378 results about "Diluent" patented technology

The invention relates to an automatic solid chemical dilution device and a control method, the automatic solid chemical dilution device comprises a dissolving and stirring assembly, a material adding assembly, a pure water supply assembly, a nitrogen supply assembly, a detection and storage assembly and a control system, and the control system is electrically connected with the above assemblies. According to detection data of the liquid level height detection device, the electronic scale and the conductivity concentration meter, the adding amount, the adding speed and the stirring process of pure water and solid chemicals are automatically controlled, automatic deviation correction is executed when the detected concentration deviates from a target, and the diluent is fed into a finished product tank for storage when the concentration of the diluent is qualified. The automatic dilution device for the solid chemicals can realize automatic control of the whole dilution process, ensures the concentration stability and the dissolution uniformity, improves the production efficiency and the safety, and is suitable for the field with high requirements on solution precision and safety.

The invention provides a preparation method of a film-forming enhancer for water-based drilling fluid, which is characterized by comprising the following steps: A) mixing a phenolic compound, water and inorganic base, adjusting the pH value, adding a silicon reagent, and reacting to obtain a first reaction solution; b) mixing phenol, formaldehyde, a sulfonating reagent and the first reaction solution, and reacting to obtain a second reaction solution; c) mixing the second reaction solution with water to obtain a diluent, and reacting to obtain a third reaction solution; and cooling and drying the third reaction liquid to obtain the product. The film-forming enhancer is silicon-modified sulfonated phenolic resin and is prepared by reacting water-soluble silicate with phenols, formaldehyde, a sulfonic acid reagent and inorganic base at high temperature and high pressure. The film-forming enhancer provided by the invention can effectively improve the performance of a drilling fluid system, improve the quality of a mud cake and control the high-temperature and high-pressure filter loss, has a good reservoir protection effect, and forms a new technology integrating well wall stabilization, leakage prevention and stoppage, formation pressure bearing improvement and reservoir protection; and the requirements of slim hole drilling well wall stability, safe drilling and reservoir protection can be met.

The invention belongs to the technical field of iron ion detection, and particularly relates to a rapid detection method for ferric ions in water, which comprises the following steps: a fluorescent probe preparation step: taking trihydrate of copper nitrate and tryptamine, adding into a centrifuge tube in sequence, adding ultrapure water, performing ultrasonic dissolution, transferring into a high-pressure reaction kettle, and performing hydrothermal reaction to obtain a fluorescent probe; cooling to room temperature, centrifuging the obtained yellow green solution in a centrifugal machine, and filtering the supernate through a microfiltration membrane to obtain a copper-doped carbon quantum dot CuCDs stock solution, namely the fluorescent probe; analyzing and determining Fe < 3 + >: taking the diluent of the prepared CuCDs solution, adding the diluent into a centrifugal tube containing a Fe < 3 + > standard solution, uniformly mixing, carrying out fluorescent quantitative analysis and detection, and exploring the change rule of the fluorescence intensity ratio of CuCDs; according to the rapid detection method for Fe < 3 + > provided by the invention, the synthesized CuCDs have high sensitivity, can realize on-site rapid detection of Fe < 3 + > in a water medium, and shows a wide application prospect in the field of environmental monitoring.

In one example, a gas turbine system, includes a pressurized fluid delivery system configured to deliver into a combustor system, which includes a pressurized fuel fluid, a pressurized oxidant fluid; and a pressurized diluent fluid comprising a diluent. The gas turbine system also includes an oxidant fluid discharge system configured to control a first flow of the pressurized oxidant fluid incoming from the pressurized fuel delivery system into the combustor system, and a pressurized diluent injection system configured to control a second flow of the pressurized diluent fluid incoming from the pressurized fuel delivery system into an upstream diluted fuel rich combustion stage included in the combustor system, and into a. downstream diluted oxidant combustion stage included in the combustor system, wherein the pressurized diluent fluid comprises a. superheated fluid. The gas turbine system additionally includes a control system.

A process for oligomerizing olefins to distillate fuels in the presence of a diluent for absorbing the exotherm. Oligomerization may comprise oligomerizing a charge olefin stream in a first-stage oligomerization reactor which is oligomerized in a second-stage oligomerization reactor to provide an oligomerate stream. The oligomers are hydrogenated and stripped to provide a stripped distillate stream. The diluent may be taken from the stripped distillate stream.

The invention discloses thermally induced phase separation normal-pressure special engineering plastic powder and a preparation method thereof, and belongs to the technical field of high polymer materials, and the method comprises the following steps: mixing special engineering plastic granules, a diluent and a functional additive, and heating and dissolving in stages to form a homogeneous solution; then cooling at the speed of 10-300 DEG C / min to induce solid-liquid phase separation, and solidifying and separating out powder particles; after the diluent is removed through an extracting agent, powder is obtained through reduced-pressure suction filtration, solvent cleaning and vacuum drying. The method is operated under normal pressure, the limitation of a traditional high-pressure method is broken through, the phase separation process is synergistically optimized by regulating and controlling the solubility parameter and the cooling rate of a compound diluent and a functional additive, accurate control over the morphology and the particle size of the powder is achieved, and the obtained powder is high in sphericity degree and narrow in particle size distribution and has excellent fluidity and melting performance; the method is suitable for high-end fields such as laser sintering and electrostatic spraying, and the process is green and environment-friendly.

Systems and method for dispensing chemical include an eductor having a diluent inlet, a chemical pickup port, a discharge port, and a venturi fluidly coupled between the diluent inlet and the discharge port; a selector valve fluidly coupled to the diluent inlet and configured to control a flow of diluent into the diluent inlet; a sensor configured to measure a flow characteristic of the flow of diluent; and a controller operatively coupled to the selector valve. The controller includes at least one processor and memory storing instructions that, when executed, cause the at least one processor to perform operations including opening the selector valve to allow the flow of diluent into the diluent inlet; determining a dispense duration based on the measured flow characteristic and an amount of a chemical to be dispensed; and in response to determining that the dispense duration has elapsed, closing the selector valve.

This product is a sample preparation tube strip used to extract or purify target substances from samples, such as in nucleic acid isolation. It is used in combination with other sample preparation devices, as shown in the "Reference Diagram Showing the Usage State." The numbers 1 through 6 in the "Front View" of this product correspond to the six holes 1 through 6 in the "Top View" of this product. In the nucleic acid isolation process, first, a magnetic stirring ball and magnetic stirring ball diluent are placed in hole 1, a dissolving solution in hole 2, different types of cleaning solutions in holes 3, 4, and 6, and an eluent in hole 5. The following steps are then performed: (1) One or more of this product are placed in a sample preparation tube strip rack, a magnetic stirring bar cover is inserted into hole 1, and the sample to be processed or purified is placed in hole 2. (2) The magnetic stirring bar cover is driven by a drive mechanism and rotates within hole 1, adsorbing the magnetic stirring ball to its outer surface. (3) The magnetic stirring bar cover with the magnetic stirring ball adsorbed to its outer surface is moved into hole 2, where the magnetic stirring ball adsorbs the nucleic acid in the sample. (4) The magnetic stir bar cover that has undergone the process (3) is moved in the order of hole 3, hole 4, and hole 6, and impurities in the sample are washed away. (5) The magnetic stir bar cover that has undergone the process (4) is moved into hole 5, and the nucleic acid is released from the magnetic stir ball under heating conditions. (6) The magnetic stir bar cover that has undergone the process (5) is returned to hole 1, and the nucleic acid remains in hole 5.

The invention provides a method for detecting related substances of sucrose octasulfate salt auxiliary materials, and particularly relates to the field of medicines. An SCX cation exchange chromatography filler and a C18 filler are mixed according to the ratio of (0.8-1.2): (3-5) to serve as a filling agent; the specification of a chromatographic column is CAPCELLPAK CR C18 + SCX 5 [mu] m, 250 * 4.6 mml.D.; 18-22 mM / L ammonium formate and 0.08-0.12% formic acid are used as a mobile phase A, and acetonitrile is used as a mobile phase B; a detector is CAD, the spray temperature is High, the collection frequency half-peak width is 0.1-0.2 min, the column temperature is 28-32 DEG C, the flow rate is 0.8-1.2 ml / min, and the sample injection volume is 4-6 [mu] l; wherein acetonitrile and water in a ratio of (3-5): (5-7) are used as diluents, and gradient elution is carried out; the method provided by the invention can effectively separate and accurately analyze each impurity, has strong specificity and good separation degree, and can effectively control the product quality.

The utility model relates to a dilution device for configuration of benzene series standard substances, which comprises a dilution tank mounted in a frame, a discharge pipe arranged at the bottom of the dilution tank, a detachable tank cover arranged at the top of the dilution tank, feed pipes communicated with the inside of the dilution tank and arranged on two sides of the tank cover respectively, and the top ends of the feed pipes penetrate through the top of the frame. Two positioning seats are fixed to the top of the frame and located on the outer sides of the corresponding feeding pipes respectively, funnels are arranged in the positioning seats, and the bottoms of the funnels are inserted into the corresponding feeding pipes. A certain amount of proportioned benzene series raw materials are poured into the diluting tank through one funnel, a certain amount of proportioned diluent is poured into the diluting tank through the other funnel, the benzene series raw materials and the diluent are guided to the rotating frame through the flow guide pipes to be mixed, and the benzene series raw materials and the diluent are mixed along with rotation of the rotating frame. According to the device, benzene series raw materials and diluent can be fully and rapidly mixed, and the mixed benzene series raw material diluent falls to the bottom in the dilution tank.

Treaters that are configured to remove one or more contaminants from hydrocarbon streams recovered from a polymerization process are located upstream of the monomer and diluent recovery unit.

The present invention discloses a rapid hydrogen peroxide test kit and a method of using the same, the rapid hydrogen peroxide test kit comprising a sample diluent and a test strip containing a chromogen for detection and a chromogen for quality control in a dry environment. The sample diluent comprises 100-500 mM ammonium oxalate, 0.3-2.0 mM 8-hydroxyquinoline, 50-500 mM sodium chloride, and 10-100 mM of a first pH adjuster for pH 4.5-7.0.

The invention provides an ultralow-density proppant based on solid waste compounding and a preparation method of the ultralow-density proppant, and belongs to the technical field of proppants. The preparation method comprises the following steps: uniformly mixing the epoxy resin, the diluent, the silane coupling agent and the solid waste powder, and aging to obtain a first mixed system; adding the curing agent and the surfactant into the deionized water, and stirring until the curing agent and the surfactant are completely dissolved to obtain a second mixed system; adding the second mixed system into the first mixed system at a preset temperature in a first stirring state, heating at the preset temperature, treating in a second stirring state until the reaction is finished, filtering, washing with clear water, and drying to obtain the ultralow-density proppant. The solid waste powder is adopted as the filler, the proppant cost is reduced while the strength of the proppant is improved, the liquid and the powder are used as the main raw materials to generate solid particles, and the resin is adopted as the main raw material to achieve the advantages of low density, high strength and the like.

The present invention provides a liquid silicone rubber composition and its application. The liquid silicone rubber composition mainly comprises silicone rubber, a crosslinking agent, a catalyst, and a diluent, and secondarily comprises a filler. The catalyst is a weak acid, which synergistically enhances the effect with the crosslinking agent and helps to slow the curing speed of the liquid silicone rubber. The liquid silicone rubber composition has good fluidity, is not diluted by water, and has a density of 1.07 to 1.12 g / cm 3 Adjustable, salt-resistant and high-temperature resistant, it can slowly solidify in a high-temperature and high-mineralization environment: after the liquid silicone rubber composition is mixed with formation water with a mineralization of 220,000 mg / L, it is placed in a 150°C oven for 8 to 20 hours, and its strength reaches F grade. It is suitable as a plugging agent for use in profile control and water plugging operations in high-temperature and high-salt rock fracture-cavern oil reservoirs.

The utility model belongs to the technical field of impurity removal equipment, and particularly relates to impurity removal equipment for diluent production, which comprises a tank body provided with a feed port and a discharge port, a feed pipe extending into the tank body is arranged at the feed port, one end of the feed pipe positioned in the tank body is provided with a uniform distribution head, the uniform distribution head is provided with a plurality of feed holes along the axial direction of the tank body, and the feed holes are communicated with the discharge port. A plurality of slotted holes are formed in the radial circumference of the tank body, meanwhile, a first filter screen for primary filtration of a diluent and a second filter screen for secondary filtration of the diluent are sequentially arranged below the uniform distribution head, and the slotted holes are parallel to the axial direction of the tank body; the uniform distribution head is arranged at one end of the feeding pipe located on the tank body, the multiple feeding holes are formed in the uniform distribution head in the axial direction, and the multiple groove holes are formed in the circumferential direction in the radial direction, so that a diluent entering the feeding pipe can be uniformly distributed into the multiple outlets in the axial direction and the radial direction to uniformly fall onto the first filter screen; the dispersing effect on the diluent can be effectively improved, the filtering efficiency is improved, additional energy consumption is avoided, and the energy consumption is prevented from being increased.

The application belongs to the technical field of combined filling equipment, and particularly relates to a vertical combined filling equipment and a use method thereof. In view of the problem that the internal part of a mixing device cannot be cleaned in time, stirring operation needs to be performed for a long time, and the preparation efficiency of foamed concrete slurry is low, the following scheme is provided. The vertical combined filling equipment comprises a lower support, an upper support is fixed on the top of the lower support through bolts, a stirring and mixing box is fixed on the top of the lower support through bolts, a concrete box and two preparation boxes are fixed on the top of the upper support through bolts. In the application, foaming agent diluent can be uniformly sprayed on the stirring concrete through the spraying structure, so that the mixing of the concrete and the foaming agent can be quickly completed, the preparation efficiency of the foamed concrete slurry is improved, in addition, the start and stop of the strong magnet can be controlled through the pressure of the concrete on the sliding plate, the lifting of the iron nut ring can be controlled through the strong magnet, and the inner wall of the stirring and mixing box can be automatically cleaned.

This invention discloses a high-gravity oil-solid separation device and method. The device comprises two parts: high-gravity separation and membrane filtration separation. The high-gravity separation part includes a device body, an oil slurry inlet, a diluent inlet, a pipeline mixer, a rotating shaft, a liquid distributor, separation components, a slurry enrichment plate, a heavy phase outlet, a centrifugal pump, a light phase outlet, a motor, and a nitrogen inlet. The membrane filtration separation part includes pipelines and sliding baffles, with the pipelines divided into membrane filtration pipelines and diluent inlet pipelines. This invention first discharges most solid particles through high-gravity separation, and then uses membrane filtration separation to improve the solidification effect, overcoming the limitations of a single separation mode, enhancing the separation effect and long-term operational stability, while simplifying the process flow and saving floor space.

A method for reducing the solid content in catalytic cracking slurry comprises: (1) mixing an auxiliary agent with raw oil and heating it to obtain a raw oil liquid, wherein the auxiliary agent is petroleum wax with a carbon number between C20 and C43 and a normal paraffin mass content of 35 to 60%; (2) mixing a diluent with the raw oil liquid in step (1), cooling to obtain a liquid-solid mixture, and performing solid-liquid separation to obtain a desolidified oil liquid and a wax paste, wherein the diluent is a C3-C6 fatty ketone and / or a C6-C8 aromatic hydrocarbon; (3) removing the diluent from the desolidified oil liquid to obtain a catalytic cracking slurry desolidified with solids, and removing the diluent from the wax paste to obtain the auxiliary agent containing solids. The method provided by the present invention has simple steps, and the solid removal rate of the catalytic cracking slurry is greater than 88%.

The invention relates to the technical field of Baijiu processing, and discloses Baijiu production dilution equipment which comprises a support, a liquid collecting box, a plurality of quantitative cylinders, a driving assembly and a plurality of dilution assemblies. The support comprises a bottom plate and a top plate. A plurality of first liquid outlet holes are formed in the bottom of the liquid collecting box, and sealing assemblies are arranged at the first liquid outlet holes; the quantitative cylinders are arranged between the liquid collecting box and the top plate in a sliding mode and correspond to the first liquid outlet holes in a one-to-one mode, and trigger assemblies matched with the corresponding sealing assemblies are arranged in the quantitative cylinders; the driving assembly is used for selectively lifting the quantitative cylinder, so that the triggering assembly in the quantitative cylinder is selectively matched with the corresponding sealing assembly in an opening and closing manner; the dilution assemblies are in one-to-one correspondence with the quantitative barrels, each dilution assembly comprises a dilution barrel, a stirring assembly and a liquid conveying pipe, and the dilution assemblies are used for mixing white spirit and diluent. Quantitative diluent can be circularly released into the dilution cylinder for multiple times, so that the flavor and taste of white spirit can be better maintained, and the generation of precipitates can be reduced.

The present invention discloses a composite scale inhibitor with a long action distance for oilfield water injection development, belonging to the field of oilfield chemical applications. The scale inhibitor is composed of modified sodium polyepoxy adipate, maleic anhydride-styrene copolymer, and a diluent. The scale inhibitor of the present invention is a composite scale inhibitor, which has a good anti-scaling effect on CaCO3 scale, BaSO4 scale, and SiSO4 scale. Compared with conventional scale inhibitors, the scale inhibitor of the present invention has the characteristic of not being easily adsorbed by formation rocks, indicating that in actual water injection operations, the action distance is relatively long. Not only does it reduce the need for the scale inhibitor to be replenished in the later stage and reduce the construction frequency, but it also increases the effective period of the water injection operation, achieving the purpose of reducing costs and increasing efficiency.

The utility model discloses a foaming agent diluting device for foaming magnesium oxychloride cementing materials, which comprises a base, a diluting barrel arranged at the top end of the base, a barrel cover arranged at the top end of the diluting barrel, a first water conveying pipe fixedly connected to the middle of the barrel cover, a second adjusting valve arranged on the first water conveying pipe, and a driving motor fixedly mounted in the middle of the bottom end of the base. An output shaft of the driving motor is fixedly connected with a stirring shaft, and the top end of the stirring shaft penetrates through the base and extends into the diluting barrel. A driving motor drives a stirring shaft and a plurality of stirring rods which are equidistantly arranged in a staggered manner to stir a foaming agent and a diluent, so that the foaming agent and the diluent are quickly and uniformly mixed, the dilution efficiency and quality are improved, an external water source can enter a telescopic water spraying mechanism through a series of channels after stirring is completed, a nozzle sprays water while rotating, and the stirring rods and the inner wall of a dilution barrel are comprehensively cleaned; and material residue and blockage are prevented, the cleaning difficulty and time are reduced, the cleanliness and good state of the device are kept, and the service life is prolonged.

The application discloses a kind of high-activity green cleaning agent, its preparation method and application, the high-activity green cleaning agent includes stock solution and diluent liquid;The stock solution is formed by esterification reaction by mixing and heating 2-ethylhexyl phosphate and hydroxyethylidene diphosphonic acid according to weight ratio 1.8-3:1;And / or the stock solution includes 2-ethylhexanol, phosphite, acetic acid-2-ethylhexyl ester, polyisobutylene succinic anhydride and ethylhexyl phosphate;The diluent liquid is formed by mixing according to weight ratio 1:4-3:7 by content >99% formaldehyde and oligomeric water cluster;The weight percentage of the stock solution is 0.8%-1.3%.The application also discloses fuel containing the above-mentioned high-activity green cleaning agent.The high-activity green cleaning agent of the application is a pure petroleum product, is a new type of fuel modifier, by changing the physical properties of fuel to achieve its synergistic effect, oil saving, carbon cleaning, emission reduction effect, suitable for popularization and application.

The invention relates to the technical field of waste recovery, and discloses a waste recovery device for electrolytic aluminum production, which comprises a recovery crusher, a liquid curtain covering mechanism is arranged at a feed port of the recovery crusher, and the liquid curtain covering mechanism is configured to spray an alkaline diluent to the feed port, so that the crushed waste is in a slurry state; the dehydration mechanism is used in combination with the recycling crusher, the feeding end of the dehydration mechanism is connected with the discharging end of the recycling crusher, and the dehydration mechanism is used for carrying out solid-liquid separation treatment on the slurry-shaped waste; the liquid curtain covering mechanism is arranged at the feeding port of the recycling pulverizer, alkaline diluent is sprayed, dust flying in the pulverizing process is effectively restrained, the risk of dust explosion is reduced, the working environment is improved, meanwhile, waste is directly in a slurry shape after being pulverized, and follow-up treatment is facilitated.

The invention discloses a device and a method for diluting a defoaming agent for cleaning a galvanized wire. The device comprises a diluting box body, a stirring assembly, a visual assembly, an injection port, an intermediate control box, a self-cleaning device and the like. The bottom of the dilution box body is inclined, and a self-cleaning device is embedded in a discharge hole, consists of an elastic scraper and a linkage mechanism and is mechanically connected with a manual valve to realize automatic cleaning. A transparent cover plate of the visual assembly is matched with a flexible sealing piece, and an exhaust device can adjust the internal humidity. The double-layer hollow structure is filled with a drying agent, and the inner-layer hydrophobic micro-nano texture reduces liquid attachment. The control method comprises the following steps: proportionally mixing the defoaming agent and desalted water, setting the adding frequency according to the quality and speed of the strip steel, adding the diluent in batches by the intermediate control box, and monitoring the liquid level. The problems of poor defoaming effect of a defoaming agent, unstable cleaning process, overflow of cleaning liquid and the like can be solved, convenient operation and efficient production are realized, and the consumption and cost of the cleaning liquid are reduced.

The present invention relates to the technical field of preparing 4-methyl-1-pentene, and specifically relates to a method and apparatus for preparing 4-methyl-1-pentene. The method comprises: causing a raw material containing propylene, a coke formation inhibitor and an optional diluent to undergo a dimerization reaction in the presence of a catalyst; performing gas-liquid separation on a resulting reaction mixture, to obtain a gas and / or supercritical phase flow and a liquid phase flow; splitting the gas and / or supercritical phase flow into two portions, a portion of the gas and / or supercritical phase flow undergoing heat recovery treatment and being returned as a recycled stream to the dimerization reaction; and performing distillation of the remaining portion of the gas and / or supercritical phase flow and the liquid phase flow, to obtain 4-methyl-1-pentene. The method and the corresponding apparatus enable efficient temperature control, high 4M1P selectivity, and long-cycle operation with relatively low energy consumption.

The application discloses a treatment method of electroless nickel plating waste liquid, which comprises the following steps: waste liquid pretreatment, waste liquid dephosphorization, waste liquid deironing, waste liquid denickelization, nickel-iron purification and biochemical treatment, and the whole process steps are reasonably designed, the resource treatment of nickel and phosphorus in the waste liquid is realized under the premise of not introducing new pollution factors. By adding an oxidizing agent, high ferric acid is used to remove phosphorus ions, then by adjusting the pH value of the waste liquid, most of the iron ions are precipitated, then modified biochar is used to remove most of the nickel ions, then sulfide precipitant and PAM diluent are added to remove the remaining nickel ions and iron ions, finally, hydrolysis acidification and MBR process are used to quickly remove the remaining complex organic matters, the whole process flow is short, the amount of reagent used is small, and the cost is low.

A substance dispensing system for a biological sample analysis instrument is provided. The present invention relates to a method for preparing a sample for evaluation, the method comprising: aspirating a volume of sample from a first reservoir to a dispensing tip; and diluting the sample by dispensing the volume of sample from the dispensing tip to a dilution reservoir, the dilution reservoir containing a diluent; and flushing the dispensing tip with at least a portion of a fluid substance from the dilution reservoir, the fluid substance comprising the sample and the diluent.

The invention discloses a method for extracting technetium from PUREX process waste liquid. The method comprises the working procedures of material blending, extraction, washing, reduction reverse extraction and reverse extraction. According to the technetium extraction and purification process, the technetium is separated from elements such as zirconium, niobium, ruthenium, uranium, neptunium and plutonium by using the technetium as a raw material, tributyl phosphate (TBP) as an extracting agent and hydrogenated kerosene (OK) as a diluent, meanwhile, the economy and safety of the reagents adopted by the process are verified by engineering, and the operation process of each procedure also meets the requirements of high flux, continuous treatment and remote operation.

The invention discloses an organic-solvent-free diluent compatibility testing device and testing method, and particularly relates to the technical field of compatibility testing, the organic-solvent-free diluent compatibility testing device comprises a first barrel body, a second barrel body and a third barrel body, the first barrel body is used for mixing an organic-solvent-free diluent; the shaft body is arranged in the first barrel body, and the shaft body can rotate in the direction of the central axis of the shaft body; a set of mechanical linkage stirring device integrating forward rotation, axial reciprocating motion and reverse rotation is used for stirring a diluent without an organic solvent, a complex and periodically-changing flow field is formed in the first barrel, materials in a central area are pushed away and pulled close in a reciprocating mode, and therefore the diluent without the organic solvent is stirred. Materials near the tank wall are disturbed by the first plate body which is reversely stirred, and the whole stirring vortex direction is continuously changed, so that a mixing dead angle is effectively broken, the materials are prevented from being accumulated on the tank wall or the axis, efficient and uniform mixing is realized, and a uniform sample basis is provided for a subsequent compatibility test.

A viscosity index improver (VII) or viscosity modifier (VM) concentrate comprising: from about 60 parts to about 95 parts of a diluent oil; and from about 5 parts to about 40 parts of star diblock and triblock copolymers having a coupling efficiency greater than about 50%; the concentrate comprises at least 50 wt% of the diluent oil and from about 6.0 wt.% to about 14.0 wt.% of the star and linear diblock and triblock copolymers. The diblock and triblock copolymers possess the ability to thicken in concentrates without gelation or slow flowing material, relatively uniformly across different types or Groups of base stocks / diluents, at high active ingredient concentrations and handling temperatures.