Method for producing water-white hydrogenated rosin

A technology for hydrogenating rosin and rosin, which is applied in the direction of chemical modification of natural resins, can solve problems such as practical operation difficulties, and achieve the effects of reducing poisoning factors, low pressure, and improving the degree of hydrogenation.

Active Publication Date: 2011-05-25
广西梧州日成林产化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is to purify rosin and then carry out hydrogenation method, but for the continuous catalytic production of fixed bed, due to the simultaneous hydrogenation of chemical components such as rosin and turpentine, the conditions such as reaction temperature and reaction pressure are saturated with hydrogenation of the target product There is a large difference in the degree of control, and the actual operation is difficult

Method used

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  • Method for producing water-white hydrogenated rosin
  • Method for producing water-white hydrogenated rosin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Distillation and purification: put the rosin with an acid value of 170, an iodine value of 179, a softening point of 76, and a color of first-grade (WW) or extra-grade (X) into the still, and carry out high-vacuum distillation according to the following conditions to obtain the initial Fractions, main fractions, residues.

[0053]

[0054] Hydrogenation by solvent method: add the main fraction RGR and solvent pinane to the melting pot, melt at 100-150°C, and prepare a rosin solution with a concentration of 30-60% by weight, with a flow rate of 600-1000l / h. The amount of material enters the hydrogenation system, and is preheated to 100-200°C and mixed with hydrogen, and then enters the granular palladium-carbon or Raney nickel, the dosage is 1.0m 3 In each batch of fixed-bed reactors, the temperature of each reactor is controlled at 180-260°C, the temperature difference between each section of the reactor is less than 10°C, and the distribution is increasing, the hydr...

Embodiment 2

[0057] Add the refined rosin into the dissolving pot, add pinane to adjust the concentration of rosin by weight to 60-80%, the flow rate to 200-600l / h., control the temperature of the reactor to 180-260°C, and the temperature difference of each reactor to be less than 10 °C, increasing distribution, hydrogen pressure between 5.0-15MPa, gas-liquid ratio greater than 2000, reaction time 2-3 hours, and the rest of the process is the same as the embodiment. The product index is: Color: (Luo Weibang) XC 0.5 0.3 , softening point: 77.5°C, acid value: 173mg / g, abietic acid: 0.0%, tetrahydroabietic acid: 56.2%, dehydroabietic acid: 8.0%, iodine value: 16gI 2 / 100g.

Embodiment 3

[0059] The solvent in Example 1 is replaced with turpentine, a mixture of turpentine and pinane, and the temperature of each reactor is mainly controlled at 180-260° C., and all the other processes are the same as in Example 1. The product index is: Color: (Luo Weibang) XC 0.6 0.3 , softening point: 78.9°C, acid value: 172mg / g, abietic acid: 0.0%, tetrahydroabietic acid: 54.2%, dehydroabietic acid: 8.4%, iodine value: 27gI 2 / 100g.

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Abstract

The invention relates to a method for producing water-white hydrogenated rosin, which comprises the following steps: using light color refined rosin obtained after purifying the rosin as hydrogenation raw materials, using a solvent for preparing solution, carrying out catalytic hydrogenation, then, separating out the solvent through distillation, and obtaining the water-white hydrogenated rosin. When the method provided by the invention is adopted, the water-white hydrogenated rosin with light color (the Lovibond color number of the yellow color is 0.3 to 1.0, and the Lovibond color number of the red color is 0.2 to 0.3), low iodine value and low abietic acid content can be obtained. Compared with the water-white hydrogenated rosin produced by a traditional method, the water-white hydrogenated rosin produced by the method provided by the invention has the advantages of lighter color, higher hydrogenation degree, better stability and lower cost, and the application value of products can be improved when the water-white hydrogenated rosin is applied to aspects such as electronics, paint, bonding agents, dyestuff and the like.

Description

technical field [0001] The invention relates to a production method of hydrogenated rosin, in particular to a production method of water white hydrogenated rosin. Background technique [0002] Rosin is an abundant and renewable natural resource in my country. Because of its special molecular structure and properties, it is widely used in electronics, coatings, adhesives, inks, pigments, synthetic rubber, food, metal processing, building materials and other industries. It is also used as a synthetic Fine chemicals and new polymer materials. With the rapid development of the economy, the quality requirements of these industries for rosin and its deep-processing products are also continuously increasing, and color is one of the important quality indicators of rosin and its deep-processing products. The level of deep processing products. [0003] One of the disadvantages of rosin is the appearance coloring. In recent years, research on the color of rosin and its deep-processed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09F1/04
Inventor 李前林克忠侯文彪陈少芳江文夺叶江青孔令森黄斌冉启斌
Owner 广西梧州日成林产化工股份有限公司
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