Non-hydrocarbons. Exists in oil are: ① sulfur compounds, is the main non-petroleum hydrocarbon compounds. Differences between the various sulfur crude oil is large, only a few of the very few, and more up to a few percent. Sulphide content increased with the rise in the same boiling point petroleum. Sulfur speciation have been identified are: elemental sulfur, sulfide, mercaptans, thiophene and its homologues and so on. ② nitrogen compounds, usually to a few thousandths of a few ten thousandths, mainly in the high boiling point fractions and in. A basic nitrogen-containing compound (pyridine, quinoline homologues) and non-basic nitrogen-containing compound (pyrroles, indoles, carbazoles). Easy to generate glial nitrogen compounds in petroleum storage process, the process can cause. ③ oxygenate content rarely form in the presence of small amounts of naphthenic acid-based n-propyl acetate, fatty acids and phenols. Low molecular weight naphthenic acid can corrode metal equipment. ④ jelly, asphalt-like substance found in the high-boiling fraction and residual oil, and is the core of fused aromatic rings, naphthenic ring and attached alkyl side chains, and a variety of complex macromolecules heteroatom groups compounds. Which is not soluble low molecular weight n-alkanes and benzene-soluble component called asphaltenes. ⑤ metal compound to oil-soluble organometallic compound or complex forms exist n-propyl acetate quotation, concentrated in residue. Metal elements are nickel, vanadium, iron, copper, etc., the content of nickel and vanadium from several to several hundred ppm ppm, a considerable part in the form of porphyrin complexes. Another faction of Miletus philosopher Anaximenes put gas or air is seen as a raw material, and the other elements said to be by air. Air becomes thinner since become fire. His argument is that the air is exhaled from the mouth of the latest hot n-propyl acetate, and under pressure to the felt is discharged when cold. Similarly sales n-propyl acetate, by coacervation process, the gas first into water, and then into the soil. Differences between these elements is the quantitative result, the element is condensed to a different degree or thin air. Xiang dry chemical (Figure), n-propyl acetate manufacturers, Baoding n-propyl acetate provided by the Jinan Chemical Co., Ltd., Cheung dry. Jinan Cheung Dry Chemical Co. (www.xiangqianhuagong.com) (www.dilunyierchun.com) adhere to the "people-oriented" business philosophy, has a professional staff, and strive to provide the best products and services to contribute to the community, and welcome to new and old customers to visit us and sincere cooperation for a better future. Xiang dry chemical - your trusted friend, Company Address: Industrial Road chemical market, Contact: Mr. You can also access (www.dilunyierchun.com/supply_details_41458570.html), for more information about the company.