Today I will share with you the knowledge of glycerin, and also explain the steps on how to use glycerin. If it happens to solve the problem you are facing now, don\’t forget to pay attention to this site, now let\’s start!
Contents of this article
- The difference between pure glycerin and glycerol
- How to use glycerin
- What material is glycerin made of
- Is glycerin oil
- Glycerin chemical expression
- Source of glycerin
1. Pure glycerin and The difference between glycerin
1. The difference between pure glycerin and glycerin is mainly the difference in oiliness.
2. Generally speaking, pure glycerin is very oily, and it is difficult for the skin to absorb it if it is applied to the skin. Glycerin, especially skin care glycerin, is added to an aqueous solution. After diluting the oiliness of pure glycerin, it is applied on the skin, which not only allows the skin to absorb it, but also protects the skin.
2. How to use glycerol
1. Prepare the necessary Materials: Glycerin, container, clean rag or paper towel.
2. Clean and dry the container to ensure there are no impurities.
3. Open the cap of the glycerin bottle and pour the glycerin into the container. You can choose to pour an appropriate amount of glycerin as needed.
4. Use your fingers or a cotton ball to gently apply glycerin to the area that needs treatment or moisturizing. It can be skin, hair or other parts.
Gently massage with fingertips to help the glycerin be better absorbed. The massage time can be adjusted as needed.
6. Wait for a while to allow the glycerin to be fully absorbed. This time can be determined based on needs and personal feelings.
7. If necessary, you can gently wipe away excess glycerin with a clean rag or paper towel.
It should be noted that every The methods and steps for using glycerin may vary depending on individual skin and needs. Therefore, it is recommended to read the product instructions or seek professional advice before use.
3. What material is glycerin made of
Glycerin is divided into natural glycerin and synthetic glycerin. Natural glycerin is made of natural oils. Yes, synthetic glycerin is made of propylene
1. Using natural oil as raw material, the glycerol obtained is called natural glycerin;
Natural oils and fats are still the main raw materials for the production of glycerol, of which about 42% are obtained from soap making by-products and 58% are obtained from the saponification reaction of oils and fats in the soap making industry. p>
2. The synthesis method uses propylene as raw material, and the resulting glycerin is called synthetic glycerin.
Propylene and glycerin. Peracetic acid acts to synthesize propylene oxide, which is isomerized into allyl alcohol, which then reacts with peracetic acid to form glycidol (glycidol), and is finally hydrolyzed into glycerol. The production of peracetic acid does not require a catalyst. , gas phase oxidation of acetaldehyde and oxygen, under normal pressure, 150-160°C, and contact time of 24 seconds, the acetaldehyde conversion rate is 11%, and the peracetic acid selectivity is 83%.
4. Is glycerin oil
1. Glycerin is not oil. Oil is a general term for hydrophobic substances that are liquid at room temperature. , composed of one or more liquid hydrocarbons. Glycerol is a colorless, odorless, sweet, clear and thick liquid, usually made from oil and alcohol. The difference between hydrocarbons such as ketones and ethers is that the components of oil are not polarized.
2. Oils are generally divided into vegetable oils, animal oils, mineral oils, and essential oils ( Essential oils), silicone oil.
3. Glycerin is an organic substance that can absorb moisture from the air, as well as hydrogen sulfide, hydrogen cyanide and sulfur dioxide.
4. Glycerol is the skeleton component of triglyceride molecules and is difficult to dissolve in benzene and chloroform., carbon tetrachloride, carbon disulfide, petroleum ether and oils.
5. Chemical expression of glycerol
The chemical formula of glycerol: glycerol It is glycerol, its simplified structural formula is HOCH2CHOHCH2OH or C3H5(OH)3, and its molecular formula is C3H8O3.
[Physical and chemical properties]: Melting point 18.17℃. Boiling point 290℃ (decomposition). Flash point (open cup) 177℃. Density 1.261g/cm3. Refractive index nD(20℃)1.474. Viscosity (20℃) 1499mPa·s. Miscible with water and ethanol, the aqueous solution is neutral. Soluble in 11 times of ethyl acetate and about 500 times of diethyl ether. Insoluble in benzene, chloroform, carbon tetrachloride, carbon disulfide, petroleum ether and oil.
6. The source of glycerin
1. The history and The soap industry is closely related because the first commercial glycerin products were recovered from soap waste liquor. To this day, soap waste remains a common raw material for recycling glycerin. In the early 1870s, the United States issued the first patent for \”Recovery of Glycerin from Soap Waste Liquid by Distillation Method.\” This process was further improved by Run-corn in 1883, and over the next few decades, manufacturing began to recover glycerol from the \”wastewater\” of the soapmaking process on a large scale, making glycerin an easily available commodity.
2. Another main source of glycerol is sweet water obtained by hydrolysis of oils, which was originally derived from the stearin needed to make candles. From the late 19th century to the early 20th century, the famous Twitchell process for oil hydrolysis was successfully developed. Twitchell developed a process for hydrolyzing grease using dilute sulfuric acid and a catalyst to produce a qualified product. The subsequently invented autoclave cracking process relies on high-pressure steam to hydrolyze grease and is the most advanced hydrolysis process. This high-quality sweet water can be further processed into the high-purity glycerin used today.
OK, this article ends here, I hope it will be helpful to everyone.
