Organic amber and preparation method thereof

A technology of organic succinic acid and succinic acid, which is applied in the field of gemstones to achieve the effects of easy operation, low cost and simple synthesis method

Inactive Publication Date: 2014-08-06
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are no related research literatures and invention patent reports on the synthesis of organic compounds with basically the same chemical composition starting from the chemical composition of natural amber itself.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: the preparation method of organic amber, concrete operations are as follows:

[0023] Pour succinic acid powder into the crucible, then add phthalic anhydride powder, mix the two thoroughly, then add glycerin, stir evenly, wherein the molar ratio of succinic acid: glycerol: phthalic anhydride is 1:1:1 , then slowly raise the temperature from room temperature to 160°C at a heating rate of 5°C / min, and hold for 3 hours for pre-firing; finally, slowly raise the temperature at a rate of 3°C / min from 160°C to 200°C, and hold for 3 hours for curing, and the curing is complete After cooling down to room temperature naturally, take it out to get organic amber.

[0024] The organic amber produced with this ratio has a refractive index of 1.55 and a density of 1.11. It is weak blue-green under long and short ultraviolet fluorescence, and its appearance is yellowish-brown, transparent to translucent, with oily luster and hardness similar to natural amber. The physic...

Embodiment 2

[0025] Embodiment 2: the preparation method of organic amber, concrete operations are as follows:

[0026] Pour the succinic acid powder into the crucible, then add the phthalic anhydride powder, mix the two thoroughly, add glycerol, and mix it evenly with a stirring rod, wherein the molar ratio of succinic acid: glycerol: phthalic anhydride is 2:1:1, then slowly raise the temperature from room temperature to 170°C at a heating rate of 3°C / min, keep warm for 2 hours for pre-firing; finally, slowly raise the temperature at a heating rate of 5°C / min from 170°C to 210°C, and keep warm for 2 hours Carry out solidification, cool naturally to room temperature after solidification is completed, take out and obtain organic amber.

[0027] The organic amber produced with this ratio has a refractive index of 1.52 and a density of 1.31. It is weak blue-green under long and short ultraviolet fluorescence, and its appearance is light yellow-brown, transparent to translucent, with a greasy ...

Embodiment 3

[0028] Embodiment 3: the preparation method of organic amber, concrete operation is as follows:

[0029] Pour succinic acid powder into the crucible, then add phthalic anhydride powder, mix the two thoroughly, then add glycerin, stir evenly, wherein the molar ratio of succinic acid: glycerol: phthalic anhydride is 3:1:1 , then slowly raise the temperature from room temperature to 165°C at a rate of 4°C / min, and keep it warm for 2.5 hours for pre-burning; finally, slowly raise the temperature at a rate of 4°C / min from 165°C to 205°C, keep it for 2.5 hours for curing, and the curing is complete After cooling down to room temperature naturally, take it out to get organic amber.

[0030] The organic amber produced with this ratio has a refractive index of 1.52 and a density of 1.39. It is weak green under long and short ultraviolet fluorescence, and its appearance is very light yellowish brown, translucent to opaque, with a greasy luster and lower hardness than natural amber.

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Abstract

The invention discloses a preparation method of organic amber, which comprises the following steps: gradually heating raw materials succinic acid, glycerol and phthalic anhydride to 160-170 DEG C at the rate of 3-5 DEG C / min, keeping the temperature for 2-3 hours, gradually heating to 200-210 DEG C at the rate of 3-5 DEG C / min, keeping the temperature for 2-3 hours, and finishing curing to obtain the organic amber. The synthetic amber prepared by the method has similar chemical composition to natural amber, and has similar color, tactile sensation, refracting index and other physical properties to natural amber. The method is simple to operate, has the advantage of low cost, and is suitable for industrial production.

Description

technical field [0001] The invention relates to an organic gem amber and a chemical synthesis method thereof, belonging to the field of gems. Background technique [0002] Amber is a natural organic gemstone. It is warm and smooth, bright colors, loved by people. With the explosive demand growth in China's jewelry market, natural amber resources are becoming increasingly scarce and prices are rising, making it difficult to meet the needs of all levels. From the perspective of protecting the natural environment and reducing people's purchase costs, how to use chemical methods to prepare organic gem amber is an urgent problem to be solved. [0003] The authoritative textbook "Systematic Gemology" on jewelry identification describes amber as follows: Amber contains organic substances such as succinic acid (chemical name succinic acid) and succinic resin (succinic acid esters). From the existing literature reports and invention patent retrieval situation, the so-called "artif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/08C07C69/80
Inventor 董鹍饶之帆杨晓云林劲畅崔小英
Owner KUNMING UNIV OF SCI & TECH
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