161 results about "Cycleanine dimethobromide" patented technology

The invention discloses an inorganic material hybrid hard melamine polyurethane foam heat insulation material, a preparation method thereof and combined polyether used therein. The combined polyether comprises: a polyol flame retardant, hydroxyl calcium phosphate, an inorganic material compounded with hydroxyl calcium phosphate, glycerin, N, N, N, N, N-pentamethyl diethylenetriamine, dimethyl cyclohexyl amine, 33+ / -1Wt.% triethylene diamine's dipropylene glycol solution, organic tin, hexahydro triazine, a foaming agent 141B, water, and silicone oil AK-158. The preparation method includes: mixing the combined polyether with isocyanate in ratio, and then carrying out spraying or casting foaming moulding, thus forming the heat insulation material. The heat insulation material has the characteristics of stable physical performance, no deformation, no shrinkage, strong bonding force, low thermal conductivity, an oxygen index up to over 30%, and a combustion heat release rate increase index of less than 250W / S.

The present invention discloses a method for preparing 3-aminomethyl-3,5,5-trimethyl cyclohexylamine(isophorone diamine, IPDA) from 3-cyan-3,5,5-trimethyl cyclohexanone(IPN). The method comprises the following steps 3-cyan-3,5,5-trimethyl cyclohexanone, ammonia, an alcohol and / or ether solvent, a hydrogenation catalyst and a promoter are reacted at a temperature of between 50 and 120 DEG C and a hydrogen pressure of between 5 and 15 MPa so as to obtain 3-aminomethyl-3,3,3-trimethyl cyclohexylamine. The method simplifies the prior process for preparing IPDA from IPN, is low in equipment cost, mild in reaction conditions and high in offspring yield.

The invention relates to an improved process for preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine, referred to hereinafter as isophoronediamine or, in abbreviated form, IPDA, by: I. preparation of isophorone by catalyzed aldol condensations with acetone as reactant; II. Reaction of isophorone with HCN to form isophoronenitrile (IPN, 3-cyano-3,5,5-trimethylcyclohexanone); III. catalytic hydrogenation and / or catalytic reductive amination (also referred to as aminative hydrogenation) of 3-cyano-3,5,5-trimethylcyclohexanone, hereinafter called isophoronenitrile or, in abbreviated form, IPN, to give the isophoronediamine.

The invention provides a continuous preparation method of 3-aminomethyl-3,5,5-trimethylcyclohexylamine. In the invention, a 3-cyan-3,5,5-trimethylcyclohexylimine charging flow reacts with NH3 and hydrogen in the presence of a hydrogenation catalyst. The method is characterized in that the method concretely comprises the following steps: adding an alkaline compound to the 3-cyan-3,5,5-trimethylcyclohexylimine charging flow, and adding an acidic compound to a reaction flow after partial 3-cyan-3,5,5-trimethylcyclohexylimine has been reacted in order to carry out a hydrogenation reaction to prepare the 3-aminomethyl-3,5,5-trimethylcyclohexylamine. The method has the advantages of low amino nitrile content in the product, effective reduction of the reaction stay time, and substantial reduction of the application amount of the catalyst in the hydrogenation reaction process.

The invention provides a method for preparing 3-aminomethyl-3,5,5-trimethyl cyclohexylamine. The method includes: a) reacting 3-cyano-3,5,5-trimethyl cyclohexanone with excess primary amine, while removing water of the reaction, so that IPN is substantially completely converted to an imine compound; b) in the presence of an aminolysis catalyst, mixing the resulting product from step a) with liquid ammonia so as to carry out the aminolysis reaction on the imine compound to form 3-cyano-3,5,5-trimethyl cyclohexylimine and the primary amine; and c) performing the hydrogenation reaction to 3-cyano-3,5,5-trimethyl cyclohexylimine obtained in step b) to get 3-carbamoylyl-3,5,5-trimethyl cyclohexylamine in the presence of hydrogen and a hydrogenation catalyst. The method of the present invention prevents the generation of major byproducts of 3,5,5-trimethyl cyclohexanol, and 3-aminomethyl-3,5,5-trimethyl cyclohexanol in the prior art, thereby improving the yield of 3-aminomethyl-3,5,5-trimethyl cyclohexylamine.

The invention discloses composite polyether, composition including the composite polyether and polyurethane block foam and a preparing method and application of the composite polyether. The composite polyether includes, by weight, 4 parts to 6 parts of polyether polyol A, 3 parts to 4 parts of polyether polyol B, 1 part to 2 parts of polyether polyol C, 02 part to 0.4 part of surface active agent, 0.2 part to 0.4 part of catalyst, 1 part to 2 parts of foaming agents and 0.2 part of water, wherein the surface active agent is B8545 and LK665, and the catalyst is N,N-dimethyl cyclohexylamine 1,3,5-3 (dimethylamino propyl)-hexahydro triazine and TMR-2. The density of the rigid polyurethane block foam prepared from the composite polyether is uniform, a heat conductivity coefficient is small, foam is exquisite, dimensional stability is high, compression strength is high, and mould opening production and fast demolding can be performed when the rigid polyurethane block foam is prepared.

The invention provides a preparation method and application of N, N-dimethyl-3, 3, 5-trimethyl cyclohexylamine. The method comprises enabling 3, 3, 5-trimethyl cyclohexylamine, formaldehyde and hydrogen to undergo an amination hydrogenation reaction under a fixed temperature and pressure under the effect of a catalyst so as to prepare N, N-dimethyl-3, 3, 5-trimethyl cyclohexylamine. The obtained N, N-dimethyl-3, 3, 5-trimethyl cyclohexylamine can be used as a catalyst for polyurethane foaming after purification.

The invention relates to a composite vinylamine-series weakly-basic anion exchange resin and a method for recovering rhenium from waste acid produced in copper smelting, belonging to the technical field of recycling of metallic rhenium. The composite vinylamine-series weakly-basic anion exchange resin is prepared by swelling chloromethylated polystyrene microspheres in an organic solvent for 4 to 10 h; then slowly adding a mixture of dicyclohexylamine, pyridine and N-methylcyclohexylamine and carrying out a reaction at room temperature for 1 to 6 h; then carrying out heating to 40 to 90 DEG C and continuing the reaction for 6 to 18 h; and then carrying out vacuum pumping filtration. The composite vinylamine-series weakly-basic anion exchange resin provided by the invention has good adsorptive selectivity on low-concentration rhenium (2 to 10 mg / L) under the conditions of high acidity and existence of high-concentration impurity ions, and almost does not adsorb impurity ions, especially toxic arsenate ions; waste acid directly enters an arsenate after filtering; so process flow is simplified and the recovery rate of rhenium is increased.

The invention provides a preparation method of a rigid polyurethane foam heat insulation and energy saving material. The preparation method comprises the following steps of S1, preparing a black material and a white material with the weight ratio being (1.1-1.2) to 1, wherein the black material is isocyanate, and the white material is prepared by mixing the following raw materials in parts by weight: 70-95 parts of polyether polyol, 15-25 parts of deionized water, 6-9 parts of expanded vermiculite, 3-6 parts of acrylic resin, 2-3 parts of organosilicon oil foam stabilizer, 3-6 parts of rock wool fiber, 2-6 parts of bagasse fiber, 5-9 parts of nanometer calcium carbonate, 0.1-0.3 part of N,N-dimethyl cyclohexyl amine and 4-6 parts of modified tin catalyst; and S2, uniformly mixing the whitematerial in advance, then mixing the black material and the white material, foaming a mixture with a high-pressure foaming machine, injecting a foamed product into a die, and performing formation toobtain the rigid polyurethane foam heat insulation and energy saving material. The preparation method can reduce use of a chemical solvent and improves the heat insulation performance of a whole polyurethane material at the same time.

The invention discloses a chemical synthesis method, in particular a synthesis method for continuously producing N,N-dimethyl cyclohexyl amine, taking cyclohexanol and dimethylamine as raw materials and carrying out closed loop circulation in the whole process. In the chemical synthesis method, the reaction is performed by taking Co / Al2O3 as a catalyst, and controlling the pressure, the temperature, the mol ratio of the cyclohexanol to the dimethylamine and the consumption of the catalyst to 0.01-3.5m3 / (hr*m3 catalyst); condensing and the cooling, gas-liquid separation and gas phrase recycling are carried out on the reacted materials; and liquid phrase enters a rectification tower for separating and purifying the N, N-dimethyl cyclohexyl amine to obtain the finished product. The synthetic method has the advantages of simple flow, easy operation, high conversion rate of raw materials, good selectivity of products, few byproducts, simple separation flow, low consumption of the raw materials, obvious environment-friendly effect, low production cost of the products and convenience for industrial large-scale production.

The invention relates to a production method of bromhexine hydrochloride. The production method is characterized by comprising the following steps of: 1) carrying out a condensation reaction between 3,5-dibromo-2-aminobenzalcohol and N-methyl cyclohexane in the presence of glacial acetic acid as a catalyst, thereby generating N-methyl-N-cyclohexyl-2-amino-3,5-dibromobenzylamine; 2) salifying the generated N-methyl-N-cyclohexyl-2-amino-3,5-dibromobenzylamine with hydrochloric acid to obtain bromhexine hydrochloride; and 3) decoloring and refining the obtained bromhexine hydrochloride in an alcoholic solution to obtain a pure product, wherein an azeotropic water-carrying agent is added to the condensation reaction in the step 1), and water in the reaction mixed solution in the reaction process is removed immediately through distillation.

The invention relates to a hydroquinone hydrogenation catalyst, a preparation method and a hydrogenation reaction method. The catalyst contains an active ingredient of Ru, an auxiliary agent La and a carrier, wherein the composition of the catalyst is shown as x percent Ru-y percent La / carrier, wherein the x percent Ru-y percent La / carrier, wherein the x percent represents the mass percentage of the Ru in the catalyst; the y percent represents the mass percentage of the La in the catalyst; the content of each ingredient of the catalyst is shown as follows: the mass percentage of Ru is 0.5 to 5 percent; the mass percentage of La is 0.2 to 2 percent; the rest is the carrier. Catalyst precursors are prepared by an immersion-precipitation method; then, the catalyst precursors are reduced in the hydrogen-containing atmosphere; the para-nitrotoluene hydrogenation Ru-La bimetal catalyst is obtained; in the reaction for preparing p-methyl-cyclohexylamine through nitrotoluene hydrogenation, the p-methyl-cyclohexylamine can be strongly adsorbed onto the catalyst; a great amount of tar can be further generated; the proceeding of the reaction is inhibited; through the addition of the La, the problem of strong adsorption of the catalyst on the p-methyl-cyclohexylamine is well solved; the tar generation quantity is reduced.

A molecular sieve comprises at least one intergrown phase of an AFX framework-type molecular sieve and a CHA framework-type molecular sieve and is conveniently synthesized using a combination of N,N,N′N′-tetramethylhexane-1,6-diamine and N,N-dimethylcyclohexylamine as organic directing agents.