5 results about "Methylphosphonic acid" patented technology

The invention discloses a preparation method and application of a triazole phosphate type corrosion and scale inhibitor, and relates to the technical field of industrial water treatment chemicals. The compound is prepared by a three-step synthesis method which comprises the following steps: firstly, preparing an amino methylene phosphonic acid compound with one-NH reaction site from n ethylene (n + 1) amine, phosphorous acid and formaldehyde; secondly, preparing a triazole derivative from ethylene glycol glycidyl ether and triazole; and reacting the two products with sodium bicarbonate to obtain a target product. The target molecule contains a sodium phosphate group and a triazole group at the same time, through the synergistic effect of functional groups, intramolecular synergy of scale inhibition and corrosion inhibition functions is achieved, and the corrosion inhibition performance higher than that of a DETPMP scale and corrosion inhibitor used commercially is shown. The triazole phosphate type corrosion and scale inhibitor has good catalytic activity on photocatalytic carbon dioxide reduction under the conditions of room temperature and high temperature, the TON (carbon monoxide conversion number) can reach 1206, and the selectivity is 100%.

This invention relates to the field of ceramic materials, specifically disclosing a high water-resistant magnesium phosphate cement-based foam ceramic and its preparation method. The foam ceramic comprises the following components: 100-150 parts magnesium phosphate cement, 1-5 parts retarder, 5-20 parts foaming agent, 1-5 parts foam stabilizer, 5-15 parts lutetium ion source, 1-8 parts methylene phosphonic acid component, and 30-60 parts water. The method includes: (1) mixing the lutetium ion source, methylene phosphonic acid component, and water to obtain a complex solution. (2) mixing the magnesium phosphate cement and foam stabilizer, then adding the complex solution to the mixture and mixing to obtain a slurry. (3) adding the foaming agent to the slurry and allowing it to stand for foaming, followed by curing to obtain the foam ceramic. This invention not only effectively reduces the solubility of magnesium phosphate cement hydration products, but also combines CO2 foaming to generate a low-solubility magnesium carbonate shell, significantly improving the long-term stability of the foam ceramic in an aquatic environment while maintaining high porosity.

Compounds of the Formula (I), pharmaceutical compositions comprising compounds of the Formula (I), and their use for treating or preventing cancer: (I)

This invention relates to an aminomethylphosphonic acid aminoguanidine nonlinear optical crystal, its preparation method, and its uses. The crystal has the molecular formula (CN4OH7)(CH2NH3PO3), a molecular weight of 203.15, belongs to the orthorhombic crystal system, and has a space group of [missing information]. P 212121, cell parameters are a =6.276(2)Å, b =10.239(4)Å, c =13.868(4)Å, α =90.00° β =90.00° c =90.00° Z =4, V =891.2(5)Å 3 Centimeter-sized crystals were grown using evaporation, aqueous solution cooling, or hydrothermal methods. The ultraviolet absorption edge of these crystals is shorter than 200 nm, and the experimental birefringence is approximately 0.15 at 546 nm. This crystal preparation method is simple and low-cost, exhibiting significant nonlinear optical effects, a large birefringence, a wide transmission range, and ease of growth and processing. It can be used as an ultraviolet nonlinear optical crystal and a birefringent crystal.