Method of obtaining, at least, one product of partial oxidation and/or ammoxidising of propylene

FIELD: chemistry.

SUBSTANCE: present invention pertains to perfection of the method of obtaining at least, one product of partial oxidation and/or ammoxidising of propylene, chosen from a group, comprising propylene oxide, acrolein, acrylic acid and acrylonitrile. The starting material is raw propane. a) At the first stage, raw propane, in the presence and/or absence of oxygen, is subjected to homogenous and/or heterogeneous catalysed dehydrogenation and/or oxydehydrogenation. Gas mixture 1, containing propane and propylene is obtained. b) If necessary, a certain quantity of the other components in gas mixture 1, obtained in the first stage, besides propane and propylene, such as hydrogen and carbon monoxide is separated and/or converted to other compounds, such as water and carbon dioxide. From gas mixture 1, gas mixture 1' is obtained, containing propane and propylene, as well as other compounds, besides oxygen, propane and propylene. c) At the third stage, gas mixture 1 and/or gas mixture 1' as a component, containing molecular oxygen, of gas mixture 2, is subjected to heterogeneous catalysed partial gas-phase oxidation and/or propylene, contained in gas mixture 1 and/or gas mixture 1', undergoes partial gas-phase ammoxidising. Content of butane-1 in gas mixture 2 is ≤1 vol.%. The method increases output of desired products and efficiency of the process.

EFFECT: increased output of desired products and efficiency of the process.

72 cl, 10 ex

 

The text descriptions are given in facsimile form.

1. The method of obtaining at least one product of partial oxidation and/or amoxiline propylene selected from the group comprising propylene oxide, acrolein, acrylic acid and Acrylonitrile, the original substance of which is crude propane, in which

a) at the first stage, the crude propane in the presence and/or absence of oxygen is subjected to a homogeneous and/or heterogeneous-catalyzed dehydration and/or oxidisation, and get containing propane and propylene gas mixture 1, and

b) from those obtained in the first stage of the gas mixture 1, contained therein, other than propane and propylene components, such as hydrogen, carbon monoxide, if necessary, to separate a certain amount and/or convert it into other compounds such as water, carbon dioxide, and the gas mixture 1 receive the gas mixture 1'containing propane and propylene, and other than oxygen, propane and propylene compounds, and at least one stage

C) the gas mixture 1 and/or gas mixture 1' as a component containing molecular oxygen, the gas mixture 2 is subjected to a heterogeneously-catalyzed gas-phase partial oxidation and/or partial gas-phase Immokalee contained in the gas mixture 1 and/or in the gas mixture 1' propylene,

characterized in that the content of butene-1 in the gas mixture 2 is ≤1%vol.

2. The method according to claim 1, characterized in that the content of butene-1 in the gas mixture 2 is ≤0,75%vol.

3. The method according to claim 1, characterized in that the content of butene-1 in the gas mixture 2 is ≤0,5%vol.

4. The method according to claim 1, characterized in that the content of butene-1 in the gas mixture 2 is ≤0,3%vol.

5. The method according to claim 1, characterized in that the content of butene-1 in the gas mixture 2 is ≤0,1%vol.

6. The method according to claim 1, characterized in that the content of butene-1 in the gas mixture 2 is >0,003%vol.

7. The method according to claim 1, characterized in that the content of butene-1 in the gas mixture 2 is >0,001%vol.

8. The method according to claim 1, characterized in that the content of TRANS-butene-2 in the gas mixture 2 is ≤1%vol.

9. The method according to claim 1, characterized in that the content of TRANS-butene-2 in the gas mixture 2 is ≤0,5%vol.

10. The method according to claim 1, characterized in that the content of TRANS-butene-2 in the gas mixture 2 is ≤0,05%vol.

11. The method according to claim 1, characterized in that the content of CIS-butene-2 in the gas mixture 2 is ≤1%vol.

12. The method according to claim 1, characterized in that the content of CIS-butene-2 in the gas mixture 2 is ≤0,5%vol.

13. The method according to claim 1, characterized in that the content of CIS-butene-2 in the gas mixture 2 is ࣘ 0,05%vol.

14. The method according to claim 1, characterized in that the content of ISO-butene in the gas mixture 2 is ≤1%vol.

15. The method according to claim 1, characterized in that the content of ISO-butene in the gas mixture 2 is ≤0,5%vol.

16. The method according to claim 1, characterized in that the content of ISO-butene in the gas mixture 2 is ≤0,05%vol.

17. The method according to claim 1, characterized in that the total content of butenes in the gas mixture 2 is ≤1%vol.

18. The method according to claim 1, characterized in that the total content of butenes in the gas mixture 2 is ≤0,5%vol.

19. The method according to claim 1, characterized in that the total content of butenes in the gas mixture 2 is ≤0,05%vol.

20. The method according to claim 1, characterized in that the total content of C4-hydrocarbons in the gas mixture 2 is ≤3%vol.

21. The method according to claim 1, characterized in that the total content of C4-hydrocarbons in the gas mixture 2 is ≤2 vol.%.

22. The method according to claim 1, characterized in that the total content of C4-hydrocarbons in the gas mixture 2 is ≤1%vol.

23. The method according to claim 1, characterized in that the total content of C4-hydrocarbons in the gas mixture 2 is >0.05 and <3%vol.

24. The method according to claim 1, characterized in that the gas mixture 1' contains ≥0,1% vol. other than propane and propylene, and oxygen components.

25. The method according to claim 1, characterized in that the gas mixture 1' contains ≥ 0,2% vol. other than propane and propylene, and oxygen components.

26. The method according to claim 1, characterized in that the gas mixture 1' contains ≥0,3% vol. other than propane and propylene, and oxygen components.

27. The method according to claim 1, characterized in that the gas mixture 1' contains ≥0,5% vol. other than propane and propylene, and oxygen components.

28. The method according to claim 1, characterized in that the gas mixture 1' contains ≥1% vol. other than propane and propylene, and oxygen components.

29. The method according to claim 1, characterized in that the gas mixture 1' contains ≥3% vol. other than propane and propylene, and oxygen components.

30. The method according to claim 1, characterized in that the gas mixture 1' contains ≥5 vol.% other than propane and propylene, and oxygen components.

31. The method according to claim 1, characterized in that the gas mixture 1' contains ≥10 vol.% other than propane and propylene, and oxygen components.

32. The method according to claim 1, characterized in that the gas mixture 1' contains ≥30% vol. other than propane and propylene, and oxygen components.

33. The method according to one of claims 1 to 32, characterized in that the gas mixture 2 contains up to 60% vol. propane.

34. The method according to one of claims 1 to 32, characterized in that the gas mixture 2 contains up to 50% vol. propane.

35. The method according to one of claims 1 to 32, otlichuy is the, what gas mixture 2 contains from 20 to 40 vol.% propane.

36. The method according to one of claims 1 to 32, characterized in that the gas mixture 2 contains

from 7 to 15% vol. About2,

from 5 to 10 vol.% propylene,

from 15 to 40 vol.% propane,

from 25 to 60 vol.% nitrogen,

from 1 to 5 vol.% the amount of CO, CO2and H2And

from 0 to 5% vol. other components,

and contained, if necessary, ammonia is not considered.

37. The method according to one of claims 1 to 32, characterized in that the gas mixture 2 contains

H2O≤60 vol.%,

N2≤80 vol.%,

O2>0, ≤20 vol.%,

CO≤2 vol.%,

CO2≤5 vol.%,

Ethan ≤10 vol.%,

ethylene ≤5 vol.%,

methane ≤5 vol.%,

propane >0, ≤50 vol.%,

cyclopropane ≤0,1%vol.,

propyne ≤0,1%vol.,

PROPADIENE ≤0,1%vol.,

propylene >0, ≤30 vol.%,

H2≤30 vol.%,

ISO-butane ≤3.%

n-butane ≤3.%

TRANS-butene-2 ≤1 vol.%,

CIS-butene-2 ≤1 vol.%,

butene-1 ≤1 vol.%,

ISO-butene ≤1 vol.%,

butadiene-1,3 ≤1 vol.%,

butadiene-1,2 ≤1 vol.%,

1-buten ≤0,5% vol. and

2-Butin ≤0,5%vol.,

and contained, if necessary, ammonia is not considered.

38. The method according to one of claims 1 to 32, otlichalis the same time, that crude propane contains ≥0,25% vol. other than propane and propylene components.

39. The method according to one of claims 1 to 32, wherein the crude propane contains ≥1% vol. other than propane and propylene components.

40. The method according to one of claims 1 to 32, wherein the crude propane contains ≥2 vol.% other than propane and propylene components.

41. The method according to one of claims 1 to 32, wherein the crude propane contains ≥3% vol. other than propane and propylene components.

42. The method according to one of claims 1 to 32, wherein the crude propane contains up to 6% vol. With4-hydrocarbons.

43. The method according to one of claims 1 to 32, wherein the crude propane contains from 0.1 to 6% vol. With4-hydrocarbons.

44. The method according to one of claims 1 to 32, wherein the crude propane contains up to 0.5% vol. butene-1.

45. The method according to one of claims 1 to 32, wherein the crude propane contains about 5. ppm to 0.5% vol. butene-1.

46. The method according to one of claims 1 to 32, wherein the crude propane contains up to 0.5% vol. of butenes.

47. The method according to one of claims 1 to 32, wherein the crude propane contains 5 ABC/m to 0,5% vol. of butenes.

48. The method according to one of claims 1 to 32, wherein the crude propane has the following characteristics:

the content of propane ≥90 vol.%,

the total content of propane and propylene ≤99%,

< num="93"> the total content of C4-hydrocarbons<6%,

the content of butene-1 ≤0,5%vol.,

the total content of butenes ≤0,5%vol.,

the content of ethane ≤10 vol.%,

the ethylene content ≤5 vol.%,

methane ≤5 vol.%,

the content of cyclopropane ≤0,1%vol.,

the content of propylene ≤10 vol.%,

the total content other than propane and propylene

With3-hydrocarbons ≤0,3 vol.%,

the total content of C5-hydrocarbons ≤0,3% vol. and

the total content of C6to C8-hydrocarbons ≤600 OBC/million

49. The method according to one of claims 1 to 32, characterized in that the conversion of propane in the first stage ranges from ≥5 mol.% to ≤30 mol.%.

50. The method according to one of claims 1 to 32, characterized in that the gas mixture of the product of gas-phase partial oxidation and/or partial gas-phase Immokalee separating at least one product of partial oxidation and/or amoxiline propylene and at least contained in this gas mixture, unreacted propane recycle to the first stage and/or gas-phase partial oxidation and/or gas-phase amoxilina.

51. The method according to one of claims 1 to 32, characterized in that it is carried out in at least one reaction zone to the catalyst layer, the active mass of which is ENISA least represents the mass of metal oxides, which comprises in combination at least the elements Mo, V, at least one of the two elements Te and Sb, and at least one element selected from the group including Nb, TA, W, Ti, Al, Zr, Cr, Mn, Ga, Fe, Ru, Co, Rh, Ni, Pd, Pt, La, Bi, B, Ce, Sn, Zn, Si, Na, Li, K, Mg, Ag, Au and In.

52. The method according to § 51, characterized in that the active mass is, at least, a lot of metal oxides, which has a stoichiometry of elements I

where

M1=Te and/or Sb,

M2= at least one element selected from the group including Nb, TA, W, Ti, Al, Zr, Cr, Mn, Ga, Fe, Ru, Co, Rh, Ni, Pd, Pt, La, Bi, CE, Sn, Zn, Si, Na, Li, K, Mg, Ag, Au and In,

b=0.01 to 1,

with=>0 to 1 and

d=>0 to 1.

53. The method of paragraph 52, wherein M1=Te and M2=Nb, TA, W and/or Ti.

54. The method according to paragraph 52 or 53, characterized in that M2=Nb.

55. The method according to § 51, wherein the at least one active mass of the metal oxide has an x-ray diffraction pattern, the diffraction reflexes h and i which have peaks (highs) with the angles of diffraction of 22.2±0,5° (h) and 27.3±0,5° (i).

56. The method according to § 55, characterized in that the x-ray diffraction pattern has additionally diffraction reflex k, the peak of which is the diffraction angle of 28.2±0,5°.

57. The method according to § 55 or 56, the tives such as those that diffraction reflex h inside the x-ray diffraction is the most intense and the half-width of the peak is a maximum of 0.5°.

58. The method according to § 57, characterized in that the width of the diffraction peak of reflex i and diffraction reflex k advanced at the same time makes each ≤1° and the intensity of the Pkdiffraction reflex k and the intensity of the Pidiffraction reflex i perform ratio of 0.20≤R≤to 0.85, where R is expressed by the formula

R=Pi/(Pi+Pk)

the ratio of intensities.

59. The method according to § 51, characterized in that the x-ray diffraction pattern, at least one active mass of metal oxides has no diffraction reflex, the maximum of which is 2Θ=50±0,3°.

60. The method according to one of claims 1 to 32, characterized in that the first stage is carried out in a separate reaction zone.

61. The method according to p, characterized in that the first stage is a heterogeneously-catalyzed dehydrogenation.

62. The method according to p, characterized in that the gas mixture 1 contained therein, other than propane and propylene component is separated by a certain amount, which includes at least one4the hydrocarbon.

63. The method according to p, characterized in that the gas mixture 1 contained in n the th, other than propane and propylene component is separated by a certain amount, which includes at least one butene.

64. The method according to p, characterized in that the gas mixture 1 contained therein, other than propane and propylene component is separated by a certain amount, which includes, at least, butene-1.

65. The method according to p, characterized in that when heterogeneous catalyzed gas-phase partial oxidation and/or partial gas-phase amoxiline used catalyst, the active mass which contains the elements Mo, Bi and Fe.

66. The method according to p, characterized in that when heterogeneous catalyzed gas-phase partial oxidation and/or partial gas-phase amoxiline used catalyst, the active mass of which contains a metal oxide of General formula IV

in which the variables have the following meanings:

X1= means the Nickel and/or cobalt,

X2= means thallium, an alkali metal and/or alkaline earth metal,

X3= means zinc, phosphorus, arsenic, boron, antimony, tin, cerium, lead and/or tungsten,

X4= means silicon, aluminum, titanium and/or zirconium,

a = is the number from 0 to 5,

b = is the number of from 0.01 to 5

C = is the number from 0 to 10,

d = is the number from 0 up to 2,

e = equal to the number of from 0 to 8,

f = is equal to the number from 0 to 10 and

n = is the number that is determined by the valence and amount of non-oxygen elements in the formula (IV).

67. The method according to p, characterized in that when heterogeneous catalyzed gas-phase partial oxidation is used, the catalyst, the active mass which contains the elements Mo and V.

68. The method according to p, characterized in that when heterogeneous catalyzed gas-phase partial oxidation is used, the catalyst, the active mass of which is a metal oxide of General formula VII

Mo12VaXb1Xc2Xd3Xe4Xf5Xg6On

in which the variables have the following meanings:

X1= W, Nb, TA, Cr and/or CE,

X2= Cu, Ni, Co, Fe, Mn and/or Zn,

X3= Sb and/or Bi,

X4= one or more alkali metals,

X5= one or more alkaline earth metals

X6= Si, Al, Ti and/or Zr,

a = 1 to 6,

b = from 0.2 to 4,

from = from 0.5 to 18,

d = from 0 to 40,

e = from 0 to 2,

f = from 0 to 4,

g = from 0 to 40,

n = is the number that is determined by the valence and amount of non-oxygen elements in the form of the OLE VII.

69. The method according to one of claims 1 to 32, characterized in that in the first stage, the crude propane in the presence and/or absence of oxygen is subjected to a heterogeneously-catalyzed dehydration and gas mixture 1 is subjected to a heterogeneously-catalyzed gas-phase Immokalee contained in the gas mixture 1 propylene.

70. The method according to one of claims 1 to 32, characterized in that in the first stage, the crude propane in the presence and/or absence of oxygen and in the presence of water vapor is subjected to a heterogeneously-catalyzed dehydration and formed in the first stage of the gas mixture 1 is completely or partially separate the water vapor condensation and resulting gas mixture 1' is subjected to a heterogeneously-catalyzed gas-phase partial oxidation and/or partial gas-phase Immokalee contained in the gas mixture 1' propylene.

71. The method according to one of claims 1 to 32, characterized in that in the first stage, the crude propane is subjected autothermal heterogeneously-catalyzed dehydration.

72. The method according to one of claims 1 to 32, characterized in that the gas mixture 1 and/or gas mixture 1' as a component of the gas mixture 2 is subjected to a heterogeneously-catalyzed partial gas-phase Immokalee contained in the gas mixture 1 and/or in the gas mixture 1' propylene.



 

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5 cl, 1 dwg, 2 ex

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to the improved method for preparing acrylic acid and selective oxidation of propylene to acrolein. Method involves carrying out reaction of propylene with oxygen in the first zone reaction with the first catalyst corresponding to the following formula: AaBbCcCadFeeBifMo12Ox wherein A means Li, Na, K, Rb and Cs and their mixtures also; B means Mg, Sr, Mn, Ni, Co and Zn and their mixtures also; C means Ce, Cr, Al, Sb, P, Ge, Sn, Cu, V and W and their mixtures also wherein a = 0.01-1.0; b and e = 1.0-10; c = 0-5.0 but preferably 0.05-5.0; d and f = 0.05-5.0; x represents a number determined by valence of other presenting elements. Reaction is carried out at enhanced temperature providing preparing acrylic acid and acrolein and the following addition of acrolein from the first reaction zone to the second reaction zone containing the second catalyst used for conversion of acrolein to acrylic acid. Method provides high conversion of propylene to acrylic acid and acrolein.

EFFECT: improved preparing method.

7 cl, 1 tbl, 5 ex

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to the improved method for preparing acrylic acid and selective oxidation of propylene to acrolein. Method involves carrying out reaction of propylene with oxygen in the first zone reaction with the first catalyst corresponding to the following formula: AaBbCcCadFeeBifMo12Ox wherein A means Li, Na, K, Rb and Cs and their mixtures also; B means Mg, Sr, Mn, Ni, Co and Zn and their mixtures also; C means Ce, Cr, Al, Sb, P, Ge, Sn, Cu, V and W and their mixtures also wherein a = 0.01-1.0; b and e = 1.0-10; c = 0-5.0 but preferably 0.05-5.0; d and f = 0.05-5.0; x represents a number determined by valence of other presenting elements. Reaction is carried out at enhanced temperature providing preparing acrylic acid and acrolein and the following addition of acrolein from the first reaction zone to the second reaction zone containing the second catalyst used for conversion of acrolein to acrylic acid. Method provides high conversion of propylene to acrylic acid and acrolein.

EFFECT: improved preparing method.

7 cl, 1 tbl, 5 ex

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