阅读说明：本技术 一种烟草原料的脱色方法 (Method for decoloring tobacco raw material ) 是由 张克娟 李新生 薛洪龙 于 2020-07-14 设计创作，主要内容包括：本发明提供一种烟草原料的脱色方法,包括如下步骤：1)将烟草原料投放到含有二氧化硫脲和氢氧化钠的水溶液中浸泡；2)第一次洗涤烟草原料；3)再放入次氯酸钠水溶液中浸泡；4)第二次洗涤烟草原料。本申请中上述公开的烟草原料的脱色方法,脱色技术操作简单、成本低、效果好,对低次烟叶高附加值产品的综合利用开发具有重要的作用。(The invention provides a method for decoloring tobacco raw materials, which comprises the following steps: 1) putting tobacco raw materials into an aqueous solution containing thiourea dioxide and sodium hydroxide for soaking; 2) washing the tobacco raw material for the first time; 3) soaking in sodium hypochlorite water solution; 4) and washing the tobacco raw material for the second time. The method for decoloring the tobacco raw materials disclosed by the application has the advantages of simple operation, low cost and good effect, and plays an important role in the comprehensive utilization and development of low-grade tobacco high-added-value products.)

1. A method for decolorizing tobacco materials comprises the following steps:

1) putting tobacco raw materials into an aqueous solution containing thiourea dioxide and sodium hydroxide for soaking;

2) washing the tobacco raw material for the first time;

3) soaking in sodium hypochlorite water solution;

4) and washing the tobacco raw material for the second time.

2. The decoloring method according to claim 1, wherein the thiourea dioxide content in the step 1) is (1 to 15) g per 100g of water.

3. The decoloring method according to claim 1, wherein the content of sodium hydroxide in the water of step 1) is (1 to 10) g per 100g of water.

4. The decoloring method according to claim 1, wherein the temperature of the aqueous solution during the soaking in step 1) is 50 to 80 ℃.

5. The decoloring method according to claim 1, wherein in step 1), the mass ratio of the tobacco raw material to the aqueous solution containing thiourea dioxide and sodium hydroxide is 1: (10-20).

6. The decolorization method according to claim 1, characterized in that in step 1), the soaking time is at least 50 min.

7. The decoloring method according to claim 1, wherein in the step 2), the washing is performed by using clean water, and the adding proportion of the clean water is 8-15 times of the mass of the tobacco raw material.

8. The decoloring method according to claim 1, wherein the sodium hypochlorite is contained in the water in the step 3) (0.6 to 3g per 100g of the water.

9. The decoloring method according to claim 1, wherein the temperature of the aqueous solution during the soaking in step 3) is 40 to 80 ℃.

10. The decolorization method according to claim 1, characterized in that in step 3), the soaking time is at least 20 min; and/or in the step 4), washing with clean water for the second time, wherein the addition amount of the clean water is 10-20 times of the mass of the tobacco raw materials.

Technical Field

The invention relates to the field of paper-making reconstituted tobacco, in particular to a decoloring technology of tobacco raw materials.

Background

During the planting, processing and production of tobacco, there is inevitably a large amount of low-grade tobacco leaves, which accounts for about 25% of the total tobacco leaf yield. Many of these low-grade tobacco leaves are discarded as waste, resulting in a great deal of resource waste and environmental pollution. The comprehensive utilization problem of tobacco waste is emphasized from the last 60 years abroad, the tobacco waste is further processed into a plurality of products, such as tobacco type cigarette paper, lining paper, handbag, packaging paper and the like, domestic related technical research data and products are very few, and along with the increasing attention on the comprehensive utilization of tobacco raw materials, diversified application technologies of the tobacco raw materials are researched in a plurality of industrial fields.

The tobacco raw material is dark in color and not easy to decolor, and the appearance of a recycled and processed product is influenced, for example, after the tobacco raw material is added into cigarette paper, a large number of obvious black spots are formed on the surface of the cigarette paper, and the cigarette paper is like mildewed substances and does not meet the appearance requirement of the cigarette paper; meanwhile, the dark color of the tobacco raw material can interfere the printing and coloring of the recycled product, and the expected requirements of the product appearance cannot be met.

In order to further expand the application field and the possibility of the tobacco raw material, the technology for decoloring the tobacco raw material needs to be researched, so that the current literature on the technology for decoloring the tobacco raw material is very few, and great technical challenges are provided for the research on the technology for decoloring the tobacco raw material.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a solution to the problems of the prior art.

To achieve the above objects and other related objects, the present invention is achieved by the following technical solutions.

The invention provides a method for decoloring tobacco raw materials, which comprises the following steps:

1) putting tobacco raw materials into an aqueous solution containing thiourea dioxide and sodium hydroxide for soaking;

2) washing the tobacco raw material for the first time;

3) soaking in sodium hypochlorite water solution;

4) and washing the tobacco raw material for the second time.

According to the decoloring method, in the step 1), the content of thiourea dioxide is (1-15) g per 100g of water.

According to the decoloring method, in the step 1), the content of sodium hydroxide is (1-10) g per 100g of water.

According to the decoloring method, in the step 1), the temperature of the aqueous solution during soaking is 50-80 ℃.

According to the decoloring method, in the step 1), the mass ratio of the tobacco raw material to the aqueous solution containing thiourea dioxide and sodium hydroxide is 1: (10-20).

According to the decoloring method, in the step 1), the soaking time is at least 50min, and more preferably, the soaking time is 50min to 150 min.

According to the decoloring method, in the step 2), washing is performed by using clean water, and the adding proportion of the clean water is 8-15 times of the mass of the tobacco raw materials. Water was squeezed out after washing.

According to the decoloring method, in the step 3), sodium hypochlorite is contained in an amount of 0.6 to 3g per 100g of water.

According to the decoloring method, in the step 3), the temperature of the aqueous solution is 40-80 ℃ during soaking.

According to the decoloring method, in the step 3), the soaking time is at least 20min, and preferably, the soaking time is 20-60 min.

According to the decoloring method, in the step 4), the second washing is carried out by using clean water, and the addition amount of the clean water is 10-20 times of the mass of the tobacco raw materials. After washing, water is squeezed out.

The technical scheme of the application has the following technical effects:

the method for decoloring the tobacco raw materials disclosed by the application has the advantages of simple operation, low cost and good effect, and plays an important role in the comprehensive utilization and development of low-grade tobacco high-added-value products.

Drawings

FIG. 1 is a photograph of a tobacco material before the decolorization treatment in example 1

FIG. 2 is a photograph of the decolorized tobacco material in example 1

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It is to be understood that the processing equipment or apparatus not specifically identified in the following examples is conventional in the art.

Furthermore, it is to be understood that one or more method steps mentioned in the present invention does not exclude that other method steps may also be present before or after the combined steps or that other method steps may also be inserted between these explicitly mentioned steps, unless otherwise indicated; it is also to be understood that a combined connection between one or more devices/apparatus as referred to in the present application does not exclude that further devices/apparatus may be present before or after the combined device/apparatus or that further devices/apparatus may be interposed between two devices/apparatus explicitly referred to, unless otherwise indicated. Moreover, unless otherwise indicated, the numbering of the various method steps is merely a convenient tool for identifying the various method steps, and is not intended to limit the order in which the method steps are arranged or the scope of the invention in which the invention may be practiced, and changes or modifications in the relative relationship may be made without substantially changing the technical content. .