39 results about "Molecular rearrangement" patented technology

Provided are a method and an apparatus based on a reactor vessel (201) that is brought to a predetermined vacuum degree, in particular said vacuum degree set between 2 and 6 absolute millibar, an to a high temperature. A waste material is continuously introduced in the vessel (202), in particular a solid waste material (5) is introduced in such a way that a vacuum loss from the vessel (201) is prevented. Owing to the high temperature, waste material (5) forms a plasma that undergoes a molecular rearrangement, which gives origin to a substantially liquid residue that is collected in a bottom portion (204) of reactor (201), and to a gas (11). The gas (11), which mainly comprises carbon monoxide, hydrogen, carbon dioxide and steam, i.e. a typical syngas composition, is continuously taken away from the vessel (201) through a duct (12), and is sent to subsequent treatments to obtain a gas fuel that can be burnt by devices such as a gas turbine, a motor or a boiler. The high temperature in reactor (201) is maintained due to a current in the form of electric discharges (20) that is established between two electrodes (21,22) below the liquid head (7). The substantially liquid residue is periodically discharged to maintain a liquid head height (7) not exceeding a reference height value H*, in such a way that air inlet into vacuum loss from the vessel (201) is prevented.

The invention discloses a preparation method of grease with a humanized structure. The preparation method comprises the following steps: carrying out intra-molecular rearrangement reaction to palm oil with palmitic acid content of higher than 50% under the action of catalyst to obtain Sn-2 locus triglyceride with palmitic acid content of higher than 50%; and carrying out ester exchange reaction to the Sn-2 locus triglyceride with palmitic acid content of higher than 50% with mixed fatty acid or non-glyceride under the action of 1,3 locus Specificity lipase, and then subjecting the reaction product to after treatment, so as to obtain the grease with humanized structure, wherein the mixed fatty acid is mixture of at least two selected from the group consisting of decanoic acid, lauric acid, myristic acid, palmitoleic acid, stearic acid, oleic acid, linoleic acid and linolenic acid. The vegetable oils are used as the raw material according to the method, so the safety is high; the preparation process is simple, the reaction time is short, the enzyme dosage is low, and the cost is low; and the prepared grease with the humanized structure is very similar to the beast milk fat in the composition of fatty acid and the structural distribution of triglyceride, so the grease can be added in infant formula or formula foods and used as breast milk fat substitute.

The invention discloses a method for preparing rosemary essential oil in a rosemary extract decolorization technique. According to the method, activated carbon used in the rosemary extract decolorization technique is used as the raw material and used for extraction by using an organic solvent, and molecular distillation is performed to recover the solvent and purify the rosemary essential oil. The method comprises the following steps: extracting with the organic solvent, filtering, and carrying out molecular rearrangement. According to the method, the leftovers in the rosemary extract preparation process are fully utilized and subjected to the simple extraction and molecular distillation techniques to obtain the rosemary essential oil of which the purity is 95% or above and the yield is 0.12-0.15%. The method fully utilizes the resources and lowers the rosemary extraction cost. The rosemary essential oil prepared by the method has equivalent quality to the rosemary essential oil sold in the market.

The invention discloses a preparation method of a homopiperazine derivative. The preparation method comprises the following steps of: (1) reacting 4-piperidone hydrochloride hydrate with an amino protective agent to prepare amino-protected 4-piperidone; (2) performing oximation reaction on the amino-protected 4-piperidone to prepare amino-protected 4-oxime piperidone; (3) performing molecular rearrangement on the amino-protected 4-oxime piperidone to prepare amino-protected 5-carbonyl homopiperazine; and (4) performing reduction reaction on the amino-protected 5-carbonyl homopiperazine to prepare amino-protected homopiperazine. The 4-piperidone hydrochloride hydrate is taken as a raw material, and is subjected to amino protection, oximation, rearrangement, reduction and deprotection to prepare the homopiperazine, and the amino-protected homopiperazine is reduced by sodium borohydride in the presence of an adjuvant to prepare the homopiperazine, so that lithium aluminum hydride which has high safety risk and cost in a preparation process of the conventional method is avoided. The whole process is easy to control, reaction conditions of each step are mild, the method is suitable forindustrial production, the yield is 75 percent, the raw material with low cost is used, and production cost is effectively reduced.

The invention relates to a sulfamate water reducing agent preparation method, which comprises: mixing phenol, alkylphenol polyoxyethylene ether, sodium para-aminobenzenesulfonate and deionized water to obtain a mixing liquid; heating the mixing liquid, adjusting the pH value of the mixing liquid to a first preset pH value, adding formaldehyde, and carrying out a hydroxymethylation reaction to obtain a first reaction liquid; carrying out a constant temperature condensation reaction on the first reaction liquid under a preset condensation temperature condition to obtain a second reaction liquid;and at a preset rearrangement temperature, adding urea to the second reaction liquid, adjusting the pH value to a second preset pH value, and carrying out a molecular rearrangement reaction to obtainthe sulfamate water reducing agent. According to the present invention, the obtained sulfamate water reducing agent has different side chains with different lengths, wherein the side chains comprisealkyl, hydroxymethyl, sodium para-aminobenzenesulfonate, phenol, urea and other groups, even the polymerization products of the groups, such that the segregation bleeding problem can be reduced, and the water reducing ability can be improved.

The invention relates to an EPSP synthase AroA-Ra multisite mutant of a rahnella aquatilis, particularly to the multisite mutant improved from the gene coded as 5- enol acetone shikimic acid-3-EPSP synthase of the rahnella aquatilis through DNA molecular rearrangement method and function complementation method, and the resistance of the improved multisite mutant to the glyphosate is greatly improved. The nucleotide sequence of the multisite mutant is as indicated by SEQ ID No1, the encoded amino acid sequence is as indicated by the SEQ ID No2, and the mutant has 6 different mutational sites under the same molecule. The multisite mutant not only retains the high affinity of the original EPSP synthase toward the PEP, but also reduces the affinity of the EPSP synthase toward the glyphosate herbicide, so that the glyphosate resistance of the mutant is greatly improved.

The invention belongs to a rusting passivator. The passivator is prepared from, by weight, 5-10 parts of acrylic emulsion, 10-20 parts of transformation accelerant tannin, 70-80 parts of penetrant isopropanol, 150-200 parts of assistant absolute ethyl alcohol, 150-210 parts of film-forming agent phosphoric acid, 20-30 parts of transformation accelerant lactic acid, 25-30 parts of butyl cellosolve and 350-425 parts of water. By means of a macromolecular composite organic acid group in the rusting passivator, rust is reduced into passivation components with the rust protection capacity, molecular rearrangement of polymeric micelle happens on a metal matrix, and film forming is achieved through crossing. A film layer has high closing performance, high rust removal performance and high adhesive force, and therefore the problem of secondary rusting of coating generated after rust removal is solved thoroughly.