TH14762B - Caprolactam preparation - Google Patents

Abstract

Caprolactam was prepared by heating the 6-amino- capronitrile in a transgenic catalyst and water under pressure over the atmosphere. by means in which (a) heats 6-aminocapronitrile or a mixture containing 6-aminocapronitrile and water and alcohol having a low boiling point or boiling point. High is an important component in the presence of hereditary catalysts in the reactor. To obtain mixture I (b) the mixture was distilled. At that time, to obtain the upper distillate, carpro-lactam and lower product, if ammonium was also present in section I, ammonia was removed. before distillation and thereafter (C1) the upper distillate is fed into reactor A of the primary; (a) the upper distillate is mixed with alcohol or water or 6-aminocathronitrile used in step (a), if desired, prior to being fed into reactor A or (C2), the upper distillate was fed with the lower product from step (b); The upper distillate section with alcohol or water or 6-aminocapyritrile can be used in step (a), if desired, prior to being fed into reactor B and carpo is obtained. The current lactam is similar to step (b) by distillation and not (d1) feeds the lower product from step (b) into reactor A of step (a) or (d2). Add water if desired and alcohol with a low boiling point or boiling point. can be high if desired, into the lower product and heat the latter substance at that time, Similar to step (a) in reactor C, the addition of the resulting mixture is obtained. reaction already From this section the catrolactam was obtained by distillation (d3). Water was added to the then-heated lower product in reactor D without the addition of a catalyst to obtain the resulting mixture. reaction already Caprolactam was obtained from the reaction mixture by distillation, then (d4) was heated to the lower product where water and base were added. in reactor E to obtain the reacted mixture. From this section, catrolactam is obtained by distillation.

Claims (1)

1.Process for the preparation of caprolactam by heating 6- aminocaponai Trile where there is a genetic catalyst (heterogeneous catalyst) and water under the North Atmosphere in which (a) heats 6- aminocanthonitrile Or a mixture that has 6-Aminocanthonitrile and water and alcohol with low boiling or high boiling points are important factors in the presence of catalysts. Combination reactions were also present in reactor a to obtain mix I (b), after which the mix I was distilled to obtain the upper distillation, caprolactam and the product. If ammonia is present in mix I, ammonia is removed before distillation and after (c1) the upper distillation is fed to reactor A of step (a). On with alcohol or water, or 6-amino capronitrile used in step (a), if desired, prior to feeding. Into reactor (A) or (c2) if desired, upper distillation with downstream products may be fed from step (b) into reactor B by, if desired, the upper distillate with alcohol may be mixed. Or water or 6- aminocapro The nitrile is used in step (a) before being fed into reactor B and then a caprolamtham. By distillation at the same stage as the procedure (b) and possibly (d1), the lower product is fed from step (b) into the reactor A of the procedure (a) or (d2) adding water if desired. Alcohol which has a low boiling point or high boiling point if desired into the production. The lower container and thereafter are heated to the latter in the same manner as the procedure (a) in the additional C reactor to obtain the reactive mixtures. By Condensation or (d3) water is added to the lower product which is then heated in reactor D without the addition of a catalyst to obtain the reactive mixtures and a caprolactact is obtained. m From such reactive mixtures by distillation or (d4) heating the lower product, which has been added with water and base, in reactor E to obtain the reaction mixture. From this section, a caprolactam is obtained by distillation. Slider at the preset orientation on the mounting positioner. A class B thermosetting adhesive sheet is inserted in the pre-defined area and between the sliders. Magnet and slider support assembly Temporarily attaching the magnetic head slide to the slider support assembly by making Such a predetermined area Local to complain the thermosetting glue scheme at an extent. Of course, by means of the heating tool stopped for a short period of time, heat should be given. In the local area, by means of short-term stopping of the heating apparatus, it is treated by Touching the heated body of the tool to the surface of the slider, the magnetic head or the slider support assembly in the pre-determined and precise area of the heated body tip. Temporary mounting magnet head and slide-out support assembly From the measuring instrument, positioning; And to attach the full magnetic head slider to the slider support assembly by further curing the thermosetting adhesive sheet 6. The method holds the right to claim 5, where the specific heating Correct This is done by detecting the actual temperature of the heating tip and by using power. Electricity to the end of the heating body for induction to regulate the temperature feedback of The tip that is heated. 7. As a way to claim claim 5 or 6, where thermosetting adhesive sheets are epoxy resin adhesive sheets.