: 20; during the second dissolution, the mass ratio of the nitrocotton to the methanol is 1: 30.

in the step 1, the viscosity of the nitrocotton is 500 seconds, and the water content of the nitrocotton is 25-35%.

In the step 1, the standing time is 30-120 min.

In the step 2, the soaking time is 10-30 hours.

In the step 3, the diameter of the cylindrical permeable membrane is 6 cm-10 cm.

In the step 3, the thickness of the flaky solid alcohol is 1-2.5 cm.

The invention has the beneficial effects that:

the preparation method of the solid alcohol disclosed by the invention has the advantages that heating is not needed, the volatilization amount of methanol in the preparation process is small, other chemical raw materials except nitrocotton, methanol and water are not needed to be added, the water adopted by soaking is recycled, zero emission is realized, the cost is low, and the production method is simple. The solid alcohol prepared by the method has stable quality, uniform components, lasting burning time, no smoke and peculiar smell, and can be stored in a sealed manner for a long time without separation.

Drawings

FIG. 1 is a flow chart of a method for preparing nitrocotton-based solid alcohol according to the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The invention relates to a preparation method of nitrocotton-based solid alcohol, which is specifically implemented according to the following steps as shown in figure 1:

step 1, dissolving nitrocotton: mixing methanol with the mass concentration of more than 97% with nitrocotton, standing for 30-120 min at normal temperature, stirring for 30min again to completely dissolve the nitrocotton, then adding methanol with the mass concentration of more than 85%, and stirring until the methanol is completely dissolved again;

during primary dissolution, the mass ratio of nitrocotton to methanol is 1: 20;

during the second dissolution, the mass ratio of the nitrocotton to the methanol is 1: 30, of a nitrogen-containing gas;

the viscosity of the nitrocotton is 500 seconds, so that the defects that the solid alcohol with too low viscosity is formed and is fragile, the solid alcohol with too high viscosity has high hardness and poor toughness are avoided;

the water content of the nitrocotton is 25-35%, and compared with nitrocotton containing wine, the cost is reduced;

standing to enable the methanol to fully infiltrate the nitrocotton and swell for 30-120 min, so that the nitrocotton is prevented from forming coating and insoluble by stirring;

step 2, curing and forming: pouring the dissolved uniform solution into a cylindrical permeable membrane, sealing, soaking in water for 10-30 hours, and curing and forming; the water used for soaking is as little as possible, which is based on just submerging the permeable membranes which are sequentially stacked; after solidification and forming, the soaked water is used for preparing methanol with the mass concentration of more than 85%, and no waste water is generated.

Step 3, slicing and packaging: taking the obtained cylindrical solid alcohol out of the permeable membrane, slicing, and packaging the flaky solid alcohol into bags;

the diameter of the cylindrical permeable membrane is 6 cm-10 cm; the thickness of the flaky solid alcohol is 1-2.5 cm.

Example 1

Adding 40kg of methanol with the mass concentration of 97% into a stirring kettle, adding 2kg of nitrocotton (500 seconds) with the water content of 25% into the stirring kettle, standing for 30min, stirring for 30min to form a uniform solution, then adding 20kg of methanol solution with the mass concentration of 95%, and stirring until the methanol solution is completely dissolved again; pouring the dissolved uniform solution into a cylindrical permeable membrane for sealing, stacking and soaking in water for 30 hours for once, and curing and forming; taking the obtained cylindrical solid alcohol out of the permeable membrane, slicing into slices with the thickness of 2.5cm, and packaging the slices into bags. The obtained solid alcohol can be stored for 3 months without separating pulp, and can be combusted for 14.4min under the condition of 30g in an open state, and has no smoke and peculiar smell, and the residue content is 0.5%.

Example 2

Adding 40kg of methanol with the mass concentration of 98% into a stirring kettle, adding 2kg of nitrocotton (500 seconds) with the water content of 30% into the stirring kettle, standing for 70min, stirring for 30min to form a uniform solution, adding 20kg of methanol solution with the mass concentration of 90%, and stirring until the methanol solution is completely dissolved again; pouring the dissolved uniform solution into a cylindrical permeable membrane for sealing, stacking and soaking in water for 20 hours for one time, and curing and molding; taking the obtained cylindrical solid alcohol out of the permeable membrane, slicing into slices with the thickness of 2.0cm, and packaging the slices into bags. The obtained solid alcohol can be stored for 3 months without separating pulp, and can be combusted for 14.5min under the condition of 30g in an open state, and has no smoke and peculiar smell, and the residue content is 0.64%.

Example 3

Adding 40kg of methanol with the mass concentration of 99% into a stirring kettle, adding 2kg of nitrocotton (500 seconds) with the water content of 35% into the stirring kettle, standing for 120min, stirring for 30min to form a uniform solution, adding 20kg of methanol solution with the mass concentration of 86%, and stirring until the methanol solution is completely dissolved again; pouring the dissolved uniform solution into a cylindrical permeable membrane for sealing, stacking and soaking in water for 10 hours for one time, and curing and molding; taking the obtained cylindrical solid alcohol out of the permeable membrane, slicing into slices with the thickness of 2.0cm, and packaging the slices into bags. The obtained solid alcohol can be stored for 3 months without separating pulp, and can be combusted for 14.3min under the condition of 30g in an open state, and has no smoke and peculiar smell, and the residue content is 0.2%.