The preparation of nylon6 by the method of reaction squeezing
The principle of the preparation of nylon6 by the reaction squeezing method was that in the presence of a catalyst (which promoted the production of the initiator) and a cocatalyst (which promoted the formation of the growth center of the reaction), the initiator could produce nylon6 with a relatively high molecular weight in a few minutes with a conversion rate of 90% - 95%. firstly, the caprylane reacted with the base to generate caprylane anionates, then caprylane reacted with the amine ester to generate caprylane amine ester, then the caprylane anionates attacked caprylane amine ester to generate a ring-opening reaction to generate another active anionates, the caprylane reacted with the active anionates to generate active caprylane amine ester to realize chain extension, then the caprylane ester ester was attacked by caprylane anionates to generate a ring-opening reaction, and the cycle continued. Finally, the desired relative molecular mass of the compound was obtained. Water was generated when the Caprolene reacted with the base to form the Caprolene ions. This water must be removed, otherwise the synthesis reaction would be difficult. The conversion of Caprolene to nylon6 was an exothermic reaction, and the heat of the synthesis was about 125kJ/kg. The technological process was as follows: after the apped was melted, a certain amount of base was added for dehydration, and then it was put into a twin-screw excavator together with a catalyst for reaction and squeezing. After stretching, water-cooling, air-cooling, slicing, extraction and drying, the finished product was obtained. The main equipment of the pre-experiment treatment system included a reaction kettle, a buffer tank, a vacuum pump, a main measuring pump, an auxiliary measuring pump, a heat-conducting oil circulating pump, a mixing tank, a high-level tank, etc. The heat of the reaction kettle was supplied by the heat conducting oil of the reaction kettle jacket. It was heated by an electric heating rod with a heating power of 8 Kilowatt, and the temperature was controlled by two thermocouples. The temperature control range was 150 - 180 ° C, with an error of about 2 ° C. The temperature in the reaction kettle was maintained at 140 ° C. In addition, the temperature of the vacuum pipeline and the material pipeline was also controlled. The electric heating belt was used to maintain the temperature at 150 ° C. There were 6 temperature measuring points distributed in the reaction kettle, the reaction kettle jacket, the vacuum tube, the material tube and other parts to monitor the whole process. This control system could be used for both on-site control and remote control. Read more exciting novels for free
The reaction of toothpaste squeezing into water
The surface of toothpaste usually contains a surfacing agent. When the toothpaste is squeezed into water, the water molecules will form a thin layer on the surface of the toothpaste. This is a phenomenon of surface tension, which will cause the water droplets to form a spherical shape on the surface of the toothpaste instead of spreading out. Due to the effect of the surface active agent in the toothpaste, the force between the water droplets and the surface of the toothpaste would change, and the water droplets would float for a while. Moreover, there were chemical components in the toothpaste that would react with water to produce gas, pushing the small pieces of toothpaste to "swim" on the water surface. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Terracotta reaction base glaze, preparation method and process for the same
The pottery clay reaction base glaze contains the following components in parts by mass: 20 - 25 parts of potash plagioclass, 10 - 15 parts of albite, 8 - 13 parts of limestone, 5 - 10 parts of magnetite, 10 - 15 parts of spodumene, 6.5 - 10 parts of titanium dioxide, 5 - 7 parts of calcium carbanate, and 8 - 10 parts of chalk. The preparation method is as follows: 1. The ingredients were prepared according to the quality of each component. 2. According to the mass ratio of materials: ball: water = 1: 1.6: 0.65, wet ball grinding for 12 - 14 hours, the glaze after ball grinding passes through a 160-mesh sieve, and is prepared into glaze paste with a Baume concentration of 51 - 53 for later use. 3. He took out a clean green body and sprayed the glaze. 4. The green body sprayed with the glaze was fired in a drawer kiln at 1270 ° C. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The applicable scope of the squeezing method
The squeezing method can be used to adjust the uneven settlement of non-saturated soil and to reinforce the adjacent soil during large-scale excavation or tunnel excavation. It can also be used to reinforce the foundation of existing buildings in the reconstruction of storeys. It can also be used to reinforce the foundation of sand, silt, clay, artificial fill, etc.
Reaction of the format preparation reagent and the keto
Grignard reagents were generally made by reacting an alkyi radical with metallic aluminum (usually fine wire or powder to increase the surface area) in absolute ether or in the presence of lithium ether (CHF). The preparation method was to slowly add the ether solution of a class of aromatic alcohol (commonly used class of aromatic alcohol or class of aromatic alcohol) into the mixture of the ether soaked in the ether. The speed of adding the ether should be able to maintain the ether boiling slightly until the mixture of the ether and the ether disappeared, and then the Grignard reagent was obtained. The reaction is an exhalation of heat. If the reaction is slow to start, a small particle of iodine-can be added to start it. Once the reaction begins, after the ether boils, the ether vapor is enough to eliminate the air in the system, but water is not allowed. Vinegar and the chorine bound to the ene carbon could not react with lithium in ether. If the ether was replaced by potassium ether, the reagent of lithium could be prepared. Grignard reagents could react with ketones. Under suitable reaction conditions, such as the Grignard reagent prepared by the researchers of Hokkaido University in Japan using ball mill technology, in the presence of a small amount of potassium furane (TH F) or cyclopentyl methylether (CPME), the prepared Grignard reagent reacted with an electrophile reagent such as a keto to construct a C-C bond to obtain the corresponding alcohol product. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The preparation method and ingredients of spicy hotpot
There were many methods and ingredients to make Mala Tang. We can see the different recipes and production steps. One of the common recipes included the preparation of base and soup. The raw materials of the base include butter, glutinous rice cake chili, Pi County bean paste, ginger, white wine, star anise, cassia, cloves, licorice roots, white cardamom, fennel, and so on. The raw materials of the soup include base, old oil, chicken essence, dried chili, pepper, white juice soup, fermented glutinous rice, and so on. In addition, meat dishes and vegetable dishes were also common ingredients for spicy hotpot. However, the specific production method and ingredient ratio were not explicitly mentioned in the search results provided. Therefore, we are unable to give an accurate method of making it and the ratio of ingredients.
The preparation method and ingredients of braised chicken
The cooking method and ingredients of the braised chicken could be obtained according to the search results provided. According to document [1], the method of making braised chicken included slaughtering the chicken, removing the feathers, washing it, breaking the thigh bone with a knife, inserting the legs and wings, bending the chicken head back, opening the chicken feet, and so on. The document [2] provided the steps of cooking braised chicken, including applying salt, boiling red rice, stir-frying sugar, stir-frying spices, and simmering. The document [3] mentioned the ingredients and preparation method of braised chicken, including steps such as boiling soup and soaking the chicken body. The recipe and cooking method of the home version of braised chicken wings were provided in document [5], including blanching, stir-frying spices, boiling, and other steps. Based on this information, the method of making braised chicken included slaughtering the chicken, removing the feathers, washing it, and then boiling it according to different recipes, stir-frying the spices, boiling it, and so on. The ingredients for braised chicken included chicken, spices (such as Cassia, star anise, ginger, pepper, etc.), seasonings (such as soy sauce, salt, sugar, etc.).
What is the preparation method of gardenia essence?
The preparation method of the gardenia essence is as follows: according to the weight percentage, leaf alcohol, leaf alcohol ester acetate, octyneic acid, methylethyljasmonone, rose ether, indoles, laurocarbolic acid and undecenal are diluted to the corresponding concentration by the use of the propan, and then the components are weighed and mixed according to the weight percentage of the raw materials to prepare the gardenia essence. Another method is to first put the hollow nano-silicon spheres into the essence and fragrance solution, and then stand for 2 - 5 hours to obtain the hollow nano-silicon spheres added with essence and fragrance for later use; then, the hollow nano-silicon spheres are wrapped by a coating layer, and after the coating is completed, the hollow nano-silicon spheres are dried at a low temperature to obtain the composite essence material (this method can be used to prepare the slow-release essence material containing gardenia essence). The novel "Smelling the Jasmine Fragrance Again" is equally exciting. Everyone is welcome to click and read it!
What is the reaction formula for the preparation of bio-alcohol?
The preparation of bio-alcohol was mainly through biological fermentation. The reaction formula for preparing alcohol from cane sugar was: C12H22O11 + H2O -> 4C2H50H +4CO2. In addition, in the process of using the biological material to produce the fermentation, the fermentation and the production of alcohol, the fermentation of the biological material was first carried out to prepare the fermentable sugar liquid, and then the fermentation of the yeast to produce alcohol was carried out. However, the specific reaction formula was not given. The microorganisms commonly used in biological fermentation were yeasts. In this process, the microorganisms converted sugar into alcohol. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the reaction type of the laboratory preparation equation for alkyls?
Alkane can be prepared by the reaction of an alkyls and metallic Na (Wurtz reaction), which is a type of free radical reaction. The reaction equation used the synthesis of diethylethyldimethoxysane from trimethylethyltrimethoxysane, bromic ether, and metallic Na as raw materials: 2CH3CH2Br2 + 2Na → CH3CH2-CH2CH3 + 2NaBr2. This reaction was a free radical reaction. In addition, alkyls were generally obtained from natural gas and oil. If pure alkyls were needed, they could also be synthesized. The substitution reaction of alkyls was a free radical substitution reaction (for example, the substitution reaction between alkyls and halos, the reaction conditions were light or high temperature), but this was not the main reaction type of alkyls. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the preparation method of the drug allergy test solution?
The following is the preparation method of common drug allergy test solutions: - ** Penicilin skin test solution preparation (800,000 units as an example)**: Inject 4ml of the isonotic salt solution, then each ml contains 200,000 units. Take 0.1ml and add 0.9ml of isonotic salinewater to 1ml. At this time, each ml contains 20,000 u. Then, 0.1ml of the solution was added with 0.9ml of the solution to make 1ml of the solution, each ml containing 2000u. Continue to take 0.1ml and add 0.9ml of isonotic salinewater to 1ml, each ml containing 200u. It is also possible to dissolve 1.6 million Penicillins in normal saline solution to 4ml (400,000 U/ml); take 0.1 ml of the upper fluid + normal saline solution to 1 ml (40,000 U/ml); take 0.1 ml of the upper fluid + normal saline solution to 1 ml (400U/ml); take 0.1 ml of the upper fluid + normal saline solution to 1ml (400U/ml); take 0.5 ml of the upper fluid + normal saline solution to 1ml (200U/ml). The standard solution for the skin test was a physiological salt solution containing 200 - 500 units of penicillins per 1ml, and the injection dosage was 0.1 ml (containing 20 - 50 units). - ** Cefazolin Na Skin Test Solution preparation (0.5g/vial)**: Add 5ml of Isotonic Saline to obtain a 0.1g/ml solution; Add 4.9ml of Isotonic Saline to 5ml of 0.1ml to obtain a 2g/ml solution; Add 4.85ml of Isotonic Saline to 5ml of 0.15g/vial to obtain a 60? g/ml solution. During the skin test, 0.1ml (containing 6 ug) was injected into the skin. - ** Principle of preparation of skin test solution for other cephem drugs (take every 0.5g of drug as an example)**: The concentration of skin test solution is 500ug per ml. - ** Cefazolin Na 0.5, Cefazoxime 0.5, Cefminox 0.5, Cefazolin Pentahydra 0.5, Cefotiramine 0.5, Cefpirome 0.5**: Dissolve in normal saline solution to 4ml (125 g/ml is 0.5 g/4ml). For the first time, 0.1ml of the fluid + normal saline solution was taken to 1ml (12.5g/ml); for the second time, 0.1ml of the fluid + normal saline solution was taken to 1ml (1.25g/ml); for the third time, 0.4ml of the fluid + normal saline solution was taken to 1ml (0.5g/ml, 500ug/ml); for the skin test, 0.1ml was taken (50ug/0.1ml). - ** Ceftezuo 1.0, Cefoperazone Sodium1.0, Cefathiamidine1.0, Cefoxitin 1.0, Cefotaime Sodium1.0, Cefmenoxime1.0, Ceftriaxone Sodium1.0, Cefmetazole1.0 **: Dissolve in normal saline to 8ml.(125g/ml, namely 0.5g/4ml); Take 0.1ml of the upper fluid + physiological salt solution to 1ml (12.5g/ml); Take 0.1ml of the upper fluid + physiological salt solution to 1ml (1.25g/ml); Take 0.4ml of the upper fluid + physiological salt solution to 1ml (0.5g/ml, namely 500ug/ml); Take 0.1ml (namely 50ug/0.1ml) during the skin test. - ** Ceftazidime 1.5, cefluroxim 1.5, Cefoperazone-sulbactan 1.5**: Dissolve in normal saline to 6ml (250g/ml, 0.5g/2ml); Take 0.1ml of the upper fluid + normal saline to 1ml (25g/ml); Take 0.1ml of the upper fluid + normal saline to 1ml (2.5g/ml); Take 0.2ml of the upper fluid + normal saline to 1ml (0.5g/ml, 500ug/ml); Take 0.1ml (50ug/0.1ml) for the skin test. - ** Cefoperazone 2.0**: Dissolve it in physiological salt solution to 8ml (250g/ml, namely 0.5g/2ml); take 0.1ml of the upper fluid + physiological salt solution to 1ml (25g/ml); take 0.1ml of the upper fluid + physiological salt solution to 1ml (2.5g/ml); take 0.2ml of the upper fluid + physiological salt solution to 1ml (0.5g/ml, namely 500ug/ml); take 0.1ml (namely 50ug/0.1ml) during the skin test. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>