32results about How to "Simple production process conditions" patented technology

The invention belongs to the field of applications of functional polymer materials and particularly relates to a preparation method of a phosphorous and nitrogen synergistic type water-soluble polymer flame retardant. According to the method, a phosphorous-containing intermediate is prepared from raw materials including neopentyl glycol and phosphorous oxychloride and then activated with potassium thiocyanate, the activated phosphorous-containing intermediate reacts with macromolecular nitrogen-containing intermediate polyethyleneimine, and the tawny powdery phosphorous and nitrogen synergistic type polymer flame retardant is obtained. The flame retardant is water-soluble and can be well compatible with a polymer material, the molecular weight is adjustable as required, and the flame retardance of the material can be improved. The flame retardant can effectively solve the problem that common phosphorous and nitrogen synergistic type flame retardants are insoluble in water, can be effectively dispersed when applied to preparation of water foam polyurethane materials and the like and cannot migrate and separate out of the materials and the problem of the poor mechanical performance of the materials is solved. The production technology condition is convenient, and the product is high in purity and convenient to use.

The invention discloses a method for preparing high-purity calcium sulfate dihydrate crystal whiskers by metallurgical flue gas desulfurization gypsum recrystallization method. The method comprises: metallurgical flue gas desulfurization gypsum pickling to remove a small amount of calcium carbonate or calcium oxide and soluble impurities; The acid solution of salt dissolves gypsum, which is used as the raw material for the preparation of high-purity calcium sulfate dihydrate whiskers; the addition of mediators controls the controllable growth of calcium sulfate whiskers, so as to form calcium sulfate whiskers with controllable aspect ratio and complete crystal morphology, Filter and dry to obtain calcium sulfate dihydrate whiskers. Under normal pressure and mild conditions, the invention utilizes the principle of recrystallization to realize resource utilization of high value-added calcium sulfate whiskers prepared from metallurgical flue gas desulfurization gypsum. The raw materials used in the invention are easy to obtain, the production process conditions are simple, the high-purity whiskers have high added value, and the produced calcium sulfate dihydrate whiskers have the characteristics of small diameter, high aspect ratio, complete and uniform appearance and stable performance, and can be used as reinforcing materials It is used as an additive in industries such as plastics, rubber, paper and ceramics, and has broad application prospects.

The invention discloses a phosphorus-containing dihydric alcohol and a preparation method thereof. The phosphorus-containing dihydric alcohol is a synthetic dihydric alcohol. The preparation method comprises the following steps that 1, n-butyraldehyde and a formaldehyde solution undergo a reaction under a certain condition to produce 2,2-dimethylolbutyraldehyde; and 2, DOPO and 2,2-dimethylolbutyraldehyde undergo a reaction under a certain condition; and the reaction products are subjected to pumping filtration, washing, recrystallization and drying to form the phosphorus-containing dihydric alcohol product. The phosphorus-containing dihydric alcohol can be used as a reactive flame retardant used in polymers such as epoxy resins, phenolic resins, plastic and rubber to improve the flame resistance of the polymers, and can also be used as a phosphorus-containing intermediate for preparation of other high-performance materials. The preparation method has the advantages of simple processes, high product purity, high yield and simple aftertreatment.

The invention relates to a bamboo-plastic composite pipe rolling forming technique, which solves a problem that present bamboo-plastic composite pipe centrifugal casting has the defects of easy offset and exposure, loose bamboo filling materials, low content, etc. The specific processing steps are to cut bamboo materials into bamboo long strips, on which degreasing, dehydration and surface active agent activation treatments are implemented. A mat bamboo weaved object are precast. Resin mortars are evenly coated on the mat bamboo weaved object. Silicon oil demould agent is coated on the outer surface of the mould pipe. More than one layer of the mat bamboo weaved object is helicoidally tensioned and winded on the mould pipe and is heated and solidified for forming. Then, the object is cooled to the room temperature and is demoulded to obtain the bamboo-plastic composite pipe. The manufacturing process condition requirements of the invention are relative simple. The compactness of the bamboo filling materials is greatly improved. The strength and the rigidity of the pipe are improved. And the content of the bamboo materials reaches to 50-70 percentage, which is beneficial to the further lowering of the cost. The invention is especially applied to the production of pipe products with large diameter.

Relating to a preparation method of spiro-compounds, the invention provides a phosphorus-containing spiro-compound and a preparation method thereof. The preparation method comprises the steps of: 1. reacting phosphorus-containing diol with di-n-butyltin oxide under certain conditions to generate an intermediate; 2. reacting the intermediate with carbon disulfide under certain conditions, carrying out pump filtration, washing, recrystallization and drying treatment, thus obtaining a phosphorus-containing spiro-compound product. The phosphorus-containing spiro-compound prepared in the invention can be used in epoxy resin, phenolic resin and other high polymer materials to improve the mechanical properties of polymer materials, and also can enhance the flame retardant property of the materials, thus being a multifunctional modification additive. The method adopted in the invention has the advantages of simple production process conditions, high product purity and yield, and easy aftertreatment process, etc.

The present invention provides a preparation method and application of Maryland tobacco leaves fermented extracts. After the Maryland tobacco leaves are crushed, Maryland tobacco rods are used to immobilize and adsorb microbial strains, and the Maryland tobacco powder is incubated, hydrolyzed and fermented, combined with continuous countercurrent ultrasonic Extraction and preparation of Maryland tobacco leaf extract, the extract has strong natural tobacco aroma, reduced irritation, simple purification and separation steps, mild process conditions, improved extraction rate and production efficiency; adding ingredients to traditional cigarettes and new heat-not-burn cigarettes For incense application, it has natural tobacco aroma, full of strength, strong sense of hair penetration, with fruity and milky sweet aroma, which is in harmony with cigarette smoke and has the same style.

The invention provides a burley tobacco extract applied to a heated-non-combustible cigarette and an application of the burley tobacco extract. With a composite biological material of burley tobacco stems and bagasse as an immobilized carrier, biological preparations, including a microbial aroma-producing strain and enzyme, are adsorbed; burley tobacco powder is incubated, hydrolyzed and fermented; and in combination with a continuous counter-current ultrasonic solvent extracting technology, the burley tobacco extract is prepared, and the burley tobacco extract can be combined with propylene glycol; intrinsic intense fragrance of natural tobacco is reserved; characteristic smell of burley tobacco is relieved and irritation is reduced; the burley tobacco has natural composite fragrance of fresh fruity aroma, smell of caramel, smell of being roasted and the like; the preparation method of gentle in process conditions, high in extracting rate and high in production efficiency; the burleytobacco extract is applied to a novel heated-non-combustible cigarette material; the burley tobacco extract is coordinate with cigarette fragrance and uniform in style, and the burley tobacco extractcan increase smoke concentration, enhance feeling of being satisfied and enrich cigarette aroma; and irritant smell of burley tobacco is obviously reduced, and taste is improved.

The invention discloses liquor-saturated gingko fruit leisure food and a production method thereof. The production method is characterized by comprising the following steps: soaking gingko nutlets into hot water at the temperature of 50 to 60 DEG C for 30 minutes; removing endopleura; performing debitterizing treatment; placing the gingko nutlets into a pressure cooker and cooking at the pressure of 1.5 kg / cm<2> for 10 minutes; shifting out; naturally cooling; mixing the gingko nutlets and liquor liquid at the weight ratio of 1:1; placing the mixture into a stainless steel tank, sealing and dipping at 18 to 20 DEG C for 35 days; turning over for one time every other 7 days during dipping; finally taking out the liquor-saturated gingko nutlets; draining the liquor liquid attached to the surfaces of the gingko nutlets; removing the residual liquor liquid from the surfaces of the liquor-saturated gingko nutlets by using high-quality white spirit with the concentration of 60 percent (VOL); draining the residual spirit; placing in a cool, dry and ventilate place and airing until the surfaces of the nutlets are completely dry; and packaging and sterilizing to prepare finished products. The liquor-saturated gingko fruit leisure food provided by the invention can further improve taste of the gingko nutlets, so that the finished products are sweet, soft, delicate, mellow, fragrant and sweet.