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65results about How to "Reduce Occupational Injuries" patented technology

Industrialized production method of high-purity pemetrexed disodium

The invention provides an industrialized production method of high-purity pemetrexed disodium, comprising the following steps of: (1) adding crude pemetrexed disodium into a reactor, adding water and stirring to dissolve at a temperature of 10-30 DEG C; (2) adding tetrahydrofuran or acetonitrile serving as a dissolvent into the reaction solution of the step (1), dissolving out a part of solids, adding kieselguhr or silica gel and stirring for 5-30 minutes; and (3) filtering the reaction solution of the step (2), adding dissolvent same as the dissolvent added in the step (2) into filtrate, crystallizing for 0.5-10 hours at a temperature of 10-30 DEG C, isolating solids, and drying for 0.5-10 hours at a temperature of 20-40 DEG C to obtain the high-purity pemetrexed disodium. By means of the production method, the shortcomings that in the prior art column chromatography, purification and heating are needed, the product purity is low, the operation is cumbersome and the industrialized production is difficult to realize are overcome; the production method is simple and convenient for operation, is easy to realize the industrialized production and has the advantages of few consumption of dissolvent, energy saving, environmental protection and low labor intensity; and the products have the advantages of white color, high purity, less than 0.05% of impurities in a single product and good stability.
Owner:NANJING HAIRUN PHARM CO LTD

Energy-saving high-performance dry-process calcium hydroxide production line

The invention discloses an energy-saving high-performance dry-process calcium hydroxide production line. The production line comprises a material delivery device, a digestion device, a powder selecting device, a water source supply device and a PLC control system; the material delivery device is connected with the inlet of the digestion device by use of a conveying mechanism; the digestion device is provided with at least three digesters orderly connected with one another, and the outlets and the inlets of the adjacent digesters are orderly communicated with each other; a dust remover and a heat conversion system for digesters are arranged in the water source supply device; the water outlet of the heat conversion system is communicated with the water inlet of the primary digester; the powder selecting device comprises a powder selector and a dust remover for the powder selector; the feeding hole of the powder selector is communicated with the discharge hole of the digestion device via a conveying mechanism; the discharge hole of the powder selector is divided into a powder outlet and a slag outlet; the air outlet of the powder selector is connected with the air inlet of the dust remover for the powder selector; the discharge hole of the dust remover for the powder selector is communicated with a finished product output mechanism. According to the energy-saving high-performance dry-process calcium hydroxide production line, the purity of the finished product is improved, environmental pollution caused by accidental leakage during production can be prevented, the energy is saved, the emission is reduced, the automation degree is high and no production personnel is needed; in short, the production line conforms to the national environmental protection policy intention.
Owner:洛阳钙丰工贸有限公司

Automatic paint spraying system

The invention discloses an automatic paint spraying system comprises a circulating conveying device and a paint spraying mechanism which is arranged on one side of the circulating conveying device. The paint spraying mechanism comprises a dynamic spray gun and a static spray gun which are arranged side by side. The dynamic spray gun is driven by a spray gun driving device to do vertically reciprocating motions. The static spray gun is fixed on one side of the circulating conveying device. A workpiece loading seat is mounted on the circulating conveying device and, under driving of a rotation mechanism, rotates when moving on a relative position of the paint spraying mechanism. A paint mist recycling system is arranged on one side of the circulating conveying device. The automatic paint spraying system is simple in structure, convenient to operate, efficient in paint spraying and high in paint use ration. Compared with the manual paint spraying, the automatic paint spraying system has the advantages that work efficiency is improved by 30 times, spray mist discharging is decreased by 70% or above, the paint use ration is increased by 3 times or above, live environment of the paint spraying plants is greatly improved, and occupational damages and skill requirements for the operator are reduced.
Owner:CHONGQING CHENGYUAN MACHINERY

Human body cold stress fine grading evaluation system in low-temperature operation environment

The invention provides a human body cold stress fine grading evaluation system in a low-temperature operation environment. The system comprises the following steps of selecting metabolic rate values which accord with actual labor intensity and labor types of human bodies from an established metabolic rate database; selecting dynamic thermal resistance and moisture resistance values of clothes according with the actual environment from the established dynamic thermal and moisture resistance database of clothes and substituting the values into the system; calculating time-varying core temperature, local skin temperature and average skin temperature of human bodies in the low-temperature cold environment through the established human body cold stress partition fine prediction model. Comparedwith index thresholds of different cold stress stages, cold stress level of human bodies is evaluated. Therefore, acceptable longest exposure time for human bodies is determined, measured value is more accurate, predictability is good, guidance is provided for selecting appropriate emergency equipment according to the cold environment and reasonably arranging organization and production strategiesin the cold environment. Theoretical basis and guidance are provided for reduction of occupational injuries in China, personnel cold stress risk is reduced, and personnel life safety is protected.
Owner:CHINA UNIV OF MINING & TECH (BEIJING) +1

Industrialized production method of high-purity pemetrexed disodium

The invention provides an industrialized production method of high-purity pemetrexed disodium, comprising the following steps of: (1) adding crude pemetrexed disodium into a reactor, adding water and stirring to dissolve at a temperature of 10-30 DEG C; (2) adding tetrahydrofuran or acetonitrile serving as a dissolvent into the reaction solution of the step (1), dissolving out a part of solids, adding kieselguhr or silica gel and stirring for 5-30 minutes; and (3) filtering the reaction solution of the step (2), adding dissolvent same as the dissolvent added in the step (2) into filtrate, crystallizing for 0.5-10 hours at a temperature of 10-30 DEG C, isolating solids, and drying for 0.5-10 hours at a temperature of 20-40 DEG C to obtain the high-purity pemetrexed disodium. By means of the production method, the shortcomings that in the prior art column chromatography, purification and heating are needed, the product purity is low, the operation is cumbersome and the industrialized production is difficult to realize are overcome; the production method is simple and convenient for operation, is easy to realize the industrialized production and has the advantages of few consumptionof dissolvent, energy saving, environmental protection and low labor intensity; and the products have the advantages of white color, high purity, less than 0.05% of impurities in a single product andgood stability.
Owner:NANJING HAIRUN PHARM CO LTD

Counterweight manual desktop lifting device and counterweight manual desktop lifting method adaptive to sitting and standing alternation

The invention discloses a counterweight manual desktop lifting device and a counterweight manual desktop lifting method adaptive to sitting and standing alternation. The counterweight manual desktop lifting device and the counterweight manual desktop lifting method are used for solving problems of complicated structures, high energy consumption and maintenance cost and expensiveness or problems of low lifting speeds and time and labor wastage of existing desktop lifting devices. The counterweight manual desktop lifting device comprises a desktop, a counterweight, a drive and a support. The desktop refers to an object required to be lifted, the counterweight refers to an article which is configured to keep balance with the desktop, the drive refers to a portion which is connected with the desktop and the counterweight and is used for transmitting acting force of a user, and the support refers to a structure which supports the desktop, the counterweight and the drive. The counterweight manual desktop lifting device and the counterweight manual desktop lifting method have the advantages that balance states are established between the desktop and the counterweight by the aid of equal or equivalent weight via the drive, so that the desktop can remain at a certain altitude without actions of external force; the user can easily lift the desktop to an appropriate altitude within a few seconds by means of slightly exerting hand power when using the counterweight manual desktop lifting device; the lifting speeds can be obviously increased by the aid of the counterweight manual desktop lifting device, the health level and the work and learning efficiency of sedentary populations such as students, white-collar workers and customers of internet cafes can be improved, expenditures can be reduced relatively, and environments can be beautified relatively.
Owner:闫锦绣 +1
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