As a result of the modification of the additive to the coal tar road road oil, the family composition and properties of the road oil have changed. After upgrading, the asphaltene content in the road oil increased, and the insoluble matter decreased, thereby improving the plasticity and elasticity of the raw coal asphalt road building oil. The study found that the modification effect of rubber is better than that of SBS resin. The modification mechanism of the additive can be studied by using the difference of the RI spectrum of the asphaltene before and after the modification. During the upgrading process, the additive has a physical chemical interaction with the components in the raw coal asphalt road building oil, forming a new asphaltene molecule. In the production of scallions, we have been using a crystallization method. The key to increasing the amount of scallions is to improve the quality of scallions and control the appropriate crystallization temperature. To this end, we conducted a comparative experiment on the effects of different crystallization temperatures on the amount of green onions under laboratory conditions. Test Case 1. The composition of the eucalyptus oil lists the composition of the bismuth oil analyzed by capillary gas chromatography. 2 Test procedure: Ion oil of about 4009 was poured into a 60mL beaker, and the temperature was raised in a super constant temperature water bath until all the scallion oil was melted. The temperature at this time was about 90 ° C, and the mixture was uniformly cooled and then naturally cooled by 90 ° C in a water bath. To the specified crystallization temperature, during the incubation crystallization, the mixture was stirred once every 304 omni, and then vacuum filtered until 1 h 6 . In order to ensure constant temperature filtration, the Buchner funnel and filter paper should be preheated in an oven to prevent the precipitation of impurities due to the temperature drop of the onion oil during filtration. Turn on the vacuum pump and quickly pour the crystallized I 蕙 oil into the Buchner funnel. The filtration time is generally 20-30 mni. The mass of the obtained green onion is weighed with a balance, and the amount of ruthenium containing ruthenium is analyzed. Children Blazer,Fashion Custom Boys Blazer,Brass Button Boys Blazer,Boys Blazer Brass Button ShaoXing City Silversilk Garments CO.,LTD , https://www.silversilksuits.com