以前的順酐（馬來酸酐）樣子以粉末主體，由于馬來酸酐、具備嗆鼻和辣眼的味道，因此粉末對人的刺激性更大，并且量太低，因此慢慢被片狀順酐取代?，F階段還要制造粉末狀順酐的廠家基本上沒有，有都是作為獨特顧客人群的商品在少量制造，不規模。
In the past, maleic anhydride (maleic anhydride) was mainly powder. Because maleic anhydride had the smell of choking nose and spicy eyes, the powder was more irritating to people, and the production was too low, so it was slowly replaced by flake maleic anhydride. At this stage, there are basically no manufacturers to manufacture powdered maleic anhydride. Some of them are manufactured in a small amount as commodities of unique customer groups, which is not large-scale.
片狀順酐（馬來酸酐）由于流水線的切割刀鋼度較為強，而順酐自身是結晶，因此所切的片的樣子沒辦法操縱，沒辦法保證勻稱，會有許多粉末造成，封進包裝袋子后，商品一受潮，一擠壓成型，還是非常容易粘成塊狀，導致加料的不便捷，并且量上提不上，落伍的加工工藝淘汰也不新奇了。
Because the cutting knife of the production line has strong rigidity and the maleic anhydride itself is crystalline, the shape of the cut pieces can not be manipulated and symmetrical, which will be caused by many powders. After being sealed in the packaging bag, once the goods are damp and extruded, they are still very easy to stick into blocks, resulting in inconvenient feeding, Moreover, the production volume can not be raised, and the elimination of outdated processing technology is not novel.
受原材料苯的上漲，各地域剛開始挺價實際操作，苯法加工廠受原材料上漲危害團體上漲，并且廉價貨慢慢得勢，持貨商沒有響應積極主動，廉價出不來，援手主要加工廠，但是受中下游產銷率不夠危害，預估上漲力度不容易很大，等主要加工廠出具體指導價錢。
Due to the rise of raw material benzene, local regions have just begun to support the actual operation of price. Benzene process plants are affected by the rise of raw materials, and cheap goods are slowly gaining momentum. The goods holders do not respond actively and can not come out cheaply to help the main processing plants. However, due to the insufficient production and marketing rate in the middle and lower reaches, it is not easy to estimate the rise, and the main processing plants give specific guidance prices.
