1018results about How to "Post-processing is simple" patented technology

The invention belongs to the technical field of medicine synthesis, and discloses a method for synthesizing linaclotide by three pairs of total selectively formed disulfide bonds. By using the process, formation of three pairs of disulfide bonds in linaclotide can be sequentially completed in the same solution system, so that the operation method of the process is simple, the yield of final fine peptide of linaclotide can be greatly increased, and large-scale production can be realized.

The present invention relates to a high polymer material chain extender and a preparation method thereof, the components and the contents (weight parts) of the chain extender include: 50 to 75 parts of styrene monomer, 50 to 25 parts of acrylic acid glyceryl ester monomer, 0.1 to 1.2 parts of initiator, 0.1 to 1.0 part of dispersant and 0.1 to 0.3 part of other additives; the preparation method of the chain extender comprises that the reaction monomers and the additives are chosen, the monomers and the additives are added into a reactor according to a set sequence and a copolymerization reaction is carried out under the appropriate temperature and the stirring speed; the final product can be formed by washing and drying the reaction product. Compared with the prior art, the present invention is characterized by simple process, relative higher molecular weight, easy post-treatment, safety, reliability, broader usage and so on.

The invention discloses a construction support and method for an overhead large-span heavy-duty cross beam. The construction support comprises a lower bracket supporting structure, an upper bracket supporting structure located above the lower bracket supporting structure, and a middle supporting structure with the bottom supported on the lower bracket supporting structure. The top face of the upper bracket supporting structure is flush with the top face of the middle supporting structure, and the upper bracket supporting structure and the middle supporting structure form a temporary supporting platform for supporting the cross beam to be constructed. A load bearing structure is erected on the temporary supporting platform. The construction method comprises the steps that firstly, the lower bracket supporting structure is installed; secondly, the upper bracket supporting structure and the middle supporting structure are installed; thirdly, the load bearing structure is erected; fourthly, the support is prepressed; fifthly, the upper cross beam is constructed; and sixthly, the support is removed. According to the construction support and method, design is reasonable, construction is easy and convenient, the using effect is good, and the problems that as for an existing floor steel pipe supporting system, cost is high, the erection process is complex, the construction period is long, the construction risk is high, the requirement for supporting stability is high, and the construction progress of the upper cross beam is affected can be effectively solved.

The invention discloses a dedusting device and a dedusting method therefor. The dedusting device is a cyclone dedusting device with a water atomization device. The dedusting device mainly comprises a cyclone dust collector and also comprises the water atomization device. A water mist outlet of the water atomization device is communicated with the interior of a mixing chamber. An upstream part of the mixing chamber is communicated with a waiting gas pipe. A downstream part of the mixing chamber is communicated with an air inlet of the cyclone dust collector. The water atomization device adopted by the invention is an electroacoustic transduction supersonic atomizing device, and sizes of liquid drops produced by the water atomization device are less than or equal to 5.0 micrometers.

The invention belongs to the field of organic synthesis, and in particular relates to a synthesis process of 4, 4'-dichlorodiphenyl sulfone. The synthesis process comprises the following steps: firstly, performing a Friedel-Crafts reaction on sulfoxide chloride and chlorobenzene under the action of a catalyst; cooling and hydrolyzing -after the reaction; heating and dissolving ; cooling, separating out crystals and filtering so as to obtain 4, 4'-dichlorodiphenyl sulfoxide; dissolving 4, 4'-dichlorodiphenyl sulfoxide in glacial acetic acid, adding hydrogen peroxide for an oxidizing reaction; lowering the temperature and cooling after the reaction is completed, and filtering so as to obtain 4, 4'-dichlorodiphenyl sulfone. Chlorobenzene is used both as a reaction material and a solvent, and other solvent impurities are not mixed in chlorobenzene, so that after-treatment is easier when the cost is saved, and the product is high in purity. The synthesis process has the advantages of simple process, low cost and few impurities. The obtained product has high purity and has the content of above 99.2% and the yield of above 90%, so that the product is good in economic benefit and is suitable for industrial production.