Sodium benzoate acid preservatives, is commonly used in acidic condition, under acid condition can be converted into the activity of benzoic acid, so the corrosion mechanism of benzoic acid. Its antiseptic function best when pH 2.5 4.0. In alkaline medium, no sterilization and bacteriostasis. Because of water-soluble than benzoic acid, sodium benzoate in water interface system is more easily dissolved and dispersed, and stability in the air, so much more common than benzoic acid. Sodium benzoate lipophilicity is bigger, is easy to penetrate the cell membrane into the cells, interfere with the cell membrane permeability, inhibition of cell membrane to the absorption of amino acids; Into cells ionization acidification of alkali store inside the cell, and inhibit cell in the department of respiratory enzyme activity, prevent acetyl-coa condensation reaction, thereby the purpose of food antiseptic.
Sodium benzoate is a common food preservative, have prevent metamorphism, I extend the shelf life of effect. In beverages, canned, fruit juice, soy sauce, vinegar, and other areas of the food, cold food has a broad application and also can be used as a beverage preservatives. Sodium benzoate low toxicity. Toxicity and concerns in recent years has limited its application, the limits to its use.
Within the scope of the safety use of sodium benzoate has no effect on the body is, the excessive use of sodium benzoate can cause cancer, birth defects and death. Sodium benzoate belongs to low toxic substances, the time of poisoning symptoms and lavage dose there is a direct linear relationship, the greater the dose the higher mortality. Sodium benzoate this chemical, also good for people. We should try to reduce the consumption of contain preservative sodium benzoate do matter, usury risk-averse, correct treatment of sodium benzoate.
Hydrazine Hydrate is tasted colorless transparent oily liquid, with pale ammonia smell, smoke in the wet air, has a strong alkaline and hygroscopicity. Hydrazine under normal pressure and water can form the azeotropic (azeotrope hydrazine content about 69%). Industrial use general content is 40% - 80% of Hydrazine Hydrate or hydrazine salt solution. Liquid Hydrazine Hydrate exists in the form of dimer, miscibility with water and ethanol, insoluble in ether and chloroform; It can erode glass, rubber, leather, cork, etc., under the high temperature decomposition into N2, NH3 and H2; Strong reducibility, Hydrazine Hydrate and halogen, HNO3, intense reactions such as KMnO4, can absorb CO2 in the air, smoke. Hydrazine Hydrate and its derivatives products has been widely used in many industrial applications, used as a reducing agent, antioxidant, used in preparing medicine, foaming agent, etc.
Hydrazine Hydrate as reductant, medicine, pesticide, dye, foaming agent, imaging agent, antioxidant ingredients; A large number of used as deoxidizer of large boiler water; Also used in the manufacture of high purity metals, synthetic fiber, rare element separation. In addition, material used to make the rockets and explosives, etc. Also used as analytical reagent. Most of the hydrazine derivatives used as foaming agent is azobisformamide (AC), and toluene sulfonic acid hydrazine. More is used as medicine derivatives, the amount of hydrazine isoniazid, Finn sulfur ammonia urea and thiourea, benzene sulfonyl ammonia and antipsychotics 1 - different acyl - 2 - isopropyl hydrazine, anticancer drugs aldehyde hydrazine derivatives, anti-infection drugs 5 - nitrofuran methylene hydrazine derivatives, thiazole moiety via cephalosporin antibiotics, diuresis antihypertensive drug hydralazine methyl phenyl hydrazine, antitumor drug, etc. Used as pesticide hydrazine derivatives have a plant growth regulator maleic hydrazide derivatives, rodenticide two rat nitrobenzene hydrazine, insecticidal nail fungus pyrazole derivatives with 5 - nitrofuran ammonia thiourea, amino triazole herbicide, etc. In Japan, the purpose of the Hydrazine distribution of more than one third as boiler water deoxidation agent, foaming agent in the liver (including Hydrazine Hydrate and Hydrazine sulfate) accounted for about 30%, used to receive medicine accounted for 10%.
Benzyl benzoate is tasted for white crystal, ordinary goods under standard conditions is a transparent colorless or light yellow viscous liquid.
As a kind of excellent security environmental protection high temperature and solvent, Benzyl benzoate, because of its less volatile and have relative stability, thus become the only solvent, musk and widely used in pharmaceutical, spices.
Benzyl Benzoate with good can increase the plastic, can be used in the field of plasticizer.
Benzyl benzoate on the textile auxiliaries are mainly used for dye, leveling agent, supplements, etc. With the continuous development of textile industry, more and more high-grade fabric, fabric more high-grade fibre often more fine, its color, uniform when dyeing difficulty is relatively large. Benzyl Benzoate with good can increase plastic, easy to start fibers swelling is easy to dye into the fibers; And Benzyl Benzoate is a kind of excellent solvent, make dye is easy to dissolve and disperse evenly, levelness and dye migration performance is very good, so as to achieve the purpose of the dyeing uniformity.
Benzyl benzoate of market capacity is not large, the current global market capacity to 15000 tons, the annual growth rate only ~ 10%, so a strong company don't want to, even if the current L, touted as the world's largest company in the product sales is less than 6000 tons, sales of less than 90 million. And after years of price wars, including L company, producers are struggling in this breed. Even some scraps from the manufacturer of the benzyl acetate production line you have last year no longer production, resulting in domestic waste acid sales difficulties caused serious backlog. So the raw material purchasing is not a problem.
Everything has two sides, the weak market environment for technological innovation and has a large cost advantage of us, it become high expectations regardless due to weak us a perfect opportunity to enter the market.
Sodium Polyacrylate is a kind of new functional polymer materials and important chemical products, solid product is white or light yellow lump or powder, liquid product is colorless or light yellow viscous liquid. Dissolve in cold water, warm water, glycerin, propylene glycol, such as medium, changes in temperature is stable, has fixed the effect of metal ions, can stop to product the negative effect of metal ions, Sodium Polyacrylate is a has many special properties of the surfactants. Watersoluble linear polymers. Small relative molecular mass of liquid, big can be solid. Solid goods is white powder or granule, odourless tasteless, expansion, under the influence of water soluble in caustic soda solution. Strong moisture absorption. Sodium Polyacrylate with hydrophilic and hydrophobic groups of polymer compounds. Slowly dissolve in water to form very thick transparent liquid, about Pa s. 0.5% of its solution viscosity, viscosity is not absorbing water swelling, but due to the many anionic group in molecular ion phenomenon makes the molecular chain growth, apparent viscosity increases and form high viscosity solution. The viscosity is about 15 to 20 times the CMC, sodium alginate. Heat treatment, neutral salt, organic acids have little impact on its viscosity, viscosity increase alkaline. Not soluble in ethanol, acetone and other organic solvents. Along with the increase of relative molecular mass, Sodium Polyacrylate from colorless dilute solution to transparent elastic colloid and solid. Nature, use also has the obvious difference with different relative molecular mass.when used as a water quality stabilizer and black liquor concentration scale control agent. Molecular weight is above 10, the thickening agent and water retention agent is used as coating, can make the carboxylic styrene butadiene latex and synthetic latex such as acrylate emulsion viscosity growth, avoid water precipitation, maintain stability of the coating system. Molecular weight in more than 10, used as a flocculating agent, as well as in the food industry as reinforced adhesion agent, emulsifying dispersant, etc.
PVA is has the potential to produce one of super-high strength fiber flexible polymer chain, and according to the main chain of the PVA macromolecule bond energy theory, compared to the calculated value of a commodity PVA fiber highest intensity was only about 10% of the theoretical strength, high modulus of 30% of the theoretical limit value . Therefore, looking for methods to develop High strength & high modulus PVA fiber is feasible.
Fiber fracture microscopic mechanism, generally have a slip of molecular chain and two kinds of molecular chain fracture, its have in common is to assume that the molecular chain in fiber is arranged along the fiber axis parallel orientation, uniform distribution of stress in the fiber cross section. So, the strength of the fiber mainly depends on the fiber cross section on macromolecular chain number, the uniformity of chemical bonds can and chain extension. So High molecular weight, molecular chain highly extended orientation and crystallization in full, for producing High strength & high modulus PVA fiber's theory of three basic conditions.
High strength & high modulus PVA fiber can also be applied on the fiber glass replacement. Glass fiber has high strength and modulus, so the construction of lightweight materials generally USES glass fiber as reinforcing material, but because of its alkali resistance is not ideal, so bending strength along with the extending of time will be reduced. In addition, can stimulate the staff in the construction of the skin and environmental protection. High strength & high modulus PVA fiber has unique properties, can be a glass fiber in the building materials of the application of a better alternative materials.
High strength & high modulus PVA fiber reinforced material can also be used for rubber and tyre cord, still can use its High tensile and corrosion resistance and other properties, used in the production of fishing nets, rope, canvas, conveyor belt, etc.
Synthesis of hydrazine in 1875, has been 100 years of history. Since the end of world war ii, the germans will be used for rocket propellant, its industrial production has more than half a century of history. Hydrazine monohydrate usually in the form (N2H4.H2O), equivalent to 64% mass fraction of hydrazine. Industrial use general content is 40% - 80% of Hydrazine Hydrate or Hydrazine salt solution.
Hydrazine Hydrate and its derivatives products has been widely used in many industrial applications, such as chemical products, pharmaceutical products, agrochemical products, water treatment, photography, and photography, etc.
Hydrazine Hydrate directly used as:
1. Anti-corrosion additives used for circulating water in thermal power plant and nuclear power plant.
2. The water in industrial boiler and high pressure steam furnace deoxidizer.
Hydrazine Hydrate is a kind of efficient and reducing agent, can synthesize the following products:
1. The foaming agent azodicarbonamide (azo) carbon amide (such as: used in the production of inner tube with sodium azide products).
2. The scope of products and pharmaceutical products, the synthesis of biologically active intermediates to Mr Into three azole.
3. Azo initiator
4. Other kinds of products: certain organic pigments in dye products, photographic aspect of reagent, carbamate and acrylic products, as well as cyanide bromate products.
Hydrazine Hydrate can also be applied in the following areas:
1. Cleaning, refining of precious metal.
2. The acid lotion and recycling metal surface treatment liquid.
3. Processing waste liquid and waste gas.
4. Used in the electronic market all levels of refined sulfuric acid purification.
5. Plastic and metal (nickel, cobalt, iron, chromium, etc.) of the metal Mosaic.
6. Is the rocket fuel and the formulation of the product.
7. Use in ACTIRED process, this process is mainly used in gold ore dressing.
(a) steam pretest bubble
Steam Expanded Polystyrene pretest bubble pretest probability of main equipment for steam bubble machine, by fixed stir bar, screw barrel, mixer, feeder, transmission parts, blast air feeding pipe and the composition of frame.
Cylinder and agitator as main components, are made of stainless steel. A simplified with insulation layer, outside wall two side have two shut down hole (in the event of accident, can quickly release particles, so as not to heat too long and agglomerate). Had fixed on the stirring shaft side stick blender, easy to stir mutual bonding the pretest probability of particles. Near the bottom of the four fixed hollow stirring stick around, at regular intervals in accordance with the uniform diameter is about 1.0 mm holes, the lowest part of a pipe of compressed air, to regulate the temperature of the bottom, the other three through steam pipe, the heating steam thin hole directly into the cylinder, and helps to pretest bubble. Rotary agitator at the bottom of a stir bar near the floor, make the sink on the bottom of the bead is stirring from binding to each other. Continuous evenly feed using spiral feeder, in order to quantitatively feed. Discharging mouth and worm wheel mechanism, to lift up and down adjustment, control the pretest bubble particles stay in the barrel for a time, so as to achieve specified bulk density.
(2) the pretest probability of vacuum bubble
Expanded Polystyrene beads pretest probability of vacuum bubble, not only can shorten the production time, and as mentioned above, after the pretest bubble particle volume is small.
Vacuum pretest bubble machine is a kind of vacuum tubular mixing container, with ptfe Shanghai juji, outsourcing with steam heating jacket, equipped with processing conditions and control system of automatic cycle. The Expanded Polystyrene beads into the mixing container, mixing and pretest bubble; Then, vacuum pumping into 38 ~ 50 cm hg, make bead inside bubble pressure differences between the hole and the surrounding space, make the further advance of bubble; Then mix a certain amount of water into the container, and the water mutation of 71 "82. Low temperature steam and C under vacuum condition, make foam bead cooling, and makes the bubble hole surface without shrinkage during solidification. After eliminating the vacuum, pretest bubble of bead with air booster discharge.