Production process for lignin alcohol fuel

Abstract

The invention relates to a production process for lignin alcohol fuel, in particular a process for preparing lignin mellow wine liquid clean fuel by using boiling residual liquid obtained in ethanol method pulping.

Description

1. Technical field

[0001] The invention relates to a lignin alcohol fuel manufacturing process, in particular to a process for producing a liquid clean fuel by using the cooking raffinate obtained from ethanol papermaking and pulping as a main raw material. The invention belongs to the technical field of papermaking and pulping. 2. Background technology

[0002] Ethanol pulping technology is considered to be one of the most promising clean paper pulping technologies. However, this technology uses a large amount of ethanol aqueous solution to dissolve organic substances such as lignin in the fiber raw material, and generates a large amount of pulping and cooking raffinate while performing fiber separation. In the previous cooking raffinate treatment process, there were problems such as high energy consumption for ethanol recovery and immature technology for efficient utilization of by-product lignin, which affected the further improvement of the economic benefits of pulping ...

Examples

Embodiment Construction

[0006] Pump the ethanol paper pulping raffinate (temperature at 75-200°C) in the storage tank into the clarifier, and add CaO or Ca(HO) 2 , so that the pH value of the liquid is between 6.5 and 7.5; then add 3 to 35% (by liquid mass) lignin and an appropriate amount of additives and fully stir, and keep warm for 20 to 60 minutes to neutralize the acetic acid in the raw material and generate acetic acid Then, cool it to room temperature and let it stand for 12 to 48 hours to precipitate and separate most of the insoluble substances; finally filter the clear liquid to remove fine solid substances such as calcium acetate, fine fibers and dust contained therein, The resulting homogeneous liquid is clean lignin alcohol liquid fuel.

1. Technical field

[0001] The invention relates to a lignin alcohol fuel manufacturing process, in particular to a process for producing a liquid clean fuel by using the cooking raffinate obtained from ethanol papermaking and pulping as a main raw material. The invention belongs to the technical field of papermaking and pulping. 2. Background technology

[0002] Ethanol pulping technology is considered to be one of the most promising clean paper pulping technologies. However, this technology uses a large amount of ethanol aqueous solution to dissolve organic substances such as lignin in the fiber raw material, and generates a large amount of pulping and cooking raffinate while performing fiber separation. In the previous cooking raffinate treatment process, there were problems such as high energy consumption for ethanol recovery and immature technology for efficient utilization of by-product lignin, which affected the further improvement of the economic benefits of pulping ...

Examples

Embodiment Construction

[0006] Pump the ethanol paper pulping raffinate (temperature at 75-200°C) in the storage tank into the clarifier, and add CaO or Ca(HO) 2 , so that the pH value of the liquid is between 6.5 and 7.5; then add 3 to 35% (by liquid mass) lignin and an appropriate amount of additives and fully stir, and keep warm for 20 to 60 minutes to neutralize the acetic acid in the raw material and generate acetic acid Then, cool it to room temperature and let it stand for 12 to 48 hours to precipitate and separate most of the insoluble substances; finally filter the clear liquid to remove fine solid substances such as calcium acetate, fine fibers and dust contained therein, The resulting homogeneous liquid is clean lignin alcohol liquid fuel.