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Technique for producing mlcrocrystalline cellulose by sulfated waste velveteen

A technology of microcrystalline cellulose and a process method, which is applied in the field of producing microcrystalline cellulose from sulfated waste cotton linters, can solve problems such as unstable quality, harm to human health, and chlorine gas emissions, and achieve energy consumption reduction and environmental pollution The effect of small size and the total amount of waste liquid

Inactive Publication Date: 2010-12-15
王跃成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] my country is a large cotton-producing country. In the past, the sulfated waste lint discharged from cotton seed processing was treated as waste. The main method of treatment was incineration, which not only required investment in treatment costs, wasted manpower, material resources, and financial resources, but also caused pollution to the atmosphere. pollution
Chinese patent CN1081185A discloses the process of producing microcrystalline cellulose with sulfated waste cotton linters, which mainly adopts high-temperature neutralization, degradation bleaching, drying, crushing, sieving and other processes. This process has the disadvantages of high energy consumption and unstable quality. defect
[0005] There will be a large amount of chlorine gas emission, which will seriously endanger human health if not handled properly

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 1Kg of sulfated waste lint and immerse it in 5Kg of water and stir it fully for 30 minutes, add sodium hydroxide quantitatively in several times, add 10g each time, stir for 30 minutes after adding, test the acidity of the mixed solution after adding alkali each time, until the mixed solution When the pH value is greater than 7, take the time closest to 7, and record the ratio of the amount of alkali that should be added per Kg of water; first use a 5mm sieve to remove the large impurities in the sulfated waste lint, and use 1 part by weight of the sulfated waste lint : Take water in the proportion of 5 parts by weight of water, add sodium hydroxide in proportion to the amount of alkali that should be added according to the measurement and detection, stir and fully dissolve, add sulfated waste lint and fully stir and neutralize for 3 hours, then use a 75 μm sieve with an aperture Filter and dry until the moisture content is lower than 25%, immerse the neutralized co...

Embodiment 2

[0020] Take 1Kg of sulfated waste lint and immerse it in 8Kg of water and stir it fully for 20 minutes, add calcium hydroxide quantitatively in several times, add 30g for the first time, then add 15g each time, stir for 30 minutes after each addition, and test each addition The acidity of the mixed solution after the alkali, until the PH value of the mixed solution is greater than 7, take the one closest to 7, and record the ratio of the amount of alkali that should be added per Kg of water; first use a 3mm sieve to remove the large impurities in the sulfated waste lint , take water according to the ratio of 1 part by weight of sulfated lint: 8 parts by weight of water, add calcium hydroxide in proportion to the amount of alkali that should be added according to the measurement and detection, stir and fully dissolve, add sulfated lint and fully stir Neutralize for 3 hours, then filter with a 75 μm sieve and dry until the moisture content is less than 25%, immerse in a 2% sodium...

Embodiment 3

[0022] Get 1Kg of sulfated waste lint and immerse it in 15Kg of water and stir it fully for 15 minutes, add sodium hydroxide quantitatively in several times, add 50g for the first time, add 30g for the second time, then add 10g each time, and stir for 20 minutes after each addition. Minutes, test the acidity of the mixed solution after adding alkali each time, until the pH value of the mixed solution is greater than 7, take the time closest to 7, record the ratio of the amount of alkali that should be added per Kg of water; first use a 1.5mm sieve to filter the sulfated waste To remove the large impurities in the lint, take water according to the ratio of 1 part by weight of sulfated waste lint: 15 parts by weight of water, add sodium hydroxide in proportion to the amount of alkali that should be added according to the measurement and detection, stir and fully dissolve, add Sulfated waste lint was fully stirred and neutralized for 6 hours, then filtered through a sieve with a p...

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PUM

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Abstract

The invention discloses a process method which adopts sulfated waste velveteen to produce microcrystalline, mainly including the following steps: measuring and detecting, quantitative neutralization, bleaching, washing, drying, crashing and sieving. The process method is characterized in that in the measuring and detecting process, first, the proportion of alkali used to neutralize sulfated wastevelveteen is detected, then alkali solution is prepared according to the proportion and quantitative sulfated waste velveteen is added for quantitative neutralization, and finally the bleaching process is carried out. Compared with the prior art, the process method requires less energy to process the sulfated waste velveteen; particularly, the proportioning measurement is adopted to determine theamount of waste velveteen and alkali, which reduces the amount of used alkali to the minimum while sufficiently ensuring the quality of the microcrystalline cellulose and greatly reducing production cost. The discharge liquid is neutral or approximately neutral and has little pollution to the environment. On the other hand, the water amount used during neutralization is small, the total dischargeliquid is small in amount and is easy to be disposed without pollution, and the cost is also greatly reduced.

Description

technical field [0001] The invention relates to a process for producing microcrystalline cellulose with sulfated waste cotton linters. technical background [0002] my country is a large cotton-producing country. In the past, the sulfated waste lint discharged from cotton seed processing was treated as waste. The main method of treatment was incineration, which not only required investment in treatment costs, wasted manpower, material resources, and financial resources, but also caused pollution to the atmosphere. pollution. Chinese patent CN1081185A discloses the process of producing microcrystalline cellulose from sulfated waste cotton linters, which mainly adopts high-temperature neutralization, degradation bleaching, drying, crushing, and sieving. This process has the disadvantages of high energy consumption and unstable quality. defect. The production method disclosed in the Chinese patent CN1220271A uses sulfated waste cotton linters to produce microcrystalline cellul...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C5/00
Inventor 王跃成
Owner 王跃成