Application of sodium peroxide mixing solution containing sodium ozonide in preparing paper pulp

A technology of sodium peroxide and sodium ozonation, which is used in chemical/chemical mechanical pulping, pulping with inorganic alkali, etc., can solve the high requirements of heat resistance, pressure resistance and corrosion resistance of cooking equipment, high content of caustic soda and organic matter in waste water, and heavy weight. Water pollution and other problems, to achieve the effect of improving work efficiency and equipment utilization, reducing equipment investment, and improving resource utilization

Inactive Publication Date: 2007-11-28
STATE GRID CORP OF CHINA +1
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  • Abstract
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AI Technical Summary

Problems solved by technology

At present, papermaking from straw mainly adopts the traditional caustic soda method for pulping. The disadvantages of the process are: (1) The waste water produced has a relatively high content of caustic soda and organic matter, which pollutes the environment and requires more investment in pollution control.
Some enterprises, especially small and medium-sized papermaking enterprises, often discharge waste water without treatment in order to obtain the maximum profit. They are one of the "five small" enterprises banned by the state; The energy consumption is high, and the requirements for heat resistance, pressure resistance and corrosion resistance of cooking equipment are high; (3) the removal of lignin, sugar and dissociation and bleaching of cellulose are completed by multiple processes respectively, and the production process is relatively complicated, which further aggravates the pollution of water bodies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1. prepare JHO3: by the preparation method of the sodium peroxide mixed solution that contains ozonated sodium that Chinese invention patent publication CN1360848A provides, prepare the sodium peroxide mixed solution (hereinafter referred to as JHO3) that contains sodium ozonated; JHO Stability is relatively poor, It can be stable at room temperature for more than ten hours. It should be prepared immediately after use. The presence of alcohol will not affect the performance of JHO3. The hydrogen peroxide used in this embodiment is more than or equal to 30%. Sodium hydroxide ≥ 96%, alcohol ≥ 95.5%.

[0017] ② Straw pretreatment: Moisten and cut short (about 0.5cm) of wheat tangerines and knead the velvet to improve the uniformity of the material, and require the moisture to be evenly soaked, with the degree of water dripping between the fingers.

[0018] ③Pulping: Take the pretreated wheat straw material, put it into the reaction kettle, adjust it to 10% solid content w...

Embodiment 2

[0020] The method of embodiment 1 is made pulp with wheat straw pretreatment material. Only after adding JHO3, open the door and boil without pressure for 30 minutes. Other processing conditions are all with embodiment 1. The slurry is washed, dried and weighed, and the fiber yield is 50%; fiber properties: light yellow, well dissociated and interwoven, with a little fiber bundles.

Embodiment 3

[0022] The method of embodiment 1 is made pulp with straw pretreatment material. Only cooking pressure is brought up to 50kpa, and other processing conditions are all the same as embodiment 1. The slurry was washed, dried and weighed, and the fiber yield was 45%. Fiber properties: pure white, excellent dissociation and interweaving, good uniformity, no fiber bundles.

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Abstract

A sodium peroxide with ozonide applies into the producing of paper pulp. The pretreatment straw mixed with the sodium peroxide with ozonide, and it cooks at the pressure of 1-200kpa to get the wheat or white paper pulp. Comparing to the current technology, it has the advantage as fellow, 1. The volume of the alkali reduces 4-5times than the traditional technology, and the waste water can directly use. 2. The JHO3 has the bleach function at the same time, and there is no need chlorine and the chloric derivatives as the bleach agent. 3. The cooking pressure reduces 4-5 times than the traditional technology, and it can reduce the consumption of the energy and the investment of the equipment. 4. The cooking time reduces 1-3 times can improve the efficiency of wording and the ratio of equipment usage. 5. The output of fibre can improve 3-5 percent, and it can reduce the cost and improve the ratio of source.6. The waste water can be as the organic complex fertilizer.

Description

technical field [0001] The invention relates to the application of a sodium peroxide mixed solution containing sodium ozonide in pulp preparation. Background technique [0002] Straw is the largest and most widely distributed agricultural leftover, one of the main sources of rural environmental pollution, and also a renewable resource. For a long time, people have been constantly trying to use it, turn harm into benefit, and turn waste into treasure. Making paper with straw is exactly one of the important ways to make full use of resources. At present, papermaking from straw mainly adopts the traditional caustic soda method for pulping. The disadvantages of the process are: (1) The waste water produced has a relatively high content of caustic soda and organic matter, which pollutes the environment and requires more investment in pollution control. It takes about 500 yuan to process the waste water produced by producing one ton of pulp. Some enterprises, especially small a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/02D21H11/02
Inventor 黄正华
Owner STATE GRID CORP OF CHINA
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