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Method for preparing pentadecylcyclohexane and pentadecylbenzene with cardanol as raw material

A technology of pentadecylbenzene and pentadecyl, which is applied in the field of industrial catalysis, can solve the problems of many by-products and three wastes, high cost of raw materials, low selectivity of target products, etc., and achieves increased catalyst dosage, production process and operation. The effect of simplicity and excellent catalytic activity

Active Publication Date: 2019-07-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above-mentioned prior art for preparing pentadecylcyclohexane and pentadecylbenzene always has some problems of one kind or another, such as more by-products and three wastes, lower selectivity of target products, higher cost of raw materials, etc.

Method used

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  • Method for preparing pentadecylcyclohexane and pentadecylbenzene with cardanol as raw material
  • Method for preparing pentadecylcyclohexane and pentadecylbenzene with cardanol as raw material
  • Method for preparing pentadecylcyclohexane and pentadecylbenzene with cardanol as raw material

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Embodiment approach

[0031] According to some embodiments of the present invention, the method of the present invention comprises the following steps:

[0032] Step A, add 20-40 purpose Pt / Al in the tubular reactor 2 o 3 The granular solid catalyst constitutes a fixed-bed reactor;

[0033] Step B, placing the fixed-bed reactor with the catalyst in a tubular heating furnace, heating to 300-400°C in a nitrogen atmosphere, performing nitrogen treatment for 1-2 hours, and removing the air in the reactor;

[0034] Step C, at a flow rate of 100-120ml / min, preferably at a flow rate of 100ml / min, hydrogen is passed into a fixed-bed reactor equipped with a catalyst treated with nitrogen, so that the pressure reaches 3.0-4.0MPa;

[0035] Step D, after the temperature and pressure are stabilized, take 2.4-2.6h -1 The space velocity, preferably at 2.4h -1 The space velocity, and with the flow velocity of 0.2-0.4ml / min, preferably with the flow velocity of 0.2ml / min, cardanol is sent in the hydrogen gas fl...

Embodiment 1

[0038] Embodiment 1: Prepare pentadecylcyclohexane and pentadecylbenzene with cardanol as raw material:

[0039] (1) Add 5 grams of 20-40 mesh Pt / Al to the tubular reactor 2 o 3 The granular solid catalyst constitutes a fixed-bed reactor;

[0040] (2) Place the fixed-bed reactor with the catalyst in a tubular heating furnace, heat up to 400°C in a nitrogen atmosphere, and carry out nitrogen treatment for 1-2 hours to remove the air in the reactor;

[0041] (3) feed hydrogen with the flow velocity of 100ml / min in the fixed-bed reactor that catalyst is housed through nitrogen treatment, make pressure reach 3.5MPa;

[0042] (4) After the temperature and pressure are stabilized, the material pump is used for 2.4h -1 The space velocity of cardanol and the flow rate of 0.2ml / min are sent into the hydrogen flow formed by hydrogen, and the gas-liquid mixture formed after mixing enters the fixed-bed reactor equipped with catalyst, and reacts at a temperature of 400°C to form ten Pe...

Embodiment 2

[0043] Embodiment 2: Prepare pentadecylcyclohexane and pentadecylbenzene with cardanol as raw material:

[0044] (1) Add 5 grams of 20-40 mesh Pt / Al to the tubular reactor 2 o 3 The granular solid catalyst constitutes a fixed-bed reactor;

[0045] (2) Place the fixed-bed reactor with the catalyst in a tubular heating furnace, heat up to 400°C in a nitrogen atmosphere, and carry out nitrogen treatment for 1-2 hours to remove the air in the reactor;

[0046] (3) feed hydrogen with the flow velocity of 100ml / min in the fixed-bed reactor that catalyst is housed through nitrogen treatment, make pressure reach 3.0MPa;

[0047] (4) After the temperature and pressure are stabilized, the material pump is used for 2.4h -1 The space velocity and the flow rate of 0.2ml / min send cardanol into the hydrogen flow formed by hydrogen, and the gas-liquid mixture formed after mixing flows into a fixed-bed reactor equipped with a catalyst, and reacts at a temperature of 400°C to form Pentadecylc...

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Abstract

The invention relates to a method for preparing pentadecyl cyclohexane and pentadecyl benzene from cardanol. The method comprises the following steps: carrying out nitrogen treatment on a fixed-bed reactor filled with a Pt / Al2O3 granular solid catalyst; introducing hydrogen into the catalyst-filled fixed-bed reactor subjected to nitrogen treatment; sending cardanol into a hydrogen stream formed by hydrogen, sending the gas-liquid mixture into the catalyst-filled fixed-bed reactor, and carrying out reaction to generate the pentadecyl cyclohexane and pentadecyl benzene. The granular solid catalyst Pt / Al2O3 has excellent catalytic activity, catalytic stability and carbon deposit resistance, and is renewable and recyclable. The amount of byproducts and three wastes in the production process is small, and the target product selectivity is higher. The method has higher product yield. The method is simple in production technique and operation, only needs one-step reaction, and thus, is especially beneficial to industrial production.

Description

technical field [0001] The invention belongs to the field of industrial catalysis, and in particular relates to a method for preparing pentadecylcyclohexane and pentadecylbenzene by using cardanol as a raw material. Specifically, it relates to a method for preparing pentadecylcyclohexane and pentadecylbenzene in a fixed-bed hydrogenation reactor using cardanol as a raw material. Background technique [0002] Pentadecylcyclohexane is an important organic chemical raw material intermediate, and can also be used as a liquid alkane fuel. At present, the production of pentadecylcyclohexane is mainly through the method of organic synthesis. [0003] Pentadecylbenzene is an important part of linear alkylbenzene (or linear alkylbenzene, LAB), and is also an important aromatic organic chemical raw material for the production of surfactants and synthetic detergents. LAB is mainly used for Manufacture of linear alkylbenzene sulfonate (LAS) synthetic detergents, LAS has become the mos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/20C07C13/18C07C15/107B01J23/42
CPCB01J23/42C07C1/20C07C13/18C07C15/107
Inventor 陈必强孟达方云明王晨曦
Owner BEIJING UNIV OF CHEM TECH