5 results about "Phosphorous acid" patented technology

The invention discloses a crystal material. The chemical formula is Mg11(HPO3)8(OH)6, the reflectivity in an ultraviolet-visible-near infrared band of 0.2-2.5 microns is 88% or above, and simultaneously the emissivity in a far infrared band of 2.5-25 microns is 0.90 or above. The invention also discloses a preparation method of the crystal material. The preparation method comprises the following steps: on the basis of raw materials of magnesium acetate tetrahydrate and phosphorous acid, simultaneously adding a cyclohexylamine template agent, and preparing the Mg11(HPO3)8(OH)6 crystal powder bya hydrothermal synthesis method. According to the crystal material provided by the invention, comprehensive performance of reflection and radiation can be well combined, the actual cooling effect is2-10 DEG C better than the common heat reflecting material titanium dioxide in the market, and the crystal material can be well applied to the field of heat reflection infrared radiation.

The invention relates to a preparation method of fatty alcohol sebacate and belongs to the technical field of ester compound synthesis in organic chemistry. The preparation method includes the following steps: (1) with sebacic acid and an unitary C10-C13 fatty acid as raw materials, adding a composite catalyst composed of p-toluenesulfonic acid and phosphorous acid, increasing the temperature to 130-150 DEG C and performing an esterification reaction for 3-8 h; (2) increasing the temperature to 150-180 DEG C with vacuum degree being not more than 10 mbar, and performing dealcoholization for 0.5-2 h; and (3) adding an adsorbent to adsorb residual catalyst in a product, and filtering the product to prepare the fatty alcohol sebacate. The preparation method achieves the advantages of high ester content and slight color.

The invention discloses a catalyst-based chlorinated neopentane preparation technology which is characterized in that a addition reaction is carried out on isoamylene and 36% of hydrochloric acid (in mass percent) under the condition of zinc chloride, the molar ratio of the zinc chloride to the isoamylene is 3:500-6:500, the molar ratio of the isoamylene to hydrochloric acid is 1:1.1-1:1.3, the reaction temperature is 5+/-1 DEG C, and the reaction time is 4-5 hours. The catalyst-based chlorinated neopentane preparation technology has the beneficial effects of having simple technology, being convenient to prepare, easy to realize and short in reaction time, having less addition side reaction, high product content and yield, effectively solving the problem that high content pentane chloride cannot be produced if phosphorous acid is not coproduced, and being considerable in economic benefit.