7results about How to "Lower conversion rate" patented technology

This invention relates to the field of water-soluble polymer materials technology, and discloses a comb-shaped ternary polymer and its preparation process. The polyacrylamide is polymerized from a backbone monomer, anionic monomer, comb-shaped macromolecular monomer, and optional functional reinforcing monomers under the action of a redox and azo-based composite initiation system. The preparation process includes solution preparation and neutralization, deoxygenation and temperature control, adiabatic polymerization, and post-treatment steps, employing a control strategy combining low-temperature initiation and adiabatic temperature rise polymerization. This invention effectively overcomes the defects of traditional linear polymers—low viscosity retention and poor shear resistance—in high-temperature and high-salt environments by introducing comb-shaped side chains to create a steric hindrance effect. The resulting product possesses ultra-high molecular weight, low water-insoluble content, and excellent solubility, exhibiting excellent salt-resistant thickening advantages and mechanical stability, meeting the oil displacement requirements of harsh reservoir environments.

The utility model relates to the technical field of chemical catalytic reaction equipment provides a kind of for solid particle catalysis suspended state fixed bed reaction device, including reactor, solid particle catalyst layer, Reynolds number control unit and filter screen structure;Solid particle catalyst layer is filled in reactor, and its filling volume occupies 1 / 3~1 / 2 of reactor reaction zone effective volume;Reynolds number control unit is connected with reactor, and filter screen structure is arranged at the top and bottom of the reactor reaction zone.This scheme not only solves the problem of swelling blockage in the application of solid particle catalyst, prolongs the cycle of operation, and the suspended state promotes catalyst and fluid to be in full contact, prevents material short circuit, improves conversion rate, and further inhibits mechanical loss, reduces production cost.

The application provides a molecular marker related to feed conversion rate of sheep, a detection method and application thereof. Through PCR amplification and sequence analysis of a sheep GFRA2 gene, it is found that there is an A / G polymorphic site at the 196th site of the amplified fragment, further detection of the polymorphic site of 1004 Hu sheep is carried out by using KASPar primers, a least square model is established, genotype and feed conversion rate are associated, and finally it is determined that the amplified GFRA2 gene fragment can be used as a molecular marker related to feed conversion rate of sheep. The molecular marker can be used for selecting and reserving GG homozygous sheep into a core group, so as to improve the feed conversion rate of sheep and help to increase economic benefits.

The utility model belongs to solar power supply technical field especially relates to integral type solar energy aviation obstacle light circuit system, its characterized in that, MCU microprocessor connects power module, ADC light control module, isolation module, 485 communication module and GPS communication module respectively, power module connects battery anti -overcharge module, ADC light control module, isolation module, 485 communication module, GPS communication module and boost LED drive module respectively, isolation module connects boost LED drive module, boost LED drive module connects LED lamp, MPPT charging module and battery anti -overcharge module are connected with battery group respectively, and MPPT charging module still connects photovoltaic cell. The utility model has the beneficial effects that: adopt integral type solar power supply structure, reduce the problem of installation link, can be applicable to multiple use environment, can be compatible with multiple types photovoltaic cell panel, battery power supply, realize the protection of battery, also can control multiple types, quantity's LED lamps and lanterns.

The invention discloses a green preparation process of capryloyl hydroxamic acid, and relates to the technical field of fine chemical synthesis. The environment-friendly preparation process of the capryloyl hydroxamic acid at least comprises the following preparation steps: mixing and stirring hydroxylamine sulfate, sodium hydroxide and ethanol, dropwise adding ethyl caprylate, and carrying out oximation reaction to obtain a reaction mixed system; reducing the temperature of the reaction mixed system, dropwise adding concentrated sulfuric acid to adjust the pH value to 6-7, and performing solid-liquid separation to obtain sodium sulfate and capryloyl hydroximic acid mother liquor; and carrying out rotary evaporation on the capryloyl hydroxamic acid mother liquor to recover the ethanol, and carrying out fractional crystallization to obtain the capryloyl hydroxamic acid. The green preparation process of capryloyl hydroxamic acid provided by the invention has the advantages of high raw material utilization rate, strong solvent recycling reusability, high product molar yield, high purity, good chroma, light smell, good corrosion resistance, continuous production, no three wastes in the process, low temperature and normal pressure, safety, green and energy saving, and accords with the green chemical engineering concept of carbon neutralization.

The application provides a bacillus megaterium and application of the bacillus megaterium in preparation of nano selenium organic fertilizer for increasing selenium content of tea, and belongs to the technical field of microorganisms, wherein the bacillus megaterium NT2 is preserved in China Center for Type Culture Collection, and the preservation number is CCTCC NO:M 20251806; the bacillus megaterium NT2 has strong tolerance and reduction capacity to selenium elements, can survive in high-concentration inorganic selenium, and reduce the inorganic selenium into nano selenium, and has weak capacity to enrich arsenic, cadmium and lead; can be mixed with high-temperature calcination activated high-selenium rock powder to carry out mixed fermentation, to prepare a selenium source of nano selenium organic fertilizer, to increase the selenium content of tea while ensuring that the heavy metal content does not exceed the national standard. The bacillus megaterium provided by the application can reduce the toxicity of inorganic selenium in high-selenium rock and convert it into nano selenium, and can stably, safely and standardly produce selenium-rich tea, so that the heavy metal content of tea does not exceed the standard, and the application has a broad market prospect.

The application discloses a kind of catalyst and the method for directly converting synthesis gas to prepare aromatic hydrocarbon rich in benzene (B), toluene (T), dimethyl benzene (X), belongs to synthesis gas directly preparing aromatic hydrocarbon, with synthesis gas as reaction raw material, conversion reaction is carried out on fixed bed, the catalyst is composite catalyst I+II+III, three components are mechanically mixed, and the active component of component I is metal oxide I, component II is molecular sieve, and component III is molecular sieve.Reaction process has very high BTX product yield and selectivity, and aromatic hydrocarbon selectivity can reach 50-80%, and the proportion of benzene, toluene, dimethyl benzene in aromatic hydrocarbon can reach 30-80%, while by-product methane selectivity is less than 10%, with good application prospect.