【Basic Knowledge Activity】Professional “Basic Knowledge” in the petrochemical sector: What are the acidity and acid number of petroleum products?
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This post was last edited by Adventure Wang on 2016-3-16 09:40. What are the acidity and acid number of petroleum products? Acidity refers to the number of milligrams of potassium hydroxide required to neutralize 100 mL of the oil sample [mg(KOH)/100mL]; this value is generally applicable to light oils. Acid value, on the other hand, refers to the number of milligrams of potassium hydroxide needed to neutralize 1 g of the oil sample [mg(KOH)/g]. Correct answer: +5 points for in-depth discussion; +10 points============================================= 【Petrochemical Section】A compilation of professional “basic knowledge” posts (supported by the main forum; amazing prizes await you!) http://bbs.hcbbs.com/thread-1557057-1-1.html (Source: Haichuan Chemical Forum) This initiative encourages various forums to create or individuals to post basic knowledge-related posts; the content can be gathered from the internet or created originally, and participation can take place through multiple topics. There are no restrictions on the way of participation – it could be an explanation of a noun or an introduction to a series of principles. What are some suggestions and methods for getting in touch with cleaners? The regular administrator will reward the content that performs well. You will also be rewarded for regions where the activities are more intensive. (Regions should also carry out summarization and optimization based on the amount of such content available in their area.) ———————————————— The second phase of the event runs from February 20, 2016, to the end of June 2016; at least 50 award vouchers are available for you to claim (mugs, power banks, USB drives, and other prizes or event benefits). Awards can be given at any time based on performance, and additional rewards can also be granted at any time depending on performance. (12,000 event points and rewards await the regions that perform well)
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The number of milligrams of potassium hydroxide (KOH) required to neutralize the acid in 1 gram of oil is called the acid value, with the unit being mg·KOH/g. The number of milligrams of potassium hydroxide (KOH) needed to neutralize the acid in 100 milliliters of oil is called the acidity, with the unit being mg·KOH/100ml.
The number of milligrams of potassium hydroxide (KOH) required to neutralize 100 milliliters of oil is referred to as acidity； The amount of hydrogen and potassium hydroxide (KOH) consumed, in milligrams, is known as the acid value. The acid value and acidity represent the total amount of organic acids contained in crude oil and refined oils, respectively.
The acid value is an indicator of the amount of free acids present in organic substances such as fats, polyesters, and paraffins. Specifically, it refers to the number of milligrams of potassium hydroxide required to neutralize 1 gram of the sample under experimental conditions. It is determined using acid-base titration, with phenolphthalein often used as an indicator to determine the endpoint. The acid value is also known as the acid price; it denotes the number of milligrams of potassium hydroxide needed to neutralize the free acids in 1 gram of natural fat. The value of the acid value reflects the level of free acids present in the fat. In environmental chemistry, acidity refers to all substances in water that can undergo neutralization reactions with strong bases. To better represent the acidity or alkalinity of a solution, scientists have introduced the concept of acidity expressed as AG=lgc(H+)/lgc(OH-). This parameter allows for a better representation of the acid-base range and expands the scope of the original pH value. In this formula, [H+] and [OH-] represent the molar concentrations of hydrogen ions and hydroxide ions, respectively.
The number of milligrams of potassium hydroxide (KOH) required to neutralize the acid in 1 gram of oil is called the acid value, with the unit being mg·KOH/g. The number of milligrams of potassium hydroxide (KOH) needed to neutralize the acid in 100 milliliters of oil is called the acidity, with the unit being mg·KOH/100ml.
I know that the acid value is determined by titrating oils dissolved in toluene-isopropanol using an isopropanol solution of KOH; this method is mainly used for dark-colored oils such as crude oil, lubricating oils, heavy oils, and residue. For lighter-colored oils, an ethanol solution of KOH is used for titration, as these oils are dissolved in ethanol, and this method is applied to fuels like gasoline and diesel
It’s just the pH level, that is, the acidity or alkalinity value
Acidity refers to the number of milligrams of potassium hydroxide required to neutralize 100 mL of the oil sample [mg(KOH)/100mL], and this value is generally applicable to light oils; acid number refers to the number of milligrams of potassium hydroxide required to neutralize 1 g of the oil sample [mg(KOH)/g]
Acidity refers to the number of milligrams of potassium hydroxide required to neutralize 100 ML of the oil sample, and it is generally applicable to light oils. The acid value refers to the number of milligrams of potassium hydroxide required to neutralize 1 gram of the oil sample, and it is generally applicable to medium-quality oils. The test method involves extracting the acidic components from the oil sample using boiling ethanol, and then titrating it with a potassium hydroxide solution.
Acidity refers to the number of milligrams of potassium hydroxide required to neutralize 100 mL of the oil sample [mg(KOH)/100mL], and this value is generally applicable to light oils; acid number refers to the number of milligrams of potassium hydroxide required to neutralize 1 g of the oil sample [mg(KOH)/g]