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Process of producing sodium carboxymethyl cellulose with papermaking sludg as material

A technology for sodium carboxymethyl cellulose and papermaking sludge is applied in the field of sodium carboxymethyl cellulose production, and achieves the effects of protecting the ecological environment, concise process steps and low production cost

Inactive Publication Date: 2007-08-22
北京盖雅技术中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The practice of producing CMC with papermaking sludge has not been reported at home and abroad

Method used

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  • Process of producing sodium carboxymethyl cellulose with papermaking sludg as material
  • Process of producing sodium carboxymethyl cellulose with papermaking sludg as material
  • Process of producing sodium carboxymethyl cellulose with papermaking sludg as material

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Effect test

Embodiment 1

[0024] Take 8.3g of papermaking sludge dry material pretreated with hydrochloric acid, add 100mL of sodium hydroxide solution with a mass concentration of 18%, stir continuously at room temperature for 45min, filter alkali cellulose with a filter press, and reuse the filtered alkali solution; Add alkali fiber into the reaction bottle, add 120mL of ethanol with a mass concentration of 95% and stir well, then add a solution of 8.9g of monochloroacetic acid and 30mL of ethanol with a mass concentration of 95%, and react at 40°C for 1 hour , heated up to 75°C and reacted for 3 hours; adjusted the pH value to neutral with dilute hydrochloric acid; washed twice with ethanol with a mass concentration of 75%, and washed once with ethanol with a mass concentration of 95%; dried the product, and the waste ethanol solution was distilled back to use; finally the product is dried and pulverized.

Embodiment 2

[0026] Take 1Kg of papermaking sludge dry material pretreated by sulfuric acid, add 12L of sodium hydroxide solution with a mass concentration of 20%, stir continuously at room temperature for 45min, filter alkali cellulose with a filter press, and reuse the lye that is filtered out; Add the alkali fiber into the reaction kettle, add 15L of ethanol with a mass concentration of 95% and stir well, then add a solution mixed with 14Kg of monochloroacetic acid and 4L of ethanol with a mass concentration of 95%, react at 40°C for 1.5 hours, and heat up React at 75°C for 3.5 hours; adjust the pH value to neutral with dilute hydrochloric acid; wash twice with ethanol with a mass concentration of 75%, and wash once with ethanol with a mass concentration of 95%; dry the product, and reuse the waste ethanol solution through distillation; Finally the product is dried and pulverized.

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Abstract

The process of producing sodium caboxymethyl cellulose with papermaking sludge with water content not higher than 80 wt% as material includes pre-treatment of the material, alkalizing, pressure filtering, etherizing, neutralizing, alcohol washing, spin drying, stoving and crushing. The present invention has facile material, waste utilization, low production cost, simple technological process, no secondary pollution and environment friendship.

Description

Technical field: [0001] The invention relates to a production method of sodium carboxymethyl cellulose, in particular to a method for producing sodium carboxymethyl cellulose with papermaking sludge as a raw material. technical background: [0002] The paper industry produces a large amount of sludge in the process of papermaking and wastewater treatment. A processed paper mill with a daily output of 100 tons will produce 300-450 tons of sludge every day, which undoubtedly poses a great pollution hazard to the surrounding environment. Papermaking sludge is difficult to treat. Landfilling and burning are currently the usual methods for pulping and papermaking sludge in my country. It not only consumes money and occupies land, but also causes secondary pollution to soil, groundwater and air. The pulp and papermaking sludge is rich in cellulose, and its main components are: cellulose, hemicellulose, lignin, salt, water and papermaking chemical additives; the sludge produced by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B11/12
Inventor 吴绍祖倪晋仁何霄嘉王玉枝
Owner 北京盖雅技术中心有限公司
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