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Method for preparing phenolic compound with biomass

A technology of phenolic compounds and biomass, applied in the field of biomass preparation of phenolic compounds, can solve the problems of complex process, serious pollution, high cost, etc., and achieve the effect of improving reaction efficiency and simple process flow

Inactive Publication Date: 2008-10-08
北京瑞增兰宇新能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the invention is to provide a kind of direct preparation of phenolic compounds (using phenol, methyl phenol) by semi-dry biomass in order to overcome the disadvantages of complex technology, large energy consumption, high cost and serious pollution in the prior art. , dimethylphenol, ethylphenol and methylethylphenol-based) method

Method used

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  • Method for preparing phenolic compound with biomass
  • Method for preparing phenolic compound with biomass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Mix 5g corn stalk powder (length 0.180mm) with 0.75ml water uniformly, add it into a 10ml miniature airtight reactor, raise the temperature to 350°C at a heating rate of 30°C / min, and keep it at this temperature for 30 minutes. After the reaction is cooled, the residue is distilled at a temperature of 101-450°C, the product is separated by condensation, the oil phase product is separated and extracted with acetone, and the composition of the extract is analyzed by gas quality online. Phenolic compounds account for 36.21% of the total composition.

[0016] figure 1 It is the chromatographic peak of the obtained liquid product. According to the results of mass spectrometry peak analysis, the main components of phenolic compounds in the obtained liquid phase product are:

[0017] Phenol, 2-methylphenol, 4-methylphenol, 2-ethylphenol, 3,5-dimethylphenol, 4-ethylphenol, 5-methyl-2-ethylphenol, 5-methyl -2-ethylphenol, 5-methyl-3-ethylphenol and 4-methyl-2-ethylphenol.

[0018]...

Embodiment 2

[0020] Mix 300g of cotton straw powder (length 0.150mm) with 60ml of water, and add it to a 2kg / h-level airtight small test device. The screw extruder rotates at 900 rpm, and the temperature is raised to 15℃ / min. At 380°C, it is maintained at this temperature for 40 minutes after the feeding is completed. The residue was distilled in a 100ml closed reactor at a temperature of 25-450°C, the product was separated by condensation, the oil phase product was separated and extracted with acetone, and the composition of the extract was analyzed by gas quality online. Phenolic compounds accounted for 42.97% of the total components.

[0021] figure 2 It is the chromatographic peak of the obtained liquid product. According to the results of mass spectrometry peak analysis, the main components of phenolic compounds in the obtained liquid phase product are:

[0022] Phenol, 2-methylphenol, 4-methylphenol, 2-methoxyphenol, 3,4-dimethylphenol, 3-ethylphenol, 4-methyl-2-methoxyphenol, 4- Ethyl-...

Embodiment 3

[0025] Mix 5g wheat straw powder (length 0.180mm) with 1ml water uniformly, add it to a 10ml miniature airtight reactor, raise the temperature to 370°C at a heating rate of 30°C / min, and keep it at this temperature for 30 minutes. After the reaction is cooled, the residue is distilled at a temperature of 100 to 430°C, the product is separated by condensation, the oil phase product is separated and extracted with acetone, and the composition of the extract is analyzed by gas quality online. Phenolic compounds account for 33.05% of the total composition.

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Abstract

The invention relates to the biomass comprehensive utilization technique field, in particular relates to a method for preparing a phenolic compound by a biomass. Water is added to a biomass vegetable material undergoing smashing and filtration which is added to a closed reaction kettle or a reactor after being mixed evenly, the reaction kettle or the reactor is heated at a heat rise rate of between 5 and 50 DEG C / min and a reaction temperature of between 300 and 500 DEG C, the mixture is maintained under the reaction temperature for fifteen to sixty minutes, the dregs are distilled after the substance under reaction is cooled down, the product is separated through the condensation, an oil phase product is separated and extracted by acetone so as to obtain the phenolic compound. The method of preparation has a simple technical process and converts the biomass into the phenolic compound (chiefly phenol, methylphenol, xylenol, ethyl phenol and methyl ethyl phenol) directly through controlling the reaction conditions.

Description

Technical field [0001] The invention relates to the technical field of comprehensive utilization of biomass, and particularly relates to a method for preparing phenolic compounds (mainly phenol, methyl phenol, dimethyl phenol, ethyl phenol and methyl ethyl phenol) from biomass. Background technique [0002] Phenol (commonly known as carbolic acid) is an important organic chemical raw material and one of the important derivatives of propylene. It is mainly used to produce phenolic resin, caprolactam, bisphenol A, adipic acid, aniline, alkylphenol, salicylic acid, etc. In addition, it can also be used as solvents, reagents and disinfectants, etc. It has a wide range of applications in synthetic fibers, synthetic rubber, plastics, medicine, pesticides, perfumes, dyes and coatings. [0003] Before the First World War, phenol was mainly extracted from coal tar. With the increasing demand for phenol, people began to use chemical synthesis to produce phenol. The earliest phenol chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/00C07C37/68C07C39/02
Inventor 杨正宇李金花郭仕鹏王超
Owner 北京瑞增兰宇新能源科技有限公司
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