7 results about "Terephthalic acid" patented technology

The invention relates to a PBT (polybutylene terephthalate) production technique. The technique comprises the following steps: carrying out liquid-phase tackifying on 1,4-butanediol, terephthalic acid and a catalyst to obtain PBT with the viscosity of 1.05-1.35 dL/g; in the liquid-phase tackifying process, adding a nucleating agent which accounts for 0.02-1 wt% of the raw materials, and uniformly mixing; and after the liquid-phase tackifying, adding a lubricant which accounts for 0.02-1 wt% of the raw materials, and uniformly mixing. In the liquid-phase tackifying process, 0.02-1 wt% of the nucleating agent is added and uniformly mixed, thereby having great effects on enhancing hardness and side pressure resistance; and after the liquid-phase tackifying, 0.02-1 wt% of the lubricant is added and uniformly mixed to enhance the surface smoothness of the loose tube, so that the pipe diameter is uniform and stable.

The invention provides a method for preparing mesoporous zirconium phosphate supported nano copper oxide antibacterial polyester fibers. The method is characterized by including the specific steps that firstly, a copper oxide @ mesoporous zirconium phosphate gel precursor is prepared; secondly, the copper oxide @ mesoporous zirconium phosphate gel precursor and polyester are mixed and granulated at the temperature of 180-270 DEG C, dried and then spun into the mesoporous zirconium phosphate supported nano copper oxide antibacterial polyester fibers through a melt spinning method, or the copper oxide @ mesoporous zirconium phosphate gel precursor, terephthalic acid (PTA), dihydric alcohol, stabilizer and a catalyst are added into a polyester reactor according to a proportion, and a nano copper oxide @ mesoporous zirconium phosphate/polyester antibacterial composite material is prepared by means of in situ polymerization through a polymerization reaction thermal one-step method, dried and spun into the mesoporous zirconium phosphate supported nano copper oxide antibacterial polyester fibers through the melt spinning method. The method is simple in operation, efficient, low in cost, lasting in effect and wide in application prospect.

The invention discloses preparation of a water-soluble metal-organic framework composite material and application thereof in detecting the concentration of fluorine ions in water. The preparation comprises the following steps of: preparing a urea solution; adding aluminum trichloride into ultrapure water, carrying out ultrasonic treatment until the aluminum trichloride is completely dissolved, adding 2-aminoterephthalic acid under a stirring condition, and stirring until the 2-aminoterephthalic acid is completely dissolved to obtain a mixed solution; slowly dropwise adding the urea solution into the mixed solution, and stirring to obtain a reaction solution; carrying out heat preservation after the reaction solution is heated, cooling, centrifuging, washing precipitates, and carrying out centrifugal separation to obtain a first product; and dispersing the first product into N, N-dimethylformamide, stirring, carrying out centrifugal separation to obtain a second product, dispersing thesecond product into methanol, stirring, carrying out centrifugal separation, and carrying out vacuum drying to obtain the water-soluble metal organic framework composite material. The composite material is used for detecting the fluorine ion concentration in water. The fluorescent probe prepared by the preparation method has a nanosheet microstructure, is easy to store, and has excellent solubility and good stability in water.

The invention relates to a two-dimensional layered germanium-vanadium-oxygen cluster compound and a synthesis method and application thereof.The chemical formula of the germanium-vanadium-oxygen cluster compound is [Zn (en) (H2O)] 4 [Zn (en) 2] 2 [Ge6V15O48]. 4.5 H2O. The preparation method of the germanium-vanadium-oxygen cluster compound comprises the steps that NH4VO3, GeO2, Zn (Ac) 2.2 H2O, terephthalic acid and 1, 2, 4-triazole are put into a polytetrafluoroethylene lining, then ethylenediamine and H2O are added, stirring is conducted for 20-35 min, and a mixed solution is obtained; and the mixed solution is placed in an oven at 140-180 DEG C to react for 3-6 days, cooling to room temperature, washing with distilled water, and filtering are carried out to obtain brown flaky crystals, namely the two-dimensional layered germanium-vanadium-oxygen cluster compound. The germanium-vanadium-oxygen cluster compound has antiferromagnetism, is a potential magnetic storage material, and can be applied to preparation of some magnetic materials.

The invention relates to the field of chemical materials, in particular to wheatstrawplant fibersynthetic resin and a preparation process thereof. The wheatstrawplant fibersynthetic resin is prepared from the following raw materials: wheat-straw powder, Chinese insect wax, agar, terephthalic acid, potato starch, propanediol, balsam powder,poly-hydroxy butyrateand polylactic acid fiber. The preparation process comprises the following steps of (1) preparing fine particlewheat straw powder; (2) preparing a primary mixed material; (3) preparing wheat straw fiber powder; (4) preparing a mixed adding material; (5) uniformly stirring the mixed adding material and the polylactic acid fiber; then, performing blending extrusion and injection moulding; obtaining the wheat straw plant fiber synthetic resin. In order to avoid the waste of resources such as crop waste materials, the crop waste materials are fully utilized; the environment pollution is reduced; the production cost is low; the application is very wide; the rural resource advantage can be realized; an effective method and path areprovided for reasonable utilization of waste crops.

The invention relates to a heat-resistant polyester plastic degrading enzyme and application thereof. An amino acid sequence of the heat-resistant polyester plastic degrading enzyme provided by the invention is as shown in SEQ ID No.1; and a sequence of a coding gene is as shown in SEQ ID No.2. Pichia pastoris engineering bacteria constructed by utilizing the sequence of the coding gene can efficiently secrete and express the heat-resistant polyester plastic degrading enzyme. The degradation efficiency of the heat-resistant polyester plastic degrading enzyme on polyethylene glycol terephthalate reaches 70% or above within 8 days at 65 DEG C, and degradation products are mainly terephthalic acid, monohydroxyethyl terephthalate and other monomers; the degradation efficiency of the heat-resistant polyester plastic degrading enzyme on poly(butylene adipate terephthalate) is 91% or above within 35 hours at 65 DEG C, and degradation products are terephthalic acid, butylene glycol, adipic acid and dibasic butylene terephthalate. The heat-resistant polyester plastic degrading enzyme can be effectively applied to biological treatment and monomer recycling of polyester plastic.