Comprehensive analysis of the price trend of hydroxypropyl methylcellulose in 2015

Comprehensive analysis of the price trend of hydroxypropyl methylcellulose in 2015

First of all, from its production process, cellulose is a kind of important water-soluble polymer compound, which is the general name of a series of products produced by alkalization and etherification of natural cellulose such as cotton and wood pulp.

One step etherification

The powdered cotton wool was mixed with 50% sodium hydroxide solution at 60 ℃, and propylene oxide was continuously introduced under the condition of reactor pressure of 2.26 × 10-4 MPa. A mixture of 52% methyl ether, 43% methyl chloride and 5% propylene oxide was used. Add 50% sodium hydroxide solution again and mix. The reaction time was 1 h at 80 ℃. The degree of substitution of hydroxypropyl methyl cellulose was 20.2%, the degree of substitution of hydroxypropyl methyl cellulose was 25.4%, and the insoluble matter was less than 0.05%. In the reaction, the conversion of methyl chloride is 53.8%, and that of cyclopropylmethane is 42.6%.

Step etherification

Firstly, the cellulose powder was reacted with propylene oxide in nitrogen flow for 3 h, and the reaction temperature was 30 ~ 60 ℃. The reaction temperature was 35 ~ 80 ℃. The hydroxypropyl methylcellulose with 23.5% degree of substitution of hydroxypropyl was obtained. Example 5: the alkaline cellulose powder reacted with propylene oxide in the presence of halogenated hydrocarbons, and then reacted with chloromethane in the presence of sodium hydroxide to obtain hydroxypropyl methylcellulose. In this reaction, the conversion of propylene oxide and methyl chloride are 42.6% and 41.0%, respectively.

From the above points, we can see that the growth of cotton fields in Xinjiang this year is much higher than that in previous years, and new varieties of long pile noodles are also basically popular, the price tends to be stable, which is lower than that in 2014, but the quality has improved a lot. This year, the state vigorously supports the chemical industry and e-commerce industry. This is likely to indicate that the price of HPMC will be increased, and the quality of HPMC will also be improved.

Let's analyze the following market demand. Cellulose has excellent thickening, emulsification, film-forming, dispersion, colloid protection, water retention, adhesion, acid and alkali resistance, enzyme resistance and other properties. It is widely used in construction, coating, medicine, food, textile, oil field, cosmetics, detergent, ceramics, ink and chemical polymerization.

In the first half of this year, the official and unofficial data show that China's land market has a small warming, and the development of some new industries also increases the demand for cellulose, and requires higher quality. This will be a knockout competition for hydroxypropyl methyl fiber manufacturers. Technological innovation has new requirements for the high-precision cellulose, and the market demand is increasing Expanding prices is bound to increase steadily.

From the above point of view, the price trend of HPMC in 2015 will show a steady upward trend.