44 results about "Sec-Butylamine" patented technology

The process of synthesizing secondary butylamine includes the reduction reaction of butanone oxime and hydrogen under the action of ammonia at pressure of 1-6 MPa and temperature of 20-150 deg.c in the presence of Raney Ni catalyst; and the dewatering and rectification of the reaction product. The Raney Ni catalyst amount is 0.28-10 wt% of butanone oxime, and the weight ratio between ammonia and butanone oxime is 0-2 to 1. The secondary butylamine synthesizing process has low cost and high yield.

The invention relates to a catalyst for preparing secondary bulylamine by making methyl ethyl ketone undergo the process of catalytic ammoniation and hydrogenation and its preparation method. Said catalyst carrier is Al2O3-TiO2 composite oxide, its active component is formed from 10-25 wt% of NiO and 1-10 wt% of two kinds of CuO, Cr2O3, MgO and BaO. Said catalyst is prepared by adopting impregnation method. Said catalyst uses industrial methyl ethyl ketone, liquid ammonia and hydrogen gas as raw material, the mole ratio of methyl ethyl ketone, liquid ammonia and hydrogen gas is 1:1.2:1.2, under the condition of normal pressure and reaction temperature with 170-200deg.C the methyl ethyl ketone conversion rate can be up to 30-42% and the selectivity can be up to 70-97%.

The invention discloses a method for removing hyocholic acid from chenodeoxycholic acid. The method comprises the steps of dissolving, residue removing, complexing, crystallizing, centrifugal separating, emulsifying, acidifying, drying, mother liquor treating and the like; high-boiling-point butyl acetate is utilized as solvent, volatilization of the solvent is reduced, a good separation effect is achieved by utilizing the unique dissolution property of butyl acetate to impurities, and the solvent belongs to a three-level low-toxicity dangerous chemical; the selective complexing characteristic of sec-butylamine to bile acid is utilized, and the hyocholic acid and other impurities can be separated to a higher degree. According to the separation and purification method, impurity removing is qualified in one time, the loss rate of the chenodeoxycholic acid is 5% or below and is greatly lower than the effective ingredient loss of 30% in a conventional crystallization method, the solvent can be recycled, three wastes are not generated, and the method is an environment-friendly, low-cost and efficient separation method.

The invention provides a sucker controlling agent emulsifiable concentrate of potato, and relates to a sucker controlling agent of potato. The present sucker controlling agent of potato is sprout inhibitor DEECO with high price mainly produced by United Phosphorus Limited. The invention provides the sucker controlling agent emulsifiable concentrate of potato, and the formula thereof by weight proportion is that: 20-50 portions of chlorpropham, 20-50 portions of oleic acid, 8-34 portions of palmitic acid, 5-30 portions of stearic acid, 6-25 portions of tween, 4-30 portions of span, 2-22 portions of ethanol, 2-36 portions of acetone, 6-30 portions of sec-butylamine and 4-25 portions of thiabendazole(TBZ). The invention is characterized by simple production, low cost and good sprouting inhibition effect.

The invention discloses a method for continuously separating sec-butylamine, comprising the following steps: separating a mixture containing sec-butyl alcohol, sec-butylamine, water and di-sec-butylamine in a sec-butylamine separating tower, collecting the sec-butylamine product from the top of the tower, separating oil and water in a mixture containing the water, the sec-butyl alcohol and the di-sec-butylamine in a phase separator from a tower bottom, and then separating an upper oil phase in the middle part of an azeotrope tower, collecting the sec-butyl alcohol and a little sec-butylamine from the top of the tower, returning to a synthetic reaction system for recycle, after separating the mixture containing the water and the di-sec-butylamine in the middle of the di-sec-butylamine tower, collecting the water from the top of the tower to be discharged in standard, collecting the qualified di-sec-butylamine products from the tower bottom; getting the lower water phase of the phase separator into the middle of a recycling tower, through separating, collecting a little sec-butyl alcohol from the top of the tower to return to the synthetic reaction system for recycle, and discharging the water from the bottom of the tower in standard. The invention has advantages that the process of separating the sec-butylamine is simple, the consumption of the energy and raw materials is low and the production cost is low.

The modified polycarbodiimide compound of the present invention is obtained by modifying a polycarbodiimide compound derived from a diisocyanate compound with at least one aliphatic amine selected from the group consisting of diethylamine, methylisopropylamine, tert-butylethylamine, di-sec-butylamine, dicyclohexylamine, 2-methylpiperidine and 2,6-dimethylpiperidine. The curing agent of the present invention comprises the modified polycarbodiimide compound of the present invention. The thermosetting resin composition of the present invention comprises a carboxyl group-containing resin having a carboxyl group in a molecule or an epoxy resin having two or more epoxy groups in one molecule, and the curing agent of the present invention. Thus, a modified polycarbodiimide compound that can allow a resin composition to be cured at a relatively low temperature and that can suppress curing of a resin composition in a drying step before a thermal curing step of a resin composition, a curing agent comprising the modified polycarbodiimide compound, and a thermosetting resin composition comprising the curing agent can be provided.