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Method for producing furol by plant stalk pelletizing

A technology of plant straw and plant straw powder, applied in the direction of organic chemistry, can solve problems such as air pollution, and achieve the effects of fast granulation, easy storage, and steam saving.

Inactive Publication Date: 2006-11-08
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for producing furfural by granulating plant straws, which solves the above four problems in the production of furfural by directly pulverizing plant straws, and at the same time solves the air pollution caused by burning plant straws in some areas question

Method used

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  • Method for producing furol by plant stalk pelletizing

Examples

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Embodiment 1

[0023] The raw material is corncobs air-dried in spring, and its water content is 23%. After the corncob is dedusted by the vibrating screen, it is crushed into 1-1.5cm corncob particles by a hammer mill, and then transported by the elevator to the acid mixing truck for acid mixing. The catalyst uses dilute sulfuric acid, and the concentration of dilute acid is 5-10%. , the amount of acid used is kept at a specific solid-liquid ratio of 1:0.5, and it is sent into the hydrolysis kettle through a belt conveyor. The volume of the hydrolysis kettle is 10 cubic meters, and the filling density of corncobs is 150-180kg / m 3 , using double tanks in series operation, after filling the hydrolysis tank, feed water vapor with a pressure of 0.45-0.75MPa, the hydrolysis temperature is 145-180°C, and the hydrolysis takes 2 hours to 4 hours. The furfural stock solution obtained by hydrolysis is introduced into the subsequent process, and the gross aldehyde is extracted, and the furfural is con...

Embodiment 2

[0025] 1) Process the corn stalks into 2-4cm granule segments, then strictly control the moisture content of the granule segments at 27%, and crush the granule segments into plant straw powders with a diameter of 0.5-1mm with a pulverizer;

[0026] 2) To control the moisture content of corn stalk powder, use a granulator to granulate it into straw granules with a diameter of 5-10mm at a compression ratio of 1:5. The bulk density of corn stalk after granulation is 300-420kg / m 3 ;

[0027] 3), transported by the elevator to the acid mixing machine for acid mixing, the catalyst uses dilute sulfuric acid, so that the ratio of the mass of dilute acid and raw material moisture to the mass of absolute dry raw material, that is, the ratio of liquid to solid, is 1:0.8, and the concentration of dilute acid is maintained 8-20%, mix evenly in the acid mixer so that the acid solution penetrates into the straw particles and then put it into the hydrolysis kettle, and feed water vapor with a...

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Abstract

The plant stalk pelletizing process for producing furol belongs to the field of furol preparing technology. The process includes the following steps: cutting plant stalk into 2-4 cm long segments, controlling water content, crushing into powder, pelletizing, mixing with acid, hydrolysis to raw furol liquor, leading the raw furol liquor to the primary distillation tower to obtain raw furol and refining in a furol refining apparatus to obtain furol product. The production process is stable, reliable, low in production cost, high in furol yield and high in furol quality.

Description

technical field [0001] The invention relates to the field of furfural preparation, in particular to a method for preparing furfural by granulating plant stalks. Background technique [0002] Furfural is an organic chemical product that has not been synthesized from chemical raw materials but can only be extracted from plant materials such as agricultural waste. Furfural is an excellent selective solvent and a raw material for the production of various furan compounds. It is widely used in foundry binder, tetrahydrofuran, lubricating oil refining, organic synthesis, plastics, medicine, chemical anticorrosion, etc. [0003] Furfural has long been industrialized and mass-produced in the world. There are many production methods, but most of them adopt direct method. The direct method is to put the raw material containing polypentose into a hydrolysis kettle, and under the action of catalyst-sulfuric acid and heat, the polypentose is hydrolyzed into pentose, and at the same tim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/50C07D307/48
Inventor 唐一林赵新华焦丽柴会新王拥政魏丙栋江成真
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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