Preparation of low aromatic and low viscosity narrow fraction injection liquid paraffine

Abstract

The invention relates to a method for injection preparation of low-aromatic low-viscosity narrow fraction. The method has the advantages that the method comprises the steps of: 1) the preparation of a raw material, in which a related petroleum product is distilled to obtain fraction with a temperature of between 270 and 320 DEG C to serve as an injection white oil raw material; 2) the impurity removal of the raw material, in which hydrogen and the raw material are added into a hydrogenation reactor according to the volume ratio of 500: 1000 for a first-stage hydrogenation reaction to obtain impurity-removed white oil; 3) deep dearomatization, in which the hydrogen and the impurity-removed white oil are added into the hydrogenation reactor according to the volume ratio of 300: 500 for a second-stage hydrogenation reaction to obtain dearomatized white oil with the content of aromatic hydrocarbon less than 50ppm; and 4) adsorption refining, in which the dearomatized white oil is removed with foreign odor and mechanical impurities through an adsorptive reactor with 13X as an adsorbent under the condition that the pressure is normal pressure, the temperature is between 115 and 125 DEG C, and the volume space velocity is between 0.5 and 1.0h, and is refined to obtain injection white oil. The method has the advantages that the method adopts the narrow fraction, and has relatively single product components and good performance stability; and the content of the aromatic hydrocarbon of the injection white oil prepared by adopting two-step hydrogenation and adsorption refining is less than 50ppm, and is lower than those of import white oil and domestic white oil, so a product almost has no toxicity.

Description

technical field [0001] The invention relates to a production method of injection white oil, in particular to a method for injection white oil with low aroma, low viscosity and narrow fraction. Background technique [0002] Injection white oil and emulsifier are the main raw materials for the production of inactivated vaccines. At present, white oil for injection in my country is mainly replaced by No. 10 food-grade white oil, and the viscosity at 40°C is generally 7.9-13mm. 2 / s, the content of aromatics is generally about 170ppm, and the carbon number distribution is also wide, so the inactivated vaccine (water-in-oil) prepared with it is often viscous, which makes injection difficult and has strong toxic and side effects (allergies). It causes redness, swelling and suppuration at the injection site, and the erythema at the injection site of the animal cannot be eliminated. After slaughter, it will affect the quality and appearance of the meat, and even affect food safety....

AI Technical Summary

Problems solved by technology

However, the number of carbon atoms is too small, the viscosity of the oil is too low, it is easy to break the emulsion during the vaccine preparation process and make the product performance unstable, so the carbon number distribution must be more reasonable

[0004] At present, the general production and production of injection white oil in our country is made by acid-base or deep hydrogenation of lubricating oil base oil with corresponding viscosity. At present, lubricating oil base oil is basically blended according to certain physical properties such as viscosity and flash point. Therefore, the performance stability of the injection white oil prepared by it is poor, and the performance of the vaccine produced is also unstable.

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