 오퍼게시판 |
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제 목:
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propionaldehyd |
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상품분류: |
유기화학원료와 중간체
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등록분류: |
Offer to Sell |
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내용: |
CAS NO: CAS：123-38-6
Payment: L/C at 30days after sight
Additional_detail: Character: clear, colorless
flammable liquid, asphyxiating
stimulate the smell. Melting
point -81 ℃. Boiling point of
47.9 ℃, 47 ℃ (98.4 kPa), 45 ℃
(91.4 kPa), the relative density
of 0.7970 (20 / 4), the
refractive index of 1.3619, flash
point (a cup) -7.22 ~ -9.44 ℃,
burning 220 ℃, viscosity (25 ℃)
0.320 mPa s, heat capacity (20
℃) 2.1856 J / (g ℃), heat of
vaporization (0.1 MPa) 896J / g,
vapour pressure (20 ℃) 34.4 kPa,
surface tension of 21.8 mN / m
(20 ℃). With alcohol, ether
immiscibility, insoluble in
water.
Preparation: Although there are a
variety of propionaldehyde
preparation methods, but until
the early 1950s started
industrial production, in 1975
the U.S. company Union Carbide
built to rhodium - phosphine as a
catalyst, by the low-pressure
ethylene by Oxo the system
propionaldehyde The first 45,000
t with an annual output of large-
scale installations, the low
pressure Oxo propanal law has
gradually become the primary
means of production and direction
of development. In 1981 the
United States, Japan and Western
Europe propionaldehyde total
production capacity of 230,000 t,
more than 95 percent is used by
low-voltage Oxo production. 1.
Carbonyl (tang) from the
synthesis of ethylene and carbon
monoxide, hydrogen from the
reaction step. Initially in
carbonyl cobalt as a catalyst in
the high-pressure (14.7-19.6 MPa)
under. In recent years the
development of a rhodium complex
as the catalyst of phosphine
synthesis, the reaction
temperature 100 ℃, pressure 1.27-
1.47 MPa. The method produced no
isomer separation is simple. 2.
Propylene oxide isomerization of
1,2 - propylene oxide in the
presence of chrome vanadium
catalyst isomerization derived
from the gas. In addition,
alcohol oxidation and acrolein
hydrogenation law. Propylene
palladium chloride as a catalyst
to direct the production of
acetone, a by-product of 0.5-1.5
percent propionaldehyde, when the
increase in the chloride content
of palladium catalyst for the
reaction temperature,
propionaldehyde-product ratio can
be increased to 50 percent.
Purposes: propionaldehyde is fine
chemicals important raw
materials, mainly used in the
production of Zheng Bingchun,
propionate, the three
hydroxymethyl-ethane,
propionaldehyde oxime, and other
intermediates, further production
of alkyd resins, pesticides and
herbicides kill Pest agent,
Seoul, pain and sleep drug
thiazin-B, also widely used in
the coatings, plastics, food,
textile, feed, rubber additives
in the production of fine
chemicals. Can be linked to the
termination of ethylene
polymerization agent.
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Zhang Yinbin |
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