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Catalyst based on carbonized polyurethane material, preparation method of catalyst and method for preparing cyclopentanone by using catalyst

A technology of polyurethane materials and catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as catalyst deactivation and product yield decline, and achieve Effects of large specific surface area, water and thermal stability, excellent catalytic activity and stability

Active Publication Date: 2018-08-10
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In summary, because furfural and furfuryl alcohol are easy to polymerize (resinize) in a high temperature environment, the catalyst is quickly deactivated in the existing method, and the product yield decreases

Method used

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  • Catalyst based on carbonized polyurethane material, preparation method of catalyst and method for preparing cyclopentanone by using catalyst
  • Catalyst based on carbonized polyurethane material, preparation method of catalyst and method for preparing cyclopentanone by using catalyst
  • Catalyst based on carbonized polyurethane material, preparation method of catalyst and method for preparing cyclopentanone by using catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10

[0043] In Examples 1-10, different metal soluble salts and polyurethane materials were used to prepare catalysts 1#-10# according to the following steps.

[0044] Weigh an appropriate amount of polyurethane material, put it into a tube furnace after crushing, and calcine at the calcination temperature given in Table 1 for 4 hours in a nitrogen atmosphere, and take it out after cooling down to room temperature to obtain a carbonized polyurethane material carrier.

[0045] The carbonized polyurethane material is ground into 100~1000 mesh powders, joins in the metal soluble saline solution containing active component of equal volume (embodiment 1-10 metal soluble salt is successively nickel nitrate, cobalt acetate, copper nitrate, ruthenium chloride , rhodium chloride, palladium chloride, chloroiridic acid, chloroplatinic acid, silver nitrate and chloroauric acid), impregnated for 12h, then dried at 120°C for 24h to obtain a catalyst based on carbonized polyurethane material (cata...

Embodiment 11～20

[0051] Batch kettle

[0052] Embodiment 11-20 is carried out in batch kettle reactor, and batch kettle reactor volume is 3000mL, and material is stainless steel, respectively adopts the 1#-10# catalyst of embodiment 1-10 to prepare cyclopentanone, and raw material furfuryl alcohol is prepared as Furfuryl alcohol aqueous solution or pure furfuryl alcohol.

[0053] Catalyst carries out in-situ reduction in hydrogen: a certain amount of catalyzer is added in above-mentioned batch tank reactor, and the mass percent of the add-on of catalyzer is shown in table 2 with respect to the furfuryl alcohol (furfuryl alcohol aqueous solution in solute meter) to be hydrogenolyzed, The reduction temperature is 200°C, and H is used per 100g of catalyst 2 Flow rate 1.5L / min, H 2 The pressure was 0.3 MPa (gauge pressure), and the catalyst was reduced in situ for 4 hours to activate it.

[0054] Preparation of cyclopentanone: After the catalyst reduction is completed, lower the reaction kettle...

Embodiment 21～30

[0060] fixed bed

[0061] Examples 21-30 were carried out in a fixed bed reactor. The reactor was a stainless steel tube with an outer diameter of 40mm, an inner diameter of 20mm, and a length of 1000mm. The catalysts 1#-10# prepared in Examples 1-10 were used to prepare cyclopentanone.

[0062] The raw material furfuryl alcohol is prepared as furfuryl alcohol aqueous solution or pure furfuryl alcohol before use.

[0063] In situ reduction of the catalyst in hydrogen: 50g of the catalyst is loaded into the reactor, the catalyst is reduced in situ before the reaction, the reduction temperature is 200°C, H 2 The pressure is 0.3MPa, H 2 Flow rate 1.5L / min, reduction 4h.

[0064] Preparation of cyclopentanone: after catalyst reduction, lower to reaction temperature, set hydrogen / catalyst volume space velocity to 1000h -1 , adjust the furfuryl alcohol aqueous solution (or pure furfuryl alcohol) flow rate to the required furfuryl alcohol (in the furfuryl alcohol aqueous solution ...

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Abstract

The invention relates to a catalyst based on a carbonized polyurethane material, a preparation method of the catalyst and a method for preparing cyclopentanone by using the catalyst. By using polyurethane, particularly waste polyurethane materials are used for preparing a porous nitrogen-containing carbon material by a carbonization method; the high-value utilization of the polyurethane waste canbe realized by using the porous nitrogen-containing carbon material as a carrier preparation catalyst; meanwhile, the catalyst expresses the excellent catalyst activity and stability in the reaction for preparing cyclopentanone through furfuryl alcohol re-arrangement hydrogenation; the furfuryl alcohol conversion rate is greater than 99 percent; the cyclopentanone selectivity is greater than 95 percent; the catalyst can be cyclically used for 20 times or above without inactivation; through the long-time continuous service life investigation, the performance is not obviously changed; the wholeprocess production cost is greatly reduced.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst based on carbonized polyurethane material and a preparation method thereof. The invention also relates to a method for preparing cyclopentanone by using the catalyst and using furfuryl alcohol as a raw material. Background technique [0002] Cyclopentanone is an important fine chemical intermediate, and also a raw material for the perfume and pharmaceutical industries. It can be used to prepare new spices such as methyl dihydrojasmonate, brandy ketone, 2-n-hexylcyclopentanone and various anti-inflammatory, Anticancer drugs can also be used to synthesize rubber, and are also used in biochemical research, synthesis of insecticides and herbicides. [0003] There are mainly two traditional methods for the preparation of cyclopentanone, namely high-temperature pyrolysis of adipic acid and its derivatives and oxidation of cyclopentene. The high-temperature pyrolysis of adipic acid and its der...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/44B01J23/46B01J23/50B01J23/52B01J23/72B01J23/745B01J23/75C07C45/59C07C49/403
CPCB01J23/42B01J23/44B01J23/462B01J23/464B01J23/468B01J23/50B01J23/52B01J23/72B01J23/745B01J23/75C07C45/59C07C2601/08C07C49/403
Inventor 胡江林刘运海王磊黎源杨恒东曾伟丁可王坤宋延方杨洋陈永
Owner WANHUA CHEM GRP CO LTD
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