Soybean Oil based Polyol Preparation
- Details
- Category: Tungsten Information
- Published on Saturday, 07 October 2017 16:52
Soybean oil based polyol is a widely used non-toxic plasticizer and stabilizer of pvc.
It can give the product good mechanical strength, weather resistance and electrical properties, and no toxicity, is internationally recognized for food packaging materials chemical process aids.
The soybean oil-based polyol by epoxy soybean oil oxidation preparation method, the traditional preparation of vegetable oil-based polyols is the use of liquid acid as the catalyst, but its drawback is that after the end of the reaction catalyst residues in the products, the impact of product performance in a certain extent.
In recent years, keggin type tungsten heteropoly acid because of its strong B acid as an acidic catalyst is widely used to replace the acidic catalyst, phosphotungstic acid as a typical representative of heteropoly acid and acid catalyst activity can be loaded on some carriers, such as loading on ZrO2, non mesoporous materials such as TiO2. Heterogeneous catalysts prepared by sol-gel process based on mesoporous molecular sieves and phosphotungstic acid have good catalytic activity and stability, and are easy to separate from the product.
Some scholars have catalyzed the preparation of soybean oil polyols with phosphotungstic acid mesoporous molecular sieves. A certain amount of open loop reagent methanol and phosphotungstic acid catalyst mesoporous molecular sieve mixing, heating to a certain temperature by the dropwise addition of epoxy soybean oil and strong mixing, in 45 min will start ticking all drop when the epoxy soybean oil. After the reaction, cooling to room temperature, filtering to remove the catalyst after extraction with ethyl acetate, and then with distilled water and saturated salt water washing to neutral, take the upper liquid into the anhydrous Magnesium Sulfate overnight drying, removing solvent to obtain soybean oil-based polyol and after filtering, vacuum distillation.
It was found that the phosphotungstic acid mesoporous molecular sieve could catalyze the epoxidized soybean oil ring opening to prepare soybean oil based polyols. The experimental optimization of soybean oil-based polyol preparation conditions for reaction time 3 h and phosphotungstic acid mesoporous molecular sieve catalyst for epoxy soybean oil quality of 3%, 1, 13: molar ratio of methanol to oil the reaction temperature is 75 DEG C response. Under these conditions, the conversion rate of soybean oil based polyol obtained was 77.25%. The conversion rate was similar to that of traditional process, but the purity was better.
- Tungsten Oxide Manufacturer & Supplier, Chinatungsten Online: www.tungsten-oxide.com
- Tungsten News & Prices of China Tungsten Industry Association: www.ctia.com.cn
- Molybdenum News & Price: news.molybdenum.com.cn
- Tel.: 86 592 5129696; Fax: 86 592 5129797; Email: sales@chinatungsten.com
sales@chinatungsten.com
闽公网安备 35020602000140号