公开(公告)号：US3802917A

公开(公告)日：1974-04-09

申请号：US23993972

申请日：1972-03-31

Applicant: DOW CHEMICAL CO

Inventor： TREAT L ,  HART P

IPC: B01D17/04 ,  C10G33/04 ,  C10M175/04 ,  B08B7/04

CPC classification number: C10M175/04 ,  B01D17/042 ,  B01D17/047 ,  C10G33/04

Abstract: Accumulations of tramp oils are removed from oil-in-water emulsions utilized as cleaners, lubricants and coolants by introducing into the emulsion a small but effective amount of a high molecular weight, water-soluble anionic polymer and heating the treated emulsion at an elevated temperature whereby the tramp oils are coalesced and floated to the surface of the emulsion. The essentially continuous but distinct tramp oil and emulsion phases are then readily separated.

公开(公告)号：US3779265A

公开(公告)日：1973-12-18

申请号：US3779265D

申请日：1972-01-20

Applicant: DOW CHEMICAL CO

Inventor： HART P

IPC: B03B13/04 ,  B03D1/00 ,  G05D21/00

CPC classification number: B03D1/00 ,  B03B13/04 ,  Y10T137/2509

Abstract: A method and apparatus necessary to carry out the method of continuous measurement, recordation, and correction of the varying electrode potential or E.M.F. within an ore slurry containing conditioning components in a mineral flotation system by immersing in cooperative relationship a tungsten oxide electrode and a silver chloride electrode in the slurry, relaying the potential thereby obtained to a recording instrument or to an optimizer or to both and either manually, or automatically by means of the optimizer, adjusting the rate of feed of at least one conditioning component of the slurry to correct the potential or E.M.F. to provide a more efficient process.

Abstract translation: 执行连续测量，记录和校正变化的电极电位或E.M.F.的方法所需的方法和装置。 在矿物浮选系统中含有调理组分的矿浆中，通过以协作关系将浆料中的氧化钨电极和氯化银电极浸入，将由此获得的电位中和到记录仪器或优化器，或者手动， 或通过优化器自动调整浆料的至少一个调节组分的进料速率以校正电位或EMF 提供更有效的过程。

公开(公告)号：US3834529A

公开(公告)日：1974-09-10

申请号：US21922172

申请日：1972-01-20

Applicant: DOW CHEMICAL CO

Inventor： HART P

IPC: B03B13/00 ,  B03B9/00

CPC classification number: B03B13/005

Abstract: Two open-end tubes are vertically immersed, open-end down at substantially the same level, one near the place of entrance of a liquid in process in a series of treating vessels and the other near the outlet of the liquid whereby densities of the liquid at the respective locations are measured by means of a suitable pneumatic assembly, the density values are translated to and recorded as a pneumatic pressure differential and the pneumatic pressure differential is either (1) automatically converted to and recorded in meaningful values and the indicated adjustments manually made to restore and tend to maintain the optimum density differential, or (2) directed to an optimizer whereby optimum adjustments are automatically made to restore and tend to maintain a maximum density differential. Where a fluctuating level of liquid exists, two probes immersed at different depths to define a fixed stratum may be used in cooperation to obtain one density value.

Abstract translation: 两个开放式管子垂直浸入，开放端在基本上相同的水平面上，一个在一系列处理容器中的液体入口附近，另一个位于液体出口附近，液体的密度 在相应的位置通过适当的气动组件测量，密度值被转换为并作为气压差记录并且气动压力差（1）自动转换为有意义的值并且指示的调整被手动地转换 使其恢复并趋向于保持最佳密度差，或（2）指向优化器，从而自动进行最佳调整以恢复并趋于保持最大密度差。 在存在波动水平的液体的情况下，可以协同使用浸入不同深度以限定固定层的两个探针以获得一个密度值。

公开(公告)号：US3801661A

公开(公告)日：1974-04-02

申请号：US3801661D

申请日：1972-07-11

Applicant: DOW CHEMICAL CO

Inventor： HART P ,  FRIEDLI H

IPC: B01J23/85 ,  B01J27/043 ,  B01J27/047 ,  B01J27/049 ,  C07C5/333 ,  C07C5/20

CPC classification number: B01J27/049 ,  B01J23/85 ,  B01J27/043 ,  B01J27/047 ,  C07C5/3332

Abstract: A SELECTIVE PROCESS FOR THE CONTINUOUS DEHYDROGENATION OF NONAROMATIC C3-C5 HYDROCARBONS TO DERIVATIVES HAVING A HIGHER DEGREE OF UNSATURATION COMPRISING PASSING A MIX TURE OF THE HYDROCARBON, STEAM AND H2S THROUGH A SULFIDED METAL CATALYST AT A CONVERSION BELOW ABOUT 70%.