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A kind of catalytic hydrogenation method that reduces linear alkylbenzene bromide index

A straight-chain alkylbenzene, catalytic hydrogenation technology, applied in chemical instruments and methods, hydrocarbon purification/separation, catalyst activation/preparation, etc. The effect of avoiding environmental pollution, good activity stability, and long stable operation time of the device

Active Publication Date: 2017-12-05
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of this invention is to provide a kind of catalytic hydrogenation method that reduces straight-chain alkylbenzene bromine index, promptly carries out catalytic hydrogenation reaction with transition metal phosphide supported catalyst, reduces the method for straight-chain alkylbenzene bromine index, solves the problem of clay Environmental pollution caused by landfill treatment of refined waste white clay, and the problem of large loss of linear alkylbenzene

Method used

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  • A kind of catalytic hydrogenation method that reduces linear alkylbenzene bromide index
  • A kind of catalytic hydrogenation method that reduces linear alkylbenzene bromide index
  • A kind of catalytic hydrogenation method that reduces linear alkylbenzene bromide index

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: 1% Ni 2 P / γ-Al 2 o 3 Catalyst preparation

[0037] γ-Al 2 o 3 As a carrier (its specific surface area is 296m 2 / g), with Ni(H 2 PO 2 ) 2 ·6H 2 O as nickel source, with Ni(H 2 PO 2 ) 2 ·6H 2 O and NaH 2 PO 2 ·H 2 O as phosphorus source, weigh 10g of γ-Al 2 o 3 Carrier, consisting of 0.4g (1.3478×10 - 3 mol) of Ni(H 2 PO 2 ) 2 ·6H 2 O, 0.43g (4.057×10 -3 mol) of NaH 2 PO 2 ·H 2 O and distilled water to prepare 8.0 mL impregnation solution with nickel and phosphorus concentrations of 1.6848 × 10 -4 mol / mL, 8.4413×10 -4mol / mL, the volume of the impregnation solution is equal to the volume of the maximum adsorption water of the catalyst carrier, and the ratio of nickel and phosphorus atoms in the impregnation solution is 1:5. Carry out impregnation at room temperature according to the equal volume impregnation method, add 8.0mL impregnation solution dropwise to 10g carrier, and keep stirring. After the dropwise addition, it was allow...

Embodiment 2

[0038] Example 2: 5% Ni 2 P / Al 2 o 3 Catalyst preparation

[0039] with Al 2 o 3 Carrier (its specific surface area is 302m 2 / g), Ni(H 2 PO 2 ) 2 ·6H 2 O nickel source, Ni(H 2 PO 2 ) 2 ·6H 2 O and NaH 2 PO 2 ·H 2 O phosphorus source to prepare supported catalyst. Weigh 10g of Al 2 o 3 , consisting of 2.0g (6.739×10 -3 mol) of Ni(H 2 PO 2 ) 2 ·6H 2 O, 1.43g (1.3492×10 -2 mol) of NaH 2 PO 2 ·H 2 O and distilled water to prepare 8.0 mL impregnation solution with nickel and phosphorus concentrations of 8.4238 × 10 -4 mol / mL, 3.3713×10 -3 mol / mL, the volume of the impregnation solution is equal to the volume of the maximum adsorption water of the catalyst carrier, and the ratio of nickel and phosphorus atoms in the impregnation solution is 1:4. Carry out impregnation at room temperature according to the equal volume impregnation method, add 8.0mL impregnation solution dropwise to 10g carrier, and keep stirring. After the dropwise addition, it was allo...

Embodiment 3

[0040] Example 3: 10% Ni 2 P / SiO 2 Catalyst preparation

[0041] Use porous silica gel carrier (its specific surface area is 480m 2 / g), Ni(H 2 PO 2 ) 2 ·6H 2 O nickel source, Ni(H 2 PO 2 ) 2 ·6H 2 O and NaH 2 PO 2 ·H 2 O phosphorus source to prepare supported catalyst. Weigh 10g of porous silica gel, from 4.0g (1.3478 × 10 - 2 mol) of Ni(H 2 PO 2 ) 2 ·6H 2 O, 1.43g (1.3492×10 -2 mol) of NaH 2 PO 2 ·H 2 O and distilled water to prepare 12 mL of impregnation solution with nickel and phosphorus concentrations of 1.1232 × 10 -3 mol / mL, 3.3707×10 -3 mol / mL, the volume of the impregnating solution is equal to the volume of the maximum adsorbed water of the catalyst carrier, and the ratio of nickel and phosphorus atoms in the impregnating solution is 1:3. Carry out impregnation at room temperature according to the equal volume impregnation method, add 12mL impregnation solution dropwise to 10g carrier, and keep stirring. After the dropwise addition, it was ...

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Abstract

The invention discloses a catalytic hydrogenation method for reducing the linear alkylbenzene bromine index. The method is as follows: at a temperature of 60-400°C, a pressure of 0.3-10.0MPa, and a mass space velocity of 0.2-8.0 hours-1, hydrogen Under the condition of oil volume ratio of 300:1~8000:1, the hydrogenation raw material is mixed with hydrogen, and reacted with transition metal phosphide supported catalyst to saturate olefins, thereby reducing the linear alkylbenzene bromide index and improving product quality The raw material for hydrogenation is linear alkylbenzene obtained by distillation and separation of the alkylation mixture of benzene and C10-C14 linear olefins, or the alkylation mixture of benzene and C10-C14 linear olefins; the process flow of the present invention is simple, The catalyst has good activity and stability, and the stable operation time of the device is long, which can avoid the frequent switching operation of reactor reaction and regeneration, the loss of linear alkylbenzene is small, the catalyst can be regenerated, and the post-treatment of a large amount of spent catalyst can be avoided, and the impact on the environment is small.

Description

(1) Technical field [0001] The invention relates to a catalytic hydrogenation method for reducing the bromine index of straight-chain alkylbenzenes, in particular to a method for reducing the bromine index of straight-chain alkylbenzenes by carrying out catalytic hydrogenation reaction with a transition metal phosphide supported catalyst. (2) Background technology [0002] Benzene and C 10 ~C 14 Linear alkylbenzenes produced by the alkylation of linear olefins are the main raw materials for synthetic detergents. At present, UOP's dehydrogenation-HF alkylation process technology is widely used in the industry to produce linear alkylbenzene. The HF alkylation process has problems such as serious equipment corrosion, a large amount of waste liquid and residue, and potential production safety. In order to protect the human living environment, the development of non-corrosive solid acid catalysts and environmentally friendly alkylation processes has attracted widespread attent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C7/163C07C15/107B01J27/185B01J27/19B01J27/188B01J37/02
CPCY02P20/584
Inventor 任杰慎炼袁海宽金辉
Owner ZHEJIANG UNIV OF TECH
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