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A stearic acid ester and preparation technology, which is applied in the field of surfactant preparation technology, can solve the problems of high energy consumption, high reaction temperature, and easy occurrence of side reactions, and achieve the effects of reducing production energy consumption and solving side reactions
Active Publication Date: 2009-05-13
SHANDONG LONGLIVE BIO TECH CO LTD
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Problems solved by technology
[0005] In order to overcome the deficiencies of the prior art, the present invention provides a preparation process of xylitol stearate to solve the problem that the existing surfactant contains harmful substances to the human body, is not suitable for being widely used in the food field and existing production technology. Problems such as high temperature, high energy consumption and prone to side reactions during the reaction process
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Embodiment 1
[0021] Taking the production of xylitol stearate as an example, the specific preparation method is as follows:
[0022] 1. Ingredients
[0023] Get the xylitol 480g that purity is 98.5%, the stearic acid 230g that acid value is 200, the orthophosphoric acid 2.5g that purity is 85% is standby;
[0024] 2. Dehydration
[0025] The esterification reaction of xylitol and flaky solid stearate needs to be carried out in a closed (sealed reflux condensation) reactor with a vacuum of 1.68-3.00 tow, and at 100-105°C to remove the moisture.
[0026] 3. Reaction
[0027] Raise the temperature to 150-170°C for 2 hours.
[0028] 4. Decolorization
[0029] Add 1.0% activated carbon of the total weight of the reaction solution into the reaction tank, stir at 80° C. for 30 min, and filter to obtain the product.
[0030] 5. Packaging
[0031] Finished product packaging, inspection and storage.
Embodiment 2
[0033] Taking the production of xylitol stearate as an example, the specific preparation method is as follows:
[0034] 1. Ingredients
[0035] Get 480g of xylitol with a purity of 98.5%, 230g of stearic acid with an acid value of 200, and 6g of sodium hydroxide with a purity of 97% for subsequent use;
[0036] 2. Dehydration
[0037] The esterification reaction of xylitol and stearate needs to be carried out in a closed (sealed reflux condensation) reaction kettle with a vacuum of 1.68-3.00 tow and at 100-105°C to remove the moisture in the reaction material molecules.
[0038] 3. Reaction
[0039] Raise the temperature to 150-170°C for 2 hours.
[0040] 4. Decolorization
[0041] Add 1.0% activated carbon of the total weight of the reaction solution into the reaction tank, stir at 80° C. for 30 min, and filter to obtain the product.
[0042] 5. Packaging
[0043] Finished product packaging, inspection and storage.
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Abstract
The invention discloses a preparing technology for xylitol stearate, and relates to a preparing technology for surfactant. The preparing technology adopts xylitol and stearic acid as main raw materials to prepare the surfactant, and is characterized in that the formulation ratio of the raw materials is as follows: 480 to 500 grams of crystallized xylitol with purity of more than 98 percent, 200 to 230 grams of the stearic acid with acid value of between 195 and 218, and 1.5 to 3.5 grams of liquid orthophosphoric acid with purity of more than 80 percent (or 4 to 8 grams of solid sodium hydroxide with purity of more than 95 percent). The preparation method comprises the following steps: 1, blending; 2, dehydrating; 3, reacting; 4, decoloring; and 5, packaging. The xylitol stearate can be synthesized at certain temperature by adopting the preparation method; the surfactant has the same performance as Span but is superior to the Span, does not contain harmful substances to human body, and can be more widely used in the food industry; at the same time, reaction temperature is reduced to between 150 and 175 DEG C from more than 200 DEG C in the prior art, so the preparation method solves the problem of side reaction easily generated during reaction in the prior art, and reduces production energy consumption.
Description
technical field [0001] The invention relates to a surfactant preparation process. Background technique [0002] Surfactant is a chemical auxiliary in petroleum, chemical industry, light industry, food, medicine, textile and other departments. It is used in a small amount, but it plays an extremely important role in promoting reaction, improving performance and improving product quality. [0003] Surfactants can be divided into three types: anionic, cationic, and nonionic. Among the polyol nonionic surfactants, the most well-known are sorbitol fatty acid esters, that is, Span (Span) and Tween (Tween), which are commonly used in the world, are sorbitol fatty acid esters with ethylene oxide. Addition reaction derived. Since the raw material contains ethylene oxide, which is a harmful substance to the human body, sorbitan fatty acid ester is not suitable for being widely used in the food field. [0004] Xylitol and sorbitol both belong to polyols. Xylitol has only one carbon...
Claims
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Application Information
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