Production line for biphenyl amylene fine chemicals

Abstract

The utility model relates to a production line for biphenyl amylene fine chemicals. An intermediate propyl cyclohexyl biphenyl formaldehyde production line, an intermediate propyl cyclohexyl biphenyl acrolein dimethyl acetal production line, a propyl cyclohexyl biphenyl propionaldehyde dimethyl acetal toluene solution production line, a propyl cyclohexyl biphenyl propionaldehyde toluene solution production line and a propyl cyclohexyl biphenyl pentene cis-trans mixture production line are adopted; the trans-propyl cyclohexyl biphenyl pentene production line and the trans-propyl cyclohexyl biphenyl pentene finished product production line are sequentially connected, and finally the trans-propyl cyclohexyl biphenyl pentene finished product is prepared through concentration of the multi-stage reaction kettle, crystallization of the crystallization kettle, filter pressing of the filter press and drying of the dryer. The production line has the functions of high efficiency and recycling, has better cost control and production efficiency, and is suitable for industrial mass production.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fine chemical industry production line, specifically to a biphenyl pentene fine chemical production line. BACKGROUND

[0002] Biphenyl pentene compound has wide application in liquid crystal display technology, can promote the performance of liquid crystal composition, significantly improves the response speed and afterimage recovery ability of liquid crystal display, thereby promotes the overall display effect and user experience. However, due to its own and subsequent intermediates in synthesis and industrialization high cost and purification difficulty, so at present industrialized production company complete production line is less, thereby leading to the cost of industrialized production biphenyl pentene fine chemical is high. SUMMARY

[0003] The utility model provides a biphenyl pentene fine chemical production line with cost control, high purification and complete production line chain.

[0004] The technical scheme adopted by the utility model is: a biphenyl pentene fine chemical production line, characterized by: including intermediate propylcyclohexyl biphenyl formaldehyde production line, intermediate propylcyclohexyl biphenyl propenyl aldehyde dimethyl alcohol production line, propylcyclohexyl biphenyl propyl aldehyde dimethyl alcohol toluene solution production line, propylcyclohexyl biphenyl propyl aldehyde toluene solution production line, propylcyclohexyl biphenyl pentene cis-trans mixture production line, trans propylcyclohexyl biphenyl pentene finished product production line;

[0005] The intermediate propylcyclohexyl biphenyl formaldehyde production line includes a first reaction kettle, a propylcyclohexyl benzene boric acid storage tank, a p-chlorobenzaldehyde storage tank, a 2-methyltetrahydrofuran storage tank, a potassium phosphate storage tank, a tricyclohexylphosphine nickel dichloride storage tank, a tap water pipe feeding into the first reaction kettle, a first reaction kettle upper layer discharge connected to a first concentration crystallization kettle, a first concentration crystallization kettle connected to an isopropyl acetate storage tank feeding, a first concentration crystallization kettle discharge connected to a first filter press, a first filter press discharge connected to a first dryer, and a first dryer discharge connected to a propylcyclohexyl biphenyl formaldehyde storage tank.

[0006] The intermediate propylcyclohexyl biphenyl propenyl aldehyde dimethyl alcohol production line includes a second reaction kettle, the second reaction kettle is provided with a concentration jacket or a concentration coil, an intermediate propylcyclohexyl biphenyl formaldehyde storage tank, a bromoacetaldehyde dimethyl alcohol triphenyl phosphonium salt storage tank, a tetrahydrofuran storage tank, a potassium tert-butoxide storage tank, a tap water pipe, a sodium chloride brine storage tank, and a petroleum ether storage tank feeding into the second reaction kettle, a second reaction kettle discharge connected to a second filter press, a second filter press liquid outlet connected to a second concentration crystallization kettle, a second concentration crystallization kettle upper connected to an ethyl acetate storage tank feeding, a second concentration crystallization kettle discharge connected to a third filter press, a third filter press discharge connected to a second dryer, and a second dryer discharge connected to a propylcyclohexyl biphenyl propenyl aldehyde dimethyl alcohol storage tank.

[0007] The propylcyclohexylbiphenylpropionaldehyde dimethyl acetal toluene solution production line includes a third reactor, a propylcyclohexylbiphenylpropionaldehyde dimethyl acetal storage tank, a toluene storage tank, a palladium on carbon storage tank, and a hydrogen storage tank, which are fed into the third reactor. The discharge from the third reactor is connected to a fourth filter, and the liquid outlet from the fourth filter is connected to the propylcyclohexylbiphenylpropionaldehyde dimethyl acetal toluene solution storage tank.

[0008] The propylcyclohexylbiphenylpropionaldehyde toluene solution production line includes a fourth reactor, a propylcyclohexylbiphenylpropionaldehyde dimethyl alcohol toluene solution storage tank, a 15% hydrochloric acid storage tank, and a tap water pipe feed into the fourth reactor. The upper layer of the fourth reactor discharges into the first concentration reactor.

[0009] The propylcyclohexylbiphenylpentene cis-trans mixture production line includes a fifth reactor equipped with a concentration jacket or concentration coil. The feed from the first concentration reactor, the iodoethane triphenylphosphine salt storage tank, the tetrahydrofuran storage tank, the potassium tert-butoxide storage tank, the tap water pipe, the sodium chloride brine storage tank, and the petroleum ether storage tank is connected to the fifth reactor. The discharge from the fifth reactor is connected to the fifth filter press. The discharge from the fifth filter press is connected to the second concentration reactor. The second concentration reactor is fed by a methanol storage tank. The discharge from the second concentration reactor is connected to the sixth filter press. The discharge from the sixth filter press is connected to the third dryer. The discharge from the third dryer is connected to the propylcyclohexylbiphenylpentene cis-trans mixture storage tank.

[0010] The trans-propylcyclohexylbiphenylpentene product production line includes a sixth reactor equipped with a concentration jacket or concentration coil. The feed tanks for the trans-propylcyclohexylbiphenylpentene mixture, azobisisobutyronitrile (AIBN), diphenyl disulfide, toluene, tap water, and petroleum ether are connected to the sixth reactor. The discharge from the sixth reactor is connected to an alumina decolorization chromatography column. The discharge from the chromatography column is connected to a third concentration and crystallization reactor. The feed tanks for the third concentration and crystallization reactor are connected to petroleum ether and ethanol. The discharge from the third concentration and crystallization reactor is connected to a seventh filter press. The discharge from the seventh filter press is connected to a fourth dryer. The discharge from the fourth dryer is connected to the trans-propylcyclohexylbiphenylpentene product storage tank.

[0011] Furthermore, the dryer is a double-cone dryer.

[0012] Furthermore, the wastewater from the lower part of the first reactor is connected to a wastewater treatment pond, the wastewater from the lower part of the second reactor is connected to a wastewater treatment pond, the wastewater from the lower part of the fourth reactor is connected to a wastewater treatment pond, the wastewater from the lower part of the fifth reactor is connected to a wastewater treatment pond, and the wastewater from the lower part of the sixth reactor is connected to a wastewater treatment pond.

[0013] Furthermore, the first concentration crystallization kettle is heated under reduced pressure to concentrate and recover 2-methyltetrahydrofuran from the 2-methyltetrahydrofuran storage tank.

[0014] Furthermore, the second reactor is heated under reduced pressure to concentrate and recover tetrahydrofuran, which is then connected to a storage tank.

[0015] Further, the second concentration crystallization kettle is connected with a petroleum ether storage tank through a reduced pressure heating and concentration recovery.

[0016] Further, the fifth reaction kettle is connected with a tetrahydrofuran and toluene mixed storage tank through a reduced pressure heating and concentration recovery.

[0017] Further, the sixth reaction kettle is connected with a toluene storage tank through a reduced pressure heating and concentration recovery.

[0018] Further, the third concentration crystallization kettle is connected with a petroleum ether storage tank through a reduced pressure heating and concentration recovery.

[0019] In the production of the production line, firstly, the intermediate propyl cyclohexyl biphenyl benzaldehyde is prepared, then the intermediate propyl cyclohexyl biphenyl propenyl glyoxal dimethyl acetal is prepared through the intermediate propyl cyclohexyl biphenyl benzaldehyde, then the propyl cyclohexyl biphenyl propyl glyoxal dimethyl acetal toluene solution is prepared through the intermediate propyl cyclohexyl biphenyl propenyl glyoxal dimethyl acetal, the propyl cyclohexyl biphenyl propyl glyoxal toluene solution is prepared through the propyl cyclohexyl biphenyl propyl glyoxal dimethyl acetal toluene solution, the propyl cyclohexyl biphenyl pentene cis-trans mixture is prepared through the propyl cyclohexyl biphenyl propyl glyoxal toluene solution, and finally the trans propyl cyclohexyl biphenyl pentene finished product is prepared through the propyl cyclohexyl biphenyl pentene cis-trans mixture. The whole production line completes the preparation of the intermediate, the intermediate solution and the cis-trans mixture, and finally completes the production of the trans propyl cyclohexyl biphenyl pentene finished product. The production line has the functions of high efficiency and recycling and reuse, has good cost control and production efficiency, and is suitable for industrial mass production. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an intermediate propyl cyclohexyl biphenyl benzaldehyde production line structure schematic diagram in the utility model;

[0021] Figure 2 It is an intermediate propyl cyclohexyl biphenyl propenyl glyoxal dimethyl acetal production line structure schematic diagram in the utility model;

[0022] Figure 3 It is a propyl cyclohexyl biphenyl propyl glyoxal dimethyl acetal toluene solution production line structure schematic diagram in the utility model;

[0023] Figure 4 It is a propyl cyclohexyl biphenyl propyl glyoxal toluene solution production line structure schematic diagram in the utility model;

[0024] Figure 5 It is a propyl cyclohexyl biphenyl pentene cis-trans mixture production line structure schematic diagram in the utility model;

[0025] Figure 6 It is a trans propyl cyclohexyl biphenyl pentene finished product production line structure schematic diagram in the utility model.

[0026] Figure: the first reactor 1, propyl cyclohexyl phenyl boronic acid storage tank 2, p-chlorobenzaldehyde storage tank 3, 2-methyl tetrahydrofuran storage tank 4, potassium phosphate storage tank 5, tricyclohexylphosphine nickel dichloride storage tank 6, tap water pipe 7, wastewater treatment tank 8, the first concentrated crystallization kettle 9, isopropyl acetate storage tank 10, the first filter press 11, the first dryer 12, propyl cyclohexyl biphenyl formaldehyde storage tank 13, the second reactor 14, potassium tert-butyl alcohol storage tank 15, sodium chloride brine storage tank 16, petroleum ether storage tank 17, the second filter press 18, the second concentrated crystallization kettle 19, ethyl acetate storage tank 20, the third filter press 21, the second dryer 22, propyl cyclohexyl biphenyl propenyl aldehyde dimethyl ketal storage tank 23, the third reactor 24, methanol storage tank 25, toluene storage tank 26, palladium carbon storage tank 27, hydrogen storage tank 28, the fourth filter 29, propyl cyclohexyl biphenyl propenyl aldehyde dimethyl ketal toluene solution storage tank 30, the fourth reactor 31, 15% hydrochloric acid storage tank 32, the first concentration kettle 33, the fifth reactor 34, iodine ethane triphenyl phosphine salt storage tank 35, tetrahydrofuran storage tank 36, the fifth filter press 37, the second concentration kettle 38, the sixth filter press 39, the third dryer 40, propyl cyclohexyl biphenyl pentene cis-trans mixture storage tank 41, the sixth reactor 42, azobis isobutyronitrile storage tank 43, diphenyl disulfide storage tank 44, chromatographic column 45, the third concentrated crystallization kettle 46, the seventh filter press 47, the fourth dryer 48, trans-propyl cyclohexyl biphenyl pentene product storage tank 49, bromo acetaldehyde dimethyl ketal triphenyl phosphonium salt storage tank 50, tetrahydrofuran storage tank 51, ethanol storage tank 52. DETAILED DESCRIPTION

[0027] The utility model is further explained below in connection with the drawings and examples.

[0028] Figures 1-6 As shown: a biphenyl pentene fine chemicals production line, including intermediate propyl cyclohexyl biphenyl formaldehyde production line, intermediate propyl cyclohexyl biphenyl propenyl aldehyde dimethyl ketal production line, propyl cyclohexyl biphenyl propenyl aldehyde dimethyl ketal toluene solution production line, propyl cyclohexyl biphenyl propenyl aldehyde toluene solution production line, propyl cyclohexyl biphenyl pentene cis-trans mixture production line, trans-propyl cyclohexyl biphenyl pentene product production line.

[0029] Figure 1 Middle: intermediate propyl cyclohexyl biphenyl formaldehyde production line adopts propyl cyclohexyl phenyl boronic acid storage tank 2, p-chlorobenzaldehyde storage tank 3, 2-methyl tetrahydrofuran storage tank 4, potassium phosphate storage tank 5, tricyclohexylphosphine nickel dichloride storage tank 6, tap water pipe 7 feeds into the first reactor 1, the first reactor 1 upper layer is connected to send the first concentrated crystallization kettle 9, the first concentrated crystallization kettle 9 is connected to isopropyl acetate storage tank 10 feed, the first concentrated crystallization kettle 9 is connected to the first filter press 11, the first filter press 11 is connected to the first dryer 12, the first dryer 12 is connected to propyl cyclohexyl biphenyl formaldehyde storage tank 13.

[0030] Figure 2 The second reaction kettle 14 is used for the production of the intermediate propylcyclohexyl biphenyl propyl aldehyde dimethyl acetal, the second reaction kettle is provided with a concentration jacket or a concentration coil, the intermediate propylcyclohexyl biphenyl propyl aldehyde dimethyl acetal storage tank 13, the bromoacetaldehyde dimethyl acetal triphenyl phosphonium salt storage tank 50, the tetrahydrofuran storage tank 51, the potassium tert-butoxide storage tank 15, the tap water pipe 7, the sodium chloride brine storage tank 16, and the petroleum ether storage tank 17 are fed into the second reaction kettle 14, the second reaction kettle 14 is connected to the second filter press 18, the second filter press 18 is connected to the second concentration crystallization kettle 19, the second concentration crystallization kettle 19 is connected to the ethyl acetate storage tank 20, the second concentration crystallization kettle 19 is connected to the third filter press 21, the third filter press 21 is connected to the second dryer 22, and the second dryer 22 is connected to the propylcyclohexyl biphenyl propyl aldehyde dimethyl acetal storage tank 23.

[0031] Figure 3 The third reaction kettle 24 is used for the production of the propylcyclohexyl biphenyl propyl aldehyde dimethyl acetal toluene solution, the third reaction kettle is provided with a concentration jacket or a concentration coil, the propylcyclohexyl biphenyl propyl aldehyde dimethyl acetal storage tank 23, the toluene storage tank 26, and the palladium-carbon storage tank 27 are fed into the third reaction kettle 24, the third reaction kettle 24 is connected to the fourth filter 29, and the fourth filter 29 is connected to the propylcyclohexyl biphenyl propyl aldehyde dimethyl acetal toluene solution storage tank 30.

[0032] Figure 4 The fourth reaction kettle 31 is used for the production of the propylcyclohexyl biphenyl propyl aldehyde toluene solution, the fourth reaction kettle is provided with a concentration jacket or a concentration coil, the propylcyclohexyl biphenyl propyl aldehyde dimethyl acetal toluene solution storage tank 30 and the 15% hydrochloric acid storage tank 32 are fed into the fourth reaction kettle 31, and the fourth reaction kettle 31 is connected to the first concentration kettle 33.

[0033] Figure 5 The fifth reaction kettle 34 is used for the production of the propylcyclohexyl biphenyl pentene cis-trans mixture, the fifth reaction kettle is provided with a concentration jacket or a concentration coil, the first concentration kettle 33, the iodoethane triphenyl phosphonium salt storage tank 35, the tetrahydrofuran storage tank 36, the potassium tert-butoxide storage tank 15, the tap water pipe 7, the sodium chloride brine storage tank 16, and the petroleum ether storage tank 17 are fed into the fifth reaction kettle 34, the fifth reaction kettle 34 is connected to the fifth filter press 37, the fifth filter press 37 is connected to the second concentration kettle 38, the second concentration kettle 38 is connected to the methanol storage tank 25, the second concentration kettle 38 is connected to the sixth filter press 39, the sixth filter press 39 is connected to the third dryer 40, and the third dryer 40 is connected to the propylcyclohexyl biphenyl pentene cis-trans mixture storage tank 41.

[0034] Figure 6The trans-propylcyclohexyl biphenyl pentene product production line adopts the sixth reaction kettle 42, the sixth reaction kettle is provided with a concentration jacket or a concentration coil, the propylcyclohexyl biphenyl pentene cis-trans mixture storage tank 41, the azobisisobutyronitrile storage tank 43, the diphenyl disulfide storage tank 44, the toluene storage tank 26, the tap water pipe 7 and the petroleum ether storage tank 17 are connected to the sixth reaction kettle 42, the sixth reaction kettle 42 is connected to the alumina decoloring chromatographic column 45, the chromatographic column 45 is connected to the third concentration crystallization kettle 46, the third concentration crystallization kettle 46 is connected to the petroleum ether storage tank 17 and the ethanol storage tank 52, the third concentration crystallization kettle 46 is connected to the seventh filter press 47, the seventh filter press 47 is connected to the fourth dryer 48, and the fourth dryer 48 is connected to the trans-propylcyclohexyl biphenyl pentene product storage tank 49.

[0035] In the embodiment, the wastewater discharged from the lower parts of the first, second, fourth, fifth and sixth reaction kettles is connected to the wastewater treatment tank 8.

[0036] On the basis of the embodiment, the dryer is preferably a double-cone dryer.

[0037] On the basis of the embodiment, the first concentration crystallization kettle is connected to the 2-methyltetrahydrofuran storage tank for recovery of the 2-methyltetrahydrofuran concentrated and recovered under reduced pressure.

[0038] On the basis of the embodiment, the second reaction kettle is connected to the tetrahydrofuran storage tank for recovery of the tetrahydrofuran concentrated and recovered under reduced pressure.

[0039] On the basis of the embodiment, the second concentration crystallization kettle is connected to the petroleum ether storage tank for recovery of the petroleum ether concentrated and recovered under reduced pressure.

[0040] On the basis of the embodiment, the fifth reaction kettle is connected to the tetrahydrofuran and toluene mixed storage tank for recovery of the tetrahydrofuran and toluene concentrated and recovered under reduced pressure.

[0041] On the basis of the embodiment, the second concentration crystallization kettle is connected to the petroleum ether storage tank for recovery of the petroleum ether concentrated and recovered under reduced pressure.

[0042] On the basis of the embodiment, the sixth reaction kettle is connected to the toluene storage tank for recovery of the toluene concentrated and recovered under reduced pressure.

[0043] On the basis of the embodiment, the third concentration crystallization kettle is connected to the petroleum ether storage tank for recovery of the petroleum ether concentrated and recovered under reduced pressure.

[0044] In the production line, first, propyl cyclohexyl phenyl boric acid, p-chlorobenzaldehyde, 2-methyl tetrahydrofuran, potassium phosphate storage tank, tricyclohexylphosphine nickel dichloride are fed into the first reaction kettle to obtain propyl cyclohexyl biphenyl aldehyde by coupling; then water is fed into the water pipe to wash, the lower waste water is neutralized and then fed into the waste water treatment tank, the upper layer is 2-methyl tetrahydrofuran solution of propyl cyclohexyl biphenyl aldehyde, the upper layer is sent to the first concentration crystallization kettle to concentrate under reduced pressure, 2-methyl tetrahydrofuran is recovered for reuse, isopropyl acetate is added to crystallize, impurities such as p-chlorobenzaldehyde, benzaldehyde, propyl cyclohexyl phenol, propyl cyclohexyl benzene dimer are removed, the first concentration crystallization kettle is sent to the first filter press to filter, propyl cyclohexyl biphenyl aldehyde solid product is obtained, the first filter press is sent to the first dryer to dry, and the intermediate propyl cyclohexyl biphenyl aldehyde is collected in the storage tank.

[0045] Then, bromoacetaldehyde dimethyl acetal triphenyl phosphonium salt and tetrahydrofuran are fed into the second reaction kettle, potassium tert-butoxide is added to obtain bromoacetaldehyde dimethyl acetal triphenyl phosphonium ylide, the intermediate propyl cyclohexyl biphenyl aldehyde is added dropwise to configure tetrahydrofuran solution, then water is fed into the water pipe to hydrolyze, bromoacetaldehyde dimethyl acetal triphenyl phosphonium ylide is used in excess, the excess part is destroyed by hydrolysis, the lower layer is neutralized and then fed into the waste water treatment tank, the upper layer is 2-methyl tetrahydrofuran solution of propyl cyclohexyl biphenyl propenyl aldehyde dimethyl acetal; then sodium chloride brine is washed, the lower layer is neutralized and then fed into the waste water treatment tank, the upper layer is 2-methyl tetrahydrofuran solution of propyl cyclohexyl biphenyl propenyl aldehyde dimethyl acetal, the second reaction kettle is heated under reduced pressure to concentrate, tetrahydrofuran is recovered for reuse, petroleum ether is added to extract in the second reaction kettle, the product is separated from triphenyl phosphine oxide and potassium bromide; then the second filter press is used to filter, the second concentration crystallization kettle is used to concentrate under reduced pressure to recover petroleum ether for reuse, ethyl acetate is added to crystallize, propyl cyclohexyl biphenyl aldehyde, triphenyl phosphine oxide and triphenyl phosphine impurities are removed, finally, the third filter press is used to filter, the third dryer is used to dry, and the intermediate propyl cyclohexyl biphenyl propenyl aldehyde dimethyl acetal is collected in the storage tank.

[0046] Then, propyl cyclohexyl biphenyl propenyl aldehyde dimethyl acetal, toluene and palladium carbon catalyst are fed into the third reaction kettle, hydrogen is fed into the third reaction kettle to hydrogenate, the catalyst is filtered out by the fourth filter, and the filtrate is collected in the storage tank.

[0047] Then, propyl cyclohexyl biphenyl propenyl aldehyde dimethyl acetal, toluene and palladium carbon catalyst are fed into the third reaction kettle, hydrogen is fed into the third reaction kettle to hydrogenate, the catalyst is filtered out by the fourth filter, and the filtrate is collected in the storage tank.

[0048] The iodine ethane triphenyl phosphonium salt, tetrahydrofuran, potassium tert-butoxide, propyl cyclohexyl biphenyl propyl aldehyde toluene solution, tap water, excess iodine ethane triphenyl phosphonium ylide, excess portion destroyed by hydrolysis, neutralization of the lower layer, waste water treatment tank, the upper layer is propyl cyclohexyl biphenyl pentene cis-trans mixture tetrahydrofuran solution, sodium chloride brine, neutralization of the lower layer, waste water treatment tank, the upper layer is propyl cyclohexyl biphenyl pentene tetrahydrofuran solution, the fifth reactor is concentrated under reduced pressure, recovery of tetrahydrofuran, toluene, etc. are used, petroleum ether is introduced, the product is separated from triphenyl phosphine oxide, etc., and is sent to the fifth filter press, the second concentration kettle is concentrated under reduced pressure, petroleum ether is recovered, methanol is introduced, triphenyl phosphine oxide is removed, and solid product propyl cyclohexyl biphenyl pentene cis-trans mixture is obtained, which is then sent to the sixth filter press, the solid product propyl cyclohexyl biphenyl pentene cis-trans mixture is dried in the third dryer, and the propyl cyclohexyl biphenyl pentene cis-trans mixture is collected in the storage tank.

[0049] Finally, the sixth reactor is fed with propyl cyclohexyl biphenyl pentene cis-trans mixture, azobisisobutyronitrile, diphenyl disulfide, toluene, and isomerization is performed to convert most of the cis material in the propyl cyclohexyl biphenyl pentene cis-trans mixture into trans structure material, tap water is introduced, the lower layer is sent to the waste water treatment tank, the upper layer is trans propyl cyclohexyl biphenyl pentene toluene solution, the sixth reactor is concentrated under reduced pressure, toluene is recovered and used, petroleum ether is introduced, the third concentration crystallization kettle is concentrated under reduced pressure, petroleum ether is recovered and used, petroleum ether and ethanol are introduced, the seventh filter press is used for pressure filtration, and the fourth dryer is used for drying to obtain trans propyl cyclohexyl biphenyl pentene finished product.

[0050] In this embodiment, the operations of concentration under reduced pressure, crystallization, recovery, belt pump valve control, water washing, etc. are all conventional techniques in chemical industry production.

Claims

1. A biphenylpentene fine chemicals production line, characterized by: The intermediate propylcyclohexyl biphenyl aldehyde production line, the intermediate propylcyclohexyl biphenyl propenyl aldehyde dimethyl ketal production line, the propylcyclohexyl biphenyl propenyl aldehyde dimethyl ketal toluene solution production line, the propylcyclohexyl biphenyl propenyl aldehyde toluene solution production line, the propylcyclohexyl biphenyl pentene cis-trans mixture production line, and the trans propylcyclohexyl biphenyl pentene finished product production line. The intermediate propylcyclohexyl biphenyl aldehyde production line comprises a first reaction kettle, a propylcyclohexyl phenyl boronic acid storage tank, a p-chlorobenzaldehyde storage tank, a 2-methyl tetrahydrofuran storage tank, a potassium phosphate storage tank, a tricyclohexyl phosphine nickel dichloride storage tank, a tap water pipe feeding the first reaction kettle, the upper layer of the first reaction kettle discharging a first concentration crystallization kettle, the first concentration crystallization kettle feeding an isopropyl acetate storage tank, the first concentration crystallization kettle discharging a first filter press, the first filter press discharging a first dryer, and the first dryer discharging a propylcyclohexyl biphenyl aldehyde storage tank. The intermediate propylcyclohexyl biphenyl propenyl aldehyde dimethyl ketal production line comprises a second reaction kettle, the second reaction kettle being provided with a concentration jacket or a concentration coil, an intermediate propylcyclohexyl biphenyl aldehyde storage tank, a bromoacetaldehyde dimethyl ketal triphenyl phosphonium salt storage tank, a tetrahydrofuran storage tank, a potassium tert-butoxide storage tank, a tap water pipe, a sodium chloride brine storage tank, and a petroleum ether storage tank feeding the second reaction kettle, the second reaction kettle discharging a second filter press, the second filter press discharging a second concentration crystallization kettle, the second concentration crystallization kettle feeding an ethyl acetate storage tank, the second concentration crystallization kettle discharging a third filter press, the third filter press discharging a second dryer, and the second dryer discharging a propylcyclohexyl biphenyl propenyl aldehyde dimethyl ketal storage tank. The propylcyclohexyl biphenyl propenyl aldehyde dimethyl ketal toluene solution production line comprises a third reaction kettle, a propylcyclohexyl biphenyl propenyl aldehyde dimethyl ketal storage tank, a toluene storage tank, a palladium-carbon storage tank, and a hydrogen storage tank feeding the third reaction kettle, the third reaction kettle discharging a fourth filter, the fourth filter discharging a propylcyclohexyl biphenyl propenyl aldehyde dimethyl ketal toluene solution storage tank. The propylcyclohexyl biphenyl propenyl aldehyde toluene solution production line comprises a fourth reaction kettle, a propylcyclohexyl biphenyl propenyl aldehyde dimethyl ketal toluene solution storage tank, a 15% hydrochloric acid storage tank, and a tap water pipe feeding the fourth reaction kettle, the upper layer of the fourth reaction kettle discharging a first concentration kettle. The propylcyclohexyl biphenyl pentene cis-trans mixture production line comprises a fifth reaction kettle, the fifth reaction kettle being provided with a concentration jacket or a concentration coil, a first concentration kettle, an iodine ethane triphenyl phosphonium salt storage tank, a tetrahydrofuran storage tank, a potassium tert-butoxide storage tank, a tap water pipe, a sodium chloride brine storage tank, and a petroleum ether storage tank feeding the fifth reaction kettle, the fifth reaction kettle discharging a fifth filter press, the fifth filter press discharging a second concentration kettle, the second concentration kettle feeding a methanol storage tank, the second concentration kettle discharging a sixth filter press, the sixth filter press discharging a third dryer, and the third dryer discharging a propylcyclohexyl biphenyl pentene cis-trans mixture storage tank. The trans-propylcyclohexyl biphenyl pentene finished product production line comprises a sixth reaction kettle, the sixth reaction kettle is provided with a concentration jacket or a concentration coil, a propylcyclohexyl biphenyl pentene cis-trans mixture storage tank, an azobisisobutyronitrile storage tank, a diphenyl disulfide storage tank, a toluene storage tank, a tap water pipe, a petroleum ether storage tank, a sixth reaction kettle, a sixth reaction kettle, an alumina decoloring chromatographic column, a third concentration crystallization kettle, a third concentration crystallization kettle, a petroleum ether storage tank and an ethanol storage tank, a seventh filter press, a fourth dryer, and a trans-propylcyclohexyl biphenyl pentene finished product storage tank.

2. A diphenylpentene fine chemicals production line according to claim 1, characterized by: The dryer is a double-cone dryer.

3. A diphenylpentene fine chemicals production line according to claim 1, characterized by: The first reaction kettle is connected to a wastewater treatment tank through the wastewater discharged from the lower part of the second reaction kettle, the fourth reaction kettle, the fifth reaction kettle and the sixth reaction kettle.

4. A diphenylpentene fine chemicals production line according to claim 1, characterized by: The first concentration crystallization kettle is connected to a 2-methyltetrahydrofuran storage tank through the recovery of vacuum heating and concentration.

5. A diphenyl pentene fine chemicals production line as claimed in claim 1, wherein: The second reaction kettle is connected to a tetrahydrofuran storage tank through the recovery of vacuum heating and concentration.

6. A diphenylpentene fine chemicals production line as claimed in claim 1, characterized by: The second concentration crystallization kettle is connected to a petroleum ether storage tank through the recovery of vacuum heating and concentration.

7. A diphenyl pentene fine chemicals production line as claimed in claim 1, wherein: The fifth reaction kettle is connected to a tetrahydrofuran and toluene mixed storage tank through the recovery of vacuum heating and concentration.

8. A diphenylpentene fine chemicals production line as claimed in claim 1, characterized by: The sixth reaction kettle is connected to a toluene storage tank through the recovery of vacuum heating and concentration.

9. A diphenylpentene fine chemicals production line as claimed in claim 1, characterized in that: The third concentration crystallization kettle is connected to a petroleum ether storage tank through the recovery of vacuum heating and concentration.

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