195 results about "Toluenediamine" patented technology

Disclosed is a polyimide film prepared from an aromatic tetracarboxylic acid component consisting essentially of 3,3′,4,4′-biphenyltetracarboxylic dianhydride and an aromatic diamine component consisting essentially of not less than 65 mol phenylenediamine % but less than 97 mol % of p-phenylenediamine and not less than 3 mol % but less than 35 mol % of 2,4-toluenediamine.

Toluenediamine is produced and separated from by-products of the reaction by: a) hydrogenating dinitrotoluene in the presence of a catalyst, b) separating the catalyst, water and optionally solvent from the hydrogenation reaction mixture to give crude toluenediamine, and

c) separating by distillation the crude toluenediamine in a separating wall column into at least four product streams P1, P2, P3 and P4. The product stream P1 is a stream containing low boilers. The product stream P2 is a stream containing o-toluenediamine. The product stream P3 is a stream containing m-toluenediamine. The product stream P4 is a stream containing high boilers and m-toluenediamine.

Semi-rigid polyurethane foams having a density of 90 to 180 kg/m³ and a compressive strength of 20 to 95 kPa are produced by reacting a polyisocyanate with an isocyanate-reactive component that includes an o-toluenediamine initiated polyether polyol. These foams are particularly useful as composites for automotive interior components.

A golf ball with a cover composed of a thermosetting polyurethane that has increased resistance to yellowing is disclosed herein. The golf ball of the present invention is able to accomplish this by providing a cover composed of a thermosetting polyurethane material formed from a polyurethane prepolymer and a curative composed of 20 to 40 parts 4,4′-methylenebis-(3-chloro,2,6-diethyl)-aniline and 80 to 60 parts diethyl 2,4-toluenediamine. The cover is preferably formed over a core and boundary layer.

The present invention relates to zeolitic adsorbents based on small agglomerated crystals of zeolite X comprising barium, combining optimum properties in terms of selectivity and of mechanical strength.

These adsorbents have applications in the separation of fractions of aromatic C₈ isomers and in particular xylenes, in the separation of substituted toluene isomers, such as nitrotoluene, diethyltoluene or toluenediamine, in the separation of cresols and in the separation of polyhydric alcohols, such as sugars.

The invention relates to a hard polyurethane foam composite which comprises the following components: (a) a polyhydric alcohol composite comprising a polyether polyol polymerized from sucrose and oxidized olefin, a polyether polyol polymerized from sorbitol, glycerinum and oxidized olefin, an amine polyether polyol polymerized from toluenediamine and the oxidized olefin, a polyether polyol polymerized from glycerinum and the oxidized olefin, and a polyether polyol polymerized from MDA (methylene diphenylamine) and the oxidized olefin; (b) a foam stabilizer; (c) a composite catalyst comprising a foaming catalyst, a gel catalyst and a polymerization catalyst at the weight ratio of (0-4):(0.2-10):1; (d) a foaming agent; (e) water; and (f) an organic isocyanate. The invention further relates to a hard polyurethane foam preparation method and a thermal insulation component comprising the hard polyurethane foam.

The invention discloses a method for continuously manufacturing toluene di-dsocyanate, comprising the following steps: (1) premixing a toluenediamine inert solvent solution with a phosgene inert solvent solution containing a hydrogen chloride with a mass fraction lower than 0.1 percent by a premixer and generating reaction; (2) importing the reacted mixture into a high shear reactor and refillingthe phosgene inert solvent solution containing the hydrogen chloride with the mass fraction lower than 0.5 percent to continue mixing and generating reaction; (3) leading materials in an outlet of thehigh shear reactor into detention equipment, continuing reacting at a temperature of 90-200 DEG C and an absolute pressure of 0.3-1.8 MPa until the solution turns transparent and a crude toluene di-isocyanatel is generated. The method for continuously manufacturing toluene di-dsocyanate is realized by mixing the phosgene with hydrogen chlorides in different contents with the toluenediamine step by step, thereby reducing the generation amount of low amine hydrochloride, improving the yield of the product toluene di-isocyanate and avoiding the addition of the energy consumption in refining phosgene recovering.

The invention belongs to the technical field of toluene diisocyanate production and discloses a device and technology for continuous preparation of toluene diisocyanate. The device and technology solves the problem that the existing toluene diisocyanate production technology has large difference of a material volume flow ratio, poor reaction selectivity, a low conversion rate and can cause reaction device fault. The device comprises a cold reactor and a heat reactor. The cold reactor comprises an unlimited impinging stream structure and a hypergravity structure. The unlimited impinging stream structure comprises a main material feeding pipe and a sleeve pipe, and the pipes have different diameters. The technology comprises that a phosgene inert solvent and a toluenediamine inert solvent solution are oppositely collided by the unlimited impinging stream structure so that macroscopic mixing and preliminary microscopic mixing are fast finished, and the mixture is fed into a rotating filler, stays for some time, then is fed into the heat reactor and undergoes a reaction to produce a toluene diisocyanate TDI crude product. The device and technology realize basically complete toluene diisocyanate reaction, prevent urea substance generation, effectively prevent pipe and reactor blocking and improve toluene diisocyanate production efficiency.

The invention belongs to the technical field of toluene diisocyanate production and discloses an III-shaped hypergravity device and technology for continuous preparation of toluene diisocyanate. The device and technology solves the problem that the existing toluene diisocyanate production technology has poor reaction selectivity and a low conversion rate because of large difference of a material volume flow ratio thereby causing reaction device fault. The hypergravity device comprises a cold reactor and a heat reactor. The cold reactor comprises an unlimited impinging stream structure and a hypergravity structure. The unlimited impinging stream structure comprises a main material feeding pipe, an auxiliary material feeding pipe I and an auxiliary material feeding pipe II. The technology comprises that a phosgene inert solution and a toluenediamine inert solution are collided by the unlimited impinging stream structure, and the mixture is fed into a rotating filler, then is fed into the heat reactor and undergoes a reaction to produce a toluene diisocyanate TDI crude product. The device and technology realize basically complete toluene diisocyanate reaction, prevent urea substance generation, effectively prevent pipe and reactor blocking and improve toluene diisocyanate production efficiency.

the invention discloses a low-density low-conductive polyurethane rigid foam, which comprises the following parts: (a) 30-60 wt% polyether, which adopts sucrose as initiator to addition with oxidized olefin; 10-30wt% polyether, which adopts toluenediamine as initiator to addition with oxidized olefin; 20-50wt% polyether, which adopts pentaerythrite and methylglucoside as initiator to addition with oxidized olefin; 5-20wt% polyether, which adopts glycerin as initiator to addition with oxidized olefin; (b) 1.5-3.5 wt% compound catalyst; (c) 7-17wt% foamer; (d) 1.5-2.8wt% water; (e) 1.4-4.0wt% foam stabilizer; (f) polyisocyanates, which adopts compound as datum polyether and water with index at 0.95- 1.50.

The present invention provides a method for producing a rigid polyurethane slab foam having low heat conductivity and excellent incombustibility without generating scorch inside.(A) A modified polyisocyanate having NCO content of 25-28% which is obtained by modifying at least a part of polymeric diphenylmethane diisocyanate (MDI) containing MDI in a ratio of 30-80 mass% using a modifier comprising a polyether polyol with 2-4 functional groups and a hydroxy value of 100-900 mgKOH/g, (B) a polyol component containing a polyether polyol (B1) in a ratio of 50 mass% or more which is obtained by adding ethylene oxide and/or propylene oxide to toluenediamine, and (C) a foam forming composition containing a foaming agent comprising water are reacted.

A novel composition useful for golf ball covers that comprises a blend of a dilsocyanate/polyol polyurethane prepolymer with a curing agent comprising a blend of slow-reacting diamine with a fast-reacting diamine such as dimethylthio 2,4-toluenediamine and diethyl 2,4-toluenediamine, respectively. A golf ball cover made with this composition exhibits the characteristic feel and playability of a balata cover with superior durability characteristics (cut and shear resistance) which exceed those of a balata or ionomer cover.

The invention relates to a hard polyurethane composition with low thermal conductivity and rapid demoulding property. The composition comprises: 1) 100 parts of composite polyethers composed of 40-70 parts of polyethers with cane sugar as a starting agent, 10-50 parts of polyethers with ortho toluenediamine as a starting agent, 3-20 parts of polyethers with glycerin as a starting agent, and 3-20 parts of composite polyethers with a composite starting agent composed of cane sugar and glycerin; 2) 1.0-3.0 parts of a composite catalyst; 3) 10-20 parts of a foaming agent cyclopentane; 4) 1.5-3.0 parts of water; 5) 1.0-3.5 parts of a foam stabilizer; and 6) 130-150 parts of isocyanate with an index of 100-130. The hard polyurethane composition of the invention has demoulding time short to 170 seconds, low thermal conductivity and excellent thermal insulation performance, and can meet the demands for energy saving, environmental protection and production efficiency improvement when used in refrigerator production.

The invention relates to a polyalcohol composition containing the following components in parts by weight: 5-45 parts of polyether polyol (a1) formed by toluenediamine and oxyalkylene polymerization, 7-50 parts of polyether polyol (a2) formed by toluenediamine, triethanolamine and oxyalkylene polymerization, 3-25 parts of polyether polyol (a3) formed by glycerin and oxyalkylene polymerization, 15-65 parts of polyether polyol (a4) formed by saccharose and oxyalkylene polymerization and 3-20 parts of polyether polyol (a5), wherein the total weight part of the components from (a1) to (a5) is 100. The invention also relates to an application of the polyalcohol composition to the preparation of rigid polyurethane foam and rigid polyurethane foam prepared from the polyalcohol composition.

A process for synthesis of toluenediamine (TDA) by low pressure hydrogenation of dinitrotoluene (DNT) is as follows: preparing a fresh Raney nickel catalyst and DNT into fresh catalyst slurry, adding the fresh catalyst slurry into a hydrogenation reactor; respectively adding raw material DNT and hydrogen into the hydrogenation reactor for reaction, leading a liquid reaction product into a catalyst separator I for separation, sending an upper clear liquid to a catalyst separator II, sending a gas phase into a purge gas separator, and returning settled catalyst slurry to the hydrogenation reactor; and filtering a clear liquid in the central part of the catalyst separator II with a filter to obtain a crude TDA product. The process has the advantages of low equipment investment, low energy consumption, and synthesis of the toluenediamine (TDA) by hydrogenation of the dinitrotoluene in the absence of an externally added solvent and under the low pressure condition of 1MPa.

The invention relates to method for continuously purifying and refining ortho toludiamine. The method comprises the steps of: carrying out rectification by two towers connected in series, removing a front fraction of an ortho toludiamine crude product through a light component removing tower, and rectifying and separating out ortho toludiamine and meta-toluenediamine through a product tower. The method has the advantages that rectification is carried out by the two towers connected in series; and the ortho toludiamine, the meta-toluenediamine, monamine and other impurities can be continuously separated, and the purity of the ortho toludiamine can be up to over 99.5%.

The invention relates to a polyurea elastic body architectural engineering water-proofing material, which is constituted of component A and component B of equal weight ratio. The component A is isocyanate, component B includes raw materials (by weight ratio of component B) of: amido end-sealing epoxy alkane compound of 55-70%, diethyl toluenediamine of 8-10%, 3,3'-diethyl-4,4'-diaminodiphenylmethane of 3-5%, phosphite triester of 5-7%, dihexandiol ester of 3-5%, N,N'-dialkyldiamine of 5-8%, N,N'-dialkylmethanediamine of 2-4%, and titanium dioxide of 4-6%. Advantages of the invention are: high strength, plant puncture resistant, aging resistant, energy-saving, environmental protection, long using lifetime of more than 30 years, and changeable colors.

The invention discloses a supported catalyst for producing diethyltoluene diamine. The supported catalyst for producing diethyltoluene diamine comprises a modified carrier and a supported active component, wherein the modified carrier contains SiO2 and B2O3 obtained by decomposing a soluble silicon-containing compound and a boron-containing compound through drying and roasting after introducing the soluble silicon-containing compound and the boron-containing compound into the carrier. The invention further discloses a preparation method and application of the catalyst. The catalyst disclosed by the invention is suitable for the alkylation of aromatic amines, especially has extremely high activity and selectivity for continuous production of diethyltoluene diamine with toluenediamine alkylation. The catalyst has a simple preparation process, high economy and better application prospects.

The invention relates to a method for recovering toluenediamine (TDA) from waste slag emitted from production of toluene diisocyanate (TDI). The method comprises the steps: with triethylenetetramine as a reaction medium, performing catalysis hydrolysis on crushed TDI residue at a normal pressure by using a strong base, and completing the reaction within 3 hours; and salting out a hydrolysis product by using a saturated sodium chloride solution after filtering, extracting by using dichloromethane, and finally performing reduced pressure distillation on an extract to obtain the TDA, wherein the yield is capable of reaching above 75 percent and the purity is capable of reaching above 95 percent. According to the method, a high-pressure reactor and distillation or fractionation equipment with high cost are not needed, the reaction time consumption is short, the product yield is high, and the large-scale production of preparing the TDA through recovering of the residue of the TDI is favorably promoted.

The recovery of toluene diamine from tar waste residues discharged from the synthesis process of toluene diisocyanate comprising steps of: a) grinding the tar waste residues into particles; b) dispersing the particles of tar waste residues into a phase transfer catalyst, alkali and water to obtain a slurry, said phase transfer catalyst being selected from the group consisting of higher alcohols, polyols, polyether compounds and combinations thereof having a boiling point ranging from 120 to 280° C.; c) under the protection of a protective gas, subjecting the slurry to a hydrolysis reaction at a temperature of 120-180° C. under a meter-measured pressure of 0-0.95 MPa to produce toluene diamine; and d) recovering toluene diamine from the hydrolysis reaction solution. The present invention achieves highly efficient recovery of toluene diamine (the recovery rate of TDA is up to 60%) under mild conditions such as 120-180° C. and 0-0.95 MPa (meter-measured pressure), and has a significant economic benefit and friendliness to the environment by recycling the phase transfer catalyst (its recovery rate is up to 99.6%) and water.

The invention aims to provide a diethyltoluenediamine production device with an accurate material proportioning function, and relates to the field of diethyltoluenediamine production devices.The diethyltoluenediamine production device comprises a first supporting frame, a mixing cabin is fixedly connected to the first supporting frame, a quantitative proportioning mechanism is arranged on the first supporting frame, the quantitative proportioning mechanism communicates with the mixing cabin, and the mixing cabin communicates with the quantitative proportioning mechanism; a stirring mechanism is arranged in the mixing cabin, and an inner wall cleaning mechanism is arranged in the mixing cabin. The quantitative proportioning mechanism is arranged, so that the influence of the bottom pressure of the material box on feeding is avoided, and meanwhile, the situation that the production quality of a diethyl toluenediamine product is reduced due to inaccurate proportioning of two liquid materials caused by different feeding amounts of the two liquid materials is avoided; the stirring mechanism is arranged, so that the stirring time of two liquid materials is shortened, and the production efficiency of diethyltoluenediamine is improved; the inner wall cleaning mechanism is arranged, so that the influence of impurities on the inner wall of the mixing cabin on the next preparation of the diethyltoluenediamine is avoided, and the quality of the diethyltoluenediamine is improved.

The invention relates to a process for the production of toluene diisocyanate, in which the crude toluenediamine obtained from the hydrogenation is purified and then phosgenated. The purification step reduces the total amount of cyclic ketones to less than 0.1% by weight, based on 100% by weight of the toluenediamine.

The invention relates to a process for preparing toluene diisocyanate (TDI) by using toluenediamine and dimethyl carbonate. According to the process, a deactivation catalyst, namely zinc oxide (ZnO), of a reaction, which is used for synthesizing toluene dicarbamate (TDC) through catalyzing toluenediamine and dimethyl carbonate by zinc acetate, is used as a catalyst of a reaction for TDC decomposed TDI preparation, the deactivation catalyst, namely ZnO, of the reaction is not required to be separated from the product TDC and is directly applied to the reaction for TDC decomposition catalyzed TDI preparation, and a TDC decomposed TDI preparation process adopts that decomposition reactors of two stages are in series connection and a fractional condenser is arranged between the decomposition reactors of two stages. According to the process, TDC is synthesized through catalyzing toluenediamine and dimethyl carbonate by zinc acetate, and the deactivation catalyst, namely ZnO, of TDC synthesis is selected as an efficient catalyst for TDC decomposition reaction, so that the catalysis effect is good, and the yield of TDI is high; and the temperature of the TDC decomposition reaction is low, so that the total production cost can be greatly reduced.