阅读说明：本技术 一种赤藓糖醇母液在环保墙体材料中的应用 (Application of erythritol mother liquor in environment-friendly wall material ) 是由 李培功 王红霞 陈旸 赵熳 李磊 刘鎏 于 2021-01-25 设计创作，主要内容包括：本发明涉及建筑材料技术领域,具体涉及一种赤藓糖醇母液在环保墙体材料中的应用。具体为赤藓糖醇母液经处理后制备环保墙体材料；所述赤藓糖醇母液处理步骤为：向赤藓糖醇废母液中加入质量体积比0.2-2.0g/100mL的活性炭,加热至70-80℃保温脱色,调节pH＝4.0-5.0,然后加入焦磷酸钠和二乙烯三胺五甲叉磷酸钠,搅拌混合后得处理液。添加赤藓糖醇母液以提升环保墙体材料的强度和耐久性,实现赤藓糖醇副产物的资源化利用,绿色环保。(The invention relates to the technical field of building materials, and particularly relates to application of erythritol mother liquor in an environment-friendly wall material. Specifically, an environment-friendly wall material is prepared by treating erythritol mother liquor; the erythritol mother liquor treatment method comprises the following steps: adding activated carbon with the mass volume ratio of 0.2-2.0g/100mL into the erythritol waste mother liquor, heating to 70-80 ℃, keeping the temperature and decoloring, adjusting the pH to 4.0-5.0, then adding sodium pyrophosphate and diethylenetriamine pentamethylene sodium phosphate, and stirring and mixing to obtain a treatment solution. The erythritol mother liquor is added to improve the strength and durability of the environment-friendly wall material, so that the resource utilization of erythritol by-products is realized, and the environment-friendly wall material is green and environment-friendly.)

1. The application of the erythritol mother liquor in the environment-friendly wall material is characterized in that the erythritol mother liquor is treated to prepare the environment-friendly wall material;

the erythritol mother liquor treatment method comprises the following steps: adding activated carbon with the mass volume ratio of 0.2-2.0g/100mL into the erythritol waste mother liquor, heating to 70-80 ℃, keeping the temperature and decoloring, adjusting the pH to 4.0-5.0, then adding sodium pyrophosphate and diethylenetriamine pentamethylene sodium phosphate, and stirring and mixing to obtain a treatment solution.

2. The application of the erythritol mother liquor in environment-friendly wall materials as claimed in claim 1, wherein the activated carbon is powdered activated carbon, and the particle size of the powdered activated carbon is 200-250 meshes.

3. The application of the erythritol mother liquor in environment-friendly wall materials according to claim 1, wherein the decoloring time is 30-60 min.

4. The application of the erythritol mother liquor in the environment-friendly wall material according to claim 1, wherein the mass-volume ratio of the sodium pyrophosphate to the erythritol mother liquor is 1-5g/100 mL.

5. The application of the erythritol mother liquor in environment-friendly wall materials according to claim 1, wherein the mass-volume ratio of the diethylenetriamine pentamethylene sodium phosphate to the erythritol mother liquor is 1-5g/100 mL.

6. The application of the erythritol mother liquor in the environment-friendly wall material as claimed in claim 1, wherein the stirring speed is 800-1200r/min, and the stirring time is 20-40 min.

7. The application of the erythritol mother liquor in the environment-friendly wall material is characterized in that the treatment liquid accounts for 0.2-5% of the total raw material weight of the environment-friendly wall material.

Technical Field

The invention relates to the technical field of building materials, and particularly relates to application of erythritol mother liquor in an environment-friendly wall material.

Background

The environment-friendly wall material can effectively reduce environmental pollution, saves production cost, has higher economic environmental significance, and mainly comprises light aggregate concrete blocks, perforated bricks, foamed concrete blocks and the like. The lightweight aggregate concrete block is a heat-insulating wall material formed by using cement and lightweight aggregate as main raw materials, using expanded perlite, ceramsite and expanded vermiculite as heat-insulating media and using cement as a cementing material. Although the lightweight aggregate concrete block has the advantages of light weight and good heat insulation performance, the lightweight aggregate concrete block still has the phenomena of low strength and wall cracking.

Erythritol is a novel fermentation type low-calorie sweetener produced by adopting advanced biotechnology and has a chemical name of 1,2,3, 4-erythritol. Based on the characteristics of low heat, small side effect and the like of the erythritol, the erythritol has wide application prospect in high-grade foods, cosmetics, medicine sugar coatings and flavoring agents. The main byproducts in the existing erythritol production process are waste thalli left after ceramic membrane filtration and waste mother liquor obtained after erythritol crystallization separation. The waste mother liquor is complex in component and high in viscosity, if high value-added components are extracted and utilized, the cost is increased, and if the high value-added components are directly discharged, the environment is polluted and resources are wasted, so that from the aspects of environmental protection, economy and social benefits, how to adopt an effective means to utilize the waste mother liquor and realize the resource utilization of the erythritol by-product is imperative.

At present, no report on the application of the erythritol mother liquor in preparing environment-friendly wall materials exists.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the application of the erythritol mother liquor in the environment-friendly wall material, and the erythritol mother liquor is used for preparing the environment-friendly wall material after being treated, so that the strength and durability of the environment-friendly wall material are improved, the resource utilization of erythritol byproducts is realized, and the environment is protected.

The invention aims to provide application of an erythritol mother liquor in an environment-friendly wall material, and particularly relates to an environment-friendly wall material prepared by treating the erythritol mother liquor so as to improve strength and durability;

the erythritol mother liquor treatment method comprises the following steps: adding activated carbon with the mass volume ratio of 0.2-2.0g/100mL into the erythritol waste mother liquor, heating to 70-80 ℃, keeping the temperature and decoloring, adjusting the pH to 4.0-5.0, then adding sodium pyrophosphate and diethylenetriamine pentamethylene sodium phosphate, and stirring and mixing to obtain a treatment solution.

Furthermore, the activated carbon is powdered activated carbon, and the particle size of the powdered activated carbon is 200-250 meshes. The erythritol mother liquor is an intractable fermentation industrial wastewater with more solid matters, higher viscosity and deep chroma, contains a large amount of pigments, and is decolorized by adopting activated carbon.

Further, the decoloring time is 30-60 min. Ensuring the pigment to fully contact with the surface of the active carbon, thereby improving the decolorization rate.

Further, the mass-volume ratio of the sodium pyrophosphate to the erythritol mother liquor is 1-5g/100 mL. The sodium pyrophosphate has a complement effect on the erythritol, avoids the problem that sugar alcohol substances in the erythritol mother liquor are easy to desorb, and also has proper softening water and antioxidant effects.

Furthermore, the mass volume ratio of the sodium diethylenetriamine pentamethylene phosphate to the erythritol mother liquor is 1-5g/100 mL. The long-term evolution of the structure of the environment-friendly wall material is caused by internal reasons or external reasons, and finally the masonry material loses the using capability, particularly the freeze-thaw damage. The sodium diethylenetriamine pentamethylene phosphate can improve the heat storage performance of the environment-friendly wall material, thereby improving the durability.

Further, the stirring speed is 800-. Sodium pyrophosphate and diethylenetriamine pentamethylene sodium phosphate are added into the erythritol mother liquor and compounded with the components of erythritol, arabitol and the like in the erythritol mother liquor, so that the strength and durability of the wall material can be improved.

Furthermore, the environment-friendly wall material is formed by taking cement as a bonding agent and ceramsite as aggregate.

Furthermore, the treating fluid accounts for 0.2-5% of the total weight of the raw materials of the environment-friendly wall material.

The beneficial effect of the invention is that,

(1) the erythritol mother liquor contains a large amount of high-value components such as erythritol, arabitol and mannitol, has high viscosity, is used for preparing environment-friendly wall materials, particularly for preparing light aggregate concrete blocks, improves the cohesiveness of cement, can prolong the retention time of working performance, and can improve the compressive strength and durability of the light aggregate concrete blocks;

(2) sodium pyrophosphate and diethylenetriamine pentamethylene sodium phosphate are added into the erythritol mother liquor and are compounded with erythritol, arabitol and other components in the erythritol mother liquor, so that the hydration heat of cement in the environment-friendly wall material is reduced, cracks caused by temperature stress are reduced, the microstructure of the cement is improved, the compactness is increased, the compressive strength of the wall material can be further improved, the heat storage performance of the environment-friendly wall material can be improved, and the durability is improved.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

An application of an erythritol mother liquor in an environment-friendly wall material, in particular to an environment-friendly wall material prepared by treating the erythritol mother liquor;

the erythritol mother liquor treatment method comprises the following steps: adding activated carbon with the mass-volume ratio of 1.0g/100mL into the erythritol waste mother liquor, heating to 75 ℃, keeping the temperature and decoloring for 45min, adjusting the pH to 4.5, then adding sodium pyrophosphate with the mass-volume ratio of 2g/100mL and diethylenetriamine pentamethylene sodium phosphate with the mass-volume ratio of 2g/100mL, stirring at 1000r/min for 30min, and mixing to obtain a treatment solution; the mass-volume ratios are all based on erythritol mother liquor;

the environment-friendly wall material comprises the following raw materials in percentage by mass: the raw materials contain 20 wt% of cement, 50 wt% of apparent density 450 ℃650Kg/m³Ceramsite with the particle size of 5-50 mm and the apparent density of 20 wt% of 300Kg/m³The following perlite, 6% is fly ash and 4% water.

Adding 4% of treatment fluid into the wall material; the treatment liquid accounts for the total weight of the raw materials of the wall material.

Example 2

An application of an erythritol mother liquor in an environment-friendly wall material, in particular to an environment-friendly wall material prepared by treating the erythritol mother liquor;

the erythritol mother liquor treatment method comprises the following steps: adding activated carbon with the mass-volume ratio of 0.5g/100mL into the erythritol waste mother liquor, heating to 70 ℃, keeping the temperature and decoloring for 60min, adjusting the pH to 5.0, then adding sodium pyrophosphate with the mass-volume ratio of 1g/100mL and diethylenetriamine pentamethylene sodium phosphate with the mass-volume ratio of 1g/100mL, stirring at 8000r/min for 20min, and mixing to obtain a treatment solution;

the environment-friendly wall material comprises the following raw materials in percentage by mass: the raw materials comprise 20 wt% of cement and 50 wt% of apparent density of 450-650 Kg/m³Ceramsite with the particle size of 5-50 mm and the apparent density of 20 wt% of 300Kg/m³The following perlite, 6% is fly ash and 4% water.

Adding 1% of treatment fluid into the wall material; the treatment liquid accounts for the total weight of the raw materials of the wall material.

Example 3

An application of an erythritol mother liquor in an environment-friendly wall material, in particular to an application of the erythritol mother liquor in preparing the environment-friendly wall material after being processed;

the erythritol mother liquor treatment method comprises the following steps: adding activated carbon with the mass-volume ratio of 2.0g/100mL into the erythritol waste mother liquor, heating to 80 ℃, keeping the temperature and decoloring for 30min, adjusting the pH to 4.0, then adding sodium pyrophosphate with the mass-volume ratio of 5g/100mL and diethylenetriamine pentamethylene sodium phosphate with the mass-volume ratio of 5g/100mL, stirring at 1200r/min for 40min, and mixing to obtain a treatment solution;

the environment-friendly wall material comprises the following raw materials in percentage by mass: the raw materials comprise 20 wt% of cement and 50 wt% of apparent density450～650Kg/m³Ceramsite with the particle size of 5-50 mm and the apparent density of 20 wt% of 300Kg/m³The following perlite, 6% is fly ash and 4% water.

Adding 0.2% of treatment fluid into the wall material; the treatment liquid accounts for the total weight of the raw materials of the wall material.

Comparative example 1

The difference from example 1 is that sodium pyrophosphate was not added.

Comparative example 2

The difference from example 1 is that sodium diethylenetriamine pentamethylene phosphate is not added.

Comparative example 3

The difference from example 1 is that sodium pyrophosphate and sodium diethylenetriamine pentamethylene phosphate are not added.

Test example

The performance tests of examples 1 to 3 and comparative examples 1 to 3 were carried out, and the specific results are shown in Table 1.

And setting an environment-friendly wall material without the treatment fluid as a control group.

TABLE 1 results of Performance test of examples 1-3 and comparative examples 1-3

As can be seen from Table 1, the wall material prepared by processing the erythritol mother liquor can increase the strength and durability, and the strength and durability of the environment-friendly wall material are further improved by compounding sodium pyrophosphate and diethylenetriamine pentamethylene sodium phosphate contained in the processing liquor.

Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and the spirit of the present invention, and any changes or substitutions which are within the technical scope of the present invention and are easily conceived by those skilled in the art are within the technical scope of the present invention. Therefore, the protection scope of the present invention is subject to the protection scope of the claims.