1. A magnetic connecting tube for a screwdriver head, comprising:
a) a main body being a stage-shaped cylindrical tube with one end in connection with the polygonal bar and with the other end in shape of a polygonal hole, a slot and a ball hole being formed at the periphery of the polygonal hole, the slot and the ball hole joining the polygonal hole, an annular groove being formed in close vicinity to the distal end of the main body;
b) a push sleeve having a cavity with an arched groove and an internal ring groove on the wall of the cavity, the distal end of the push sleeve having a blocking ring;
c) an engaging piece engageable in the slot of the main body for exerting in cooperation with the push sleeve and the arched groove an engaging effect on an indentation of a polygonal screwdriver bit;
d) a compression ball;
e) a blocking ring;
f) a spring element interposed between the main body and the push sleeve;
g) a polygonal bar;
h) A stationary magnet fixed at the bottom of the polygonal hole of the main body with a magnetism opposing to that of the mobile magnet;
i) a mobile magnet movably disposed within the polygonal hole of the main body with a repelling force against that of the mobile magnet; and
j) a slide sleeve mounted on the mobile magnet that is synchronically movable with the slide sleeve, the slide sleeve being disposed at a position corresponding to that of the compression ball, the slide sleeve having an axial guide slot with a deep top and a shallow bottom
whereby, the mobile magnet is located under the expelling force created by the stationary magnet in an upwards floating position in the ordinary state; at this time, the push sleeve is fixed in place by the compression ball while the engaging piece 40 is located at a released position such that it has no problem to insert a polygonal screwdriver bit into the polygonal hole of the main body; in applying only a slight force to the polygonal screwdriver bit, the mobile magnet together with the slide sleeve can be compressed downwardly by the polygonal screwdriver bit; meanwhile, the compression ball is released along the axial guide slot; at that time, the push sleeve will be pushed downwardly by the resilient force of the spring element so as to engage the engaging piece into the arched groove; moreover, the other end of the engaging piece just fits into the indentation of the polygonal screwdriver bit, thereby fixing the polygonal screwdriver bit in place without being pulled out.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A process for the manufacture of 1233zd comprising the steps of:
(a) reacting 240fa and HF with a catalyst comprising one or more Lewis acid catalysts, in a reactor operating at high pressure to produce a product stream comprising 1233zd, HCl, HF, and other byproducts;
(b) distilling the product stream from step (a) into a first overhead product and a first bottoms product rich in HF;
(c) distilling the first overhead product from step (b) to form a second overhead product containing HCl and a second bottoms product containing organic components and HF;
(d) phase separating the second bottoms product from step (c) to separate the HF from the organic components; and
(e) caustic scrubbing, drying, and distilling the organic components from step (d) to provide purified 1233zd.
2. The process of claim 1, wherein the Lewis Acid catalyst is selected from TiCl4, SbCl5, and mixtures thereof.
3. The process of claim 2, wherein the catalyst is TiCl4.
4. A process for the manufacture of 1233zd comprising the steps of:
(a) reacting 240fa and HF without a catalyst in a reactor operating at high pressure to produce a product stream comprising 1233zd, HCl, HF, and other byproducts;
(b) distilling the product stream from step (a) into a first overhead product and a first bottoms product rich in HF;
(c) distilling the first overhead product from step (b) to form a second overhead product containing HCl and a second bottoms product containing organic components and HF;
(d) phase separating the second bottoms product from step (c) to separate the HF from the organic components; and
(e) caustic scrubbing, drying, and distilling the organic components from step (d) to provide purified 1233zd.
5. A process for making highly purified HCFC-1233zd by the reaction of 240fa and HF at a reactor pressure of from 150 psig to 600 psig wherein the purification of the HCFC-1233zd comprises the steps of:
(a) distilling the resulting product stream comprising HCFC-1233zd, HCl, HF, and other byproducts;
(b) distilling the overhead product from the step (a) distillation in a second distillation column to remove the HCl;
(c) phase separating the bottom stream from the second distillation in step (b) to isolate the HF; and
(d) purifying the phase separation bottom layer components from step (c) to yield purified HCFC-1233zd having a purity of 99.5% or greater, as measured using gas chromatography.