公开(公告)号：US3787481A

公开(公告)日：1974-01-22

申请号：US3787481D

申请日：1969-04-07

Applicant: SNIA VISCOSA

Inventor： SICLARI F ,  MADERNO C ,  MAGNONI F ,  FULMINI S

IPC: C08G63/00 ,  B01J10/02 ,  B01J14/00 ,  B01J19/18 ,  C08G63/78 ,  C08G85/00 ,  C07C69/82

CPC classification number: B01J19/1887 ,  B01J10/02 ,  B01J19/1881 ,  B01J2219/0009 ,  B01J2219/00094 ,  C07C67/08 ,  C07C67/54 ,  C07C69/82

Abstract: A DEVICE FOR CONTINUOUSLY PERFORMING CHEMICAL PROCESSES AND REACTIONS WHICH REQUIRE HEAT ADMINISTRATION FROM THE OUTSIDE AND ARE CONDUCTIVE TO THE EVOLUTION OF VOLATILE BY-PRODUCTS, SUCH AS THE PROCESSES LEADING TO THE PRODUCTION OF SPINNABLE POLYESTERS. THE DEVICE COMPRISES A REACTOR HAVING SUBSTANTIALLY VERTICAL METAL WALLS, MEANS FOR INTRODUCING THE REACTANT AND THE REACTED PRODUCT WHICH IS RECYCLED AT THE REACTOR TOP, CENTRIFUGING MEANS FOR HURLING THE PRODUCTS INTRODUCED AT THE TOP OF SAID WALLS FOR CAUSING THEM TO DESCEND IN THE FORM OF A LIQUID FILM THEREALONG, AND MEANS FOR RECYCLING A FRACTION OF THE PRODUCT WHICH HAS BEEN COLLECTED AT THE BASE OF THE REACTOR, TOWARDS THE TOP THEREOF. A CHEMICAL PROCESS UTILIZING SUCH A REACTOR AND INVOLVING THE REMOVAL OF THE BY-PRODUCTS, SET FREE IN THEIR VOLATILE FORM AT THE TOP OF THE REACTOR AS THEY ARE EVOLVED AND SET FREE FROM SAID LIQUID FILM.

公开(公告)号：US3781213A

公开(公告)日：1973-12-25

申请号：US3781213D

申请日：1971-10-20

Applicant: SNIA VISCOSA

Inventor： SICLARI F ,  MAGNONI F ,  MORANDI B

IPC: B01F3/12 ,  C08G63/78 ,  C09K3/00

CPC classification number: C08G63/785 ,  Y02P20/582

Abstract: A METHOD AND AN APPARATUS ARE DISCLOSED FOR PREPARING PHTHALIC ACID-GLYCOL MIXTURES FOR ESTERIFICATION. A PROBLEM WHICH IS FREQUENTLY ENCOUNTERED IN PREPARING SUCH PASTE IS THE RETENTION OF THE HOMOGENEOUSNESS OF THEIR COM POSITION, ESPECIALLY IN CONTINUOUS ESTERIFICATION INSTALLATIONS. CONTRARY TO WIDELY ACCEPTED AND WELL ESTABILSIHED TECHNICAL VIEWS, IT HAS BEEN DISCOVERED THAT, BY KEEPING THE MIXTURES OR PASTES AT A COMPARATIVELY LOW TEMPERATURE, THE PREFERRED RANGE BEING BETWEEN 35*C. AND 20* C. THE PROBLEMS INDICATED ABOVE, AND OTHERS CONNECTED THEREWITH, ARE HAPPILY SOLVED AND THE UNDESIRABLE FORMATION OF LUMPS AND INCRUSTATIONS IS EFFETIELY PREVENTED.

公开(公告)号：US3757077A

公开(公告)日：1973-09-04

申请号：US3757077D

申请日：1971-03-22

Applicant: SNIA VISCOSA

Inventor： SICLARI F ,  MAGNONI F ,  BIANUCCI G

IPC: B23K26/14 ,  D01G1/02 ,  B23K27/00

CPC classification number: D01G1/025 ,  B23K26/1462

Abstract: A method and equipment for cutting slivers of continuous filaments of textile material into tuft fibres adapted for further spinning and twisting operations, wherein a continuous sliver formed by said filaments is advanced at a high speed in a plane and laser ray pulses are focalized on said plane in the form of a narrow window having a length greater than the width of said sliver, in order to cut the same into a plurality of tuft fibres having a predetermined length.