405results about "Crystallization regulation/control" patented technology

This invention relates to novel methods for affecting, controlling and/or directing various crystal formation, structure formation or phase formation/phase change reaction pathways or systems by exposing one or more components in a holoreaction system to at least one spectral energy pattern. In a first aspect of the invention, at least one spectral energy pattern can be applied to a crystallization reaction system. In a second aspect of the invention, at lest one spectral energy conditioning pattern can be applied to a conditioning reaction system. The spectral energy conditioning pattern can, for example, be applied at a separate location from the reaction vessel (e.g., in a conditioning reaction vessel) or can be applied in (or to) the reaction vessel, but prior to other (or all) crystallization reaction system participants being introduced into the reaction vessel.

A process is provided for making sterile aripiprazole having an average particle size less than 100 microns but preferably greater than 25 microns employing an impinging jet crystallization procedure. The resulting bulk aripiprazole of desired particle size may be used to form a sterile freeze-dried aripiprazole formulation, which upon constitution with water and intramuscular injection releases aripiprazole over a period of at least about one week and up to about eight weeks.

The invention discloses a continuously controllable acesulfame crystallization device. The continuously controllable acesulfame crystallization device comprises: a crystal growing device, a first conveying pump, a first-grade crystallizer, a second conveying pump, a second-grade crystallizer, a third conveying pump, a thickening device, a fourth conveying pump and a crystal slurry tank; the crystal growing device comprises at least one crystal growing kettle; a discharging hole of each crystal growing kettle is connected with a stop valve in series and then is communicated with an inlet of the first conveying pump; the first-grade crystallizer comprises a first-grade crystallizing kettle, a first-grade cooler and a first-grade circulating pump; an outlet of the first conveying pump is communicated with a lower circulating hole of the first-grade crystallizer; the second-grade crystallizer comprises a second-grade crystallizing kettle, a second-grade cooler and a second-grade circulating pump; the discharging hole of the first-grade crystallizing kettle is communicated with the inlet of the second conveying pump; the outlet of the second conveying pump is communicated with the lower circulating hole of the second-grade crystallizer; the discharging hole of the second-grade crystallizing kettle is communicated with the thickening device through the third conveying pump; the outlet of the thickening device is communicated with the inlet of the crystal slurry tank through the fourth conveying pump. The crystallization device provided by the invention is high in production efficiency and an obtained acesulfame crystal has good quality and large granularity.

This invention relates to controlled preparation of fine particles such as nano-crystalline films and powders with at least one solvent being in a supercritical state. It provides methods, measures, apparatus and products produced by the methods. In other aspects, the invention relates to further treatment of formed particles such as encapsulation of formed primary particles, and methods and measures for collection of formed substances in a batch wise, semi-continuous or continuous manner.

The present invention relates to a antisolvent solidification process wherein a liquid medium comprising at least one organic or inorganic compound which is to be solidified is forced through a membrane into one or more antisolvents, or wherein one or more antisolvents are forced through a membrane into a liquid medium comprising at least one organic or inorganic compound which is to be solidified, yielding a composition comprising solid particles comprising said organic and/or inorganic compound(s).

This invention relates to novel methods for affecting, controlling and/or directing various reactions and/or reaction pathways or systems by exposing one or more components in a holoreaction system to at least one spectral energy pattern. In a first aspect of the invention, at least one spectral energy pattern can be applied to a reaction system. In a second aspect of the invention, at least one spectral energy conditioning pattern can be applied to a conditioning reaction system. The spectral energy conditioning pattern can, for example, be applied at a separate location from the reaction vessel (e.g., in a conditioning reaction vessel) or can be applied in (or to) the reaction vessel, but prior to other reaction system participants being introduced into the reaction vessel.

The invention relates to novel methods for affecting, controlling and/or directing various reactions and/or reaction pathways or systems by exposing one or more components in a holoreaction system to at least one spectral energy pattern. In a first aspect of the invention, at least one spectral energy pattern can be applied to a reaction system. In a second aspect of the invention, at least one spectral energy conditioning pattern can be applied to a conditioning reaction system. The spectral energy conditioning pattern can, for example, be applied at a separate location from the reaction vessel (e.g., in a conditioning reaction vessel) or can be applied in (or to) the reaction vessel, but prior to other reaction system participants being introduced into the reaction vessel.

At least two types of fluids to be processed are mixed in a thin film fluid formed between at least two processing surfaces which are approachably and separably disposed facing each other. At least one processing surface rotates relative to the other, and a substance to be separated giving a controlled crystallite diameter is caused to separate. Specific conditions related to a fluid to be processed are varied to control the crystallite diameter of the substance to be separated. The specific conditions are the type of substance to be separated; the concentration of the substance to be separated included in the raw material fluid and/or substance included in the separating fluid; the pH of the raw material fluid and/or separating material fluid; the introduction temperature of the raw material fluid and/or separating fluid; and the introduction velocity of the raw material fluid and/or separating fluid.

The invention relates to a novel procedure for the production of a high yield of small crystalline particles of a narrow size distribution.

A MEG reclamation process includes the step of increasing above 2,000 ppm the divalent metal salts concentration of a rich (wet) MEG feed stream flowing into a precipitator. The increasing step includes routing a salts-saturated MEG slipstream from the flash separator it to the precipitator. The slipstream may be mixed with a fresh water feed stream, a portion of the rich MEG feed stream, or some combination of the two. The rich MEG feed stream also may be split into two streams, with a portion of the stream being heated and routed to the flash separator and the other portion being combined as above with the removed slipstream. The process can be performed on the slipstream after dilution and prior to entering the precipitator or after being loaded into the precipitator. Removal of the insoluble salts may be done in either a batch or continuous mode.

The invention discloses a device capable of controlling reaction crystallization process efficiently, intelligently and accurately. The device comprises a main device reaction kettle, a constant temperature water bath device is mounted on the outer side of the main device, a feeding device is mounted on the upper portion of the main device, a stirring device, a pH electrode and a conducting electrode are mounted on the upper portion of the main device; the constant temperature water bath device, the feeding device, the stirring device, the pH electrode, the conducting electrode and the like are connected with a programmable logic controller PLC automatic control system to realize automatic intelligent control, simultaneously particle sizes of the products are in real-time monitored by a on-line particle size measurement system. The device is simple and clear in whole structure, fully automatic measurement, feedback and control during the reaction crystallization process are realized, manual operating cost and manual operating errors are reduced to make the reaction crystallization process perform in a setting reaction condition all the time, accordingly quality and stability of thedesired products are guaranteed.

The invention provides a solventing-out crystallization technique device and method through auxiliary control of films, and belongs to the technical field of crystallization engineering. When a crystallization solution is added to a raw material pot, a solventing-out agent is added to a material-liquid pot, electronic scales, a computer, a stirring device and temperature controlling devices are started, and after a system is stable, squirm pumps of the material-liquid pot are started, so that solventing-out agents can circulate between the material-liquid pot and a film assembly; and after the solventing-out agent is stable in circulation, the squirm pump connected to the raw material pot is started so that the crystallization solution enters the film assembly. The solventing-out agent and the crystallization solution which are in sufficient contact in the film assembly can perform nucleation growth in the film assembly, and then the solventing-out agent and the crystallization solution, after the nucleation growth, can flow into an external storing pot for filtration and post-treatment; and the solventing-out agent and the crystallization solution can also perform nucleation growth outside the film assembly, and after solutes are wholly dissolved, filtration is performed. The electronic scales record the addition quantity of the solventing-out agent in a real-time manner, and the addition quantity of the solventing-out agent is systematically controlled through controlling films and operation conditions, so that ideal crystal products are obtained.

The invention relates to a constant-gradient cooling crystallization system and an operation method thereof and belongs to the technical field of crystallization. The constant-gradient cooling crystallization system comprises a crystallizer, a compressor, a condenser, a condensation water tank and a vacuum pump; an exhaust of the crystallizer is connected with an entry of the compressor, an exit of the compressor is connected with an air-side entry of the condenser, the air-side entry of the condenser is connected to the condensation water tank, and the vacuum pump is connected to the condensation water tank. By the arrangement that the compressor is taken as vacuum-pumping equipment of the condenser, control on crystal size and cooling rate is realized through matching of compression ratio of the compressor and sucking rate; the constant-gradient cooling crystallization system is simple in structure, few in accessory equipment, convenient in regulating and controlling of crystallization process, and uniform in crystal size.

The invention provides a multistage continuous crystallization method of short rod-like methionine crystals. The method includes: connecting a plurality of crystallizers in series; under the action ofa circulating device, dissolving a methionine raw material at 80-130DEG C; letting the dissolved feed solution enter a first stage crystallization kettle, and controlling the kettle temperature at 60-80DEG C; enabling the slurry to enter a second stage crystallization kettle, and controlling the kettle temperature at 40-60DEG C; enabling the slurry to enter a third stage crystallization kettle, and controlling the kettle temperature at 25-40DEG C; letting the slurry enter a fourth stage crystallization kettle, and controlling the kettle temperature at 15-25DEG C; letting the final slurry flowout of the crystallization kettle and enter a solid-liquid separation system, discharging the separated solid out of the system, and returning part of the mother liquor into a dissolution kettle forfurther circulation, with the circulation volume being 20-60% of the mother liquor volume. The stage number of the crystallization kettles is supposed to be optimized according to the actual situation, and the general ideal situation is 2-4 stages. The prepared methionine crystals have short rod-like crystal habit, the crystal size is uniform, the bulk density is high, the fluidity is good, the quality is stable, the operation is simple, and the production efficiency is high, therefore the method is suitable for large-scale industrial production.

The invention discloses a multi-effect evaporation concentration technology, a multi-effect evaporation crystallization technology and a multi-effect evaporation concentration device of a solution containing sulfuric acid and sulfate. The technologies and the device are characterized in that low-temperature-difference heat transfer flow evaporation is adopted; step-by-step secondary steam series preheating is adopted; an acid bath is led as an evaporation crystallization carrier; and last-effect or last-two-effect evaporation crystallization is adopted. The evaporation concentration and crystallization device mainly comprises (1-n)-effect evaporation crystallizers, (1-n)-effect circulating pumps, 1-(n-1)- or 1-(n-2)-stage preheaters, condensers and vacuum devices. According to the technologies and the device, a steam-water ratio of acid bath 5-7-effect evaporation crystallization reaches an advanced level of 0.17-0.19; a steam-water ratio of acid water and two-bath 6-8-effect evaporation crystallization reaches an advanced level of 0.13-0.15; a steam-water ratio of a low-concentration acid water 7-9-effect evaporation concentration device can further reach an advanced level of 0.09-0.11, but the state-of-the-art steam-water ratio of 16-stage flash evaporation crystallization is 0.255 in the current industry.

The invention discloses energy-saving evaporative crystallization equipment for a sodium chloride solution. The energy-saving evaporative crystallization equipment for the sodium chloride solution comprises a preheating device, an evaporating device, a crystal separating device and a control device. After adoption of the energy-saving evaporative crystallization equipment for the sodium chloride solution, the conventional steam-heating evaporative crystallization way is replaced, a compressor is used for compressing secondary steam separated by an OSLO separator, the compressed secondary steam is used as heating steam, and the own cycle of the equipment is achieved by setting a circuit, so that steam is not generated for heating, condensing equipment is not needed, and a good evaporative crystallization effect can be achieved only by using a small amount of electric energy. Therefore, the energy-saving evaporative crystallization equipment for the sodium chloride solution opens up a new way for reducing the cost, saving the energy and protecting the environment during treatment of the sodium chloride solution, and has the advantages of cleanness, energy conservation, intelligence, automatism, high working efficiency and the like.

A method for the extraction and isolation of the terpene and isoprenoid compounds from plant material, followed by a centrifugal force induced selective crystallization of isoprenoids resulting in a separation of terpene and isoprenoid fractions. This this method is suitable for the extraction of cannabinoids from Cannabis and the enrichment tetrahydrocannabinolic acid and reduction of tetrahydrocannabinol in an extract. The purity of tetrahydrocannabinolic acid resulting from centrifugal crystallization is such that dissolution and selective recrystallization of tetrahydrocannabinolic acid is possible resulting in >99.9% pure tetrahydrocannabinolic acid, w/w.

A process is proposed for crystallizing, by progressively cooling, in multiple stages arranged in series in a crystallization vessel (10), a descending continuous flow of a saturated sucrose solution at a temperature from about 78° to about 120° C., each stage maintaining the sucrose solution being crystallized at a predetermined temperature, until reaching a temperature from about 25 to 40° C., obtaining substantially pure sucrose crystals. A suspension containing sugar seeds is introduced in the crystallizing equipment, in the first stage, jointly with the saturated sucrose solution of 1.05-1.15. In another embodiment of the invention, the saturated solution is fed and its temperature is controlled, already in the first stage of the vessel (10), to obtain a supersaturation between 1.05 and 1.15, inducing the formation of small crystals used as crystallization seeds.

The invention relates to a feedback control method for crystal product granularity in the dilution crystallization process. The method includes the specific steps: estimating the sum of crystal granules according to expected average grain diameter of crystal products, comparing the sum of crystal granules N in crystallization mother liquor measured through an on-line granularity measurement apparatus in real time with the sum of crystal granules Ns specified in production, and synchronously controlling feeding rate of a crystal breaking system, dilution agent and solvent till the crystal products with expected granularity distribution are produced. Compared with the conventional granularity control method in the dilution crystallization process, the method has the advantages that the crystal products with expected granularity distribution can be produced automatically and conveniently as required by only regulating one parameter of the specified sum of crystal granules Ns without re-optimizing new process parameters and the grinding and screening process through plenty of experimental operation, and a granularity controllable regulation function of producing the crystal products with specified granularity distribution as required is realized.

The invention relates to a crystallization tank for traditional Chinese medicine extraction. The crystallization tank comprises a crystallization tank body and a crystal seed generation tank, wherein a tank cover is arranged on the crystallization tank body; a plurality of material addition ports are formed in the tank cover; a motor is arranged above the crystallization tank body and connected with a stirring shaft; a plurality of paddles are arranged on the stirring shaft; a first cooling jacket is arranged around the crystallization tank body; a discharge port is formed in the bottom of the crystallization tank body; a second cooling jacket is arranged around the crystal seed generation tank; a plurality of ultrasonic transducers are uniformly arranged on the outer wall of the second cooling jacket; a feeding port and a conveying port are formed in the top and the bottom of the crystal seed generation tank respectively; the conveying port is connected with a conveying pipeline, and the other end of the conveying pipeline extends into the upper part of the crystallization tank body. With the adoption of the crystallization tank for traditional Chinese medicine extraction, the quantity of added crystal seeds and the granularity can be effectively controlled, the controllability of the crystallization process is improved, the quality of produced traditional Chinese medicine crystals is good, the purity is high, the granularity is uniform, and convenience is brought for the following preparation process.

The invention introduces a discontinuous crystallization unit for the production of ball-shaped crystals comprising a crystallizer (1) that consists of a metallic cylindrical vessel with its inner surface of a hard material, with an oval or circular cross-section with a conical or vaulted bottom (12), fitted along its length with a duplicator (4) for cooling of the solution and/or suspension of the solution and crystals and a high-speed agitator (8) of a hard material with a drive (9) enabling speed control and thus the rate of the impact of the mechanical action of the agitator on roundness of crystals inside the vessel together with the inner surface of the vessel containing at least 2 baffles (5) of a hard material while the vessel is fitted with at least 1 orifice (10) at the top that at least independent branch of the circulation circuit (11) is connected to from the outside for the inlet of a heated solution and/or heated suspension of the solution and crystals by means of at least 1 circulation pump (2) and through at least 1 heat exchanger (3) and together with the duplicator (4) ensuring controlled periodic changes of temperatures of the crystal suspension around the cooling curve while an interconnection (13) pipeline is connected to the bottom (12) of the crystallizer (1) vessel that is connected to at least one branch of the circulation circuit (11).