What's the use of Conaldehyde?

First of all, correct it: furfural, not conaldehyde Furfural is an important organic compound.

Furfural, also known as 2- furaldehyde, is a derivative in which the 2-position hydrogen atom of furan is replaced by aldehyde group. Originally made of rice bran and dilute acid, it was called furfural. Furfural is formed by the hydrolysis of pentosan under the action of acid to generate pentose, and then the pentose is dehydrated and cyclized. The main raw materials for production are agricultural and sideline products such as corncob. There are many synthetic methods. Furfural is the most important derivative of furan ring system with active chemical properties. Many derivatives can be prepared by oxidation, condensation and other reactions, and are widely used in synthetic plastics, medicine, pesticides and other industries.

Main uses of furfural:

Furfural is an important organic chemical product with active chemical properties, which can be made into many derivatives through oxidation, condensation and other reactions. Widely used in synthetic plastics, medicine, pesticides and other industries.

1. Furfural is an excellent organic solvent for refining advanced lubricating oil and diesel oil;

2. Furfural derivatives have high added value. Furfural is the raw material for producing furfuryl alcohol, and furfuryl alcohol is the main raw material for producing furfuryl alcohol resin by hydrogenation under the condition of catalyst.

3. Furfural is a very important organic chemical intermediate, which can be used to prepare pentanediol, acetylpropanol, pentadiene, ketone and methyltetrahydrofuran. 1, 6- hexamethylenediamine [H2n-(CH2) 6-NH2] prepared from furfural is the raw material for preparing nylon 66. Furan made from furfural can also be made into butyraldehyde after electrolytic reduction, which is the raw material for the production of atropine.

4. Many furfural derivatives have strong bactericidal ability;

5. Furfural can replace formaldehyde and condense with phenol under the catalysis of acid or alkali to prepare phenolic resin.

Preparation method of furfural;

one-step method

One-step method is a two-step reaction of pentosan hydrolysis and pentose dehydration to produce furfural, which is completed in the same hydrolysis kettle at one time.

One-step method has been widely used in furfural industry because of its low equipment investment and simple operation. After decades of development, the production technology and process of furfural have been greatly improved, from the initial single-tank cooking to multi-tank series and continuous production technology.

One-step steam consumption is large, furfural yield is low, and a large amount of waste residue is produced. At present, the method of treating waste residue in furfural production plant is mainly to use coal slag mixed combustion technology to generate steam with furfural waste residue as fuel.

Two step method

The two-step method is that pentosan is hydrolyzed at about 100℃ to produce pentose, and then pentose is dehydrated and cyclized at a higher temperature to produce furfural.

In the early 1940s, J.W.Dunning and others studied the two-step preparation process earlier, using a set of continuous equipment, using sulfuric acid as catalyst and corncob as raw material to prepare furfural. After that, many researchers have done a lot of work in this field. In the first step, pentosan is hydrolyzed into pentose under mild conditions, and the process is mature, and the yield of pentose reaches over 95%. The focus of the two-step process research is the second step, that is, the dehydration and cyclization of pentose to produce furfural.

The two-step process is complex, the equipment investment is high, and the technological conditions of the second step dehydration are not very mature, so it has not been widely used in industrial production.

Biomass method

Biomass contains a lot of hemicellulose and cellulose, which can be hydrolyzed by acid to produce furfural or furfural series organic products. Using gasoline or diesel oil to dynamically and directly extract hydrolysis products such as furfural partially dissolved in oil products indirectly increases the available amount of fuel oil and achieves the purpose of "producing" biological liquid fuel oil.

This technology is still in the theoretical experimental stage, and there are still many problems to be solved. If this technology is applied in practice, it can not only solve the problem of biomass utilization in rural areas, but also change the current situation of automobile industry relying on oil, which has great social and economic benefits.

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