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Catalytic hydrogenation preparation method of saturated cardanol

A technology for catalytic hydrogenation and cardanol, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as self-polymerization, and achieve the effects of reducing hydrogenation time, good reusability, and wide sources

Active Publication Date: 2022-06-14
SHE COUNTY JINDONG ECONOMIC & TRADE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The basic structure of cardanol is as figure 1 As shown, high-temperature distillation is often used to refine cardanol at present, but it has the following problems: (1) Since cardanol has a high boiling point but self-polymerizes at high temperatures, cashew nuts with greater unsaturation when heated The easier the phenol is to undergo thermal polymerization, it becomes a polymer and cannot be evaporated, so the distillation yield can only be maintained at about 46%.

Method used

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  • Catalytic hydrogenation preparation method of saturated cardanol
  • Catalytic hydrogenation preparation method of saturated cardanol
  • Catalytic hydrogenation preparation method of saturated cardanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Feeding:

[0033] Cardanol, methanol and platinum carbon were sequentially added to the reaction kettle according to the mass ratio of 1:1.5:0.05.

[0034] (2) Nitrogen and hydrogen replacement:

[0035] First, replace the gas in the reactor with nitrogen three times, and then replace the gas in the reactor with hydrogen three times.

[0036] (3) Hydrogenation reaction:

[0037] When heated to 60°C at a heating rate of 1°C / min under stirring, pressurize hydrogen to 1.0Mpa, and continue to heat to 70°C at a heating rate of 1°C / min while the pressure remains unchanged. At this time, the pressure was increased to 1.5MPa by introducing hydrogen, and continued to heat to 85°C at a heating rate of 0.5-1°C / min under this pressure. Then, the pressure was increased to 2.0MPa by introducing hydrogen, and stirring was continued for 1.5 hours.

[0038] (4) Separation:

[0039] After the solution in the kettle reclaims the hydrogenation catalyst through the filter, it is tra...

Embodiment 2

[0041] (1) Feeding:

[0042] According to the mass ratio of 1:1.3:0.02, cardanol, ethanol and platinum carbon were sequentially added to the reaction kettle.

[0043] (2) Nitrogen and hydrogen replacement:

[0044] First, replace the gas in the reactor with nitrogen three times, and then replace the gas in the reactor with hydrogen three times.

[0045] (3) Hydrogenation reaction:

[0046] When heated to 60°C at a heating rate of 1°C / min under stirring, pressurize hydrogen to 1.0Mpa, and continue to heat to 70°C at a heating rate of 1°C / min while the pressure remains unchanged. At this time, the pressure was increased to 1.5MPa by introducing hydrogen, and continued to heat to 85°C at a heating rate of 0.5-1°C / min under this pressure. Then, the pressure was increased to 2.0MPa by introducing hydrogen, and stirring was continued for 1.5 hours.

[0047] (4) Separation:

[0048] After the solution in the kettle reclaims the hydrogenation catalyst through the filter, it is tra...

Embodiment 3

[0050] (1) Feeding:

[0051] Cardanol, methanol and platinum carbon were sequentially added to the reaction kettle in a mass ratio of 1:1.1:0.01.

[0052] (2) Nitrogen and hydrogen replacement:

[0053] First, replace the gas in the reactor with nitrogen three times, and then replace the gas in the reactor with hydrogen three times.

[0054] (3) Hydrogenation reaction:

[0055] When heated to 60°C at a heating rate of 1°C / min under stirring, pressurize hydrogen to 1.0Mpa, and continue to heat to 70°C at a heating rate of 1°C / min while the pressure remains unchanged. At this time, the pressure was increased to 1.5MPa by introducing hydrogen, and continued to heat to 85°C at a heating rate of 0.5-1°C / min under this pressure. Then, the pressure was increased to 2.0MPa by introducing hydrogen, and stirring was continued for 1.5 hours.

[0056] (4) Separation:

[0057]After the solution in the kettle reclaims the hydrogenation catalyst through the filter, it is transferred to t...

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Abstract

The invention relates to a catalytic hydrogenation preparation method of saturated cardanol. The method comprises the following steps: feeding: sequentially adding cardanol, a solvent and a hydrogenation catalyst into a reaction kettle; nitrogen and hydrogen replacement: firstly replacing gas in the reaction kettle with nitrogen for three times, and then replacing gas in the reaction kettle with hydrogen for three times; hydrogenation reaction: heating to 60-85 DEG C under a stirring condition, pressurizing to 1.0-2.0 MPa by using hydrogen, and then continuously stirring for a period of time; and separation: recovering the hydrogenation catalyst from the solution in the kettle through a recovery device, crystallizing, centrifuging and drying to obtain saturated cardanol. The method is simple and convenient in preparation mode, energy consumption is reduced, and the prepared saturated cardanol is high in purity.

Description

technical field [0001] The invention relates to the technical field of preparation of organic polymer compounds, in particular to a method for preparing saturated cardanol by catalytic hydrogenation. Background technique [0002] Cardanol, light yellow liquid, English name cardanol, can be extracted from natural cashew nut shell liquid by advanced technology, contains a large amount of active one-component phenol and a small amount of diphenol, is a very rare natural biomass phenol It has a wide range of uses and outstanding environmental protection properties, and is also the cheapest, easiest and most realistic biomass polymer raw material that can be put into use. [0003] The basic structure of cardanol is figure 1 As shown, high-temperature distillation is often used to purify cardanol, but it has the following problems: (1) Since cardanol has a high boiling point but can self-aggregate at high temperatures, the higher the degree of unsaturation in cashew nuts when hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/00C07C37/68C07C37/84C07C39/06
CPCC07C37/003C07C37/685C07C37/84C07C39/06Y02P20/584
Inventor 刘东东刘俊成刘晓张迪詹石玉樊靖华南彦冬徐志勇
Owner SHE COUNTY JINDONG ECONOMIC & TRADE CO LTD
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