TH92803A - The process for separation of dialkyls Carbonates are industrialized. - Google Patents

Abstract

DC60 One purpose of this invention is to establish with specific equipment and processes. For the use of a single distillation tower where low-boiling point mixtures with large quantities of dialkyl carbonate and aliphatic monohydric alcohols are produced through the elliptic distillation process. Active By using cyclic carbonate and aliphatic monohydric alcohols as precursors, the continuous infusion of the reactants into a continuous multistage distillation tower where there is a catalyst at Fleshy The same, and the reaction and distillation go together in the distillation tower, in order to separate the mixtures Low boiling point reaction to an elite component. BT distillation tower containing aliphatic monohydric alcohols as The main components of the above and BB distillation end components with dialkyl carbonate. It has been a stable staple of such things for a long time in the industry. Moreover, another purpose has been provided with specialized equipment and processes that are cheap and able to make dialkyl carbonates cheap. Separated by distillation in volumes of, for example, not less than 2 t / h with stability for a long period (ie not less than 1000 hrs, preferably at least 3000 hrs, which is even better. More than 5000 hours), it has been revealed that From the coming out of dialkyl carbonates and diols produced through reactive distillation systems from cyclic carbonate and aliphatic monohydrate. Alcohol, high-purity dimethyl carbonate with a purity of not less than 97% by weight, preferably at least 99% by weight, preferably at least 99.9% by weight. Can be made Acquired at an industrial level of at least 2 t / h, which would be good at at least 3 t / h, which would be even better at not less than 4 t / h, with stable high productivity. A period of not less than 1000 hrs, preferably at least 3000 hrs, better than at least 5000 hrs. One objective of this invention has been established with specific equipment and processes. For the use of a single distillation tower where low-boiling point mixtures with large quantities of dialkyl carbonate and aliphatic monohydric alcohols are produced through the elliptic distillation process. Active By using cyclic carbonate and aliphatic monohydric alcohols as precursors, the continuous infusion of the reactants into a continuous multistage distillation tower where there is a catalyst at Fleshy The same, and the reaction and distillation go together in the distillation tower, in order to separate the mixtures Low boiling point reaction to an elite component. BT distillation tower containing aliphatic monohydric alcohols as The main components of the above and BB distillation end components with dialkyl carbonate. It has been a stable staple of such things for a long time in the industry. Moreover, another purpose has been provided with specialized equipment and processes that are cheap and able to make dialkyl carbonates cheap. Separated by distillation in volumes of, for example, not less than 2 t / h with stability for a long period (ie not less than 1000 hrs, preferably at least 3000 hrs, which is even better. More than 5000 hours), it has been revealed that From the coming out of dialkyl carbonates and diols produced through reactive distillation systems from cyclic carbonate and aliphatic monohydrate. Alcohol, high-purity dimethyl carbonate with a purity of not less than 97% by weight, preferably at least 99% by weight, preferably at least 99.9% by weight. Can be made Acquired at an industrial level of at least 2 t / h, which would be good at no less than 3 t / h, which would be even better at at least 4 t / h, with stable high productivity. It is a long period of not less than 1000 hrs, which is good at not less than 3000 hrs, which is better than at least 5000 hrs.

Claims (2)

Disclaimer (all) which will not appear on the advertisement page. : ------ 08/06/2018 ------ (OCR) Page 1 of 4 pages Disclaimer 1. Industrial process for separation of dialkyl carbone. Which consists of steps of Continuous infusion of the substrate into a continuous multi-stage distillation tower A, where a homogeneous catalyst is present, by means of cyclic carbonate and aliphatic monohydrate. Alcohol as a substrate, reactive distillation in the A distillation tower, the continuous extraction of the high Ab boiling point reaction mixture with diol produced from Bottom section of the distillation tower A As a liquid, continuous extraction of the mixture reacts at the At boiling point with a dialkyl carbonate at Is produced and aliphatic monohydric alcohol from the top part of the A distillation tower. In the form of a gas, the continuous infusion of the mixture reacts to the boiling point of the At Tang into the distillation tower. Several consecutive steps B, and the separation by distillation to the top of the BT tower components. Aliphatic Monohydric alcohol is the main component of the substance and distillate Bb distillation component. There is a dialky carbonate as the main component of the above, where the reconfiguration consists of: a continuous multi-stage distillery B set consists of a distillation tower composed of a It is drawn with length L, (h) and the inner diameter D, (cm) and the inner diameter with the number of steps 1 in it, and the large part with length L2 (cm). .) And the inner diameter D2 (h) and the inner with the number of steps 2 in it, where L? D? For, L2, E 2 and T 2 follow formulas (1) to (8) 500 (symbol) L1 (symbol) 3000 (1) 100 (symbol) D1 (symbol) 1000 (2) 2 ( Symbol) L1 / D1 (Symbol) 30 (3) 10 (Symbol) n1 (Symbol) 40 (4) 700 (Symbol) L2 (Symbol) 5000 (5) 50 (Symbol) D2 (Symbol) 800 (6) 10 ( Symbol) L2 / D2 (symbol) 50 (7), and 35 (symbol) n2 (symbol) 100 (8) page 2 of the number 4 page 2. Process according to Clause 1 whereby the separated quantity of Dialkyl Carbonate It is not less than 2 tons / hr. 3. Process according to claim 1 or 2 where L? E, L, / D? The,, L2, Dj, L2 / D2 and 2 of consecutive multistage distilleries B are in accordance with 800 &lt; L, &lt; 2500, 120 &lt; D, &lt; 800,5 &lt; L, / D, &lt; 20, 13 &lt; T, &lt; 25, 1500 &lt; L2 &lt; 3500, 70 &lt; Tue 2 &lt; 600, 15 &lt; L2 / D2 &lt; 30, 40 &lt; A 2 <70, L, <L2 p 4. By weight to 3. and cm 2 <3 0.9 The cross-sectional area per hole ranges from In its mineral section, m 2 holes 1000 250, where such mineral trays have holes 26 24 process according to any of the claim, clause 2 7. cm 2 4 0.7 1 1 1 1100 200 25 or process according to claim Clause 26. 5 0.5 in its mineral section, 1200 150 The distillation tower is continuously multistage according to Clause 2 5. The trays are trays 23 2 4. Most of the trays are discharged by The inner layer of each of the pulls 22 2 3. The tray container is B, there is a large number of consecutive stages of the distillation tower. Of each part of the extraction section where the inner layer 21 20 continuous multi-stage distillation according to any of Clause 2 2. D1 D2 <_ 40 <_n2 <_70, D2 <_30, 15 <_L2 70 <_D2 <_600, 3500, 1500 <_L2 <_ 13 <_n1 <_25, D1 <_20, 5 <_L1 120 <_D1 <_800, 800 <_L1 <_2500, conforms to n2 D2, L2, D2, L2, n1, D1, L1 L1, where 21. (8) 35 <_n2 <_100 (7), D2 <_50 10 <_L2 (6) 50 <_D2 <_800 (5) 100 <_L2 <_5000 (4) 10 <_n1 < _40 (3) D1 <_30 2 <_L1 (2) 100 <_D1 <_1000 (1) 500 <_L1 <_3000 Following the formula in it, of the inner steps having number (cm) diameter. within Most with length n1, number of layers, the inner layer with the pull-off section with length It consists of: continuous multi-stage distillation tower. From the side of the distillation tower, as a gas, with a diol produced AT, the continuous extraction of the mixture reacts at a low boiling point, a liquid with a diol produced from the lower part of the tower. Distilled in the form of AB mixed with a high boiling point reaction. A continuous pull-out of A, reactive distillation in the distillation tower. It is homogeneous, where the catalyst A continuously enters the substrate into the distillation tower several steps in succession. The addition of aliphatic monohydric alcohol as the substrate, is obtained by using Cyclic carbonates are made in which the mixtures react at low boiling points. Alkyl carbonates are the main components of those that contain BB, distillation end components. Alcohol is the main ingredient of this. With aliphatic monohydric BT produced to be separated by distillation to form the top of the distillation tower Aliphatic monohydric alcohol Containing dialkyl carbons The mixture reacts at a low boiling point. For the introduction of Continuous multi-stage distillation tower that is a continuous multi-stage distillation tower of 20. 0.1% non-metallic monohydric alcohol. Where Aliphha 18 17 dimethyl carbonate in claim 1 9. ppm 1, which contains halogen portions not more than 16 dimethyl carbonate. Carbonates excluded by process in accordance with any of the Clause 1 8. Parts per million 0.1 1 7. Diethyl Carbonate Contains dimethyl carbonate Dylkyl carbonate that is extracted ethanol, contains methanol Aliphatic monohydric alcohol Propylene Carbonate, Contains Ethylene Carbonate Where cyclic carbonate 15 1 6. The aforementioned aldi is recycled as a precursor for the production of distilled dialkyl carbonate, where the tower top 14 1 component 5. By weight of distillation components such as 100%, the basis of by weight on such 99.9% is not less than Carbonate in distillation tower tip components Where dialkyl concentrations 13 1 4. By weight on a 99% basis 12 13. 97% 11 1 2. As such, there was a return distillation ratio in the consecutive period where the distillation tower was at several stages. SECTION 10 1 1. ํ C there is a distillation temperature range from 9 1 0. In the mineral section 8 6 9. Its mineral, in 7. 8. Of there is a mineral. 7. 6. Such a tray Several steps in succession Most of them have distillation towers. Where the inner layer of the extraction section 5. Contain the extraction section where the inner layer of each section L1 <_L2 1500 <_L2 <_3500, 2 hrs less, with the produced quantity of dialkyl Carbonate is not 2. That, in the inner layer with a number of steps, is such a length consisting of a distillation tower containing a pull-out part that The distillation tower has several consecutive stages. Where improvements containing: carbonates are the main components of the above, containing dialkyls The separation by distillation into the top of the distillation element B, then into the distillation tower. Continuous infusion of mixtures reacts at low boiling points. As mentioned in gas form, it is produced from the top of the distillation tower. Containing dialkyl carbons that As a liquid, the bottom part of the distillation tower With diols that are produced from The continuous extraction of the mixture has such a high boiling point reaction, alcohol as a substrate, aliphatic monohydric. The homogeneous catalyst is based on cyclic carbonate where the reactants are continuously injected into the distillation tower in succession several steps. With the industrial process assembly process for the separation of dialkyl carbonate 1. ------------ the cross-sectional area per hole is in the range from that. With holes in which the mineral tray A continuous multi-stage distillation tower according to any of the clauses Multistage distillation tower in succession according to Clause Hr. 2, four containment of extraction section Where the inner layer of each part, 70, 2 40 30, 600, 70 1500 <Nu 13 <T, <25, Y, <20, 120 <W, <800,5 800 < Nu <2500, and 2Th ,, Wah ,, Nu, 100 (8) 35W2 <50 (a), 10 <800 (6) <02 50 5000 (5) 700Th 1 <40 (4). 1 <30 (3) 2 <1000 (2) 100 3000 (1) 500 th 1, D? L? The second in it, of the layer is the inner diameter. The 1 is in it, and The number of layers is (H) D, L, the face of that number of distillation towers, in gas form, from the top part of At the continuous extraction of the mixture, the boiling point reaction, the Ab section of the mixture, the boiling point reaction. high Continuous pull-out Active distillation in the A distillation tower, a homogeneous reaction, where there is a catalyst. The continuous infusion of the substance into the distillation tower several steps continuously. Aliphatic monohydric alcohols as a base substance, are obtained by cyclic carbonate. The residue of the mixture reacts to the eye boiling point. With dialkyl carbonate as the main component of it Distillation distillation element Bb Monohydric alcohol is the main ingredient thereof. Aliphatic The alcohol is separated by distillation into a component at the top of the Bt distillation tower. Containing dialkyl carbonate and aliphatic monohydric Mixing reaction, boiling point. Contains a greater amount of halogens by mass, with more aliphatic monohydric alcohols. The maker produces high purity dialkyl carbons. The range contains halogen content that is not greater than At the production of dialkyl carbonate Process according to any clause clause clause Which contains no more than halogen content The brewers produce dialkyl carbonate ethanol, and the cyclic carbonate diol is recycled as a base for production. Of dialkyl carbonate Bt distillation tower, where the elite components Process according to any clause of the clause By the mass of the components at the end of the distillation tower By mass on the basis Carbonate in Bb distillation tower tip components Process according to which clause. By mass on the basis of Such is not? Carbonate in BB distillation tower end components The distillation ratio ranges from degrees Celsius, and the distillation end temperature ranges from Where the said mineral tray has a hole Of things said Where the said tray is a mineral tray Tang said is a tray. Where the inner step of the pull-out part Where the inner step of each part of A 2>