公开(公告)号：US2303588A

公开(公告)日：1942-12-01

申请号：US30212739

申请日：1939-10-31

Applicant: PETROLITE CORP

Inventor： STENZEL RICHARD W

IPC: C02F1/00

CPC classification number: C02F1/006

公开(公告)号：CA695800A

公开(公告)日：1964-10-13

申请号：CA695800D

Applicant: PETROLITE CORP

Inventor： STENZEL RICHARD W ,  TURNER DELBER W

IPC: B01D17/06 ,  B01D19/04 ,  B01F3/12 ,  C10G33/02 ,  C10M171/00

Abstract: Dispersions of particles in oil, as the continuous medium, are removed by passing the oil through an inter-electrode space of large length to gap ratio and applying a high voltage direct current, in which the bulk of the dispersed particles are coalesced and separate out in the early stage, and at a later stage particles are deposited on the electrodes by electrophoresis. Preferably the inter-electrode space is defined by a rod electrode centrally mounted in a tube of length to gap ratio 8 to 30:1 and preferably at least 12 to 25:1. A unidirectional voltage of 6 to 30 k.v. per inch of treating space is applied. A suitable apparatus consists of a cylindrical vessel 10 the cross-section of which is occupied by a cellular electrode assembly comprising tubes of circular or hexagonal or other cross-section 16 and mounted between upper and lower zones 13, 14. Each tube contains a rod electrode 17 suspended centrally therein and attached to a frame 19 connected to a high-voltage source of D.C. The oil dispersion may first be treated to remove coarse suspensions in a high turbulence electric treater 40, and then enters a manifold system 29 discharging streams of the oil through the vertical tube electrodes; spreaders 31 may be used. In the lower region, the oil is submitted to some turbulence and the bulk of the dispersed particles are coalesced, and then enters a quiescent zone 24 of higher voltage gradient, where finer particles are deposited on the tube electrode surface by electro-phoresis. Deposited material sinks slowly downwards on the tube surface to the bottom zone 32. In a modification, the level of the collected dispersed material is arranged to submerge the lower ends of the electrode tubes at L-L and forming a seal, by adjusting level control devices 35 controlling the discharge valve 34. The upper zone 13 may be in the form of a header provided with a collector pipe with openings to receive the rising oil discharged from each tube electrode. The lower inlet zone 14 may also have a series of vertical barrier walls against which the dispersion impinges before entering the tube electrodes, and replaces the manifold 29. The process may be applied to petroleum oils containing dispersed particles of water or caustic soda solution.

公开(公告)号：DE1036435B

公开(公告)日：1958-08-14

申请号：DEP0007962

申请日：1952-07-07

Applicant: PETROLITE CORP

Inventor： STENZEL RICHARD W

IPC: C10G33/02

公开(公告)号：GB737916A

公开(公告)日：1955-10-05

申请号：GB163852

申请日：1952-01-21

Applicant: PETROLITE CORP

Inventor： STENZEL RICHARD W

IPC: C10G33/02

Abstract: Emulsions, having a continuous phase of oil of animal, vegetable or mineral origin and only a minor percentage of dispersed-phase material, are broken electrically by advancing smooth-flowing side-by-side streams of the emulsion through electrode-bounded uniform-field zones of side-by-side unidirectional high-voltage electric fields, the treated oil issuing from such zones joining into a single stream therebeyond. The emulsions may be naturally-occurring or artificially made and may be aqueous emulsions of crude petroleum, of petroleum distillates such as gasoline, kerosene or diesel oil or of petroleum residua. The aqueous or oil phases may contain dissolved materials. In Fig. 5, emulsion is introduced into heat-insulated cylindrical vessel 50 as a radial spray by means of distributor 61. The radial spray passes through space 54 between live electrode 55 and grounded electrode 56, these electrodes being made up of concentric metallic rings. Thus, space 54 serves to break the emulsion partially so that the residual emulsion contains only a minor percentage (for example no more than 2 per cent) of dispersed-phase material. The emulsion then passes between a grid of interspaced electrodes 66 consisting of a plurality of concentric cylinders 67 interleaved by a plurality of concentric cylinders 69, and thereafter between a similar grid of interspaced electrodes 75. The treated oil is removed by means of collector 83 and pipe 85, while the coalesced water collects in the conical bottom of vessel 50 and is withdrawn continuously or intermittently through pipe 86.