Method for simultaneously preparing p-cymene and rosin-based biodiesel by taking rosin as raw material

A technology for cymene and biodiesel, applied in the field of deep processing of turpentine, can solve the problems such as the research report on cymene and turpentine-based biodiesel that have not yet been seen, and achieve the effects of reproducible toxic gas, simple equipment and mild reaction conditions

Inactive Publication Date: 2017-07-28
南宁市青秀区嘉利林化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In summary, people have done a lot of work on the disproportionation reaction research and application of rosin, but there is no research report on the simultaneous preparation of p-cymene and rosin-based biodiesel with rosin as raw material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take a certain amount of crude turpentine and put it into the mixture of dichloromethane and acetonitrile, the mass ratio of turpentine, dichloromethane and acetonitrile is 1:1.1:2, heat and stir in a water bath to dissolve, filter to remove impurities, and obtain a clean rosin solution. Put a certain amount of bentonite through a 200-mesh sieve in the container, add 4.7 times the amount of 2mol L -1 H 2 SO 4 solution, heated in a water bath to 90°C, stirred at a speed of 160r / min for 2h, centrifuged, discarded the supernatant, added distilled water to stir and centrifuged, repeated the operation until the supernatant was neutral, dried and ground through a 200-mesh sieve to obtain the acid modified Sexual bentonite. Add the net turpentine liquid and the acid-modified bentonite to the reactor in a ratio of 10:1, and feed neon gas at a flow rate of 200L / h for protection, stir with a mechanical stirrer at a speed of 310r / min, and raise the temperature to 245°C, during ...

Embodiment 2

[0033] Take a certain amount of crude turpentine and put it into the mixture of dichloromethane and acetonitrile, the mass ratio of turpentine, dichloromethane and acetonitrile is 1:1.3:2, heat and stir in a water bath to dissolve, filter to remove impurities, and obtain a clean rosin solution. Put a certain amount of bentonite through a 200-mesh sieve in the container, add 4.5 times the amount of 2mol L -1 H 2 SO 4 solution, heated in a water bath to 85°C, stirred at a speed of 150r / min for 2h, centrifuged, discarded the supernatant, added distilled water to stir and centrifuged, repeated the operation until the supernatant was neutral, dried and ground through a 200-mesh sieve to obtain acid modified Sexual bentonite. Add the net turpentine liquid and the acid-modified bentonite to the reactor in a ratio of 11:1, and feed neon gas at a flow rate of 230L / h for protection, stir with a mechanical stirrer at a speed of 380r / min, and raise the temperature to 250°C, during whic...

Embodiment 3

[0036] Take a certain amount of crude turpentine and put it into the mixture of dichloromethane and acetonitrile. The mass ratio of turpentine, dichloromethane and acetonitrile is 1:1.5:2, heat and stir in a water bath to dissolve, filter to remove impurities, and obtain a clean rosin solution. Put a certain amount of bentonite through a 200-mesh sieve in the container, add 4.8 times the amount of 2mol L -1 H 2 SO 4solution, heated in a water bath to 95°C, stirred at a speed of 160r / min for 2h, centrifuged, discarded the supernatant, added distilled water to stir and centrifuged, repeated the operation until the supernatant was neutral, dried and ground through a 200-mesh sieve to obtain acid modified Sexual bentonite. Add the net turpentine liquid and acid-modified bentonite to the reactor at a ratio of 7:1, and pass through xenon gas at a flow rate of 260L / h for protection, stir with a mechanical stirrer at a speed of 350r / min, and raise the temperature to 240 ℃, during w...

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PUM

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Abstract

The invention discloses a method for simultaneously preparing p-cymene and rosin-based biodiesel by taking rosin as a raw material, and belongs to the field of chemical raw material preparation. The preparation method mainly includes the processes of rosin dissolution, reaction, separation and suction filtration. The rosin is dissolved by solvents, catalysts are added after filtration, inert gas is led in to perform protection, temperature is controlled to range from 240 DEG C to 250 DEG C, disproportionating-cracking reaction is performed under the action of a mechanical stirrer for 100-115 minutes, a water segregator is continuously used for separating low-boiling-point liquid from water during reaction, the water is removed, low-boiling-point liquid p-cymene can be obtained, a reaction product remains after reaction and is cooled to 65-75 DEG C, the catalysts are removed by suction filtration to obtain light yellow low-viscosity liquid oily matters, and the rosin-based biodiesel can be obtained. The method is simple in production process flow, high in efficiency, short in reaction time and simple and convenient to operate, and two products can be simultaneously obtained.

Description

technical field [0001] The invention relates to the field of turpentine deep processing, in particular to a method for simultaneously preparing p-cymene and rosin-based biodiesel from turpentine. Background technique [0002] Pine resin is the resin secreted by the trunk of pine trees after being injured, and it is a solution of resin acid dissolved in terpene. The research and development of turpentine has gone through a process from direct utilization of raw materials, reprocessed products to finely processed products, and has become an important industrial raw material with a wide range of uses. P-cymene is an important organic chemical raw material, which can be used in soft drinks, iced foods, candies, chewing gum, and seasonings; it can also be used to synthesize a variety of polycyclic musk fragrances, such as cymene musk, powdered sandalwood musk and tona musk Wait, very practical value. The traditional preparation method of p-cymene is prepared from the petrochemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C4/08C07C15/02C10L1/02
CPCC07C4/08C10L1/02C07C15/02Y02E50/10
Inventor 谭伯堪陆文刚
Owner 南宁市青秀区嘉利林化有限公司
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