78results about How to "Avoid the risk of safety accidents" patented technology

The invention relates to a ropivacaine mesylate freeze-dried powder injection which consists of ropivacaine mesylate and a PH regulator and is prepared by using the following freeze drying method: (1) a section quick-freezing stage: keeping bulked ropivacaine mesylate solution at the temperature of 0 DEG C for 10-30 minutes, and then keeping the bulked ropivacaine mesylate solution at the temperature of minus 35 DEG C-minus 45 DEG C for 1-2 hours; (2) a lyophilization stage: heating to 0 DEG C under the vacuum degree of 10-20 Pa and at the speed of 2-10 DEG C / h, and then keeping the temperature for 1-3 hours; and (3) a desorption drying stage: heating to 30 DEG C under the vacuum degree of 0-10 Pa and at the speed of 5-10 DEG C / h and keeping the temperature for 2-5 hours. The freeze-dried powder injection provided by the invention has the advantages of high yield, good re-dissolubility, more stable quality and the like.

The invention relates to a drug-loaded embolism microsphere with a developing function and a preparation method thereof, and belongs to the technical field of medical instruments. The preparation method of drug-loaded embolism microsphere with the developing function under X-rays comprises the following steps of step 1, preparing a reversed-phase suspension polymerization oil phase; step 2, preparing an aqueous phase of a reversed-phase suspension polymerization system; and 3, carrying out reverse suspension polymerization. The method has the advantages that iodide reacts with microsphere hostmolecules in the synthetic reaction process, a steric hindrance effect is avoided, the reaction is more sufficient, the iodine element is uniformly distributed in the microspheres, and a complete andclear development image is formed under X-ray fluoroscopy; the iodine-containing alcohol is used as an X-ray-impermeable substance, so that the safety risk caused by additional addition of an organicsolvent or addition of a toxic and difficult-to-remove organic solvent is avoided; the microspheres are high in hydrophilicity, good in expansion capacity and rapid in adsorption and drug loading capacity and high in drug loading capacity. The preparation method is simple and can be completed through one-time polymerization reaction, and grafting modification and then polymerization reaction arenot needed.

The invention discloses a preparation method for a low-resistance injector. The preparation method for the low-resistance injector comprises a core bar and a jacket. The core bar and the jacket are formed by polymethyl methacrylate through the extrusion pipe processing technology. The inner circular surface of the jacket is ground and pressed through the vacuum grinding and pressing technology, so that the accuracy error of the circular degree of the inner circle is not larger than 5 micrometers, the outer circular surface of the core bar is ground and pressed through the heat outer circle grinding and pressing technology, so that the accuracy error of the circular degree of the outer circle is not larger than 5 micrometers, and then the outer circular surface of the core bar is coated with a teflon film with the thickness not larger than 5 micrometers through the fast teflon steam film coating method. According to the preparation method for the low-resistance injector, chippings which pollute medicine liquid are avoided, the initial push-and-pull resistance of the low-resistance injector produced through the preparation method does not exceed 0.5 N, the sliding push-and-pull resistance of the low-resistance injector does not exceed 0.3 N, and the clinical application requirements can be met.

The invention discloses a preparation method of tobacco maltose caramel flavor. Maltose, which is used as a raw material, undergoes a reaction in an autoclave; and then the reaction product undergoes fractional separation. After the separation, tobacco-use quality and style features of each ingredient are analyzed and studied. On this basis, all separated ingredients are compounded and recombined so as to obtain the maltose caramel flavor with different tobacco-use effects. The maltose caramel is I-type caramel pigment, thus avoiding safety risks. In addition, the unique style of the maltose caramel is naturally harmonious with a cigarette product. The product of the invention has an extremely good application effect of enhancing style features of a cigarette product.

The invention provides a stable PGE1 lyophilized emulsion and a preparation method thereof. In particular, by adding vitamin E and refined cane sugar or glucose or a mixture composed of refined sugar and glucose according to a certain ratio, the PGE1 lyophilized emulsion is substantially improved in physical and chemical stability, and thus is capable of bearing severe variation of conditions during freeze drying. The prepared lyophilized product is plump in appearance, is white loose blocks or powder, is good in redissolving property, controllable in quality, good in reappearance and low in rejection rate; also because the usage amount of auxiliary agents is reduced, the production cost of the product is reduced, and the side effects caused by too much added lyophilized preparation auxiliary agents are overcome; and the product is relatively safe to use by patients, and the product is prolonged in validity period and reduced in requirements on production, transportation and storage conditions.

The invention discloses an ETS remote programming method which comprises an ETS terminal, a home gateway, a konnex (KNX) gateway and KNX equipment. The ETS terminal is connected with the home gateway, the home gateway is connected with the KNX gateway, and the KNX gateway is connected with the KNX equipment. The ETS terminal comprises an ETS programming device and an ETS remote assistance device. The home gateway comprises a packet forwarding device. According to the ETS remote programming method, packet forwarding of the ETS remote assistance device, the packet forwarding device and the KNX gateway is used for establishing an application layer communication link between the ETS programming device and the KNX equipment so as to achieve remote programming. The ETS remote programming method can not be limited by a network topology, and thus using is convenient. Meanwhile, security risks caused after the KNX gateway or the KNX equipment is directly surfed into a public network are also avoided.

The invention discloses an electric vehicle sliding energy recovery control method. The method comprises the steps: enabling a vehicle control unit system to recognize the driving intention of a driver as sliding; calculating the vehicle acceleration according to the vehicle speed change delta(v) in a preset fixed time period delta (T): in the sliding state, enabling the vehicle control unit system to judge whether the current road condition enters the downhill working condition or not according to the vehicle acceleration in the previous historical time period: if yes, enabling the vehicle control unit system to judge that the current road condition is the downhill working condition, increasing the torque dT on the basis of the current sliding recovery torque, and outputting a sliding recovery torque request to a vehicle electric drive system; if not, enabling the vehicle control unit system to judge that the current road condition is a non-downhill condition, and calculating and outputting the basic sliding recovery torque T0 to the vehicle electric driving system. According to the electric vehicle sliding energy recovery control method, when the vehicle goes downhill, if it is found that the sliding speed is continuously increased, the sliding energy recovery torque is increased, the energy recovery rate of the downhill sliding working condition is improved, and meanwhile the danger that the speed is continuously increased under the downhill working condition can be avoided.

The invention relates to an azithromycin taste masking pellet preparation. The azithromycin taste masking pellet preparation comprises an azithromycin taste masking pellet and a coating layer, whereinthe average particle size of the azithromycin pellets is 160 mu m-200 mu m, the azithromycin pellet contains micro-powder azithromycin, and the average thickness of coating layers is 15 mu m-120 mu m. Compared with common pellets, the azithromycin taste masking pellet well masks the bitter and foreign taste of the medicine, uses no corrigent, reduces packaging quantity of the medicine, improves compliance of children and old patients, is easy to take, and improves bioavailability. Further, the preparation method is advanced, improves product stability and quality, and is suitable for industrial mass production.

The invention discloses a file scanning preview and file uploading method for Web application, which comprises the following steps of: a Windows scanning service program is started; a WebSocket client side sends scanning information to the Windows scanning service program; the Windows scanning service program completes file scanning, and a scanned file information list is returned to the WebSocket client side; WebApi reads the returned scanned file information list to complete scanning preview of the file; and the WebApi reads the returned scanned file information list to complete file scanning data uploading. The browser compatibility problem caused by using an ActiveX plug-in in a Web application and the system security risk caused by using the ActiveX plug-in are avoided, the security setting operation of a user on the browser is removed, and the usability of software is enhanced.

The invention discloses an extensible double-row quick-plug type multifunctional liquid cooling cabinet which comprises liquid cooling cases, a quick-plug water plug, a flow distribution module, an environment monitoring module, a humidity control module, a leaked liquid collecting and monitoring module and a display module. The liquid cooling cases are divided into front and rear columns and upper and lower four layers, and have expandability. The liquid cooling case is connected with the flow distribution module through a quick-plug water plug. A leaked liquid collecting and monitoring module is arranged outside the quick-plug water plug. When liquid leaks, the liquid can be discharged through the liquid discharge pipeline and accurate liquid leakage position information is reported, theenvironment monitoring module monitors the temperature and humidity state in the cabinet, the humidity control module dehumidifies the interior of the cabinet, and the temperature and humidity in thecabinet and the liquid leakage information are displayed and alarmed on the display module on the front door. The liquid cooling case is low in positioning precision requirement, high in reliabilityand convenient for front maintenance, and integrates multiple functions of humidity control, leaked liquid collection and monitoring, state display, fault alarm and the like.

The invention discloses a high-speed online cross-shaped detecting and deviation correcting device and a detecting and deviation correcting method using the same. The high-speed online cross-shaped detecting and deviation correcting device comprises a plurality of circular knife machine tables, the ends of four mounting shafts are mounted on the side surfaces of racks of every two adjacent circular knife machine tables, the four corners of a base plate are each provided with a mounting shaft in a shaft sleeve manner, the upper end of the side surface of the base plate is connected with a CCD detecting portion through a slide rail and slider, and the lower end is provided with a detecting table and a backlight through a slide rail and slider; the center of the detecting table is provided with a glass support plate, and a material strip is output through a winding and unwinding roller and is moved on the detecting platform in a fixed-distance manner; and a high-speed camera takes pictures to collect data and transmits the data to an industrial personal computer, and the industrial personal computer analyzes data deviations to control the adjustment positions of the circular knife machine tables. The high-speed online cross-shaped detecting and deviation correcting device and the detecting and deviation correcting method have the advantages that automatic detecting and deviation correcting are carried out, the detection precision is high, human factor errors are avoided, the production efficiency is high, the die-cut yield is high, and safety is high.

The invention provides a security certificate method of a femtocell base station and a femtocell wireless communication system. The method comprises the following steps that: a certification authority issues a private key of an SG to the SG and issues a certificate to an SIM card, and the certificate comprises a public key corresponding to the private key; the SIM card generates a first random number to carry out base station certification on the femtocell base station; after the base station certification is passed, the SIM card generates a second random number and carries out gateway certification on the SG based on the private key and the public key; after the gateway certification is passed, the SG establishes an IPsec channel between the femtocell base station and the SG. According to the method and the system, the certificate is not needed to be solidified in the femtocell base station, thus when the certificate is needed to be replaced, only carrying out off-line non-real-time updating on the private key in the SG and the SIM card which is internally installed with a new certificate is required, thus a problem of replacing the certificate is solved, and the convenience of certificate replacement is realized.

The invention discloses a method for safety protection of passengers during starting of a vehicle. The method comprises the following steps: when the vehicle starts, receiving a vehicle speed signal, a gear switch signal, a brake signal and a vehicle door position signal, and comparing the vehicle speed signal, the gear switch signal, the brake signal and the vehicle door position signal with preset corresponding signals by an ECU (Electronic Control Unit); after the condition that the vehicle is simultaneously positioned in a parking state and a vehicle door opening state is judged, receiving operation information of current finished vehicle accessories, calculating total power required for maintaining the operation of the current finished vehicle accessories, transmitting an instruction to an engine, and driving the engine to operate at the total power by the ECU, thereby performing safety protection on the passengers. The invention provides a safe and reliable finished vehicle application scheme for protecting the passengers; by using the application scheme, the finished vehicle can meet the service demands of various accessories on site, and the condition that the passengers are thrown out to cause accidents because the vehicle is started when the vehicle door is not closed can be better prevented.

The invention relates to a ropivacaine mesylate freeze-dried powder injection which consists of ropivacaine mesylate and a pH regulator and is prepared by using the following freeze drying method: (1) a section quick-freezing stage: keeping bulked ropivacaine mesylate solution at the temperature of 0 DEG C for 10-30 minutes, and then keeping the bulked ropivacaine mesylate solution at the temperature of minus 35 DEG C-minus 45 DEG C for 1-2 hours; (2) a lyophilization stage: heating to 0 DEG C under the vacuum degree of 10-20 Pa and at the speed of 2-10 DEG C / h, and then keeping the temperature for 1-3 hours; and (3) a desorption drying stage: heating to 30 DEG C under the vacuum degree of 0-10 Pa and at the speed of 5-10 DEG C / h and keeping the temperature for 2-5 hours. The freeze-dried powder injection provided by the invention has the advantages of high yield, good re-dissolubility, more stable quality and the like.

The invention discloses a construction method for open dredging and underground excavation integral lining. The construction method comprises the following steps of S1, temporarily stopping part of railway tracks or occupying highway roads section by section, and adopting rapid pile forming to construct a vertical enclosure; S2, constructing a top plate support to restore the occupied highway roads or the disused railway tracks; S3, repeating the steps S1 and S2; S4, carrying out underground excavation in-tunnel excavation earthwork from the two transverse sides of the highway roads or railwaytracks; S5, leveling the tunnel enclosure and the tunnel roof surface after excavation; S6, performing tunnel waterproofing treatment, binding reinforcing steel bars, and constructing a main body structure; and S7, backfilling earth and rock between the main body structure and the top plate support, and performing grouting through reserved grouting holes after backfilling is completed to ensure backfilling compactness. The construction method avoids the disadvantages of long-time-lane-occupation construction when compared with the existing conventional open dredging construction, overcomes the defects of insufficient initial support rigidity and the must of section-by-section excavation when compared with the conventional underground excavation construction, and improves settlement control performance and safety.

The invention discloses a preparation method of human-derived copper-zinc superoxide dismutase. The preparation method includes: inserting a sequence as shown in SEQ ID No. 2 into an original carrierto build a recombinant carrier, performing expanding culture, then extracting an expression product, performing N-His-TEV-hSOD1 enzymolysis, and purifying to obtain hSOD1. The preparation method has the advantages that the target gene sequence is designed according to codon preference, a His-TEV label is added to the N tail end, and expression heterology is avoided while the safety risks of animalor human sources are avoided; the His purification label and the TEV recognition site of the label is removed during sequence design, purification is benefited, and the His label can be removed conveniently to meet the requirements of pharmaceutical protein; the expression of the hSOD1 expressed by an expression strain is soluble expression, expression quantity is increased evidently when Cu<2+>and Zn<2+> are added for induction, and the requirements of large-scale production are satisfied.

The invention belongs to the technical field of tobacco flavors, and particularly relates to a caramel flavor for tobacco under a negative pressure condition and a preparation method thereof. The method comprises: preparing a reaction solution from sugar and propylene glycol, and carrying out caramelization under a negative pressure condition. Through the method, an I-type caramel pigment is prepared without nitrogen-containing compounds, so that the safety risk is avoided, the prepared caramel flavor can increase the smoke concentration, improve the smoke quality, reduce irritation and improve the oral aftertaste, and meanwhile cigarette products are endowed with caramel fragrance characteristic styles.

The invention discloses an anti-overcharge low-temperature electrolyte and a lithium ion battery based on the same, and belongs to the technical field of lithium ion batteries. The anti-overcharge low-temperature electrolyte comprises an organic solvent, a lithium salt, a low-impedance film-forming additive and an anti-overcharge additive, wherein the organic solvent comprises a carbonic ester solvent and a linear carboxylic ester solvent; the lithium salt comprises one or more of lithium hexafluorophosphate, lithium difluorophosphate, lithium tetrafluoroborate and lithium difluoro (oxalato) borate; the low-impedance film-forming additive is at least two of vinylene carbonate, 1, 3-propane sultone and ethylene sulfite; the anti-overcharge additive is 1, 4-di-tert-butyl-2, 5-dimethoxybenzene, wherein the content of the organic solvent is 78 wt%-82 wt%, the content of the lithium salt is 15 wt%-18 wt%, the content of the anti-overcharge additive is 1 wt%-2 wt%, and the balance is the low-impedance film-forming additive. The lithium ion battery solves the safety problem caused by low discharge capacity and even incapability of discharging of the existing lithium ion battery at low temperature and over-charge and over-discharge.

The invention aims at constructing a model which can quickly predict I-period area under the curve (AUC) of drugs in human body through physicochemical properties of quinolones compounds and has good predicting capability. Construction is carried out primarily by using a method of stepwise multiple linear regression combined with curve fitting. In the final AUC model, significant independent variables comprises mole volumes MV of these compounds, alkaline degree of dissociation of 7- substituent group on nuclear parent (pka2) and quadratic of the pka2 ((pka2) <2> ). According to the prediction model provided by the invention, the predicting capability of the constructed model reaches over 80%, so the constructed model has excellent predicting effect. Through early predictions of the AUC of quinolones new drugs, the drugs without pharmacokinetic property can be reduced for clinical test, thereby decreasing time and money wastes, and accelerating research and development of such drugs.

The invention relates to a detection device for the original water tank liquid level of an RO water purification machine. The detection device comprises an original water tank (1), a filter element assembly (2), a booster pump (4), a reverse osmosis RO film (6) and a water purification tank (6) which are connected in sequence through pipelines, a signal amplifier (7) and a control panel (8). A liquid level meter (9) is mounted inside the water purification tank, the input end of the signal amplifier is connected with the booster pump, the output end of the signal amplifier is connected with the control panel, the booster pump is connected with the control panel through a current signal line, and the liquid level meter is connected with the control panel through a liquid level meter signal line (11). The invention also provides a detection method of the detection device, the liquid level of the original water tank is judged by detecting the current magnitude of the booster pump, and the liquid level meter does not need to be mounted in the original water tank any longer, so that the structure of the original water tank is optimized, the risk of accidents caused by the failure of a traditional liquid level meter is avoided, and the cost of the whole machine is reduced.

The invention relates to a fastener monitoring device, which comprises a shell, a multi-segment connecting line and a host computer, wherein the shell is used for being connected with the end part ofa fastener so as to monitor the connection state of the fastener; the multi-segment connecting line connects the host computer and the shell so as to form a closed loop, and the connecting line is connected with the shell through detachable connection; and the host is used for monitoring whether there is an open circuit in the loop or not. The invention further relates to a bolt monitoring deviceand a fastener monitoring method. According to the scheme of the invention, reliable, real-time and automatic detection can be performed on fasteners such as bolts without being restricted by the installation mode and position of the fasteners.

The invention discloses a vehicle wheel clamping device, including a C-shaped clamping supporting column, a base and a controller. The clamping device includes two L-shaped vehicle wheel fixed mechanisms and an electric two-way telescopic cylinder; the one ends of the fixed mechanisms of the two L-shaped vehicle wheels are connected by a cylinder core of the electric two-way telescopic cylinder, and the other endsare suspended and used for clamping rear wheel hubs of a vehicle; the base is internally provided with a cavity body used for installing the C-shaped clamping supporting column; a first side surface of the base is provided with a first limited sliding groove, a second side surface of the base is provided with a second limited sliding groove, and the C-shaped clamping supporting column is connected with the base through the first limited sliding groove and the second limited sliding groove; a front wheel parking indicator line is arranged on an upper cover plate of the base; the C-shaped clamping supporting column is electrically connected with the controller through the electric two-way telescopic cylinder; and the technical problems that when parking, an existing vehiclefixes the vehicle through a handbrake, the risk of safety accident occurrence exists, and the use of hinges and other fixed parts to fix the vehicle has a low degree of automation and is not beneficial to being promoted are solved.

The invention provides glucagon-like peptide-1 (GLP-1) analog monomer peptides. The monomer peptides have the general formula 1: Z1HAX1GTFTSDVSSYLE X2QAAKEFICWLVKGRX3, wherein Z1 is hydrogen, acetyl or trifluoroacetyl; X1 is Met, Leu, Pro, Phe or Tyr; and X2 is Gly, Glu or Aib (2-aminoisobutyric acid). The invention also provides a dimer formed by the monomer peptides, a preparation method of the dimer, and application of the dimer in preparing drugs. The dimer of the GLP-1 analog monomers provided by the invention has the obvious effect of lowering the blood sugar, and the in vivo half life can reach 12-72 hours or above, thereby solving the problem of short half life in the natural GLP-1, and greatly enhancing the clinical application compliance.

The invention discloses a method for automatically unlocking Windows through software. The method comprises the steps that firstly, a cloud expansion Windows screen unlocking service is installed, and after installation succeeds, a'cloud expansion Windows screen unlocking service 'is additionally provided on a screen locking login interface; 2, in the RPA writing process, the unlocking assembly is placed in a needed place; and step 3, when the process runs, if the computer is in a screen locking state, the cloud expansion Windows screen unlocking service begins to poll and check the credential, if the credential exists, Windows unlocking is triggered, and if the provided user name and password are correct, Windows unlocking succeeds, and if the provided user name and password are wrong, prompt information of login failure is seen on a screen locking login interface. The method is free of intervention, high in reliability, capable of reducing cost input and suitable for all Windows users of a local machine, and the problem that login cannot be achieved if biological recognition information is not input in the early stage is solved.

The invention provides a long-acting glucagon-like peptide-1 analogue dimer. The long-acting glucagon-like peptide-1 analogue dimer is characterized in that the dimer is formed by two glucagon-like peptide-1 analogue monomers, the glucagon-like peptide analogue-1 monomer is shown as a general formula Z1HX1EX2TFTSDVSSYLEGQAAKEFIX3WLVKX4RG, wherein, Z1 is H, acetyl or trifluoroacetyl; X1 is Ala, Leu, Val, Gly, Ile; X2 is Gly, Cys; X3 is Ala, Cys; and X4 is Gly, Aib. The long-acting glucagon-like peptide-1 analogue dimer has long-acting hpyerglycemic effect, can increase the clinical medication compliance, is highly homologous with endogenous GLP-1(7-37), and can avoid the security risk.

The invention provides a battery module with high safety, a battery pack and a battery cluster. The battery module comprises a base, an upper cover and a plurality of battery cell groups, wherein allthe battery cell groups are arranged between the base and the upper cover, an acquisition plate is arranged on the upper cover, and the acquisition plate is electrically connected with all the batterycell groups. According to the battery module with high safety, the battery pack and the battery cluster provided by the invention, the risk of safety accidents caused by short circuit of the cable isavoided, the length of a cable between the battery module and the battery management unit is reduced, the space utilization rate is improved, the box body material of the battery pack is arranged tobe the metal plate, reinforcing ribs are arranged, so that the battery packs can be directly stacked, a mounting frame in the prior art is saved, and the purposes of saving materials, reducing the cost, simplifying the structure, reducing the engineering quantity of mounting construction and reducing the weight of the whole energy storage system are achieved.

The embodiment of the invention provides a relay inner and outer insulation resistance value acquisition method and device. The method comprises steps: an insulation resistance value acquisition circuit is controlled to output low-frequency AC signals; when both a main relay and a pre-charge relay are cut off, based on the low-frequency AC signals, the inner insulation resistance value of the mainrelay is acquired; when the inner insulation resistance value of the main relay is normal, the pre-charge relay is controlled to be closed; and when the main relay is cut off and the pre-charge relayis closed, based on the low-frequency AC signals, the outer insulation resistance value of the main relay is acquired. Thus, the technical scheme provided by the embodiment of the invention can acquire the inner and outer insulation conditions of the main relay so as to solve the problems that the inner and outer insulation conditions of the main relay cannot be acquired when the main relay is cut off in the prior art and the safety risk is further caused.

The invention discloses a vehicle remote diagnosis method and system, a readable storage medium and equipment. The method comprises the steps that a connection device queries whether wired connection is established with a to-be-diagnosed vehicle, and if not, a query request is sent to a cloud; the cloud receives the query request and feeds back a VIN code verification instruction to the connection device; the connection device sends the VIN code of the to-be-detected vehicle to the cloud; the cloud calls the vehicle data of the to-be-diagnosed vehicle according to the VIN code information and opens a primary diagnosis permission of the to-be-diagnosed vehicle to the connection device, and when the connection device sends an advanced diagnosis permission request to the cloud, the cloud inquires the positioning information of the to-be-diagnosed vehicle and compares the positioning information with positioning information of the connection device; if the information is located in the same region, the cloud feeds back an authority key to the to-be-detected vehicle; and the to-be-diagnosed vehicle calls the diagnosis data and feeds the diagnosis data back to the connection device. The beneficial effects of the invention are that the diagnosis of the vehicle is realized by establishing the remote interconnection between a diagnosis device and the to-be-diagnosed vehicle.

The invention relates to redispersible polyacrylic acid resin powder and a preparation method thereof. The polyacrylic acid resin powder has a property of being re-dispersed in water to form aqueous dispersion; the viscosity of the aqueous dispersion at 20 to 30 DEG C is 60 to 80 mpa.s and the average grain diameter of the aqueous dispersion is 200 to 400 nm; the preparation method comprises the steps of obtaining resin emulsion by utilizing a polymer monomer, an emulsifying agent and potassium peroxodisulfate (or ammonium persulfate) by an emulsion polymerization method, adding alkali to partially neutralize the carboxylate radical of the polymer of the resin emulsion and performing spray drying on the partially neutralized resin emulsion to prepare the redispersible polyacrylic resin powder. Due to the preparation method provided by the invention, sewage discharge is reduced and production cost is reduced. The redispersible polyacrylic acid resin powder prepared by the method has the property of being re-dispersed in water to form aqueous dispersion with viscosity, so that the safety risk caused by use of an organic solvent is avoided, and cost is reduced.

The invention discloses a ropivacaine mesylate freeze-dried powder injection for injection. The freeze-dried powder injection is prepared from 89.4 g of ropivacaine mesylate and 50 g of mannitol by adding ethanol water with mass percentage concentration of 5-10% till 1000 mL. The freeze-dried powder injection is good in product appearance, high in yield, good in redissolvability and high in clarity.