Preparation method and application of ionic compound solution

A technology of ionic compounds and compounds, applied in organic chemistry, textiles and papermaking, fiber raw material processing, etc., can solve the problems of high cost of dissolved biomass, difficult recycling of solutions, complicated process, etc., and achieve low price, low viscosity, synthetic The effect of simple process

Active Publication Date: 2015-07-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, the object of the present invention is to overcome the deficiencies such as the high cost of dissolving biomass in the existing ionic liquid technology, complex process, difficult solution recycling, environmental pollution, etc., to provide a kind of ionic compound solution and its preparation method, and to be used for biomass, especially The dissolution and degradation of lignocellulose can be further widely used in pulp preparation, cellulose purification, further chemical production of cellulose, hemicellulose and lignin, etc.

Method used

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  • Preparation method and application of ionic compound solution
  • Preparation method and application of ionic compound solution
  • Preparation method and application of ionic compound solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Add 45.64g DBU and 28.84g methanol (i.e. molar ratio 1:3) into a 250ml round-bottomed flask, and pass into it dry CO 2 , react for 4h, get DBU / CH 3 OH / CO 2 The methanol solution of the ionic compound, and then add a certain amount of methanol to make 120ml of 2.5mol / L DBU / CH 3 OH / CO 2 methanol solution.

[0054] (2) Add 120ml of 2.5mol / L DBU / CH 3 OH / CO 2 Methanol solution and 5.00g of dried camphor sawdust through a 60-mesh sieve were added to the autoclave, and the CO 2 , so that the pressure is around 2MPa. Start stirring at 500r / min, heat to 180°C, and keep the pressure inside the kettle at about 4MPa. After the temperature stabilized, start timing and dissolve for 2 hours. Then, the mixture is filtered, and the filtrate can be circulated back to the autoclave for recycling according to the above method, and the filter residue is the residue after the sawdust is dissolved. Carry out chemical analysis to the content of each component in the residue (speci...

Embodiment 2

[0056] The operation steps of Example 1 were repeated, except that methanol was replaced by water. The results are shown in Table 1.

Embodiment 3

[0058] Repeat the operating steps of Example 1, the difference is that the camphor wood chips used in step (2) contain 7% water. The results are shown in Table 1.

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Abstract

The invention provides an ionic compound solution and a preparation method thereof. The method comprises the following steps: mixing a compound as shown in a formula I which is described in the specification with alcohol and/or water; and introducing acidic gas so as to obtain the ionic compound solution; wherein, in the formula, R1, R2, R3 and R4 are independently selected from C1-C8 straight-chain or branched-chain alkyl groups, and R1 and R2 and/or R3 and R4 are optionally bonded to form a ring. The invention also provides a method for dissolving biomass with the prepared ionic compound solution. The ionic compound solution is applicable to purification of cellulose and further transformation and utilization of cellulose, hemicellulose and lignin. Due to usage of cheap raw materials and easy recycling of the solution, the method is a promising biomass dissolving and degrading method.

Description

technical field [0001] The invention relates to the technical field of separation of biomass components, in particular to an ionic compound solution and a preparation method thereof, as well as its application in the dissolution and degradation of biomass. Background technique [0002] Biomass, in a narrow sense, mainly refers to straw, trees and other lignocellulose, agricultural and forestry waste, etc. in the process of agricultural and forestry production except grain and fruit. It is a renewable carbon resource that can be converted into conventional liquid fuels and other chemical raw materials. Or products that utilize technologies that are largely compatible with the way fossil fuels are utilized. Biomass raw materials mainly contain cellulose, hemicellulose, lignin, etc., and the three are combined into a complex polymer structure by covalent bonds, hydrogen bonds, etc., making it difficult to dissolve and degrade, increasing biomass as the most abundant Difficulty...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D487/04D21C5/00C08H7/00
CPCC07D487/04C08H8/00D21C5/00
Inventor 鲁厚芳梁斌张惠忠刘颖颖
Owner CHINA PETROLEUM & CHEM CORP
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