5 results about "Direct process" patented technology

The present invention discloses a method for continuously co-producing HFO1234ze and HCFO1233zd (E, Z), which comprises the following steps: using a catalyst, HF and R240fa as the bottom materials, wherein the catalyst includes an amine catalyst and a co-catalyst, controlling the reaction temperature and pressure in the reactor, and then continuously introducing HF and R240fa for fluorination reaction, and continuously extracting the products containing HFO1234ze and HCFO1233zd (E, Z). By introducing the amine catalyst and the co-catalyst, the present method constructs a homogeneous near-ionic liquid system, enabling the full fusion of the organic phase and the inorganic phase, improving the reaction efficiency, having a high total product yield, having a simple and direct process route, having an advantage in industrial production cost, having the reaction products and intermediates mainly existing in the form of olefin compounds, reducing the by-products of the fluorination reaction, reducing the purification difficulty and the equipment cost, and having a continuous, stable, safe and controllable reaction process.

The invention discloses Q355C-grade low-temperature-resistant angle steel and a production method thereof. The Q355C-grade low-temperature-resistant angle steel comprises the following chemical components in percentage by weight: 0.16 to 0.20 percent of C, 0.25 to 0.40 percent of Si, 1.20 to 1.50 percent of Mn, 0.020 to 0.038 percent of V, less than or equal to 0.025 percent of P, less than or equal to 0.025 percent of S, 0.40 to 0.44 percent of CEV, 0.0050 to 0.0080 percent of N and the balance of Fe and inevitable impurities. The production method comprises the steps of converter smelting, continuous casting, heating and profile steel rolling. The Q355C-grade angle steel with the 0 DEG C impact property larger than or equal to 34 J can be produced under the straight process condition, the upper yield strength ReH of the angle steel is larger than or equal to 365 MPa, the tensile strength Rm is larger than or equal to 530 MPa and smaller than or equal to 600 MPa, and the percentage elongation after fracture A is larger than or equal to 22%.

The invention relates to a method according to claim 1, in which nitric acid, as a direct process product of a nitric acid production process, comprising the following steps: a) providing hydrogen (5d) and oxygen (5b) by electrolysis (5) of water in an electrolysis unit, in which electricity (10) from renewable energy sources and water (5c) are used; b) providing ammonia (21b) as a process product of the reaction of at least nitrogen (21a) and hydrogen (5d) from the electrolysis (5) of said water in the ammonia synthesis (21); c) producing nitric acid (22) by reacting previously provided ammonia (21b) with at least an oxygen-containing gas (5e) in a nitric acid production (22), used for the production 22 of organic amino compounds (17) for the synthesis of organic isocyanate compounds. Also described herein are methods of incorporating the present methods into the preparation of organic isocyanate compounds from these organic amino compounds, and an apparatus for implementing the corresponding methods.

The invention provides a nano Y-type molecular sieve with a high silica-alumina ratio and a preparation method thereof, and relates to the technical field of molecular sieves. The preparation method comprises the following steps: mixing a silicon source, an aluminum source, an alkali source, water, a Y-type molecular sieve seed crystal and a specific template agent to obtain initial gel, aging the initial gel, and carrying out hydrothermal crystallization on the initial gel to successfully prepare the nano Y-type molecular sieve with a silicon-aluminum ratio (Si / Al) of 6-15. According to the method, a direct method (namely a one-pot method) is adopted, namely, the molecular sieve product with the high silica-alumina ratio is directly synthesized by changing the composition of the initial gel, compared with a post-treatment method, the process is simple, and the defect that the post-treatment method easily causes skeleton defects of the high-silicon Y-type molecular sieve is overcome. The Y-type molecular sieve prepared by the invention has the advantages of high silica-alumina ratio, small particle size, uniform particle size, high crystallization degree and the like.

This invention discloses a one-step method for preparing magnetic vermiculite nanosheets, belonging to the field of vermiculite nanosheet preparation technology. The method includes the following steps: pretreating natural raw vermiculite powder to obtain pretreated vermiculite powder; dispersing the pretreated vermiculite powder in a liquid medium to obtain a reaction slurry; grinding the reaction slurry while simultaneously introducing oxidizing gas for in-situ oxidation and magnetic attenuation to obtain a post-reaction slurry; and post-processing the post-reaction slurry to obtain magnetic vermiculite nanosheets. This method achieves a one-step direct process from raw materials to a functional end product, significantly shortening the process flow, avoiding multiple separations, washing, and drying steps, significantly improving production efficiency, and greatly reducing energy and material consumption. It solves the technical problem that existing methods cannot achieve one-step preparation of magnetic vermiculite nanosheets.