Monthly Archives: December 2018

How to make soap from animal fat/soap making machine

How to make soap from animal fat

Lipids are substances insoluble in water. They are derived from animals and plants and are mainly composed of triglycerides, fatty acids.Customarily: usually the room temperature liquid is called oil, solid or semisolid is called fat, both collectively known as grease.Grease is the main raw material of soap making, and the performance and quality of soap are largely determined by the grease used, so the choice of grease is the key to soap making.

1. Main animal fat for making soap.Commonly used soap main animal fat: butter, lard.Butter is the main by-product of fatty acid processing industry and the main raw material of soap soap.Lard is rich in linoleic acid, so it tends to rot when used as soap.When soap is made, semi-hardened non-edible lard is substituted for butter.

2. Extraction of animal fat

Animal fat needs to pay attention to the control of lipase and bacteria before cooking fat, so as to get high quality animal fat.The quality of oil can be improved by washing, decolorization, alkali refining, deodorization, hydrogenation and other processes.

1) wash

Washing can effectively remove pigment and impurities in oil.Had better be in water temperature (100 ℃).In order to enhance the hydration effect, you can add a mild surfactant, such as sodium phosphate, 0.1% of the amount of oil into a solution of 10%.

2) decoloring

Animal fat used for making soap usually needs to remove pigment. The most commonly used is to use acid activated clay for adsorption to remove pigment.Oil decolorization, the temperature is 105-115 ℃, and need to add 0.5% to 1% of the water, more advantageous for decoloring.

3) the alkali refining

Alkali refining is carried out only on special requirements (soap of the highest quality).The proper concentration of sodium hydroxide solution is used in the alkali refining of oil.After decolorization, alkali refining and decolorization of tallow, the oil color can reach 0.5-1.0.

4) deodorant

Deodorization of oils used to make soap is not very common.Perfume is often used to mask the smell of soap.

5) hydrogenation

The hydrogenation of oil increases the stability of oil and improves the foam and solubility of soap.In particular, hydrogenation of unsaturated fatty acid polymers can prevent soap deterioration.Animal fat can be obtained from the saponification of oil, soap base production, soap base drying, plus ingredients, layering, cutting, printing, packaging, and finally made into soap.

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How is soap made/soap making machine

How is soap made

Soap can be divided into soap, pharmaceutical soap, transparent soap, laundry soap, soap chips, liquid soap and industrial soap according to the composition, appearance and use of the product.Soap is used to clean the skin.It is required to be mild and non-irritating to human skin, with pleasant and long-lasting fragrance;Soap with antibacterial agents, for human skin disinfection, cleaning;Washing soap is used for washing clothes;Saponin is nearly neutral, it does not hurt clothing materials, often used for washing silk, wool fabrics;Transparent soap can be used for both human skin cleaning and laundry;Liquid soaps are used to clean skin or objects and laundry depending on the formula.Industrial soap is mainly used in the textile industry.Soap production is very simple, at present, the more popular methods are: (1) use oil to do: oil through refining, saponification to obtain soap base.Grease is the main raw material of soap making in this way. The performance and quality of soap are largely determined by grease, so the choice of grease is one of the keys of soap making.Fz-2000 oil saponification and soap complete set production line can be used to obtain oil from animals and plants. Through saponification of oil, soap base can be produced. After the soap base is dried, ingredients, slitting, cutting, printing and packaging can be added to make soap.

(2) with intermediate soap noodle: by buying from companies finished noodle (soap), the complet soap production line, there are three-roll grinder, conveyor, duplex screw extruder machine, vacuum pump, stamper, cutter and other equipment components, layering, cutting, printing, packaging, finally produce the qualified soap.

Soap production principle is very simple, but the colloidal properties of aqueous solution of soap and soap, it’s not easy to get pure soap, it’s not easy to get pure soap, soap is made of high quality, the requirements on the choice of raw materials, oil refining, saponification, refined, glycerine recycling and so on each link has a definite judgment and monitoring.


Soap production process/soap making machine


soap making machine 1. The basic chemical reaction of soap making is the interaction between grease and alkali which is used  to produce soap and glycerin:

2. Make soap CH2OCOR

| heating

CHOCOR + 3NaOH —>, 3r-coona + ch2oh-choh-ch2oh, |


The soap obtained from the reaction is called soap base after salting out, washing and finishing, and then continues to be processed into soap of various commercial forms

3. The refining

Remove impurities from grease.Common refining processes include dejiao, alkali refining (deacidification) and decolorization.Degumming is the removal of phospholipids and other colloids in oil. The main function of alkali refining is to remove free fatty acids in oil, but the pigment and impurities in oil are removed due to floccus soap generation and adsorption.

4. The saponification

The oil was refined and saponified with alkali.Boiling method is the main saponification method, the soap pot is cylindrical or square. 

Oil and caustic soda are boiled in a soap pot until saponification rate reaches about 95%. Saponification is stopped when the soap material is uniformly closed.

5. Salting out

In a closed soap stock, salt or saturated salt water is added to separate the soap from dilute glycerine water.The lowest concentration at which soap can be separated is called the limit concentration of salinity.The closed soap gum after salting out, the upper layer of soap called soap particles;The glycerine water with salt in the lower layer is discharged from the bottom of the soap pot to recover glycerol.

6. Wash

After separating the waste liquid, add water and steam to boil the soap granules, make them into uniform soap glue from the separating state, and wash out the remaining glycerin, pigment and impurities.

7. Basic analysis

In order to saponify the remaining oil in the soap granules completely, glycerol, salt, pigment and impurities in the soap granules were further washed by alkali analysis.The lowest concentration of alkali completely precipitated from alkaline precipitation is called the limit concentration of alkaline precipitation.The adjustment is sufficient to separate the soap into two phases.The upper layer is pure soap base and the lower layer is soap foot.Soap foot colour and lustre is deep, impurity is much, when next pan alkali is analysed commonly, reuse.

8. The molding

Soap base condenses into a large soap plate, and then cuts off into soap blank, which is printed and dried into laundry soap, soap and other products.

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